Confidential
Service manualTM-U675/U675P
(without autocutter)
English401093601
Issued Date 200 , ,
Issued by
EPSON
Confidential TM-U675/U675P(without autocutter) Service Manual
Revision Table
Rev. Page Description
Rev. A All pages Newly authorized
Rev. B Front cover
Manual title changed in the following way.
Old: TM-U675/U675P (with MICR)New: TM-U675/U675P (without autocutter)
Reason for change:There was a need to review the TM-U675/U675P service manual due to the addition of “with autocutter” and “paper path spacer supported model.”
New manual system:The TM-U675/U675P service manual has been separated into the following 2 volumes.
TM-U675/U675P (without autocutter) service manual (this manual)(Applicable models:)• TM-U675/U675P without autocutter• TM-U675/U675P with MICR/without MICR• TM-U675/U675P paper path spacer supported model / paper path spacer unsupported
model
TM-U675/U675P (with autocutter) service manual (manual code: 4012391)(Applicable models:)• TM-U675/U675P with autocutter• TM-U675/U675P with MICR/without MICR
All pages Headers of all pages have been changed in the following way.
Old: TM-U675/U675P (with MICR) service manualNew: TM-U675/U675P (without autocutter) service manual
Reason for change:There was a need to review the TM-U675/U675P service manual system.
Chapter 2
The explanations of Chapter 2 have been completely revised. Also, some illustrations have been revised as a result.
Reason for change:To make the explanation easier to understand.
1-20, 1-21
Changed the explanation for “Removing Paper Jam.”
Reason for change:Mistakes and missing information.
AppendixE, F-1, G-1
Eliminated the RS-232 I/F circuit board unit “connector plate (type AA)” from the parts list and the exploded diagram.
Reason for change:The RS-232 I/F circuit board unit “connector plate (type AA)” is no longer supplied as a service part.
Revision Table i
Confidential
Rev. B(con-tinued)
2-114,AppendixE,F-1, G-1
Removed the “caution seal” and added the “head caution seal.” The number of “caution seals” used changed from 2 to 1.
Seal design
• Caution seal (Eliminated part)
• Head caution seal (Added part)
Reason for change:Improvement in safety.
3-10 Added “CAUTION.”
Reason for change:Missing in earlier version.
B-2, B-3
Changed the period for cleaning the MICR head in the following way.
Old: Every three monthsNew: Once a year or every 72,000 passes
Reason for change:Higher MICR head performance than originally estimated is confirmed.
D-67 -D-76
Changed contents of manual to align with changes in specifications. (Details omitted.)
1-14 Table 1-4, step 8 “Location of Measurement” has been changed in the following way.
Old: Located near Q7 drainNew: Located near Q7 source
Reason for change:Missing in earlier version.
D-32 Eliminated the explanation for “Endorsement printing.”
Reason for change:Missing in earlier version.
Rev. Page Description
ii Revision Table
Confidential TM-U675/U675P(without autocutter) Service Manual
Rev. B(con-tinued)
D-57 The following descriptions have been eliminated.
Through this example uses a bar magnetic, actual reading of magnetic ink characters is performed by passing current through a coil in the read head, creating an electromagnetic field.
Reason for change:Missing in earlier version.
AppendixE, F-1, G-1
Added “76 mm width specification kit.”
76 mm width specification kit76 mm roll paper can be used by attaching the following components to the “roll paper holder.”
Reason for change:The “76 mm kit” was to be included or to be assembled at shipment part way through production.
2-86,2-114,3-10,AppendixE,F-1,G-1,Adden-dum 1
Added an explanation for the “paper path spacer supported model.” See Addendum 1 for details of the “paper path spacer supported model.”
Reason for change:The “paper path spacer supported model” was added.
Rev. Page Description
159
160
161
159 = Roll paper guide160 = Holder plate (type B)161 = 76 mm kit
(Numbers indicate those used in the exploded diagrams.)
Revision Table iii
Confidential
iv Revision Table
Rev. B i
TM-U675/U675P (without autocutter) Service ManualConfidentialCONFIDENTIALITY AGREEMENT
BY USING THIS DOCUMENT, YOU AGREE TO ABIDE BY THE TERMS OF THIS AGREEMENT. PLEASE RETURN THIS DOCUMENT IMMEDIATELY IF YOU DO NOT AGREE TO THESE TERMS.
This document contains confidential, proprietary information of Seiko Epson Corporation or its affiliates. You must keep such information confidential. If the user is a business entity or organization, you must limit disclosure to those of your employees, agents, and contractors who have a need to know and who are also bound by obligations of confidentiality.
On the earlier of (a) termination of your relationship with Seiko Epson, or (b) Seiko Epson’s request, you must stop using the confidential information. You must then return or destroy the information, as directed by Seiko Epson.
If a court, arbitrator, government agency, or the like orders you to disclose any confidential information, you must immediately notify Seiko Epson. You agree to give Seiko Epson reasonable cooperation and assistance in the negotiation.
You may use confidential information only for the purpose of operating or servicing the products to which the document relates, unless you obtain the prior written consent of Seiko Epson for some other use.
Seiko Epson warrants that it has the right to disclose the confidential information. SEIKO EPSON MAKES NO OTHER WARRANTIES CONCERNING THE CONFIDENTIAL INFORMATION OR ANY OTHER INFORMATION IN THE DOCUMENT, INCLUDING (WITHOUT LIMITATION) ANY WARRANTY OF TITLE OR NON-INFRINGEMENT. Seiko Epson has no liability for loss or damage arising from or relating to your use of or reliance on the information in the document.
You may not reproduce, store, or transmit the confidential information in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without the prior written permission of Seiko Epson.
Your obligations under this Agreement are in addition to any other legal obligations. Seiko Epson does not waive any right under this Agreement by failing to exercise it. The laws of Japan apply to this Agreement.
Cautions No part of this document may be reproduced, stored in a retrieval system, or transmitted in any form or by any
means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Seiko Epson Corporation.
The contents of this document are subject to change without notice. Please contact us for the latest information.
While every precaution has been taken in the preparation of this document, Seiko Epson Corporation assumes no responsibility for errors or omissions.
Neither is any liability assumed for damages resulting from the use of the information contained herein.
Neither Seiko Epson Corporation nor its affiliates shall be liable to the purchaser of this product or third parties for damages, losses, costs, or expenses incurred by the purchaser or third parties as a result of: accident, misuse, or abuse of this product or unauthorized modifications, repairs, or alterations to this product, or (excluding the U.S.) failure to strictly comply with Seiko Epson Corporation’s operating and maintenance instructions.
Seiko Epson Corporation shall not be liable against any damages or problems arising from the use of any options or any consumable products other than those designated as Original EPSON Products or EPSON Approved Products by Seiko Epson Corporation.
EPSON® and ESC/POS® are registered trademarks of Seiko Epson Corporation
ii Rev. B
ConfidentialContents
Revision TableConfidentiality Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iFor Safe Repair and Maintenance Work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Key to Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viSafety Precautions on Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viSafety Precautions on Maintenance/Repair/Inspection . . . . . . . . . . . . . . . . . vii
Note on Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viiiModular Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viiiAbout This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Aim of the Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ixManual Content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Chapter 1 Troubleshooting
Before Servicing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Diagnosing Failures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Symptoms and Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1Printer Mechanism Power on Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Opening and Closing the Platen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4Detecting the Head Carriage Home Position . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Starting and Stopping Self Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6Printing Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6Ending the Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6MICR Reader Test (Only with Printers that Have a MICR Unit) . . . . . . . . . . 1-7
Troubleshooting Using the ERROR LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9Test Points on the Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11Test Points on the Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Power Supply Line Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13Locations of the Main Elements on the Main Circuit Board Unit . . . . . . . . . . . . . . 1-15Procedures for Replacing the Print Head Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16Removing Paper Jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Paper Jams in the Roll Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20Paper Jams in the Slip Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
Detector Functions and Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
Chapter 2 Assembly and Disassembly
Before Assembly and Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1About this Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1Assembling the Mechanism Assembly (M-U675) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Pre-assembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2Assembly of the Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46
Assembling the TM-U675/U675P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-84Pre-assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-84Assembly of the TM-U675 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-86
Chapter 3 Adjusting and Setting
Before Adjusting and Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1Phase Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2Adjusting the Platen Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8Setting Threshold Values for Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Rev. B iii
TM-U675/U675P (without autocutter) Service ManualConfidentialAppendix A Service Tools and Lubricants
Appendix B Maintenance
Maintenance and Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1Daily Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1Periodic Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
MICR Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3Cleaning Sheet Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3Procedures for Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Appendix C Installation
Connecting to the Host PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1Connecting the Drawer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2Connecting to a Direct Connection Display Module . . . . . . . . . . . . . . . . . . . . . . . . C-3Power Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Appendix D Product Overview
Component Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1Outline of Printer Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2
Printing Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2Detection Mechanism Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-7Roll Paper Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-15Slip Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-25Validation Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-29Ribbon Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-29MICR Mechanism (Factory Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-31
Outline of Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-34Connection of Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-34Circuit Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-35Memory Circuit Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-36Main Circuit Board Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-37CPU and Peripheral Logic Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-39Slip Mechanism Drive Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-50Input Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-60Control Panel Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-63Malfunction Protective Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-64Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-65Important Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-66
DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-67Serial Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-67Parallel Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-69
Outline of Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-70Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-70Printer Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-71MICR Reader (Factory Option) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-72Overall Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-73Interface Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-74
Appendix E Parts List
Alphanumeric List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-1Reference Number List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E-9
iv Rev. B
ConfidentialAppendix F Exploded Diagrams
TM-U675/U675P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-1Mechanism Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-2Mechanism Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-3Frame Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-4Frame Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-5Carriage Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-6PF Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-7MICR Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F-8
Appendix G General Lubrication Point Diagrams
TM-U675/U675P . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-1Mechanism Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-2Mechanism Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-3Frame Assembly (without MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-4Frame Assembly (with MICR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-5Carriage Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-6PF Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-7MICR Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-8
Appendix H Circuit Board Unit Circuit Diagrams
Main Circuit Board Assembly (Outline) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-1Main Circuit Board Assembly (1 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-2Main Circuit Board Assembly (2 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-3Main Circuit Board Assembly (3 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-4Main Circuit Board Assembly (4 of 4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-5Main Circuit Board Assembly (MICR I/F Block) . . . . . . . . . . . . . . . . . . . . . . . H-6
Main Circuit Board Assembly (Memory Block) . . . . . . . . . . . . . . . . . . . . . . . . . . . . H-7RS-232 I/F Circuit Board Assembly (UB-S01) Circuit Diagram . . . . . . . . . . . . . . . H-8Parallel I/F Circuit Board Assembly (UB-P02) Circuit Diagram . . . . . . . . . . . . . . H-9RS-485 I/F Circuit Board Assembly (UB-S02) Circuit Diagram . . . . . . . . . . . . . . . H-10
Appendix I Printer Handling
Using the Power Switch Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-1Opening the Front Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-2Installing or Replacing the Paper Roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-2
Removing paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-5Installing the Ribbon Cassette . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-7Inserting Slip Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-9Inserting Validaton Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-9Reading MICR Characters On Personal Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-10Adjusting the Roll Paper Near End Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-11Using the Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12
Control Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12PAPER OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12SLIP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12Control Panel Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-12FEED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-13RELEASE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-13
Appendix J Screw Types
Appendix K Parts Layout
Main Circuit Board Unit (Parts Side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K-1Main Circuit Board Unit (Solder Side) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K-2
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Addendum 1 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model)
TM-U675 PPSS Model Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-2TM-U675 PPSS Model Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-3How to Identify the TM-U675 PPSS Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-4Installing and Removing the Paper Path Spacer . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-5
Removing the Paper Path Spacer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-5Installing the Paper Path Spacer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-7
Setting Threshold Values for Detectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Addendum 1-11
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Key to Symbols
The symbols in this manual are identified by their level of importance, as defined below. Read the following carefully before handling the product.
WARNING:You must follow warnings carefully to avoid serious bodily injury.
CAUTION:Observe cautions to avoid minor injury to your self, damage to your equipment, or loss of data.
Note:Notes have important information and useful tips on the operation of your equipment.
Safety Precautions on Handling
This section presents important information intended to ensure safe and effective use of this product. Please read this section carefully and store it in an accessible location.
WARNING:Shut down your equipment immediately if it produces smoke, a strange odor, or unusual noise. Continued use may lead to fire or electric shock. Immediately unplug the equipment.
Only disassemble this product as described in this manual. Do not make modifications to the unit. Tampering with this product may result in injury, fire, or electric shock.
Be sure to use the specified power source. Connection to an improper power source may cause fire or shock.
Never insert or disconnect the power plug with wet hands. Doing so may result in severe shock.
Do not allow foreign matter to fall into the equipment. Penetration by foreign objects may lead to fire or shock.
If water or other liquid spills into this equipment, unplug the power cord immediately. Continued usage may lead to fire or shock.
Do not place multiple loads on the power outlet (wall outlet). Overloading the outlet may lead to fire.
Rev. B vii
TM-U675/U675P (without autocutter) Service ManualConfidentialAlways supply power directly from a standard domestic power outlet.
Handle the power cord with care. Improper handling may lead to fire or shock.
Do not modify or attempt to repair the cord.
Do not place any object on top of the cord.
Avoid excessive bending, twisting, and pulling.
Do not place cord near heating equipment.
Check that the plug is clean before plugging it in.
Be sure to push the prongs all the way in.
CAUTION:Do not connect cables in ways other than those mentioned in this manual. Different connections may cause equipment damage and burning.
Be sure to set this equipment on a firm, stable, horizontal surface. Product may break or cause injury if it falls.
Do not use in locations subject to high humidity or dust levels. Excessive humidity and dust may cause equipment damage, fire, or shock.
Do not place heavy objects on top of this product. Never stand or lean on this product.Equipment may fall or collapse, causing breakage and possible injury.
To ensure safety, please unplug this product prior to leaving it unused for an extended period.
Do not touch the print head or the paper feed motor. Wait for the head and the motor to cool. The head and the motor can be very hot after printing for a long time. Touching them may cause burns.
Safety Precautions on Maintenance/Repair/Inspection
WARNING:Be sure to use the designated type of fuse for the circuit board. Use of a different type may result in fire.
Remove the power cord and all other cables from this product before disassembly or reassembly to prevent electrical shock.
To prevent the possibility of electrical shock, do not perform maintenance, repair, or inspection during a thunder storm.
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CAUTION: Wear a grounded wrist band when handling the internal circuit boards to prevent damage from static electricity.
When removing an internal circuit board, place it on an anti-static rubber sheet or similar surface to prevent damage from static electricity.
Parts on the circuit board may become hot during operation. Therefore, wait approximately 10 minutes after turning the power off before touching them.
Be careful not to subject the circuit boards to shock or vibration, because this may damage them.
Do not touch the circuit board or cable terminals with your hands to prevent contamination that may result in a malfunction.
Do not use an alcohol, benzine, thinner, trichloroethylene, or ketone-based solvent to clean the parts. This type of solvent may damage the plastic and rubber parts.
Wipe off any dirt with a dry or slightly moist cloth. Be sure to remove the power cord from the outlet at this time.
Note on Disposal
Note:Be sure to follow current laws or regulations when disposing of the product.
Modular Connector
The following label is visible near the two modular connectors on the back of this product.
Use the modular connectors specifically designed for the cash drawer and customer display for this product. Do not connect these connectors to an ordinary telephone line.
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About This Manual
Aim of the Manual
This manual was created to provide the information on printer maintenance and repair required by technicians who handle this work.
Manual Content
The manual is made up of the following sections:
Chapter 1 Troubleshooting Describes troubleshooting procedures (specific problems and remedies)
Chapter 2 Assembly and Disassembly Describes product assembly and disassembly
Chapter 3 Adjusting and Setting Describes product adjustment and setting procedures
Appendix A Service Tools and Lubricants
Describes tools and lubricants required to perform maintenance and repair
Appendix B Maintenance Describes required procedures to perform maintenance and inspection
Appendix C Installation Describes installation procedures
Appendix D Product Overview Provides reference information for maintenance and inspection
Appendix E Parts List Contains a list of spare parts
Appendix F Exploded Diagrams Disassembly diagrams for the product
Appendix G General Lubrication Point Diagrams
Lubrication point diagrams for this product
Appendix H Circuit Board Unit Circuit Diagrams
Circuit diagrams for the product
Appendix I Printer Handling Describes required handling procedures when performing maintenance and repair
Appendix J Screw types Describes screw types
Appendix K Parts layout Describes parts layout
Addendum 1 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model)
This addendum explains the differences in maintenance for the TM-U675 model that supports paper path spacers. Note that this model is called as the validation/slip model from sales point of view.
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Chapter 1TroubleshootingBefore Servicing
The beginning of this manual (pages vi to ix) provides precautions you should observe to perform work safely and the necessary information to service this product safely. Always read that information before starting your work.
Diagnosing Failures
Use one of the following methods to diagnose the area where a failure occurred.
See Table 1-1 for diagnosing the area where a failure occurred by the symptom of the problem.
See Table 1-2 on page 1-9 for diagnosing the area where a failure occurred from the ERROR LED code.
See Table 1-4 on page 1-13 when the failure is on the main circuit board unit.
Note:The explanation of how to use the self test is on page 1-6.The explanation of power on self checks is on page 1-4.
Symptoms and Solutions
This explains how to find the source of a problem using the symptom. The numbers in the Solutions column indicate the order to use to check the problem. If you cannot determine the cause of the problem after checking the first item, proceed to the next number.
Table1-1 Symptoms and Checkpoints
Symptom Checkpoints (by Priority)
Power does not turn on.Power on self check is not completed.Or, POWER LED does not light.
1. Check the power supply unit. Check that 24V is coming out of the power supply.
2. Check the main circuit board unit. (See page 1-13.) 3. Unplug the printer. Then unplug each motor or coil's connector
from the main board one by one; plug the printer back in, and power it on. This will let you know if any motor or coil has burned out and is pulling down the power. (See page 1-11.)
4. Replace the I/F circuit board. (See page 2-110.)
There are missing dots in the print. 1. Replace the print head unit. (See page 1-17.)2. Replace the main circuit board unit. (See page 2-86.)
The print is thin. 1. Replace the ribbon cassette. (See page I-7.)2. Proceed to “Ribbon won’t feed” below.
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Ribbon won’t feed. 1. Replace the ribbon cassette. (See page I-7.)2. Check sprocket and gears for paper particles.3. Check the carriage motor and gears. (See page 1-11.)4. Replace the main circuit board. (See page 2-86.)
Unevenness occurs in the concentration of the print.
1. Replace the ribbon cassette. (See page I-7.)2. Adjust the platen gap. (See page 3-8.)
There is ink smudging on the print surface. 1. Check for paper residue around the print head unit.2. Adjust the platen gap. (See page 3-8.)
Paper jams Remove the jammed paper by following the directions in “Removing Paper Jams” on page 1-20.
Roll paper feed failure 1. Check that the roll paper is inserted correctly. (See page I-2.)2. Check the paper feed motor. (See page 1-11.)3. Check the J/S change solenoid. (See page 1-11.)4. Replace the main circuit board unit. (See page 2-86.)
Slip paper/validation paper feed failure 1. Check that the slip paper/validation paper is inserted correctly. (See page I-9)
2. Check the paper feed motor. (See page 1-11.)3. Check the J/S change solenoid. (See page 1-11.)4. Replace the main circuit board unit. (See page 2-86.)
Roll paper take-up failure 1. Check that the roll paper is inserted correctly. (See page I-5.)2. Check that the take-up assembly is installed correctly into the
printer. (See page I-5.)3. Check that the take-up belt is attached correctly. (See page 2-99.)4. Check the paper feed motor. (See page 1-11.)5. Check the J/S change solenoid. (See page 1-11.)6. Replace the main circuit board. (See page 2-86.)
The printer won’t recognize when slip paper is inserted.
1. Clean away dirt around the slip B. O. F. detector assembly or the slip T. O. F. detector assembly. (See page B-2.)
2. Replace the slip B. O. F. detector assembly. (See page 2-54.)3. Replace the slip T. O. F. detector assembly. (See page 2-68.)4. Replace the main circuit board unit. (See page 2-86.)
The printer won’t recognize when validation paper is inserted.
1. Clean away dirt around the validation detector assembly. (See page B-2.)
2. Replace the validation detector assembly. (See page 2-54.)3. Replace the main circuit board unit. (See page 2-86.)
Roll paper semi-auto loading paper feed failure
1. Check that the roll paper is inserted correctly. (See page I-2.)2. Remove paper residue and dirt from the inside the paper feed
frame assembly.3. Check the paper feed motor. (See page 1-11.)4. Check the J/S change solenoid. (See page 1-11.)5. Replace the main circuit board unit. (See page 2-86.)
Table1-1 Symptoms and Checkpoints
Symptom Checkpoints (by Priority)
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Drawer kick operation failure 1. Replace the main circuit board unit. (See page 2-86.)
Display module display failure 1. Check that the unit is a serial model. (The display module will not work on parallel models.)
2. Check that DIP switch 2-2 is set to ON. (If it is OFF, the display module will not work.)
3. Check fuse F3 on the main circuit board unit. (See page 1-15.)4. Replace the main circuit board unit. (See page 2-86.)
MICR reading failure 1. Clean the MICR head. (See page B-3.)2. Replace the MICR head. (See page 2-72.)3. Replace the MICR fixing and MICR fixing sheet. (See page 2-10)4. Replace the MICR solenoid. (See page 2-12.)5. Replace the main circuit board unit. (See page 2-86.)
Missing characters/misprinted characters/font breakdown
1. Check the settings of the DIP switches. (See page D-67.)2. Replace the interface cable. (See page C-1.)
ERROR LED is lit.(When it is flashing, see page 1-9.)
1. Close the front cover or roll paper cover (rear cover).2. Replace with new roll paper. (See page I-2.)
Table1-1 Symptoms and Checkpoints
Symptom Checkpoints (by Priority)
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Printer Mechanism Power on Checks
The printer mechanism runs through the following tests when you turn on the power supply to the printer.
Opens and closes the platen. Detects carriage home position. Feeds roll paper to the printer.
This section describes the items that you can check visually.
Opening and Closing the Platen
The printer opens and closes the platen once. Check this operation with the front cover opened.
Figure 1-1 Opening and closing the platen
Detecting the Head Carriage Home Position
The head carriage on a dot impact printer moves to the left side (home position) once and then to the right side before stopping. Check this operation with the front cover opened.
Figure 1-2 Detecting the head carriage home position
check for the platen open and close operation
check for head carriage movement
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Feeding Roll PaperRoll paper is fed 1 to 2 mm. You cannot see this if the roll paper is not inserted.
Figure 1-3 Feeding roll paper
check for paper feed
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Starting and Stopping Self Tests
Printing Tests
Starting the Tests
Roll paper self test:
The printer starts printing on the roll paper when you turn on the power while holding down the receipt FEED button when all the covers are closed.
Slip paper self test:
The SLIP LED flashes and the printer enters the slip paper wait mode when you turn on the power while holding down the RELEASE button when all the covers are closed. Printing starts on the slip paper when you insert a slip of paper in the printer.
Validation paper self test:
Turn on the power supply while holding down the FEED and the RELEASE buttons while the cover is closed. The SLIP LED flashes and the printer enters the validation paper wait status. In this state, printing begins on the validation paper when you insert validation paper.
Test Wait Mode
Roll paper self test:
After the test print is completed, the printer enters the self test wait mode. The PAPER OUT LED flashes after printing "SELF-TEST printing. Please press PAPER FEED button."Test printing starts when you press the receipt paper FEED button.
Slip paper self test:
When the printer status print is completed, the printer ejects the slip and waits for the next slip of paper. Test printing starts when you insert a slip of paper in the printer.
Validation paper self test:
When the printer has ejected the validation paper, you can insert the next validation sheet and printing continues.
Ending the Test
The printer prints "***completed***" and the test ends when the determined number of lines have been printed. The printer enters the normal mode after the power on tests are completed.
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MICR Reader Test (Only with Printers that Have a MICR Unit)1. Load the roll paper in the printer.
2. Turn off the power supply to the printer.
3. Open the roll paper cover.
4. Press the RELEASE button while turning on the power supply.
5. Press the RELEASE button seven times.
6. Close the roll paper cover.
7. The following message is printed on the roll paper. The SLIP LED flashes.
8. Insert check paper into the printer. Insert so that the MICR characters are facing upward on one side of the paper insertion slot. The printer will run a test to read the check.
9. After reading is completed, remove the check. The printer prints the check data on the roll paper.
**** RECOGNITION MODE ****
Please set check.
<Example Printing> With E13B Font Check Paper
Data that was read (lower line).
??????????? ????????????? ????T012345678T 9012345678900 1234
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10. Verify that the check was read correctly. You can continue running the test by inserting more checks.
11. When you have finished the test, turn off the power supply to the printer.
<Example Printing> With CMC7 Font Check Paper
Data that was read (lower line).
=0000066 =123456789012^ 210987654321/???????? ?????????????? ?????????????
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Troubleshooting Using the ERROR LEDYou can learn the cause of a failure by checking the ERROR LED code. The following table shows problems and solutions to repair the printer. Numbers in the "Solutions" column indicate the order to use to check the problem. If you cannot determine the cause of the problem after checking all the solutions listed, go back to the flowchart given earlier in this chapter.
Table1-2 Error causes and solutions
Type of Error and ERROR LED Pattern ExplanationSolutions (Listed in the order you should use to check printer)
Carriage home position detection error
The head carriage home position was not correctly detected.
1. Check the carriage assembly for paper jams. (To remove the carriage cover, see page 1-17.)
2. Check for paper dust on the H.P. detector assembly. (To remove the carriage cover, see page 1-17.)
3. Replace the H.P. detector assembly. (See page 2-22.)
Carriage out-of-step error There is no carriage detector output even when the carriage is instructed to move.
1. Check the carriage assembly for a paper jam. (To remove the carriage cover, see page 1-17.)
2. Check the rotary encoder on the carriage motor gear used to detect carriage position (The rotary encoder is on the intermediate circuit board assembly. You need to disassemble the intermediate circuit board assembly to check the encoder. To remove the intermediate circuit board assembly, see page 2-22.)
3. Check the carriage motor. (See page 1-11.) If the motor is shorted, replace it along with the main board.
4. Replace the main circuit board unit to see if the problem is fixed. (See page 2-86)
Slip eject error The slip paper was not ejected normally.
1. Look into the printer from the left side to check for a paper jam in the slip paper transport path.
2. Check the paper feed motor. (See page 1-11)If the motor is shorted, replace it along with the main board.
3. Replace the main circuit board unit to see if the printer is repaired. (See page 2-86)
Roll paper cover open error The roll paper cover (rear cover) was detected as open when printing.
Close the roll paper cover (rear cover).
Memory or gate array R/W error The R/W check did not operate properly for the memory or the gate array.
Replace the main circuit board unit to see if the printer is repaired. (See page 2-86.)
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High voltage error The power supply voltage is high.
Replace the power supply unit to see if the printer is repaired. (See page C-4.)
Low voltage error The power supply voltage is low
Replace the power supply unit to see if the printer is repaired. (See page C-4.)
CPU execution error An abnormal CPU operation was detected, or the I/F board is disconnected.
1. Check whether the I/F board is connected.
2. Replace the main circuit board unit to see if the printer is repaired. (See page 2-86.)
Drive circuit error One of the following was detected.
Print head thermistor detection error
Lever drive motor assembly error
1. Check if the printer is repaired after replacing the print head unit. (See page 1-17.)
2. Check the resistance of the lever drive motor assembly. (See page 1-11.) Replace if shorted.
3. Check if the printer is repaired after replacing the lever motor T. P. detector assembly. (See page 2-69.)
4. Check if the printer is repaired after replacing the main circuit board unit. (See page 2-86.)
Head high temperature error/roll paper error
One of the following problems has occurred.
The roll paper has been inserted into the path wrong.
The print head temperature is high.
1. If the error has occurred after loading the roll paper, the roll paper has been inserted into the path wrong. Reinstall the roll paper.
2. If the error occurred during printing, a high head temperature has been detected. This error may occur if you print continuously for too long. Leave the printer as it is. The error will be automatically cleared when the temperature has decreased. If this error occurs frequently, check if the ambient temperature is within specifications.
Table1-2 Error causes and solutions
Type of Error and ERROR LED Pattern ExplanationSolutions (Listed in the order you should use to check printer)
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Test Points on the Printer MechanismThis section shows how to test the motor and the coils.
Table1-3 Test points on the printer mechanism
Name of Mechanism Part Name Internal Element Function Where to Check Normal Status
Mechanism assembly (M-U675)
Lever drive coil A (left side when facing the front of the printer)
Coil • Form stopper operation• Slip paper roller (sub) operation
Remove the cable connector connected to CN30 on the main circuit board unit and test between pin 26 and pin 27.
Approx. 70 Ω
Lever drive coil B (right side when facing the front of the printer)
Coil • Platen open and close.• Cylindrical printer platen open and close
Remove the cable connector connected to CN30 on the main circuit board unit and test between pin 26 and pin 28.
Approx. 70 Ω
Carriage motor 4 phase stepping motor
Head carriage drive
Remove the cable connector connected to CN30 on the main circuit board unit and test between pin 1 and pin 2 and between pin 3 and pin 4.
Approx. 4.5 Ω (per 1 phase)
Lever drive motor assembly
DC brush motor • Form stopper operation• Slip paper roller (sub) operation• Platen open and close• Endorsement printer platen open and close
Remove the cable connector connected to CN30 on the main circuit board unit and test between pin 29 and pin 30.
The line must be continuous.
Paper feed motor
4 phase stepping motor
Slip paper feed Remove the cable connector connected to CN30 on the main circuit board unit and test between pin 17 and pin 18 and between pin 19 and pin 20.
Approx. 8 Ω (per 1 phase)
J/S change solenoid
Coil Change of journal paper drive/slip paper drive.
Remove the cable connector connected to CN30 on the main circuit board unit and test between pin 21 and pin 22 .
Approx. 45 Ω
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Mechanism assembly (M-U675)
MICR solenoid Coil MICR hold drive Remove the cable connector connected to CN27 on the main circuit board unit and test between pin 1 and pin 2 .
Approx. 28.8 Ω
Table1-3 Test points on the printer mechanism
Name of Mechanism Part Name Internal Element Function Where to Check Normal Status
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Test Points on the Main Circuit Board UnitPower Supply Line Check
After a main circuit board unit failure, one basic method for diagnosing the cause of the problem on the main circuit board unit is to check the power supply line. Use the following table to check the power supply line. First, check step number 1, and proceed to the next step if that is not the problem.
Table1-4 Checking the power supply line
Step # Type of Voltage
Location of Measurement
Condition of Measurement
Normal Value Presumed Cause of the Error
1 Voltage input from the power supply
CN29, pin 1 Output when the power supply is ON.
24 V ± 10 % It is possible that the problem is pre-arcing of the F1 fuse. The fuse may have pre-arced because of an unusual input circuit.
Always replace the fuse after removing the cause of the pre-arcing. If you do not remove the cause of the pre-arcing, and replace this fuse, the problem may expand to misoperation. Also, always use the specified type of fuse when replacing.
2 Voltage input from the power supply
U11, pin 1 Output when the power supply is ON.
24 V ± 10 % It is possible that the problem is pre-arcing of the R3 fuse. The fuse may have pre-arced because of a problem in the logic power supply circuit or because of a VCC over-voltage.
If pre-arcing of the R3 fuse happens, do not repair the main circuit board unit. The quality of several parts on the circuit board is weakened by pre-arcing of the R3 fuse and safe operation cannot be guaranteed.
3 Logic voltage (VCC)
VCC pad (near L2)
Output when the power supply is ON.
5 V ± 5 % It is possible that the logic power supply circuit has malfunctioned.
If you find this line has a problem, do not repair the main circuit board unit. The quality of several parts on the circuit board is weakened, and safe operation cannot be guaranteed.
4 Logic voltage(VCC-PWR)
VCC-PWR pad (near U14, pin 40)
Output when Q51 (C) is "0." (24V SW1="H")
5 V ± 5 % The logic power supply circuit or Q44 could have malfunctioned.
5 Logic voltage(VCC-PWR2)
U19, pin 8 potential
Output when Q60 (C) is "0." (24V SW2="H")
5 V ± 5 % The logic power supply circuit or Q59 could have malfunctioned.
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6 Logic voltage(VCC_SEN)
CN30, pin 5 potential
Output only when there is output sensor conductivity when CPU output port (SEN_PWR) is "L."
5 V ± 5 % The logic power supply circuit or Q44 could have malfunctioned.
7 Mechanism voltage (24 VA)
Located near Q17 drain
Output when Q24 (C) is "0." (24V SW2 = "H")
24 V ± 10 % Q17 could have malfunctioned.
8 Mechanism voltage (24 VB)
Located near Q7 source
Only output continuously when power supply unit is connected.
24 V ± 10 % TH1 could have malfunctioned.
9 Mechanism voltage (24C)
Located near Q29 base
Output when Q46 (C) is "0." (24V SW1="H")
24 V ± 10 % It is possible that the problem is pre-arcing of the F2 fuse. The fuse may have pre-arced because of a defect in the 24V line circuit elements.
If pre-arcing of the F2 fuse happens, do not repair the main circuit board unit. The quality of several parts on the circuit board is weakened by pre-arcing of the F2 fuse, and safe operation cannot be guaranteed.
Table1-4 Checking the power supply line
Step # Type of Voltage
Location of Measurement
Condition of Measurement
Normal Value Presumed Cause of the Error
1-14 Troubleshooting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Locations of the Main Elements on the Main Circuit Board UnitThe following shows the locations of the main elements on the main circuit board unit.
Figure 1-4 Locations of the main elements on the main circuit board unit
Fuse (F1)
Fuse (F2)
Fuse (F3)
*Rear side
Fuse (F4)Fuse (R3)
CPU (U3)
Gate array (U30)*under the memory board
Carriage motor controller (U14)
Slip paper feed motor controller (U17)
Impact dot head drivers (QM3)
Impact dot head drivers (QM6)
Memory board
Font ROM (U513)Program ROM (U508)SRAM (U509)
Rev. B Troubleshooting 1-15
Confidential
Procedures for Replacing the Print Head Unit
Follow the steps below to replace the print head unit.
1. Turn off the power switch to the printer. Remove the power supply unit from the printer.
2. Open the printer front cover and remove the ribbon cartridge.
Figure 1-5 Removing the ribbon cartridge
3. Pull the cable connector out of the slit in the case.
Figure 1-6 Pulling the cable connector out
When you are reattaching the cable, arrange the cable wires as shown below.
Figure 1-7 Arranging the cable wires
1-16 Troubleshooting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
4. Remove the two screws and remove the carriage cover frame assembly.Figure 1-8 Removing the carriage cover frame assembly
When you are reattaching the frame, insert the tooth on the left side into the shaft and align the nib on the right side with the nib hole.
Figure 1-9 Tooth and nib
screw
screw
tooth
nib
Rev. B Troubleshooting 1-17
Confidential
5. Move the head carriage to the right side and remove the print head unit flexible plastic cable(FPC) from the connector.
Figure 1-10 Removing the print head unit FPC
6. Remove the screw and remove the print head unit.
Figure 1-11 Removing the print head unit
When attaching, pass the print head unit FPC through the slit in the head carriage and attach below the two nibs.
Figure 1-12 Slit and two nibs
two nibsslit
1-18 Troubleshooting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
7. Remove the nose guide from the print head unit.Figure 1-13 Removing the nose guide
8. To reinstall the print head, reverse the procedures you used to remove it. When reinstalling, affix the head seal to the print head unit.
Figure 1-14
nose guide
print head unit
head seal
Rev. B Troubleshooting 1-19
Confidential
Removing Paper Jams
Paper Jams in the Roll Paper
1. Pull the latch lever to the front and open the roll paper cover.
2. Remove the take-up assembly.
3. Open the clamshell mechanism while pushing on the levers on both ends.
Figure 1-15
4. Remove the paper.
5. Close the clamshell mechanism. Push on the clamshell mechanism until you hear a clicking sound.
6. Close the roll paper cover.
Paper Jams in the Slip Paper
1. Check that the power to the printer is turned ON. If it is not ON, turn it ON.
2. If the slip paper does not release, press the RELEASE button to free the slip paper.
3. Remove paper from the paper insertion side.
If you cannot remove the paper from the paper insertion side, or paper is cut partially while you are removing it, follow the directions in the previous section entitled “Paper Jams in the Roll Paper” to open the clamshell mechanism and remove the paper.
levers
1-20 Troubleshooting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Detector Functions and PositionsThe following shows the positions and the functions of the detectors.
*The roll paper near-end detector mechanism is installed in the paper supply unit.
Figure 1-16
Table1-5 Detectors and functions
Mechanism Function
Home position detection mechanism
Initial setting of printer (carriage home position)
Carriage detection mechanism Detection of head carriage malfunction
B.O.F. detection mechanism Slip detection
T.O.F. detection mechanism Slip detection
Paper ejection detection mechanism
Slip detection
Roll paper end detection mechanism
Roll paper detection
*Roll paper near-enddetection mechanism
Roll paper detection
Validation detector mechanism Validation paper detection
Lever motor T.P. detection mechanism
Lever drive motor timing signal detection
Front cover detection mechanism Front cover open/closed status detection
Rear cover detection mechanism Detects the open/close status of the rear cover
N.E. detector(Micro switch)
Rear cover detector assembly
Paper ejection detector assembly
Front cover detector assembly
H. P. detectorassembly
Lever motor T.P. detectorassembly
Validation detector assembly
Carriage detectorassembly
Slip T.O.F. detectorassembly
Slip B.O.F. detectorassembly
Paper end detector assembly
Rev. B Troubleshooting 1-21
Confidential
1-22 Troubleshooting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Chapter 2Assembly and Disassembly
Before Assembly and Disassembly
Always observe the following precautions when disassembling and assembling the printer.
CAUTION:Always remove the power supply unit from the printer before working. Power is flowing in the internal circuit board even if you turn the printer off with the power supply switch. You can damage the printer if you work with the power supply still attached.
Remove all peripheral equipment connected to the printer before starting your work.
Do not perform any work that is not described in this chapter. Doing so can result in injuries or damage to the printer.
Do not touch the FPC or the FFC pins with your hands.
About this Chapter
Procedures
This chapter provides the procedures for assembling. Reverse them to disassemble the printer.
Assembly is organized into “Assembling the Mechanism Assembly (M-U675),” and “Assembling the TM-U675.” Each section is further divided into “Pre-assembly” and “Assembly.”
Do “Pre-assembly” steps first, and then do “Assembly” after you have assembled the parts into units to some degree.
Rev. B Assembly and Disassembly 2-1
Confidential
Assembling the Mechanism Assembly (M-U675)
Pre-assembly Procedures
Pre-assembly of the Validation Detector Assembly
1. Solder lead wires S, T, R to the validation circuit board.
Figure 2-1
697 Validation detector assembly
757 Lead wire (type R)758 Lead wire (type S)759 Lead wire (type T)
2-2 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Pre-assembly of the Slip B.O.F. Detector Assembly
1. Solder lead wires C, D, E to the slip B. O. F. detector assembly.
2. Insert the slip B. O. F. detector assembly into the slip insertion detector holder.
Figure 2-2
606 Slip insertion detector holder
696 Slip B.O.F. detector assembly
742 Lead wire (type C)743 Lead wire (type D)744 Lead wire (type E)
Rev. B Assembly and Disassembly 2-3
Confidential
Pre-assembly of the Lever Drive Coil Assembly1. Attach lever drive coils (type A, B) to the lever coil mounting plate sub assembly. The rack for lever drive coil (type A, B) should face upward. Do not confuse type A and B. Type A uses brown lead wires. Type B uses gray lead wires.
2. Assemble the paper feed trigger attraction plates to the lever drive coils (type A, B).
3. Hook paper feed trigger claw springs onto the lever coil mounting plate sub assembly and paper feed trigger attraction plate. One side of the hook on the paper feed trigger claw spring is single and the other side is double. Attach the double side onto the paper feed trigger attraction plate.
4. Lubricate the areas where the paper feed trigger attraction plate contacts other parts (eight places).
Figure 2-3
G-36
G-36
G-36
732 Paper feed trigger attraction plate
732 Paper feed trigger attraction plate
621 Lever drive coil (type A)
622 Lever drive coil (type B)731
Paper feed trigger claw spring
731 Paper feed trigger claw spring
695 Lever coil mounting plate sub assembly
2-4 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Pre-assembly of the Paper Feed Motor
Note:Perform the following three steps only if your printer has a MICR unit.
1. Insert the paper feed motor into the motor shield case. Insert the paper feed motor gear into the hole in the motor shield case. Check that the motor printed circuit board (PCB) fits into the notch.
2. Insert two motor shield spacers into the motor shield case.
3. Attach the motor shield cover onto the motor shield case (two places). Align the screw holes and the nibs on the opposite side, and push in so that they snap fit.
Figure 2-4
781 Motor shield cover
725 Screw (C.C.S-tite, 2.5X5)
739 Paper feed motor
780 Motor shield case
779 Motor shield spacer
726 Screw (C.B.S-tite F, 3X6)
Rev. B Assembly and Disassembly 2-5
Confidential
Pre-assembly of the J/S Change Solenoid Assembly1. Attach the J/S change solenoid to the J/S solenoid mounting plate. When doing so, tighten the screw while the J/S change solenoid is touching the nib on the right side of the J/S solenoid mounting plate.
2. Attach the J/S change lever to the J/S solenoid mounting plate, and hook the J/S change spring.
3. Lubricate the sliding part of the J/S change solenoid mounting plate and the J/S change lever in four places.
Figure 2-5
651 J/S change spring
716 Screw (C.C., 2X3)
727 J/S change solenoid774
J/S solenoid mounting plate
650 J/S change lever
G-36
G-36
2-6 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Pre-assembly of the Slip T. O. F. Detector Assembly
1. Solder lead wires I, J, K to the slip T. O. F. detector assembly.
Figure 2-6
703 Slip T.O.F. detector assembly748 Lead wire (type I)749 Lead wire (type J)750 Lead wire (type K)
Rev. B Assembly and Disassembly 2-7
Confidential
Pre-assembly of the Lever Motor T. P. Detector Assembly1. Solder lead wires F, G, H to the lever motor T. P. detector assembly.
Figure 2-7
745 Lead wire (type F)746 Lead wire (type G)747 Lead wire (type H)
704 Lever motor T.P. detector assembly
2-8 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Pre-assembly of the MICR Unit
Note:Perform the following 16 steps only if your printer has a MICR unit.
1. Solder the MICR connector assembly lead wires to the MICR head.
2. Align the MICR frame and MICR head with the nib and attach with one screw.
Figure 2-8
782 MICR assembly
786 MICR connector assembly
792 MICR frame assembly
793 Screw (C.P.(S-P2), 2.5X5)
Rev. B Assembly and Disassembly 2-9
Confidential
3. Attach the MICR fixing sheet to the MICR fixing. Set the hole on the MICR fixing sheet overthe MICR fixing nib and attach so that the MICR fixing sheet does not protrude from the MICR fixing.
4. Attach the MICR fixing to the MICR lever. The tabs on the MICR fixing should fit into the MICR grooves.
5. Assemble by inserting the MICR roller shaft. (Attach the shaft with one E-ring.)
Figure 2-9
777 MICR roller shaft
Hole
Nibs
TabsLooking directly from the bottom
778 E-ring (1.2)
787 MICR lever
791 MICR fixing sheet
788 MICR fixing
2-10 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
6. Insert the two MICR lever guide shafts into the MICR frame, starting with the end with thesmaller diameter.
7. Lubricate the areas where the MICR lever and the MICR frame are in contact (six places).
8. Attach the MICR frame to the MICR lever as shown in the drawing.
Figure 2-10
G-47
G-47
G-47
796 MICR lever guide shaft
792 MICR frame assembly
787 MICR lever
Rev. B Assembly and Disassembly 2-11
Confidential
9. Fit the MICR solenoid into the MICR case.10. Align and fit the MICR solenoid nib into the MICR frame assembly.
11. Position and attach the MICR lever fixing plate to the MICR lever nib. (Use two screws to attach.)
Note:Tighten the screws while holding the MICR solenoid. Check that the MICR lever will fall under its own weight.
Figure 2-11
783 MICR case
789 MICR solenoid
784 MICR lever fixing plate
794 Screw (C.P.(S), 2.6X8)
2-12 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
12. Insert to attach the MICR roller shaft from the opposite direction of the MICR lever fixingplate. Attach with one E-ring.
13. Attach the MICR lever spring on the hooks.
14. Check that opening and closing the MICR head assembly has a clicking feel to it.
15. Insert the MICR shield cover into the three slits in the MICR frame.
16. Hook the MICR connector assembly lead wire to the hook on the MICR frame.
Figure 2-12
785 MICR shield cover (type A)
790 MICR lever spring
777 MICR roller shaft
778 E-ring (1.2)
Rev. B Assembly and Disassembly 2-13
Confidential
Pre-assembly of the Carriage Frame Unit1. Lubricate the carriage motor shaft.
2. Insert the carriage drive pulley into the carriage motor shaft.
3. Lubricate the inside of the carriage drive pulley.
4. Attach the belt drive cap to the carriage drive pulley and secure it with one E-ring. Place the belt drive cap with flat surface face up to install it.
Figure 2-13
720 E-ring (2)
603 Belt drive cap
633 Carriage drive pulley
733 Carriage motor
G-36
G-36
2-14 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Pre-assembly of the Carriage Assembly
1. Insert the oil rings into the carriage assembly and lubricate. When doing so, insert the flat surface of the oil rings so that they are facing up and down.
2. Hook the carriage spring to the carriage assembly. Push in until you feel the carriage spring click.
Figure 2-14
O-10
O-10
611 Carriage spring
Rounded side
709 Carriage assembly
605 Oil ring
Rev. B Assembly and Disassembly 2-15
Confidential
3. Insert the carriage belt into the carriage assembly. Fit the belt along the grooves in thebottom side of the carriage assembly. For the direction of the belt, see the illustration below.
Figure 2-15
629 Carriage belt
2-16 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Pre-assembly of the H. P. Detector Assembly
1. Solder lead wires L, M, N in that order to the H. P. detector assembly.
Figure 2-16
707 H.P. detector assembly
753 Lead wire (type N)
751 Lead wire (type L)752 Lead wire (type M)
Rev. B Assembly and Disassembly 2-17
Confidential
Pre-assembly of the Carriage Frame1. Lubricate five shafts on the carriage frame sub assembly.
2. Insert the ribbon feed spring into the shaft shown in the figure below. Set the ribbon feed spring claw upward and insert all the way by rotating the ribbon feed spring clockwise.
3. Lubricate the surface of the ribbon feed spring.
4. Attach the ribbon take-up gear assembly to the top of the ribbon feed spring. Align the ribbon feed spring claw and the ribbon take-up gear assembly and insert.
5. Attach the carriage transmission pulley to the shaft shown in the figure below.
6. Apply lubrication to the hole in the carriage transmission pulley.
7. Attach the belt drive cap. Place the belt drive cap with the flat surface face up to install it.
Figure 2-17
G-36
G-36
G-36
G-36
712 Ribbon take-up gear assembly
601 Ribbon feed
spring
603 Belt drive cap
632 Carriage transmission pulley
Carriage frame sub assembly
2-18 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
8. Insert the carriage drive transmission gear into the shaft shown in the figure below.9. Insert the ribbon reduction gear into the shaft shown in the figure below.
10. Insert the ribbon intermediate gear into the shaft shown in the figure below. The smaller diameter ribbon intermediate gear should be on the lower side.
11. Attach the ribbon drive plate assembly above the ribbon reduction gear and the ribbon intermediate gear. Set the gear side of the ribbon drive plate assembly downward.
12. Attach the gear train cover to the carriage drive transmission gear.
13. Fasten the belt drive cap, carriage drive transmission gear, and ribbon drive plate assembly with three E-rings.
Figure 2-18
720 E-ring (2)
720 E-ring (2)
706 Ribbon drive plate assembly
634 Carriage drive transmission gear
768 Gear train cover
682 Ribbon reduction gear
683 Ribbon intermediate gear
720 E-ring (2)
Carriage frame sub assembly
Rev. B Assembly and Disassembly 2-19
Confidential
14. Insert the hole in the carriage motor onto the carriage frame sub assembly nib. Temporarilyfasten the screw on the lead wire side.
15. Loosen the screw you temporarily tightened in the previous step (less than one turn).
16. Hook the belt tension spring on the carriage motor and carriage frame sub assembly.
Figure 2-19
775 Screw (C.P.S-tite(P4), 3x6)
733 Carriage motor
Nib
Carriage frame sub assembly
630 Belt tension spring
2-20 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
17. Attach the carriage assembly to the carriage frame sub assembly. When doing so, set thecarriage spring under the bent part on the carriage frame sub assembly as shown in the illustration. Insert the carriage guide shaft and secure it with one E-ring.
18. Lubricate the right and left sides of the carriage guide shaft.
19. Hook the carriage belt onto the carriage drive pulley (shown with “1” in the illustration) and carriage transmission pulley (shown with “2” in the illustration) in that order.
20. Tighten the screw (the screw loosened in step 15) on the lead wire side of the carriage motor.
21. Secure another screw to firmly tighten the carriage motor.
Figure 2-20
O-10
O-10
688 Carriage frame sub assembly
688 Carriage frame sub assembly
611 Carriage spring
709 Carriage assembly
723 E-ring (5)
631 Carriage guide shaft
1
2
775 Screw (C.P.S-tite(P4), 3x6)
Rev. B Assembly and Disassembly 2-21
Confidential
22. Align the intermediate circuit board assembly to the carriage frame sub assembly with twodowels, and attach the intermediate circuit board cover.
23. Tighten the intermediate circuit board assembly and intermediate circuit board cover together with two screws.
24. Attach the H. P. detector assembly to the carriage frame sub assembly with one screw. Pass the H. P. detector assembly lead wires to the bottom through the hole in the carriage frame sub assembly.
Figure 2-21
775 Screw (C.P.S-tite(P4), 3x6)
775 Screw (C.P.S-tite(P4), 3x6)
769 Intermediate circuit board cover
708 Intermediate circuit board assembly
775 Screw (C.P.S-tite(P4), 3x6)
707 H.P. detector assembly
688 Carriage frame sub assembly
2-22 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
25. Pass the flexible plastic cable (FPC) for the print head unit (Eb) through the slit in thecarriage assembly. When you do this, the FPC should be below the two hooks on the carriage assembly. Install the print head unit (Eb) onto the carriage assembly. Connect the FPC to the intermediate circuit board assembly connector.
26. Attach the nose guide on the print head unit (Eb) while aligning the three nibs. Secure the nose guide with one screw.
27. Attach the head seal to the print head unit (Eb).
28. Lubricate the carriage motor gear and the top of the E-ring fastening the ribbon drive plate assembly.
Figure 2-22
Figure 2-23
608 Screw (C.P.P-tite, 3X12)623
Nose guide
689 Print head unit (Eb)
FPC
Slit Hooks
G-36
G-36
FPC
795Head seal
689 Print head unit (Eb)
FPC 709 Carriage assembly
688 Carriage frame sub assembly 708
Intermediate circuit board assembly
Rev. B Assembly and Disassembly 2-23
Confidential
29. Solder four carriage motor cables and three H. P. detector assembly cables to theintermediate circuit board assembly.
30. Solder intermediate cables A, B, C to the intermediate circuit board assembly.
31. Cover intermediate cables A, B, C with the intermediate cable tube. Fold the intermediate cables A, B, C to the right side.
Figure 2-24
771 Intermediate cable tube
Three cablesfor H.P. detectorassembly
Four cablesfor motor carriage
734 Intermediate cable (type A)735 Intermediate cable (type B)736 Intermediate cable (type C)
708 Intermediate circuit board assembly
2-24 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Pre-assembly of the Front Cover Detector Assembly
1. Solder lead wires V, U, W in that order to the front cover detector assembly.
Figure 2-25
760 Lead wire (type U)761 Lead wire (type V)
762 Lead wire (type W)
691 Front cover detector assembly
Rev. B Assembly and Disassembly 2-25
Confidential
Pre-assembly of the Rear Cover Detector Assembly1. Solder lead wires X, Y, Z to the cover detector circuit board.
Figure 2-26
692 Rear cover detector assembly
764 Lead wire (type Y)763 Lead wire (type X)
765 Lead wire (type Z)
2-26 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Pre-assembly of the Paper End Detector Assembly
1. Solder lead wires O, P, Q to the paper end detector circuit board.
Figure 2-27
710 Paper end detector assembly
756 Lead wire (type Q)755 Lead wire (type P)754 Lead wire (type O)
Rev. B Assembly and Disassembly 2-27
Confidential
Pre-assembly of the Assist Paper Guide Assembly1. Attach the backup paper guide cap to the center of the assist paper guide.
2. Attach the paper hold roller and assist paper guide spring to the assist paper guide. When doing so, attach the assist paper guide spring in the direction shown in the figure.
3. Pass the paper hold roller shaft through the assist paper guide and fasten C-rings in 2 places.
4. Lubricate the center of the hole in the paper hold roller.
Figure 2-28
678 Backup paper guide cap
642 Paper hold roller shaft
664 Assist paper guide
772 C-ring (5103-21)
665 Paper hold roller 772 C-ring (5103-21)
653 Assist paper guide spring
G-36
2-28 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Paper feed frame assembly
1. Insert the paper guide lever and the sub paper hold roller into the paper feed frame assembly.
2. Pass the sub paper hold roller shaft into the paper feed frame assembly and sub paper hold roller. (E-ring, 1 place)
3. Attach the paper guide lever spring and paper ejection detector holder to the paper guide lever with one E-ring. Attach the paper guide lever spring in the direction shown in the figure.
Figure 2-29
663 Sub paper hold roller
658 Paper guide lever
652 Paper guide lever spring
724 E-ring (2.3)
724 E-ring (2.3)
698 Paper feed frame assembly
640 Sub paper hold roller shaft
639 Paper guide lever shaft
Rev. B Assembly and Disassembly 2-29
Confidential
4. Attach the sub paper feed roller assembly and the crank shaft holders to the paper feedframe assembly.
5. Lubricate the areas where the sub paper feed roller assembly and the crank shaft holder are in contact.
6. Attach the parallel pin and paper feed gear to the sub paper feed shaft with two E-rings.
Figure 2-30
722 E-ring (4)
730 Crank shaftholder
699 Sub paper feed roller assembly
699 Sub paper feed roller assembly
730 Crank shaft holder
602 Parallel pin (1.6X10)
602
648 Paper feed gear
722 E-ring (4)
G-48
G-48
2-30 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
7. Hook the paper guide lever spring to the paper guide lever and paper feed frame. Insert thetip of the short side of the spring into the lever groove, and bend the spring to hook the tip of the long side on the inside in the gap in the frame.
Figure 2-31
658 Paper guide lever652 Paper guide lever spring
698 Paper feed frame assembly
Rev. B Assembly and Disassembly 2-31
Confidential
8. Snap-fit the paper feed frame assembly to the paper end detector to attach.Figure 2-32
710 Paper end detector assembly
2-32 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
9. Attach the paper feed roller to the paper feed frame assembly.10. Attach the crank shaft holder, parallel pin, and the paper feed gear to the paper feed roller with two E-rings.
11. Lubricate the sliding parts of the paper feed roller and crank shaft holder.
12. Attach the paper feed gear to the axis shown in the figure for the paper feed frame assembly with one E-ring.
Figure 2-33
666 Paper feed roller
722 E-ring (4)730 Crank shaft holder
648 Paper feed gear
648 Paper feed gear
722 E-ring (4)
722 E-ring (4)
602
G-48
G-48
666 Paper feed roller
602 Parallel pin (1.6X10)
730 Crank shaft holder
Rev. B Assembly and Disassembly 2-33
Confidential
13. Attach the assist paper guide to the paper feed frame assembly using the paper feed rollersprings.
14. Set the hooks for the paper feed roller springs into the grooves for the shaft and hang the loop of the spring onto the protrusion on the paper feed frame assembly. Be careful of the direction of the attachment of the spring.
Figure 2-34
654 Paper feed roller spring
654 Paper feed roller spring
2-34 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
15. Insert the slip feed roller holder into the slip feed roller.16. Attach the slip feed roller to the platen lever assembly with one E-ring. Insert the pin-shaped nib of the slip feed roller holder into the third hole from the left on the platen lever assembly.
17. Push the slip drive gear into the slip feed roller from the side with the larger diameter.
18. Apply lubrication to both sides of the slip feed roller and the slip feed roller holder. Rotate the roller several times to allow the oil to work its way completely around.
Figure 2-35
G-48
G-48
72 E-ring (3)
668 Slip feed roller
668
659 Slip feed roller holder
624 Platen lever assembly
649 Slip drive gear
Rev. B Assembly and Disassembly 2-35
Confidential
19. Insert the nylon lock nut (M3) onto the platen lever assembly on the side where the platenground plate (type A) is to be attached. The rounded side of the nylon lock nut (M3) should be facing the direction shown in the illustration.
20. Insert the platen ground plate (type A) into the platen lever assembly.
21. Insert the two platen springs into the platen lever assembly.
22. Insert another nylon lock nut (M3).
23. Attach the platen assembly to the platen lever assembly. Secure the two platen adjustment screws.
24. Attach the slip paper guide to the platen lever assembly. Hang the slip paper guide on the hooks in three places on the platen lever assembly and fit the 2 nibs.
Figure 2-36
685 Platen adjustment screw
711 Platen assembly
685 Platen adjustment screw
718 Nylon lock nut
604 Platen spring
604Platen spring
670 Slip paper guide
674 Platen groundplate (type A)
718 Nylon lock nut
2-36 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
25. Attach the platen lever assembly, platen ground plate B, and the platen lever spring to thepaper feed frame assembly. Insert the platen lever spring onto the cross-shaped protrusion on the paper feed frame, and insert the other end onto the protrusion on the platen lever assembly.
26. Insert the left and right platen lever shafts into the holes in the platen lever assembly and attach with two E-rings.
Figure 2-37
626 Left platen lever shaft
721 E-ring (3)
721 E-ring (3)
625 Platen lever spring 675
Platen ground plate (type B)
727 J/S change solenoid
Rev. B Assembly and Disassembly 2-37
Confidential
27. Insert the lead wires for the paper end detector assembly in their specified positions.Figure 2-38
2-38 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
28. Attach the cover ground plate to the paper feed frame assembly.29. Cover the paper feed frame assembly using the paper feed cover and tighten the two plate assembly lever screws.
30. Hang the assist paper guide spring onto the paper feed frame cover. Check the operation of the assist paper guide.
31. Insert the paper release lever into the platen lever assembly and attach to the release lever shaft with one E-ring.
32. Attach the guide roller shaft and sub paper hold roller to the paper feed frame assembly with two E-rings.
Figure 2-39
609 Screw (C.B.P-tite, 3X6)
676 Cover ground plate
669 Paper feed frame cover
609 Screw (C.B.P-tite, 3X6)
641 Guide roller shaft
720 E-ring (2)
663 Sub paper hold roller
719 E-ring (1.5)
657 Paper release lever
638 Release lever shaft
720 E-ring (2) 663 Sub paper hold roller
Rev. B Assembly and Disassembly 2-39
Confidential
33. With one E-ring, attach the paper feed frame fixing L lever assembly and the paper feedframe fixing lever spring to the paper feed release assembly. Hang the spring onto the paper feed frame fixing L lever assembly and hang onto the protrusion on the paper feed frame so that it passes below the cover ground plate.
34. With one E-ring, attach the paper feed frame fixing R lever assembly and the paper feed frame fixing lever spring to the paper feed release assembly. Hang the spring onto the paper feed frame fixing R lever assembly and hang the spring onto the protrusion of the paper feed frame assembly.
Figure 2-40
701 Paper feed frame fixing L lever assembly
655 Paper feed frame fixing
lever spring
702 Paper feedframe fixing R lever assembly
655 Paper feedframe fixinglever spring
722 E-ring (4)
722 E-ring (4)
2-40 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
35. Attach the parallel pin and paper feed gear to the paper feed roller with one E-ring.Figure 2-41
648 Paper feed gear
722 E-ring (4)
602 Parallel pin (1.6X10)
602
Rev. B Assembly and Disassembly 2-41
Confidential
Pre-assembly of the Carriage Cover Frame Assembly1. Solder the paper ejection detector cable assembly (type B) to the paper ejection detector assembly. After soldering, pass the cables through the slit in the paper ejection detector assembly.
Figure 2-42
690 Paper ejection detector assembly
738 Paper ejection detector cable (type B) assembly
Slit
2-42 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
2. Attach the paper ejection detector assembly and the paper ejection detector holder. Thensecure them with one screw.
3. Route the paper ejection detector cable assembly (type B) as shown in the illustration.
Figure 2-43
609 Screw (C.B.P-tite, 3X6)
635 Paper ejection detector holder
690 Paper ejection detector assembly
738 Paper ejection detector cable (type B) assembly
Rev. B Assembly and Disassembly 2-43
Confidential
4. Hook the paper ejection detector cable assembly (type B) onto the hooks on the carriagecover frame assembly. Check the starting position for inserting the cable.
5. Attach the paper ejection detector assembly to the carriage cover frame assembly with one screw.
Figure 2-44
725 Screw (C.C.S-tite, 2.5X5)
635 Paper ejection detector holder
713 Carriage cover frame assembly
738 Paper ejection detector cable (type B) assembly
2-44 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Pre-assembly of the Lever Drive Motor Assembly
1. Solder the lead wires A, B to the lever drive motor assembly. Solder lead wire (type A) (red) to the terminal on the side where the label is affixed.
Figure 2-45
740 Lead wire (type A)
741 Lead wire (type B)
686 Lever drive motor assembly
Label
Rev. B Assembly and Disassembly 2-45
Confidential
Assembly of the Mechanism
1. Tighten two screws on the front of the main frame.
2. Attach the lever drive motor assembly to the main frame with two screws. Install so that the label side of the lever drive assembly motor is facing the back.
Figure 2-46
726 Screw (C.B.S-tite F, 3X6)
Main frame
686 Lever drive motor assembly773 Screw (C.B., 2.6X4)
726 Screw (C.B.S-tite F, 3X6)
2-46 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
3. Attach the sub slip feed roller holder to the farthest right hole in the sub slip feed lever subassembly with one screw.
Figure 2-47
687 Sub slip feed lever sub assembly
660 Sub slip feed roller holder
725 Screw (C.C.S-tite, 2.5X5)
Rev. B Assembly and Disassembly 2-47
Confidential
4. Attach the sub slip feed lever spring to the main frame.5. Attach the sub slip feed lever sub assembly to the main frame. Insert the sub slip feed lever shaft from left side and fasten it with one E-ring.
Figure 2-48
644 Sub slip feed lever shaft
656 Sub slip feed lever spring
Main frame
719 E-ring (1.5)
687 Sub slip feed lever sub assembly
2-48 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
6. Install the form stopper into the main frame, and attach the form stopper shaft with one E-ring. Insert the form stopper shaft from the outer side of the main frame.
7. Hook the form stopper spring to the main frame and form stopper rack.
Figure 2-49
620 Form stopper spring
620
719 E-ring (1.5)
618 Form stopper
618
619 Form stopper shaft
656 Sub slip feed lever spring
Main frame
Rev. B Assembly and Disassembly 2-49
Confidential
8. Attach the lever drive shaft assembly to the main frame. Insert the D cut side of the leverdrive shaft assembly to the left and attach to the main frame.
9. Insert the crank shaft holders from the left and right outer sides and attach with one E-ring.
Figure 2-50
730 Crank shaft holder
730 Crank shaft holder
693 Lever drive shaft assembly
723 E-ring (5)
2-50 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
10. Press the lever drive shaft gear into the lever drive shaft assembly.11. Assemble the sub slip feed roller assembly into the main frame.
12. Press the slip drive gear onto the sub slip feed roller assembly. Press in starting from the slip drive gear whose diameter is larger. (See the illustration below.)
Figure 2-51
649 Slip drive gear
694 Sub slip feed roller assembly
617 Lever drive shaft gear
Main frame
Rev. B Assembly and Disassembly 2-51
Confidential
13. Snap fit the lever drive motor detector plate to the gear on the lever drive motor assembly.When doing so, align the rib on the gear and attach.
14. Lubricate the shaft to which the lever motor reduction gear is attached.
15. Use one E-ring to attach the lever motor reduction gear to the shaft. The arrow on the lever motor reduction gear should be facing the outside.
Figure 2-52
G-36
Rib
724 E-ring (2.3)
615 Lever motor
reduction gear
614 Lever drive
motor detector plate
2-52 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
16. Lubricate the inside of the sub slip feed lever shaft in two places.17. Lubricate the sub slip feed roller holder.
18. Lubricate the form stopper shaft rotating unit in two places.
19. Lubricate the main frame and sub slip feed roller where they contact.
20. Lubricate the form stopper and sub slip feed lever sub assembly shaft where they contact.
21. Lubricate the cam on the lever drive shaft assembly.
Note:Apply G-48 grease from step 16 to 20 but apply G-36 to the cam in step 21.
Figure 2-53
G-48
G-36G-48
G-48
G-48
G-48
G-48
Step 20
Step 21Step 18
Step 19
Step 16
Step 17
Step 19
Rev. B Assembly and Disassembly 2-53
Confidential
22. Attach the validation detector assembly to the slip guide lower frame with one screw.Note:The parts used and the shape of the slip guide lower frame will vary based on the specifications. Use only the one that matches your configuration.
23. Attach the validation stopper and validation stopper spring to the slip guide lower frame.
24. Hook the cable line of the slip B.O.F. detector assembly to the slip guide lower frame.
Figure 2-54
662 Slip guide lower frame
662
673 Validation stopper spring
696 Slip B.O.F. detector assembly
673
672
672 Validation stopper
609 Screw (C.B.P-tite, 3X6)
697 Validation detector assembly
2-54 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
25. Attach the slip guide lower frame to the main frame using two screws. When doing so, passthe cable wire on the slip B.O.F. detector assembly through the hole in the main frame.
Figure 2-55
726 Screw (C.B.S-tite F, 3X6)
Main frame
Hole
Rev. B Assembly and Disassembly 2-55
Confidential
26. Insert the sub slip hold sleeve onto both ends of the shaft for the sub slip hold rollers.27. Temporarily attach the front frame and the slip guide upper frame. When doing so, align the nibs shown in the illustration with the nib holes.
28. Temporarily attach the sub slip hold roller so that the D cut side is on the right side.
Figure 2-56
661 Slip guide upper frame
667 Sub slip hold roller
613 Front frame
770 Sub sliphold sleeve
770 Sub slip hold sleeve
Nib
Nib
Hole
Hole
2-56 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
29. Attach the slip guide upper frame to the slip guide lower frame. When doing so, align thenibs and the claw shown in the illustration with the corresponding holes and slit.
Figure 2-57
661 Slip guide upper frame
Claw
Nibs
Nib
Nibs
662 Slip guide lower frame (type B)
Rev. B Assembly and Disassembly 2-57
Confidential
30. While aligning the three nibs shown in the illustration, attach the front reinforcement frameto the front frame and secure them with six screws. When doing so, make sure the nibs and claw you aligned in the previous step (step 29) are still aligned.
31. Tighten the two screws to secure the slip guide upper frame.
32. Attach the endorsement platen shutter to the slip guide upper frame.
Figure 2-58
612 Front reinforcement
frame
726Screw (C.B.S-tite F, 3X6)
726 Screw (C.B.S-tite F, 3X6)
680 Endorsement platen shutter
Nibs
2-58 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
33. Insert the slip hold roller spring onto the slip hold roller shaft from the D cut side.34. Insert the slip hold roller sleeve onto the slip hold roller shaft from the D cut side.
35. Insert the two slip feed roller shaft holders onto the slip hold roller shaft with the flange facing inward.
Figure 2-59
610 Slip feed roller shaft holder
645 Slip hold roller shaft
610 Slip feed roller shaft holder
766 Slip hold roller sleeve
767 Slip hold roller spring
Rev. B Assembly and Disassembly 2-59
Confidential
36. Attach the slip hold roller shaft to the main frame in the order shown in the illustration.Align the D cut portions of the slip feed roller shaft holder with the cutouts in the main frame.
Figure 2-60
PUSH
1
23
2-60 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
37. Attach the slip feed roller shaft holders to both sides of the sub slip hold roller starting fromthe small diameter. Secure the holders with two E-rings.
38. Push the slip drive gear into the slip hold roller shaft starting from the side whose diameter is larger.
39. Press the slip drive gear into the sub slip hold roller starting from the larger diameter.
Figure 2-61
721 E-ring (3)
610 Slip feed rollershaft holder
721 E-ring (3)610 Slip feed roller shaft holder
649 Slip drive gear
649 Slip drive gear
Rev. B Assembly and Disassembly 2-61
Confidential
40. Insert three slip transmission gears onto the shafts on the main frame.41. Insert the paper feed reduction gear onto the shaft on the main frame starting from the gear whose diameter is smaller.
Figure 2-62
729 Paper feed reduction gear
647 Slip transmissiongears
647 Slip transmission gear
2-62 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
42. Lubricate the shaft shown in the figure.43. Inset the J/S change gear onto the shaft shown in the figure.
44. Insert the paper feed reduction gear into the shaft shown in the figure with the gear whose diameter is largest in.
45. Insert the take-up drive gear into the shaft shown in the figure.
46. Insert the paper feed transmission gear into the shaft shown in the figure.
47. Attach the gears with four E-rings (3).
Figure 2-63
646 Take-up drive gear
721 E-ring (3)
721 E-ring (3)721 E-rings (3)
728 J/S change gear
637 Paper feed transmission gear
721 E-ring (3)
G-36
729 Paper feed reduction gear
Rev. B Assembly and Disassembly 2-63
Confidential
48. Attach the lever drive coil assembly to the slip guide lower frame with two screws.Figure 2-64
609 Screw (C.B.P-tite, 3X6)
Lever drive coil assembly609 Screw (C.B.P-tite, 3X6)
2-64 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
49. Perform phase adjustment. (See page 3-2,"Phase Adjusting." )Note:Perform the following step only if your printer has a MICR unit.
50. Attach the shielded paper feed motor to the main frame with two screws. Attach so that the motor cable is facing the direction shown in the illustration.
Figure 2-65
726 Screw (C.B.S-tite F, 3X6)
726 Screw (C.B.S-tite F, 3X6)
Rev. B Assembly and Disassembly 2-65
Confidential
Note:Perform the following steps only if your printer does not have a MICR unit.
51. Attach the paper feed motor to the main frame with two screws. Check that the circuit board side of the motor is facing downward as shown in the illustration.
Figure 2-66
739 Paper feed motor
726 Screw (C.B.S-tite F, 3X6)
726 Screw (C.B.S-tite F, 3X6)
2-66 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
52. Align the J/S change solenoid with the nibs and attach to the main frame with one screw.53. Lubricate the J/S change gear.
54. Attach the E-ring (2.3) to the J/S change gear shaft.
Figure 2-67
721 E-ring (3)
726 Screw (C.B.S-tite F, 3X6)
727 J/S change solenoid
G-36
Rev. B Assembly and Disassembly 2-67
Confidential
55. Snap fit the slip T.O.F. detector assembly to the slip guide upper frame.56. Pass the slip T. O. F. detector assembly lead wires through the two hooks and pass them through the hole in the main frame.
Figure 2-68
703 Slip T.O.F. detector assembly
Hooks
Hole
2-68 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
57. Align the two nibs and attach the lever motor T. P. detector assembly to the main frame withone screw. The detector assembly should not touch the lever drive motor detector plate.
Figure 2-69
614 Lever drive motor detector plate
704 Lever motor T.P. detector assembly
726 Screw (C.B.S-tite F, 3X6)
614
704
Rev. B Assembly and Disassembly 2-69
Confidential
58. Using two screws, attach the main circuit board assembly to the main frame. Place the boardso the side of the main circuit board assembly with two connectors faces the front of the main frame, and the soldered side faces upward. Align with the nibs in two places.
Figure 2-70
726 Screw (C.B.S-tite F, 3X6)
705 Main circuit board assembly
Two connectors
2-70 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
59. Solder the lead wires of the cables to the main circuit board assembly.Note:See Figure 2-83 on page 2-83 and Table 2-1 for details on where to solder.
60. Hook the lead wires on the side of the paper feed motor as shown in the illustration below.
Figure 2-71
Rev. B Assembly and Disassembly 2-71
Confidential
Note:Perform the following step only if your printer has a MICR unit.
61. Attach the MICR unit to the slip guide lower frame with two screws. Pass the MICR unit cable through the hole in the main frame.
Figure 2-72
Screw (C.B.P-tite, 3X8)
776 Screw (C.B.P-tite, 3X8)
2-72 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Note:Perform the following step only if your printer does not have a MICR unit.
62. Attach the MICR plate shutter to the slip guide lower frame with one screw.
Figure 2-73
776 Screw (C.B.P-tite, 3X8)
679 MICR shutter
Rev. B Assembly and Disassembly 2-73
Confidential
63. Pass intermediate cables A, B, C through the hole in the main frame. Attach the carriageframe unit to the main frame with four screws. Fit the nibs in the carriage frame unit to the main frame notches.
Note:Check that the carriage assembly moves smoothly and that the ribbon drive plate assembly moves smoothly with the carriage assembly.
Figure 2-74
726 Screw (C.B.S-tite F, 3X6)
726 Screw (C.B.S-tite F, 3X6)
734 Intermediate cable (type A)735 Intermediate cable (type B)736 Intermediate cable (type C)
Main frame
Hole
2-74 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
64. Attach the paper feed frame stopper and belt plate to the main frame sub assembly.65. Solder the intermediate cables (type A, B, and C) to the main circuit board assembly.
Note:See Figure 2-83 on page 2-83 and Table 2-1 for details on where to solder.
66. Align the front cover detector assembly with the nib on the main frame and attach (with one screw).
67. Solder the lead wires of the front cover detector assembly to the main circuit board assembly.
Note:See Figure 2-83 on page 2-83 and Table 2-1 for details on where to solder.
Figure 2-75
684 Belt plate
726 Screw (C.B.S-tite F, 3X6)
714 Screw (C.B.S-tite F, 3X4)
691 Front cover detector assembly
677 Paper feed frame stopper
Rev. B Assembly and Disassembly 2-75
Confidential
68. Attach the rear cover detector assembly and the R cover detector cap to the main frame withone screw.
69. Solder the lead wires of the rear cover detector assembly to the main circuit board and route the wires.
Figure 2-76
636 R cover detector cap
715 Screw (C.P.S-tite F, 3X5)
692 Rear cover detector assembly
2-76 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
70. Attach the drive lever coil cover to the slip guide lower frame.Figure 2-77
671 Drive lever coil cover
Rev. B Assembly and Disassembly 2-77
Confidential
71. Insert the paper feed frame shaft into the platen unit.72. Attach the platen unit to the main frame with two screws. Attach the platen unit as you widen both sides of the frame and fit the D shaped portions on both ends of the shaft into the D shaped cutting holes on the frame.
73. Lubricate the area where the platen lever assembly and the main frame touch.
Figure 2-78
G-36
717 Screw (C.C., 3X5)
Main frame
717 Screw (C.C., 3X5)
643 Paper feed frame shaft
Platen unit
2-78 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
74. Solder the lead wires of the paper end detector assembly to the main circuit board assembly.Note:See Figure 2-83 on page 2-83 and Table 2-1 for details on where to solder.
75. Lubricate the areas shown in the illustration.
Figure 2-79
G-36
G-36
G-36
G-36
G-36
G-48
G-36
Rev. B Assembly and Disassembly 2-79
Confidential
76. Install the carriage cover on the main frame. Hook the carriage cover on the carriage guideshaft, and align the screw hole and one nib. Tighten the left side and right side screws in that order.
Figure 2-80
714 Screw (C.B.S-tite F, 3X4)
Carriage cover
714 Screw (C.B.S-tite F, 3X4) 2
1
2-80 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
77. Connect the paper ejection detector cable assembly (type A) and the paper ejection detectorcable assembly (type B).
78. Fasten the lead wires for the paper ejection detector cable assembly (type A) and the front cover detector using a nylon clip. Secure one screw to fasten the clip.
Figure 2-81
607Nylon clip 726
Screw (C.B.S-tite F, 3X6)
737Paper ejection detector cable (type A) assembly
Rev. B Assembly and Disassembly 2-81
Confidential
Figure 2-82
607 Nylon clip
106Screw (C.B.S-tite F, 3X6)
738 Paper ejection detector cable (type B) assembly
737 Paper ejection detector cable (type A) assembly
2-82 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Reference
The following shows the areas to solder on the main circuit board assembly for M-U675.
Figure 2-83 Areas to solder on the main circuit board assembly for M-U675
Note:The colors of the lead wires to be soldered are shown as abbreviations on the circuit board. Refer to the following table for a list of the abbreviations and color names.
Table 2-1 Meaning of abbreviation
Abbreviations Color
Pur purple
Gry gray
Blk black
Red red
Org orange
Blu blue
Wht white
Pnk pink
Bwn brown
J/S change gear
Paper ejection detector assembly
Slip T.O.F. detector assemblyFront cover detector assembly
Rear cover detector assembly
Lever drive coil (type B)
Carriage unit
Paper feed motor
N.E. detector assembly
Lever drive coil (type A)Lever motor T.P. detector assembly
Lever drive motor assembly
Slip B.O.F. detector assembly
Validation detector assembly
Rev. B Assembly and Disassembly 2-83
Confidential
Assembling the TM-U675/U675P
Pre-assembly
Pre-assembly of the Insulator Spacer Assembly
1. Attach the insulator spacer to the rubber insulator spacer.
Figure 2-84
Pre-assembly of the IF Circuit Board Assembly
1. Attach the RS-232 I/F circuit board assembly to the connector plate (type AA) and tighten the screws.
2. Attach the parallel I/F circuit board assembly to the connector plate (type BA) and tighten the screws.
Figure 2-85
Note:The “connector plate (type AA)” is not supplied as a service part.
The service part “RS232 I/F circuit board unit” is supplied with the “connector plate (type AA)” attached.
113 Rubber insulator spacer
114 Metallic insulator spacer
107 Screw(C.P.S-tite(0), 3X6)
107 Screw (C.P.S-tite(0), 3X6) 107 Screw (C.P.S-tite(0), 3X6)
107 Screw (C.P.S-tite(0), 3X6)
155 Hexagon lock screw (inch type)
202 Parallel I/F circuit board unit
155 Screw (C.P.S-tite, 3X6)
123 Connector plate (type BA)
202 RS-232 I/F circuit board
unit
123 Connector plate
(type AA)
2-84 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Pre-assembly of the N. E. Detector Assembly
1. Attach the hexagon lock screw to the N. E. detector holder.
2. Attach the N. E. detector lever to the N. E. detector holder. Check how the lever moves two to three times.
3. Fix the micro switch to the N. E. detector holder with one screw. Attach in the direction shown in the figure.
Figure 2-86
119 Micro switch
118 Screw (C.B.B-tite, 2X8)
117 N.E. detector lever
116 N.E. detector holder
120 Hexagon nut
Rev. B Assembly and Disassembly 2-85
Confidential
Assembly of the TM-U675
1. Attach the main circuit board unit to the main plate sub assembly with six screws.
Note:Components and the firmware program used on the main circuit board unit differ according to the configuration. Use the main circuit board unit that is appropriate for your configuration.
2. Attach the strengthening plate B to the main plate sub assembly with three screws.
Figure 2-87
133 Main plate sub assembly
106 Screws (C.B.S-tite F, 3X6)
135 Strengthening plate
107 Screw (C.P.S-tite(0), 3X6)
107 Screws (C.P.S-tite(0), 3X6)
107 Screw (C.P.S-tite(0), 3X6)
107 Screw (C.P.S-tite(0), 3X6)
201 Main circuit board unit
2-86 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
3. Insert the two tabs on the mechanism assembly (M-U675) into the two slits in thestrengthening plate.
4. Position the nibs and nib holes shown in the illustration and attach the two insulator spacer assemblies. The flange of the metallic insulator spacer should be facing downward.
5. Fasten the mechanism assembly (M-U675) using one screw.
Figure 2-88
106 Screw (C.B.S-tite F, 3X6)
600 Mechanism assembly (type BB)
Insulator spacer assemblies
Nibs
Nib holes
Flange of the metallic insulator spacer
Rev. B Assembly and Disassembly 2-87
Confidential
6. Connect the power switch cable assembly to the main circuit board unit.7. Connect the control panel cable to the main circuit board unit.
8. Pass the N. E. detector assembly unit lead wire through the hole in the plate and connect to the main circuit board unit.
Figure 2-89
205 N.E. detector assembly lead wire
203 Power switch cable assembly
Main circuit board unit
207 Control panel cable
2-88 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
9. Pass the power switch cable assembly between the L-shaped piece in the main plate subassembly and the QM6 element on the main circuit board unit, as shown in the illustration.
10. Use insulated tape on the areas shown in the illustration to secure the power switch cable assembly temporarily.
11. Connect the two circuit board FFCs to the main circuit board unit and the mechanism assembly (M-U675) in that order. Bend the FFCs so that the fold is on the main circuit board side.
Figure 2-90
206 Circuit board FFC
Tape
203 Power switch cable assembly
QM6
203 Power switch cable assembly
L-shaped piece in the main plate sub assembly
Rev. B Assembly and Disassembly 2-89
Confidential
Note:Perform the following step only if your printer has a MICR unit.
12. Connect the MICR cables (two connectors). Put the excess cable into the opening as shown in the illustration.
Figure 2-91
2-90 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
13. Fix the control panel circuit board assembly to the mechanism assembly (M-U675) with onescrew.
14. Connect the control panel cable to the control panel circuit board assembly. Route the wiring so that the control panel cable is positioned under the L-shaped part shown in the illustration.
Figure 2-92
204 Control panel circuit
board assembly
102 Screw (C.B.S-tite F, 3X4)
207Control panel cable
L-shaped part
Rev. B Assembly and Disassembly 2-91
Confidential
15. Attach the rubber feet to the lower case.16. Attach the mechanism assembly (M-U675) to the lower case with four screws. Align the mechanism assembly (M-U675) with the lower case nibs.
CAUTION:Be careful not to allow the power switch cable assembly to become pinched.
Figure 2-93
109 Screw (C.B.B-tite, 4X25)
112 Plain washer (4.2X1X12)
108 Screw (C.B.B-tite, 4X12)
124 Rubber foot
124 Rubber foot
124 Rubber foot
108 Screw (C.B.B-tite, 4X12)
127Lower case
2-92 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
17. Remove the tape that is temporarily holding the power switch cable assembly and attach theswitch to the lower case. Assemble so that the “O” mark is on the left side and the “I” mark is on the right side.
Figure 2-94
203 Power switch cable assembly
Rev. B Assembly and Disassembly 2-93
Confidential
18. Attach the roll paper receive roller to the roll paper holder.19. Attach the N. E. detector assembly to the roll paper holder.
20. Fit the N. E. detector spacer onto the N. E. detector adjustment screw, and attach the N. E. detector assembly to the paper roll holder.
21. Fit the holder spring onto the holder plate (type A), and attach to the roll paper holder.
Figure 2-95
154 Roll paper receive roller154 Roll paper receive roller
121 N.E. detector spacer
142 Holder spring
141 Holder plate (type A)
143 Roll paper holder
125 N.E. detector adjustment screw
142
141143
2-94 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
22. Lubricate the hole in the axis of the take-up gear.23. Insert the take-up spring into the take-up pulley while aligning the craw on the spring into the pulley.
24. Remove the take-up pulley and lubricate the take-up spring attached to the take-up gear. Reattach the take-up pulley.
25. Attach the take-up gear to the take-up frame assembly.
Figure 2-96
151 Take-up spring
146 Take-up gear
152 Take-up pulley
105 E-ring (2)
147 Take-up frame assembly
G-36
G-36
Rev. B Assembly and Disassembly 2-95
Confidential
26. Connect the N. E. detector lead wire to the micro switch on the N. E. detector assembly.27. Fasten the N. E. detector lead wire using a nylon clamp and tighten one screw. Pinch the core of the N. E. detector lead wire and tighten the screw.
Figure 2-97
205 N.E. detector assembly lead wire
150 N.E. detector assembly lead wire
101 Screw (C.B.P-tite, 3x8)
2-96 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
28. Attach the roll paper holder to the lower case. Touch the roll paper holder against themechanism assembly and tighten the two screws while pushing to the back left side.
Figure 2-98
143 Roll paper holder
103 Screws (C.P.T-B, 3X10)
Rev. B Assembly and Disassembly 2-97
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29. Attach the take-up frame assembly to the roll paper holder with two screws. Touch the take-up frame assembly against the main unit mechanism and roll paper holder ribs.
Figure 2-99
103 Screw (C.P.T-B, 3X10)
147 Take-up frame assembly
147 Take-up frame assembly
143 Roll paper holder
2-98 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
30. Hang the paper take-up belt onto the take-up pulley. Then, hang to the take-up gear of themechanism assembly. Place the lower side of the belt onto the belt plate. Hang the take-up pulley first. Then, hang on the take-up drive gear on the mechanism assembly (M-U675).
Figure 2-100
153 Paper take-up belt
1
2
Rev. B Assembly and Disassembly 2-99
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31. Fit the support plate and the table holder into the lower case.Figure 2-101
137 Support plate
138 Table holder
2-100 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
32. If you have a new upper case, there is a plate for support to prevent damage duringshipment. Cut this plate in the manner shown in the illustration below.
33. Snap fit the back case to the upper case to attach.
Figure 2-102
128 Upper case
129 Back case
CUT
CUT
Rev. B Assembly and Disassembly 2-101
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34. Attach the upper case to the lower case.Figure 2-103
128 Upper case
127 Lower case
2-102 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
35. Before aligning the tabs on the upper and lower cases, pass the cable wire for the paperejection detector cable assembly (type A) through the slit in the upper case.
NoteDo not confuse with the cable wire for the paper ejection detector cable assembly (type B).
Figure 2-104
737 Paper ejection detector cable assembly (type A)
Slit
738 Paper ejection detector cable assembly (type B)
Rev. B Assembly and Disassembly 2-103
Confidential
36. Align all tabs on the upper and lower cases. When doing so, do not allow the cable wire tobecome pinched between the cases.
37. Push the cable wire for the paper ejection detector cable assembly (type A) connector into the hole in the upper case. Then, route the cable wire for the paper ejection detector cable assembly (type B) as shown in the illustration at right, so that it is not in the way of the ribbon cassette.
Figure 2-105
2-104 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
38. Pass the flat cable for the control panel unit through the slit in the front case and attach thecontrol panel unit to the front case. Snap fit the switch panel unit in the order indicated in the illustration.
Figure 2-106
130 Front case
134 Control panel unit
Slit
12
Rev. B Assembly and Disassembly 2-105
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39. Attach the clamp to the front reinforcement frame.40. Connect the control panel unit cable to the control panel circuit board assembly.
41. Attach the front case. Align with the hole in the front case and attach. When doing so, the flat cable for the control panel unit should be on top of the cable wire for the control panel cable.
CAUTION:If the flat cable for the control panel unit is not on top of the cable wire for the control panel cable, there is the possibility that the flat cable could be too short.
42. Fasten the front case using two screws.
Figure 2-107
103 Screw (C.P.T-B, 3X10)
110 Clamp
104 Screw (C.C., 4X20)
130 Front case
Flat cablefor control panel unit
Cable wirefor control panel cable
2-106 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
43. Place the take-up assembly above the main unit mechanism. Lubricate the sliding parts ofthe take-up assembly and the take-up frame assembly.
Figure 2-108
126 Take-up assembly
G-36
G-36
Rev. B Assembly and Disassembly 2-107
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44. Attach the rear sound absorption material and the operation label (type AA) to the roll papercover.
45. Attach the roll paper cover to the back case.
Figure 2-109
132 Roll paper cover
139 Operation label (type AA)
145 Rear sound absorption material
2-108 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
46. Attach the front sound absorption material to the ribbon cassette cover.47. Attach the ribbon cassette cover to the upper case. Align the hinges on the ribbon cassette cover with the nibs and attach.
Figure 2-110
131 Ribbon cassette cover
144 Front sound absorption material
1
2
Rev. B Assembly and Disassembly 2-109
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48. Attach the I/F circuit board unit to the main circuit board unit with two screws.Figure 2-111
I/F circuit board unit
107Screws (C.P.S-tite(0), 3X6)
2-110 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
49. Attach the lower plate and the IC cover to the main plate sub assembly with five screws.When doing so, check that the wiring of the power switch cable assembly is as shown in Figure 2-89.
Figure 2-112
136 Lower plate
111 IC cover
106 Screws (C.B.S-tite F, 3X6)
Rev. B Assembly and Disassembly 2-111
Confidential
50. Attach the three screws for fastening the display module (option).Figure 2-113
106 Screws (C.B.S-tite F, 3X6)
2-112 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
51. Fasten the upper case and lower case by tightening the two screws.Figure 2-114
103 Screws (C.P.T-B, 3X10)
Rev. B Assembly and Disassembly 2-113
Confidential
52. Affix a caution seal.53. Affix an operation label (type BA).
54. Affix an operation label (type DA).
55. Affix a front seal.
56. Affix a head caution seal.
Figure 2-115
57. Attach paper path spacers to allow printing without roll paper if the printer model supports paper path spacers. (See Addendum 1.)
58. Perform the following adjustments and settings. (See Chapter 3, Adjusting and Setting. For the printer model that supports paper path spacers, also see Addendum 1.)
• Platen gap adjustment
• Setting threshold values for detectors
59. If the customer sent you a printer model that supports paper path spacers but the paper path spacers were removed, remove the spacers from the repaired printer before returning it. (See Addendum 1.)
149 Operation label (type DA)
162 Head caution seal
122 Caution seal
140 Operation label (type BA)
148 Front seal
2-114 Assembly and Disassembly Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Chapter 3Adjusting and Setting
Before Adjusting and Setting
Always observe the following precautions when adjusting and setting.
CAUTION:Always remove the power supply unit from the printer before working.There is power flowing in the internal circuit board even if you turn off the printer power supply switch. You can damage the printer if you work when the power supply is still attached.
Remove all peripheral equipment connected to the printer before starting your work.
Do not perform any work that is not described in this chapter. Doing so can result in injuries or damage to the printer.
Do not touch the flexible plastic cable (FPC) or the FFC pins with your hands.
Rev. B Adjusting and Setting 3-1
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Phase AdjustingPerform phase adjustments when you have removed or replaced any of the following.
1. Press the tab of the lever drive coil (type B).
Figure 3-1
Items Requiring Phase Adjustment
The lever drive gear.
The lever drive transmission gear.
The platen lever drive cam.
Lever drive coil (type B)
Claw when raised Claw when pushed
3-2 Adjusting and Setting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
2. While pressing the tab of the lever drive coil (type B), rotate the lever motor reduction gearin the direction indicated in the illustration, so that the protrusion on the lever drive gear faces the very bottom of the printer.
Figure 3-2
3. Remove your finger from the claw of the lever drive coil (type B). Check that the claw returns to its original position. Redo from step 1 if it has not returned to its original position.
Figure 3-3
A
A
A
Lever motor reduction gear
Lever drive gear protrusion
Lever drive gear
Lever drive coil (type B)
Rev. B Adjusting and Setting 3-3
Confidential
4. Rotate the lever motor reduction gear. Continue until the lever drive gear no longer rotates.Figure 3-4
Lever motor reduction gear
Lever drive gear
3-4 Adjusting and Setting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
5. While the printer is in that state, attach the lever drive transmission gear to the lever drivetransmission gear axis. (Using one E-ring.)
Figure 3-5
Lever drive gear
Lever drive transmission gear
Lever drive transmission gear
E-ring
Rev. B Adjusting and Setting 3-5
Confidential
6. Lubricate the platen lever drive cam shaft.7. Assemble the platen lever drive cam to the platen lever drive cam shaft (Using one E-ring). Set so that the three gear teeth of the platen lever drive cam are facing downward.
Figure 3-6
G-36
Three teeth of the gear
Platen lever drive cam
E-ring
Lever drive transmission gear
Platen lever drive cam
Platen lever drive cam
E-ring
3-6 Adjusting and Setting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Figure 3-7
Lever drive gear
Lever motor reduction gear
Platen lever drive cam
Tab of the lever drive coil ( type B )
Rev. B Adjusting and Setting 3-7
Confidential
Adjusting the Platen GapAdjust the platen gap when you have performed either of the following:
Use the following steps to adjust the platen gap.
1. Connect the power supply unit to the printer. Turn on the printer power switch. Turn off the printer power switch when the printer finishes the power on test. Remove the power supply unit from the printer. (This procedure will close the platen.)
Note:When you are adjusting the platen gap, you must close the platen. There are instances where the platen is open on this printer after assembly because of positioning of the gears and cams. Therefore, you must always use the procedure in step to close the platen.
2. Remove the ribbon cassette cover. (See page 2-109.)
3. Remove the carriage cover frame assembly. (See page 1-16.)
4. Use 0.45 mm and 0.50 mm thickness gauges. Insert the thickness gauges from the side of the print head unit, as shown in the figure below.
Figure 3-8
Platen Gap Adjustment
Replaced or removed the print head unit.
Disassembled or re-assembled the TM-U675/U675P printer.
3-8 Adjusting and Setting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
5. Using the thickness gauges, adjust the platen stopper screws so that the positions indicatedbelow are 0.5 ± 0.05 mm.
The stopper screws for the platen set are located here.
Figure 3-9
Note:Adjust the platen gap to meet the following conditions (0.5 ± 0.05 mm).
The 0.45 mm thickness gauge falls under its own weight.
The 0.50 mm thickness gauge is pinched and will not fall between the platen and the print head unit.
6. Attach the ribbon cassette cover and the carriage cover set frame.
20 mm 40 mm
0.5 +/- 0.05 mm
Adjustment Screw Gauge
Print Head
Adjustment Screw
Rev. B Adjusting and Setting 3-9
Confidential
Setting Threshold Values for DetectorsPerform this setting when you have removed or replaced any of the following.
CAUTION:Work indoors to avoid direct sunlight when doing the following. Use normal fluorescent lighting available in most rooms. You will not be able to make accurate adjustments if there is natural light (sunlight) or man-made light sources (lamps, etc.) other than fluorescent lighting. Allow all the light from the fluorescent lighting to enter the printer when working. You will not be able to make accurate adjustments if you allow a shadow to fall on the printer or you turn OFF the fluorescent lighting while working.
Note:The procedures for the TM-U675 model that supports paper path spacers to allow printing without roll paper are different from the procedures described in this section.
See Addendum 1 for the procedures to set the threshold values on a printer model that supports the paper path spacers.
1. Install the roll paper.
Note:You must have roll paper installed to make accurate settings.
2. Remove slip paper if it is inserted.
Note:You cannot make accurate settings if there is slip paper present.
3. Connect the power supply to the printer.
4. Open the roll paper cover.
5. Turn on the power switch for the printer while holding down the FEED button and the RELEASE button at the same time.
6. Press the RELEASE button 7 times.
Items Requiring Setting
The slip T. O. F. detector assembly.
The slip B. O. F. detector assembly.
The paper ejection detector assembly.
The validation detector assembly.
The mechanism assembly.
The main circuit board unit.
3-10 Adjusting and Setting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
7. Close the roll paper cover.Note:The printer will automatically set the detectors. The main circuit board will store the setting values.
Rev. B Adjusting and Setting 3-11
Confidential
3-12 Adjusting and Setting Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Appendix AService Tools and Lubricants
Table A-1 Service tools required
Tool Size Purpose
Gap gauges <Thickness>0.45 mm x 10.50 mm x 1
To adjust the platen gap.
Crosshead screwdriver No. 0, 1 and 2 Other assembly/disassembly
Flathead screwdriver — Other assembly/disassembly
Tweezers — Other assembly/disassembly
Soldering iron — Other assembly/disassembly
Wrist band — Other assembly/disassembly
E-ring holder 1.2, 1.5, 2.0, 2.3, 3.0, 4.0, and 5.0
Other assembly/disassembly
Hexagon box driver 5.5 mm Other assembly/disassembly
Table A-2 Lubricants
Lubricant
O-10
G-36
G-47
G-48
Rev. B Service Tools and Lubricants Appendix A-1
Confidential
Appendix A-2 Service Tools and Lubricants Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Appendix BMaintenanceMaintenance and Inspection
Perform maintenance and inspection to prevent trouble and maintain the fine, initial performance of this printer for a long time.
There are two types of maintenance and inspection of this printer, based on the technical skill required: “Daily Inspection” and “Periodic Inspection.”
Daily Inspection Items that can be inspected easily and handled by a user of this printer.
Periodic Inspection Items that are inspected and handled by a person who has technical knowledge.
Daily Inspection
Table B-1 Daily inspection checklist
Items to Check Checkpoints Handling
Printer setup The connector cables are plugged in. Reconnect cables.
The roll paper and ribbon cassette are properly installed.
Install them properly.
The ribbon is routed properly in the printer.
The ribbon is not damaged. Replace the ribbon cassette.
The roll paper cover is closed. Close the cover.
The front cover (ribbon cassette cover) is closed.
Paper dust or particles in the printer
Open the roll paper cover. There should be no large paper particles or foreign matter inside.
Remove the paper particles or foreign objects.
Use a small vacuum cleaner for computer equipment to clean thoroughly.
Open the front cover (ribbon cassette cover). There should be no large paper particles or foreign matter inside.
Remove the paper particles or foreign objects.
Use a small vacuum cleaner for computer equipment to clean thoroughly.
Rev. B Maintenance Appendix B-1
Confidential
Periodic InspectionTable B-2 Periodic inspection checklist
Items to Check Checkpoints Handling When to Perform
Status of paper dust, dirt, dust adhering to the parts
Is there a great deal of dirt, or dust adhering to the parts?
Use a small vacuum cleaner for computer equipment to clean thoroughly.
Twice a year
Is there paper dust at each of the following detectors and in the slip paper path? Slip T. O. F. detector Slip B. O. F. detector Paper ejection detector Validation detector H. P. detector
Use an air spray can to blow out paper dust.
Twice a year
Is the receipt side platen roller white with paper dust?
Dampen a cloth with a small amount of water and wipe the roller surface.
Twice a year
Spring shapes Are springs deformed or loose? Reattach or replace the springs. Twice a year
MICR status Check to see if reading can be performed and checks can be inserted.
Clean the MICR head (see page B-3).
Once a year or every72,000 passes
Lubrication status Check the lubrication. See Appendix G “General Lubrication Point Diagrams.”
Twice a year
Operation check Are there any abnormal noises or printing errors when operating?
See Chapter 1 “Troubleshooting.” Twice a year
Appendix B-2 Maintenance Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
MICR CleaningIt is recommended that you clean the MICR head periodically (generally once a year or every 72,000 passes) to maintain the accuracy of the MICR reading.
Use a damp-type cleaning sheet to clean the MICR head.
CAUTION:Do not use an adhesive-type cleaning sheet.
Note:Generally, clean once a year or every 72,000 passes. Adjust the timing of each cleaning according to the operating conditions.
Cleaning Sheet Standards
Use the following commonly sold cleaning sheet.
PRESAT brand (KIC) “CHECK READER CLEANING CARD” or the equivalent product (damp-type cleaning sheet).
Procedures for Cleaning
You can clean in the following modes. Select the mode when you start cleaning.
Self mode
Command mode
When Cleaning in the Self Mode
1. Load roll paper in the printer.
2. Turn OFF the power supply to the printer.
3. Open the receipt cover.
4. Turn the power supply ON while pressing the RELEASE button.
5. Press the RELEASE button seven times.
6. Close the receipt cover.
Rev. B Maintenance Appendix B-3
Confidential
7. The following message prints on the roll paper (receipt side) and the SLIP LED flashes.8. Insert the cleaning sheet into the printer in the same way as a check.
CAUTION:Insert the cleaning sheet in the correct direction.
9. After the cleaning sheet is ejected, press the RELEASE button once and remove the sheet.
CAUTION:Do not reuse cleaning sheets.
10. Turn OFF the power supply to the printer.
When Cleaning in the Command Mode
1. Execute the MICR cleaning command FS c.
2. Insert the cleaning sheet into the printer in the same way as a check.
CAUTION:Insert the cleaning sheet in the correct direction.
3. After the cleaning sheet is ejected, press the RELEASE button once and remove the sheet.
CAUTION:Do not reuse cleaning sheets.
**** RECOGNITION MODE ****
Please set check.
Appendix B-4 Maintenance Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Appendix CInstallationYou can connect up to four cables to the printer. They all connect to the connector panel (on the bottom rear of the printer), which is shown below.
Figure C-1 Connector panel
Note:This illustration shows the serial interface model. If you have the parallel interface model, your interface connector will look different.
Before connecting any of the cables, make sure that both the printer and the host PC are turned off.
Connecting to the Host PC
You need an appropriate serial interface or parallel interface cable to connect your computer to the printer. For the serial model use a null modem cable, and for the parallel model use an IEEE 1284 cable.
Note:It is important that you use a null modem cable with the serial interface model. Do not use any other type of serial cable.
1. Plug the cable connector securely into the printer’s interface connector.
2. If the cable connector has screws on it, tighten the screws on both sides of the connector.
Figure C-2 Tightening the screws
Rev. B Installation Appendix C-1
Confidential
Note:Your printer has inch-type hexagonal lock screws installed. If your interface cable requires millimeter-type screws, replace the inch-type screws with the enclosed millimeter-type screws using a hex screwdriver (5 mm).
Figure C-3 Inch screw and millimeter screw
3. If your interface connector has a grounding wire, attach it to the printer using the screw labeled FG, which is next to the interface connector.
4. Attach the other end of the cable to the host PC.
Connecting the Drawer
WARNING:Use a drawer that matches the printer specification. Using an improper drawer may damage the drawer as well as the printer.
Do not connect a telephone line to the drawer kick-out connector; otherwise the printer and the telephone line may be damaged.
Plug the drawer cable into the drawer kick-out connector on the connector panel in the location indicated below.
Figure C-4 Connecting the drawer
inch screw millimeter screw
There is a line mark on the side
drawer kick-out connector
Appendix C-2 Installation Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Connecting to a Direct Connection Display ModuleWARNING:Be sure not to connect this cable to the drawer kick-out connector, which is next to the power connector.
Also do not connect a telephone line to the display module connector.
Note:The DM connector can be used only with the serial interface model of this printer.
1. Make sure that the printer is turned off.
2. Plug the cable connector (provided with the direct connection display module) securely into the printer's display module connector until it clicks.
Figure C-5 Connecting to a direct connection display module
DM connector
Rev. B Installation Appendix C-3
Confidential
Power ConnectionUse the optional EPSON PS-170 power supply or equivalent for your printer.
WARNING:Make sure you use the EPSON PS-170 power supply or equivalent. Using an incorrect power supply may cause fire or electrical shock.
CAUTION:When connecting or disconnecting the power supply from the printer, make sure the power supply is not plugged into an electrical outlet. Otherwise you may damage the power supply or the printer.
If the power supply’s rated voltage and your outlet’s voltage do not match, contact your dealer for assistance. Do not plug in the power cord. Otherwise you may damage the power supply or the printer.
1. Make sure the printer’s power switch is turned off, and the power supply’s power cord is unplugged from the electrical outlet.
2. Check the label on the power supply to make sure the voltage required by the power supply matches that of your electrical outlet.
3. Plug the power supply cord into the connector shown below.
Figure C-6 Power connection
Note:To remove the DC cable connector, make sure the power supply’s power cord is unplugged; then grasp the connector at the arrow and pull it straight out.
power supply connector
Appendix C-4 Installation Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Appendix DProduct OverviewComponent Functions
Figure D-1
Figure D-2
Figure D-3
Front cover
Paper roll cover
Control panel
Interface connector (*)
DM connector Drawer kick-out connector
Power supply connector
(*) This illustration shows the serial interface model. The parallel interface connector looks slightly different.
DIP switch cover
Rev. B Product Overview Appendix D-1
Confidential
Outline of Printer MechanismPrinting Mechanism
This mechanism consists of the print head unit, which has nine wires vertically arranged in one row, the head carriage assembly, platen, carriage motor, carriage drive pulley, carriage guide shaft, carriage transmission pulley, and carriage transmission belt. (See Figure D-4.)
Figure D-4
Platen
Print head unit
Carriage drive pulley
Carriage motor gear
Head carriage assembly
Carriage transmission belt
Carriage transmissionpulley
Carriage guide shaft
Appendix D-2 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Movement of print head unit
When the carriage motor rotates the carriage motor gear in the direction shown by the white arrow, the driving force is transmitted sequentially to the carriage drive pulley and carriage transmission belt, moving the head carriage assembly, which is fixed to the carriage transmission belt, in the direction indicated by the white arrow. (See Figure D-5.)
Figure D-5
Printing operation
Wire movement when printing one dot
1. When an electrical pulse is applied to the drive coil, the steel core is excited, and the operation plate is pulled in the direction indicated by black arrow. At this time, the dot wire is pressed against the operation plate by the force of the wire return spring. The force of the operation plate pushes the dot wire out towards the platen (in the direction indicated by black arrow).
2. The dot wire prints a dot when it strikes the platen through the ink ribbon and paper.
Carriage drive pulley
Carriage motor gear
Print head unit
Carriage transmission belt
Head carriage assembly
Rev. B Product Overview Appendix D-3
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3. When the electrical pulse to the drive coil ends, the dot wire and operation plate arereturned to the standby status by the spring force of the wire return spring and operation plate spring. (See Figure D-6.)
Figure D-6
Operating plate Wire return spring
Dot wire
Paper
Wire guide
Ink ribbon
Platen
Core
Drive coil
Appendix D-4 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Printing operation when printing one character
This section explains the printing operation for a 9 9 dot matrix.
Characters are printed by energizing the print solenoids at a timing corresponding to the head carriage movement position, using the carriage motor phase change signal as a reference signal. The print head unit moves approximately 0.339 mm with a one step rotation (7.5°) of the carriage motor.
To print the number "2," print solenoid numbers 2 and 9 are energized in sync with the carriage motor phase change signal. Next, print solenoid number 8 is energized in sync with TnH, delayed by a half dot time interval. The number "2" is printed by repeating this process.(See Figure D-7.)
Figure D-7
TnH Tn4(H)
Tn
Print solenoid 1
Carriage motor phase switching timing
2
3
4
5
6
7
8
9
Tn+2 Tn+4Tn+1 Tn+3 Tn+5
Rev. B Product Overview Appendix D-5
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Platen open/close operationThe platen adjustment screw attaches the platen to the platen lever. The platen opens and closes to prepare for feeding a slip, check, or validation sheet. When the lever coil is energized while the lever drive motor rotates, it releases the linkage of the lever ratchet wheel to the paper feed trigger attraction plate, and the lever drive gear rotates the prescribed amount in the direction shown by the arrow. This rotation is transmitted by the lever drive transmission gear, rotating the platen lever open/close cam 180°. The platen lever moves in the direction indicated by arrow a around the platen lever shaft, and the platen and slip feed roller open. (See Figure D-8.)
To close the platen, the lever drive coil is energized again while the lever drive motor rotates, turning the lever drive gear the prescribed amount in the direction of the arrow. This rotates the platen lever open/close cam 180°, and the platen lever is moved in the direction shown by arrow b around the platen lever shaft by the slip retainer spring. The slip feed roller and slip hold roller make contact at this time, closing the platen.
Figure D-8
Validation paper
Platen lever shaft
Platen lever
Slip feed roller
Platen
Slip hold rollerPlaten leverdrive cam
Lever drive transmission gear
Lever drive gear
a
b
Appendix D-6 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Detection Mechanism Unit
The detection mechanism unit is comprised of the following mechanisms.
* The roll paper near end detector mechanism is installed on the paper supply unit.
Figure D-9
Table D-1 Detection mechanism unit functions
Mechanism Function
Home position detection mechanism
Initial setting of printer (carriage home position)
Carriage detection mechanism
Detection of head carriage malfunction
B.O.F. detection mechanism Slip detection
T.O.F. detection mechanism Slip detection
Paper ejection detection mechanism
Slip detection
Roll paper end detection mechanism
Roll paper detection
*Roll paper near enddetection mechanism
Roll paper detection
Validation detector mechanism
Validation paper detection
Lever motor T.P. detection mechanism
Lever drive motor timing signal detection
Front cover detection mechanism
Front cover open/closed status detection
Rear cover detection mechanism
Detects the open/close status of the rear cover
Roll paper N.E.detector (micro switch)
Rear cover detector assembly
Paper ejection detector assembly
Front cover detector assembly
Home position detectorassembly
Lever motor T.P. detectorassembly
Validation detector assembly
Carriage detectorassembly
T.O.F. detectorassembly
B.O.F. detectorassembly
Roll paper end detector assembly
Rev. B Product Overview Appendix D-7
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Home position detection mechanismThe home position detection mechanism is located at the left end of the head carriage assembly. This mechanism keeps track of the head carriage assembly movement position. The initial setting is made by sensing the detection plate at the rear of the head carriage assembly.
The home position detector consists of an LED and photo IC. When the head carriage assembly is moved, the detection plate passes between the LED and photo IC. The photo IC output level changes when the light rays are interrupted. This change in output level is used as a detection signal for the head carriage movement position.
Figure D-10
Carriage detection mechanism
The carriage detection mechanism uses a rotary encoder interlocked to the carriage motor gear to detect abnormal carriage motor rotation.
This mechanism is comprised of the carriage drive transmission gear and carriage detector, which are located on the carriage motor shaft.
The carriage detector consists of an LED and phototransistor.
The driving force generated by the carriage motor is transmitted to the carriage motor gear, carriage drive pulley, carriage belt, carriage transmission pulley, and the carriage drive transmission gear, which is located at an equal interval on the inside of the gear, where the screening plate is located. When the carriage drive transmission gear is rotated by the driving force of the carriage motor, the screening plate passes between the LED and phototransistor.
The output level of the phototransistor changes at this time, since the light rays are interrupted.
This output level is used as the detection signal for carriage motor rotation.
Figure D-11
GND
High
+5V
GND
Low
When light is interrupted
When light is emitted
Printer side
Head carriage detector assembly
Signal level at point A
GND
High
+5V
GND
Low
When light is interrupted
When light is emitted
Printer side
Screening plate
Signal level at point A
Appendix D-8 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Figure D-12
Bottom of form (B.O.F.) detection mechanism
The B.O.F. detection mechanism detects whether or not slip paper has been inserted, and detects the rear edge of the paper when printing is performed.
The mechanism is located near the right end of where paper is inserted to ensure it can determine whether or not a slip has been inserted and for proper positioning.
The B.O.F. detector is comprised of an LED and phototransistor. When a paper slip is inserted, the light rays between the LED and photo resistor are interrupted, resulting in a change in the phototransistor output level.
This change in output level is used as a detection signal to determine whether or not a slip has been inserted.
Figure D-13
Top of form (T.O.F.) detection mechanism
The T.O.F. detection mechanism detects whether or not a slip has been inserted. The mechanism is located near the top (before the form stopper) to ensure it can determine whether or not a slip has been inserted and for proper positioning.
Carriage belt
Carriage drive pulley
Screening plateCarriage drive transmission gear
Carriage transmission pulley
Carriage motor gear
Carriage detector
GND
High
+5V
GND
Low
When light is interrupted
When light is emitted
Printer side
Paper guide
Slip paper
Slip paper
Document table
B.O.F detector assembly
Signal level at point A
Rev. B Product Overview Appendix D-9
Confidential
The T.O.F. detector is comprised of an LED and phototransistor. Reflected light is used to determine whether or not a slip has been inserted.When a slip is inserted, light emitted by the LED is reflected, resulting in a change in the phototransistor output level.
This change in output level is used as a detection signal to determine whether or not a slip has been inserted.
Figure D-14
Paper ejection detection mechanism
The paper ejection detection mechanism detects whether or not a slip has been inserted. The mechanism is located on the head cover for the slip paper ejection port to ensure it can determine whether or not paper remains in the unit after the slip ejection operation has taken place.
The paper ejection detector is comprised of an LED and phototransistor. Reflected light is used to determine whether or not the slip has been ejected.
When a slip reaches the paper ejection detector after printing is performed and the slip is fed, light emitted by the LED is reflected, resulting in a change in the phototransistor output level.
This change in output level is used as a detection signal to determine whether or not a slip is present.
Figure D-15
GND
High
+5V
GNDLow
When light is interrupted
When light is emitted
Printer side
Slip paper
Signal level at point A
GND
High
+5V
GNDLow
When light is interrupted
When light is emitted
Printer side
Slip paper
Signal level at point A
Appendix D-10 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Roll paper end detector mechanism
The roll paper end detector mechanism detects the presence of roll paper. It is located behind the sub paper feed roller in the roll paper feed path so that it can detect the insertion of paper when semi-automatically loading roll paper.
The roll paper end detector includes an LED and a phototransistor. The reflection of light is used to detect the presence of paper.
When there is paper in the feed path, or when you are performing semi-autoloading, LED light is reflected when the roll paper is inserted. This changes the output level of the phototransistor. The change in output level is detected and is used as the detection signal for the presence of roll paper.
Figure D-16
GND
High
+5V
GNDLow
When light is interrupted
When light is emitted
Printer side
Roll paper
Signal level at point A
Rev. B Product Overview Appendix D-11
Confidential
Roll paper near end detector mechanismThe roll paper near end detector mechanism is made up of the N.E. detector lever and a microswitch. It is attached to the right side of the paper feed unit, and it detects the amount of roll paper remaining.
The tip of the N.E. detector lever is pushed against the edge of the roll paper by a spring built into the microswitch. Therefore, the N.E. detector lever touches the edge of the roll paper when there is a substantial amount of roll paper remaining, which keeps the microswitch turned ON, as shown in the following illustration. The tip of the N.E. detector lever moves in the direction of the arrow as the amount of roll paper remaining becomes lower than the prescribed amount. The tip of the N.E. detector, thus, moves toward the core of the roll paper center thereby turning OFF the microswitch to generate a detection signal.
Figure D-17
Validation detector mechanism
The validation detector mechanism is located near the bottom of the paper insertion position to detect the presence of a validation sheet.
The validation detector mechanism includes an LED and a phototransistor. Reflected light is used to detect the presence of paper. Inserting validation paper causes the LED light to reflect, which changes the output level of the phototransistor.
This detector mechanism detects the change in output level and outputs a detection signal for the presence of the validation paper.
Figure D-18
Unit case
Roll paper
Micro switch
N.E. detector lever
Roll paper axis center
Roll paper axis center
GND
High
+5V
GNDLow
When light is interrupted
When light is emitted
Printer side
Validation paper
Signal level at point A
Appendix D-12 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Lever motor timing pulse (T.P.) detection mechanism
The lever motor T.P. detection mechanism consists of a lever drive motor detector plate and lever motor T.P. detector on the lever drive motor gear. It detects lever drive motor rotation and generates the signal, which determines the timing for energizing of the lever coil, which in turn controls opening/closing of the platen lever and opening/closing of the sub slip feed roller.
Figure D-19
Figure D-20
Lever drive motor
Lever drive motor detector plate
Lever drive motor gear
Lever motor T.P. detector
GND
High
+5V
GND
Low
When light is interrupted
When light is emitted
Printer side
Lever drive motor detector plate
Signal level at point A
Rev. B Product Overview Appendix D-13
Confidential
Front cover open detection mechanismThe front cover open detector is located at the right side of the printer mechanism, and detects opening and closing of the front cover. This detector consists of an LED and phototransistor. A screening part, located on the rear of the cover, interrupts light rays when the cover is closed. When the cover is opened, the light rays reach the phototransistor, resulting in a change in its output level. This change in output level is used as a detection signal to determine when the front cover is open.
Figure D-21
Rear cover detector mechanism
The rear cover detector is located in the back, right side of the printer mechanism. It detects whether the rear cover is open or closed. This detector is comprised of an LED and phototransistor. When the cover is closed, the light interrupter on the back of the cover interrupts the optical axis. When the cover is open, the optical axis is opened, which changes the output level of the phototransistor. The detector takes this output level as the detection signal for the rear cover open detector.
Figure D-22
GND
High
+5V
GND
Low
Printer side
Front cover light interrupter unit
When light is interrupted
When light is emitted
Signal level at point A
GND
High
+5V
GND
Low
Printer side
Rear cover light interrupter unit
When light is interrupted
When light is emitted
Signal level at point A
Appendix D-14 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Roll Paper Feed Mechanism
This mechanism mainly includes the paper feed motor, J/S change assembly, roll paper feed gears, and the paper feed unit. Paper feeds are performed by switching the power from the paper feed motor between the roll paper feed and slip paper feed by the J/S change assembly. This explains the operation for roll paper feeds.
Figure D-23
Roll paper insertion operation (semi-autoloading)
When the platen lever open/close cam is in the idle position, the sub paper feed rollers and sub paper hold rollers in the paper feed unit are open. (See "Platen open/close operation" earlier in this appendix.) When the leading edge of paper is manually inserted into the opening, the paper end detector built into the paper feed unit detects its presence. The platen lever open/close cam rotates and the sub paper feed roller and sub paper hold rollers close to grasp the paper and the rotation of the paper feed motor starts the semi-autoloading.
As shown in Figure D-24, when idling, the platen lever open and close cam holds the platen lever in the direction of arrow a and the paper guide lever in the direction of arrow c. The auxiliary paper guide spring force holds the auxiliary paper guide in the direction of arrow e. When roll paper is inserted and the paper end detector detects the edge of the paper, the lever drive motor is started and the platen lever open and close guide operates. The platen lever spring holds the platen lever in the direction of arrow b. The paper guide lever spring holds the paper guide lever in the direction of arrow d while the paper feed motor drives and starts semi-
Paper feed unit
Main frame
Roll paper feed gears
Paper feed motor
J/S change assembly
Release lever
Rev. B Product Overview Appendix D-15
Confidential
autoloading. The semi-autoloaded paper roll passes through the paper path past the platen lever, and then passes to the front side of the platen to be guided to the auxiliary paper guide. It is guided outside the paper feed unit after passing the area where the paper feed roller and paper pressing roller are pressed together. The roll paper that has passed out of the paper feed roller is directed up by the protrusions in center of assist paper guide, and the assist paper guide is rotated in the direction of arrow f and is closed. (See Figure D-25.)In this configuration, you cannot insert roll paper to the paper feed roller in slip mode.
Figure D-24
Roll paper
Protrusions
Assist paper guide
Paper hold roller
Paper hold roller shaft
Paper guide roller
Sub paper feed roller
Sub paper feed shaftPaper end detector
Paper feed roller shaft
Paper feed frame
Guide roller
Platen
Platen lever
Paper feed lever center shaftPaper guide lever
Sub paper hold roller
a
b
cd
e
f
Appendix D-16 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Figure D-25
Paper feed operation
The power from the paper feed motor is transmitted to the paper feed roller and sub paper feed roller using the following set of gears.
1. Paper feed motor gear
2. Paper feed transmission gear
3. J/S change gear
4. Paper feed reduction gear
5. Take-up drive gear
6. Paper feed gears
Roll paper
Protrusions
Assist paper guide
Paper hold roller
Paper hold roller shaft
Paper guide roller
Sub paper feed roller
Sub paper feed shaftPaper end detector
Paper feed roller shaft
Paper feed frame
Guide roller
Platen
Platen lever
Paper feed lever center shaftPaper guide lever
Sub paper hold roller
Rev. B Product Overview Appendix D-17
Confidential
The paper feed rollers and paper hold rollers and the sub paper feed rollers and sub paper hold rollers are pressed together. They feed the roll paper that has been fed by the roll paper insert operation. (See Figure D-26.) The paper feed roller feeds paper the prescribed amount, but the sub paper feed roller is set to a paper feed amount that is slightly less than that amount. The difference in feed amounts is built into the sub paper feed roller. (See Figure D-27.) The sub paper feed clutch spring and related parts slip to prevent slack in the roll paper.Figure D-26
Figure D-27
Roll paper
Paper feed roller
Paper feed gears
Paper feed reduction gear Paper feed transmission gear
Paper feed motor gear
Paper feed motor
J/S change gear
Take-up drive gear
Sub paper feed rollerSub paper feed shaft
Sub paper hold roller
Sub paper hold roller shaft
Paper hold shaft
Paper hold roller
Paper feed shaft
Guide rollers
Guide roller shaft
Sub paper feed roller
Sub paper feed shaft
E-ring
Sub paper feed clutch spring
Sub paper feed roller holder
E-ring
Appendix D-18 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Roll Paper take-up mechanism
This mechanism consists of a take-up frame, take-up drive gear, take-up belt, take-up gear, take-up pulley, take-up clutch, and take-up shaft, all of which ensure stable take-up operation. (See Figure D-28.)
Figure D-28
Take-up drive gear
Take-up belt
Main frame
Take-up pulley Take-up gear
Take-up frame
Take-up shaft
Paper feed unit
Rev. B Product Overview Appendix D-19
Confidential
Take-up operationThe take-up drive force for the printed roll paper is supplied by the paper feed motor, and is sequentially transmitted to the take-up shaft by the paper feed transmission gear, J/S change gear, paper feed reduction gear, take-up drive gear, take-up belt, take-up pulley, take-up clutch, and take-up gear. (See Figure D-29.) Take-up force is transmitted to the take-up shaft by the movement of the take-up clutch spring between the take-up pulley and take-up gear. This rotates the take-up shaft in the direction indicated by arrow a, winding up the printed paper roll.
Figure D-29
Take-up shaft
Take-up beltTake-up drive gear
Paper feed reduction gear
J/S change gear
Paper feed transmission gear
Paper feed motor gear
Take-up pulley(Take-up clutch) Take-up gear
Take-up frame
a
Appendix D-20 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Clamshell mechanism
The clamshell mechanism consists of a paper feed unit, paper feed frame shaft, and paper feed frame fixing lever. This mechanism is used in the event of a quality problem, such as a paper jam.
Figure D-30
Opening mechanism
1. Press the on the two paper feed frame fixing levers (indicated by "arrow a" in Figure D-30).
2. The paper feed frame fixing lever comes off the main frame, allowing the entire paper feed unit to rotate on the paper feed frame shaft. (See Figure D-31.)
3. Rotate the entire paper feed unit approximately 90° in the direction indicated by arrow b. (See Figure D-31.)
Paper feed unit Paper feed frame fixing levers
Paper feed frame shaft
Main frame
Rev. B Product Overview Appendix D-21
Confidential
Figure D-31
Closing mechanism
1. When a paper jam or other problem has been fixed, rotate the entire paper feed unit in the opposite direction from when the mechanism was opened.
2. Lightly press down on the upper part of the paper feed unit to lock the paper feed frame fixing lever to the main frame.
Paper feed unit
Paper feed frame shaft
Main frame
b
Appendix D-22 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Roll paper release operation
The roll paper release operation lets you remove pieces of roll paper that still remain when you are replacing roll paper. You can use this when there are paper jams or when you are removing pieces of paper.
The paper is released by operating the release lever beside the paper feed motor on top of the paper feed unit. The end of the release lever is located very near the paper hold roller. When you push the part of the lever labeled "PUSH" in the direction indicated by arrow b, the paper hold roller on the paper hold roller shaft is moved in the direction indicated by arrow a, releasing the connection with the paper feed roller, releasing any paper in between.
Figure D-32
Roll paper
Release lever
Paper release lever shaft
Paper hold roller spring
Paper hold roller spring
Paper hold roller
Paper feed roller
Paper hold roller shaft
Paper feed roller shaft
Paper feed frame
PUSH
b
a
Rev. B Product Overview Appendix D-23
Confidential
Specifically, the release lever is provided by the paper feed motor and very near the paper hold roller shaft to remove paper that interferes with the contact between the paper hold roller and paper feed roller. When you push the part of the release lever labeled “PUSH” in the direction indicated by arrow b, the release lever rotates around the pivot in the direction of arrow c, and the end of the release lever pushes out the end of the paper hold roller shaft in the direction indicated by arrow a. After the paper is released, the paper hold roller and release lever are returned to their original positions by two paper hold roller springs built into both ends of the paper hold roller shaft.Figure D-33
b
a
Roll paper
Roll paper
Paper feed frame
Release lever pivot point axis
Release leverPaper hold roller
Paper holdroller axis
Paper hold roller spring
"PUSH"
c
Appendix D-24 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Slip Feed Mechanism
The slip feed mechanism is comprised of the following parts:
Form stopper
Sub slip feed lever
Sub slip feed roller
Sub slip hold roller
Slip feed roller
Slip hold roller
Paper feed motor and wheel
Positioning slip paper
The slip paper path is normally interrupted by the form stopper, located perpendicular to the path, which is held in place by the form stopper spring. When a slip is inserted along the right edge of the slip guide lower frame in the direction indicated by the arrow, the slip paper goes in as far as the form stopper and is positioned. (See Figure D-34.)
When the paper feed motor rotates several times forward and reverse while energizing the J/S change solenoid, the J/S change lever will switch the J/S change gear that had been engaged with the roll paper feed gear so that it is engaged with the slip paper feed gear. (See Figure D-35.)
Figure D-34
Paper feed trigger attraction plateLever drive camSlip feed roller
Slip hold rollerSub slip hold roller
Slip guide upper frame
Slip paper
Slip guide lower frame
Sub slip feed roller Sub slip feed lever
Lever drive coil
Form stopper
T.O.F. detector assembly
B.O.F. detector assembly
ab
Rev. B Product Overview Appendix D-25
Confidential
Figure D-35
Paper feed reduction gear
Main frame
Paper feed reduction gear
J/S change gear
J/S change lever
J/S change solenoid
Appendix D-26 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
When the T.O.F. detector and B.O.F. detector determine that a slip has been inserted, the lever drive coil is energized while the lever drive motor is rotated. At this time, the linkage between the paper feed trigger attraction plate and lever drive ratchet wheel is disconnected, the lever drive shaft and lever drive cam rotate, and the sub slip feed lever moves in the direction indicated by arrow a. (See Figure D-34.) This pushes up the sub slip feed roller, compressing the sub slip hold roller. At the same time as this, the sub spring feed lever moves the form stopper in the direction indicated by arrow b (See Figure D-34), completing preparations for feeding the slip away from the form stopper slip path. (See Figures D-34, 36.)Figure D-36
After this, the paper feed motor is rotated a number of steps corresponding to the slip paper format in the direction indicated by the arrow. The rotation force is transmitted to the slip feed roller and sub slip feed roller by the gears, positioning the slip paper at the top. (See Figure D-37.)
Lever drive transmission gear
Lever drive gear
Sub slip hold roller
Sub slip feed roller
Sub slip feed lever
Form stopper
Lever drive shaft
Lever drive motor
Paper feed trigger attraction plate
Lever drive cam
Lever drive rachet wheel
Platen lever drive cam
Lever drive coil
Rev. B Product Overview Appendix D-27
Confidential
Figure D-37
Slip paper printing and paper feed operation
After the slip is positioned, printing can be performed. The paper feed motor drives the slip feed roller upon the completion of printing of one line, feeding the paper the prescribed distance. The slip paper can be fed forward or reverse by controlling the energizing signal of the paper feed motor.
The slip feed mechanism gear assembly is comprised of the following parts:
Paper feed motor gear for paper feed motor
Paper feed transmission gear
J/S change gear (J/S change solenoid engages this with the slip paper feed gear)
Paper feed reduction gear
Slip transmission gear
Slip drive gear
The driving force of the paper feed motor is transmitted to the slip feed roller and slip hold roller simultaneously via the gears, creating the force to feed the slip paper on the front and on the back.
Slip drive gears
Slip drive gearsJ/S change solenoid
J/S change lever
J/S change gear
Slip transmission gears
Paper feed motor gear
Paper feed transmission gear
Paper feed reduction gear
Paper feed motor
a
b
c
d
h
h
g
g
f
f
e
Appendix D-28 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
When the slip paper is fed forward, the respective gears rotate in the directions indicated by arrow a, arrow b, arrow c, arrow d, arrow e, and arrow f. This rotates the slip feed roller and slip hold roller in the directions indicated by arrows g and h, feeding the slip paper in the direction indicated by the arrow. When the slip paper is fed in the reverse direction, the operation is performed in the opposite direction. (See Figure D-37.)Validation Mechanism
Feeding validation paper
When you use validation paper, the force of the drive of the paper feed motor switches to the slip paper feed gear using the J/S change mechanism.
The open/close operation (see "Platen open and close operation") moves the platen lever frame in the direction of arrow a and the slip paper roller and platen are opened. Validation paper can be inserted from the top of the printer mechanism in this state. When the trailing edge of validation paper is detected, the detection signal is output. This signal is received, the lever drive motor is started, and the platen lever moves in the direction of arrow b (in Figure D-8). This causes the slip feed roller and the slip hold roller to grasp the validation paper. The platen closes to ensure the appropriate platen gap, and printing is possible. When the printing of one line of characters is completed, the paper feed motor is driven to rotate the slip feed roller to feed the validation paper the prescribed amount in the upward direction.
Ribbon Feed Mechanism
The ribbon feed mechanism is comprised of the following parts. (See Figure D-38.)
Transmission gear
Ribbon reduction gear
Ribbon drive gear
Ribbon intermediate gear
Ribbon take-up gear
Ribbon take-up shaft
The rotation of the carriage transmission pulley driven via the carriage transmission belt is used to feed the ribbon.
Rev. B Product Overview Appendix D-29
Confidential
This ribbon feed mechanism only feeds the ribbon when the head carriage assembly is moved from the right side to the left side.Figure D-38
Ribbon feed operation
When the carriage motor moves the head carriage assembly from the right side to the left side, the carriage transmission pulley rotates in the direction indicated by arrow A in Figure D-39. This driving force rotates the ribbon drive gear (planetary gear) in the direction indicated by arrow B via the transmission gear and ribbon reduction gear. At this time, the ribbon drive plate rotates in the direction indicated by arrow C around the ribbon reduction gear rotation shaft until the ribbon drive gear meshes with the ribbon intermediate gear.
Meshing of these gears transmits the driving force of the ribbon drive gear to the ribbon take-up gear via the ribbon intermediate gear, rotating the ribbon take-up shaft mounted at the top in the direction shown by arrow D. (See Figure D-39.)
The ribbon is fed when the ribbon feed roller in the ribbon cassette meshes with this ribbon take-up shaft.
On the other hand, when the head carriage assembly moves from left to right, the carriage transmission pulley rotates in the direction of arrow E, and the ribbon drive plate rotates in the direction of arrow F around the ribbon reduction gear rotation shaft. Consequently, the ribbon drive gear and ribbon intermediate gear no longer mesh, the ribbon take-up gear remains in place, and the ribbon is not fed.
Ribbon reduction gearTransmission gear
Carriage transmission pulley
Ribbon take-up shaft
Ribbon take-up gear
Ribbon intermediate gearRibbon drive gear
Head carriage set
Appendix D-30 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
The ribbon take-up gear has an internal one-way clutch, preventing it from rotating in the direction indicated by arrow G and this, in turn, prevents ribbon slack. (See Figure D-39.)Figure D-39
MICR Mechanism (Factory Option)
The MICR unit is comprised of the following parts (See Figure D-40.):
MICR head
MICR frame
MICR lever
MICR fixing
MICR solenoid
The MICR unit is located in the slip paper path.
B
F
C D G E
A
Transmission gear
Ribbon reduction gear
Ribbon take-up shaft
Carriage transmission pulley
Ribbon take-up gearRibbon intermediate gearRibbon drive plate
Ribbon drive gear
Rev. B Product Overview Appendix D-31
Confidential
MICR character reading, and printing on frontWhen using the MICR process, the force of the drive of the paper feed motor switches to the slip paper feed gear using the J/S change mechanism. A check is inserted just like any other slip. When a check is inserted along the right edge of the slip guide lower frame in the direction indicated by the arrow in the figure below, it is fed up to the form stopper and positioned.
After the T.O.F. and B.O.F. detectors determine that a check has been inserted, the sub slip feed roller and sub slip hold roller take hold of the check in an operation like that described for positioning the slip paper. This prepares for movement of the form stopper in the direction indicated by the arrow to feed the check. The MICR solenoid is then energized, moving the MICR lever in the direction indicated by the arrow, and the MICR fixing mounted to the MICR lever pushes the check against the MICR head.
Next, the paper feed motor rotates at the MICR reading speed in the same way as for slip paper feed, transporting the check. When the MICR characters on the check pass over the MICR magnet in front of the MICR unit, they are magnetized. The check is transported farther, and when the characters pass through the MICR unit, they are read by the MICR head, shown in Figure D-41.
In the event the MICR characters cannot be recognized during the MICR reading process, the check is ejected out the rear (see Note 1).
Upon completion of MICR reading, the check is fed to the position corresponding to the format for printing on the front of the check, and the head carriage assembly prints in the prescribed format on the front of the check. After printing, the check is fed forward and ejected, completing the operation. The slip feed roller rotates during the front printing process, feeding the check forward in the same way as for a slip (see Note 2).
Figure D-40
T.O.F. detector
Sub slip paper hold roller
MICR assembly
Slip guide upper frame
B.O.F. detector
Slip guide lower frameMICR fixing
MICR magnet
Sub slip feed rollerMICR lever
Form stopper
Check paper
Appendix D-32 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Note 1
Insert the check again if the MICR characters cannot be recognized the first time.
Note 2
When endorsement printing and printing on the front of the check are not performed, the check is fed forward and ejected upon completion of the MICR reading process.
Figure D-41
MICR lever
MICR head
MICR fixing
MICR lever
MICR solenoid
Rev. B Product Overview Appendix D-33
Confidential
Outline of CircuitsConnection of Units
This printer consists of the following main units:
Impact head
Impact mechanism drive unit
MICR head unit (factory option)
Main circuit board unit
Memory circuit board unit
Figure D-42
CN8
DKDDM
Memory circuit board(ROM, RAM)
I/F board
Power supply unit
Main circuit board assembly
Roll paper NE sensor
CN9 CN18
CN29 Switch
CN2
CN
22C
N5
CN
1C
N27
CN30CN28CN6
Control panel LEDs
Slip mechanism unit(paper feed, carriage, impact head)
CN
7
MICRhead
MICRsolenoid
Appendix D-34 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Circuit Block Diagram
In the circuit block diagram below, the circuit units in this printer are divided into main units.
Figure D-43
The circuit boards consist of the following units:
Main circuit board
Memory circuit board (the memory circuit board is soldered to the main circuit board and cannot be removed)
Interface circuit board (option)
CN18Power supply unit
VCCPower supply
5VPower supply
G/A
Memory board
Slip transport/carriage motor solenoids drive voltage supply
Impact head ,MICR head voltage supply
24VBPower supply
24VCPower supply
I/F board DM
SLIP paper feed
SLIP carriage
Sensor
Solenoid
Impact head
LED/SWDKD
U17
U14
QM3QM6
SW
Q45
Mechanism unit
(U30)CPU(U3)
CN
30C
N28
Rev. B Product Overview Appendix D-35
Confidential
Memory Circuit BoardAn outline of the memory board configuration and specifications is provided below.
Program ROM (flash memory, U508)
Font ROM (flash memory, U513)
Volatile RAM (SRAM, U509)
EEPROM for future expansion (electrically erasable NAND memory, U512)
Program Updates
Program downloads can be performed over communication lines (via the interface board).
Table D-2 Program ROM specifications
Item Specification
Application Mainly for storage of programs
Capacity Standard: 4 Mbit8 Mbits may be used, depending on specifications. Circuit also is compatible with 16 Mbits (reserved)
Access Speed 55 ns
Table D-3 Font ROM specifications
Item Specification
Application Mainly for storage of fonts
Capacity Standard: 4 Mbit8 Mbits may be used, depending on specifications. Circuit also is compatible with 16 Mbits (reserved)
Access Speed 55 ns
Table D-4 Volatile RAM specifications
Item Specification
Application Receive bufferPrint buffer
Capacity 1 MbitCircuit also is compatible with 2 Mbits (reserved), which can be used as external memory.
Access Speed 55 ns
Other SRAM is used.Flags and stacks use CPU internal RAM (256 bytes)
Table D-5 Specifications for the EEPROM for future expansion
Item Specification
Model TC5816BFT (Toshiba) etc.
Firmware Support Not determined
Appendix D-36 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Memory Map
Figure D-44
Main Circuit Board Unit
The main circuit board consists of the following elements:
CPU peripheral circuit
• CPU
• GA (gate array)
• Reset circuit
Slip mechanism drive function
• Impact head drive circuit
• Platen open/close, MICR drive circuit (MICR is factory option)
• Paper feed motor drive function
000000H
0003FFH000400H
1FFFFFH
400000H
4000FFH
800000H
8FFFFFH
F00000H
FFFFFFH
CPU I/O
RAM (EXT)
RAM (INT)
000C00H000BFFH
Gate Array
Font ROM4M or 8M
Program ROM4M or 8M
CS1=0
CS0=0
CS3=0
CS2=0
Rev. B Product Overview Appendix D-37
Confidential
• Lever function drive circuit (for paper feed path changeover)• MICR signal detection circuits (factory option)
• Detection circuits
Input circuit
• Logic power circuit
DIP switch read circuit
Control panel display drive circuit
Malfunction protective circuit
DM interface circuit
Appendix D-38 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
CPU and Peripheral Logic Circuits
CPU
CPU Terminals and Functions
Table D-6 CPU specifications
Item Specification
External Data Bus Width 16 bits
Internal Data Bus Width 32 bits
External Clock (root oscillation)
9.83 MHz
Bus Speed 19.66 MHz
Product Number TMP94C251F (Toshiba)
Internal RAM 256 bytes (used as stack area)
A/D Input Ports 7Four slip sensors (TOF detector, BOF detector, ejection detector, validation detector), and one each for MICR head reading, power source voltage monitoring, impact head thermistor voltage
D/A Output Port 1Carriage motor reference voltage
Table D-7 CPU terminals and functions
Port (Terminal) Pin Description Circuit Signal I/O I/O Definition
Name No. Name H L
DAREFH 1 VCC
DAREFL 2 GND
DAOUT0 3 For thermal PF, current setting THPF_DA OUT 5/256 0/256
DAOUT1 4 For impact CR, current setting CR_DA OUT 5/256 0/256
DVCC 5 VCC
PC0 6 Paper roll near end (common for HB/U175)
ROL_NE IN Paper detected
No paper
PC1 7 Paper end (roll paper) ROL_RE IN No paper Paper detected
PD0 8 Thermal PF_PHASE1 THPF_PH1 OUT
PD1 9 Thermal PF_PHASE2 THPF_PH2 OUT
PD2 10 Thermal PF_I01 THPF_I01 OUT
PD4 11 Thermal PF_I02 THPF_I02 OUT
PD5 12 Thermal PF_I11 THPF_I11 OUT
PD6 13 Thermal PF_I12 THPF_I12 OUT
DVSS 14 GND
PE0 15 DSW2-5 DSW2-5 IN OFF ON
Rev. B Product Overview Appendix D-39
Confidential
PE1 16 EP_TP EP_TP IN E/P timing pulse interrupt
PE2 17 SW_SLIP_PF SW_SLIP IN None Depressed
PE4 18 SW_RECEIPT_PF SW_RPT IN None Depressed
PE5 19 Receive DMA request receipt DREQ IN
PE6 20 Interrupt for synchronous serial input
SD_INT IN
PF0/TXD0 21 Serial TXD for asynchronous communication
TXD OUT
PF1/RXD0 22 Serial RXD for asynchronous communication
RXD IN
PF2/CTS0/SCLK0
23 Serial CLKIN/DTR for asynchronous communication
CLKIN IN
PF4/TXD1 24 Serial CLKREQ for asynchronous communication
CLKREQ OUT
PF5/RXD1 25 Serial CTS for asynchronous communication
CTS IN
PF6/CTS1/SCLK1
26 Serial IF_DET for asynchronous communication
IF_DET IN
DVCC 27 VCC
NMI 28 VCC connection VCC IN
P86/WAIT 29 HCTS HCTS IN
AM0 30 CPU mode setting (fixed to "1")
CLK 31 Not used NC
TEST0 32 Not used (GND fixed)
TEST1 33 Not used (GND fixed)
CLVSS 34 VSS
CLVCC 36 VCC
DVSS 37 GND
X1 38 9.83 MHz
X2 39 9.83 MHz
AM1 40 CPU mode setting (fixed to "0")
RESET 41 Hard reset RESET
WDTOUT 42 Abnormal detect (used by GA) TIMI
DVCC 43 VCC
PB0/CAS1 44 LED_ERROR LED_ERROR OUT On Off
PB1/UCAS1 45 LED_SLIP LED_SLIP OUT On Off
Table D-7 CPU terminals and functions
Port (Terminal) Pin Description Circuit Signal I/O I/O Definition
Name No. Name H L
Appendix D-40 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
PB2/HLCAS1 46 LED_PAPER LED_PAPER OUT On Off
PB3/HUCAS1 47 SEN_PWR (sensor power On/Off)
SEN_PWR OUT Power off Power on
PB4/WE1 48 PTLED_COM PTLED_COM OUT Power on Power off
PA0/CAS0 49 MICR plunger (+) MICR_SOL1 OUT
PA1/UCAS0 50 MICR plunger (-) MICR_SOL2 OUT
PA2/OE0 51 SLIP plunger (+) SLIP_SOL1 OUT
PA3/OE1 52 SLIP plunger (-) SLIP_SOL2 OUT
PA4/WE0 53 EP-Power ON/OFF EP_ON OUT
DVSS 54 GND
P85/CS5 55 CS spare CS_RES OUT
P84/CS4 56 EJM (electronic journal flash) CS_EJ OUT Not selected EJM selected
P83/CS3 57 GA CS_CG OUT Not selected Font selected
P82/CS2 58 ROM1 (external program) CS_PGM OUT Not selected Program selected
P81/CS1/RAS0 59 RAM CS_RAM OUT Not selected External RAM selected
P80/CS0 60 ROM2 (FONT) CS_GA OUT Not selected GA selected
DVCC 61 VCC
P76/BUSAK 62 M190 motor drive signal 1 EP_MOTOR1 OUT Not driven Driven
P75/BUSRQ 63 M190 motor drive signal 2 EP_MOTOR2 OUT Brake
P74 64 Solenoid drive 1 LEVER1 OUT Open Driven
P73 65 Solenoid drive 2 LEVER2 OUT Open Driven
P72/WRLH 66 External memory write (D8 15) WRH OUT
P71/WRLL 67 External memory write (D0 7) WRL OUT
P70/RD 68 External memory read RD OUT
DVSS 69 GND
P00/D0 70 External data bus D0 1 0
P01/D1 71 External data bus D1 1 0
P02/D2 72 External data bus D2 1 0
P03/D3 73 External data bus D3 1 0
P04/D4 74 External data bus D4 1 0
P05/D5 75 External data bus D5 1 0
P06/D6 76 External data bus D6 1 0
P07/D7 77 External data bus D7 1 0
DVCC 78 VCC
Table D-7 CPU terminals and functions
Port (Terminal) Pin Description Circuit Signal I/O I/O Definition
Name No. Name H L
Rev. B Product Overview Appendix D-41
Confidential
P10/D8 79 External data bus D8 1 0
P11/D9 80 External data bus D9 1 0
P12/D10 81 External data bus D10 1 0
P13/D11 82 External data bus D11 1 0
P14/D12 83 External data bus D12 1 0
P15/D13 84 External data bus D13 1 0
P16/D14 85 External data bus D14 1 0
P17/D15 86 External data bus D15 1 0
DVSS 87 GND
DVCC 88 VCC
DVSS 89 GND
P67/A23 90 External address bus A23 1 0
P66/A22 91 External address bus A22 1 0
P65/A21 92 External address bus A21 1 0
P64/A20 93 External address bus A20 1 0
P63/A19 94 External address bus A19 1 0
P62/A18 95 External address bus A18 1 0
P61/A17 96 External address bus A17 1 0
P60/A16 97 External address bus A16 1 0
DVCC 98 VCC
P57/A15 99 External address bus A15 1 0
P56/A14 100 External address bus A14 1 0
P55/A13 101 External address bus A13 1 0
P54/A12 102 External address bus A12 1 0
P53/A11 103 External address bus A11 1 0
P52/A10 104 External address bus A10 1 0
P51/A09 105 External address bus A9 1 0
P50/A08 106 External address bus A8 1 0
DVSS 107 GND
P47/A07 108 External address bus A7 1 0
P46/A06 109 External address bus A6 1 0
P45/A05 110 External address bus A5 1 0
P44/A04 111 External address bus A4 1 0
P43/A03 112 External address bus A3 1 0
P42/A02 113 External address bus A2 1 0
Table D-7 CPU terminals and functions
Port (Terminal) Pin Description Circuit Signal I/O I/O Definition
Name No. Name H L
Appendix D-42 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
P41/A01 114 External address bus A1 1 0
P40/A00 115 External address bus A0 1 0
DVCC 116 VCC
PZ0 117 DSW1-1 DSW1-1 IN OFF ON
PZ1 118 DSW1-2 DSW1-2 IN OFF ON
PZ2 119 DSW1-3 DSW1-3 IN OFF ON
PZ3 120 DSW1-4 DSW1-4 IN OFF ON
PZ4 121 DSW1-5 DSW1-5 IN OFF ON
PZ5 122 DSW1-6 DSW1-6 IN OFF ON
PZ6 123 EJ memory WP signal EJ_WP OUT
PZ7 124 Power source LED LED_POWER OUT ON OFF
PH4/INT0 125 For future expansion, currently pulled down
WAKE IN
PH0/TC0 126 DKD1 DKD1 OUT OFF ON
PH1/TC1 127 DKD2 DKD2 OUT OFF ON
PH2/TC2 128 Drawer sensor 1 DKDS1 IN Terminal 24V
Terminal GND
PH3/TC3 129 DSW1-7 DSW1-7 IN OFF ON
DVSS 130 GND
PG0/AN0 131 24 VDC monitor 24V_RD IN
PG1/AN1 132 Thermal head temperature (TH_THERM)
TH_THERM IN
PG2/AN2 133 Impact head temperature (IM_THERM)
IM_THERM IN
PG3/AN3 134 MICR data MIRD IN
PG4/AN4 135 TOF SLIP_TOF IN
PG5/AN5 136 BOF SLIP_BOF IN
PG6/AN6 137 Validation detector SLIP_VARI IN
PG7/AN7 138 Ejection detector SLIP_HAI IN
VREFH 139 VCC
VREFL 140 GND
ADVSS 141 GND
ADVCC 142 VCC
DAVSS 143 GND
DAVCC 144 VCC
Table D-7 CPU terminals and functions
Port (Terminal) Pin Description Circuit Signal I/O I/O Definition
Name No. Name H L
Rev. B Product Overview Appendix D-43
Confidential
Gate Array (GA)The GA for this printer mainly consists of a custom IC with the following functions. The GA is operated by external root oscillation (10 MHz).
Impact head drive function
General-purpose port and other functions
Table D-8 GA terminals and functions
Terminal Name
Pin No. Description
Circuit Signal Name Spec.
Meaning of H
Meaning of L
DREQ 1 DMA request DREQ DREQ
CLKREQ 2 Synchronous serial CLK_REQUEST
CLKREQ CLKREQ
VDD1 3 Fixed power source VCC VCC
CLKIN 4 Synchronous serial CLKIN/DTR CLKIN CLKIN
TXD 5 Synchronous serial TXD TXD TXD
RXD 6 Synchronous serial RXD RXD RXD
SD_INT 7 Synchronous serial SD_INT SD_INT SD_INT
RTS 8 Synchronous serial RTS RTS RTS
PC7 9 Port PC/MSL1 MSL1 IN Yes No
PC6 10 Port PC/MSL2 MSL2 IN Yes No
PC5 11 Port PC/MSL3 MSL3 IN Yes No
PC4 12 Port PC/DSW2-1 DSW2-1 IN DSW-OFF DSW-ON
PC3 13 Port PC/DSW2-2 DSW2-2 IN DSW-OFF DSW-ON
PC2 14 Port PC/DSW2-3 DSW2-3 IN DSW-OFF DSW-ON
VSS1 15 Fixed power source GND
PC1 16 Port PC/lever timing detector LEVER_DT IN Light received
Light blocked
PC0 17 Port PC/HB-R cover TH_R_COVER IN
PG7 18 Port PG/F cover F_COVER IN Open Closed
PG6 19 Port PG/R cover/HB unit sensor R_COVER IN Open Closed
PG5 20 Port PG/AC reset detector AC_RESET IN Stopped Operating
PG4 21 Port PG/M190 reset detector EP_RES IN Detected
PG3 22 Port PG/DSW2-6 DSW2-6 IN
PG2 23 Port PG/CR motor step-out detector
CR_MOT_DT IN Light blocked
Light received
PG1 24 Port PG/CR motor HP detector CR_MOT_HP IN Light received
Light blocked
SW24V1 25 24V enabler 1 24VSW1 OUT 24V supplied
24V interrupted
Appendix D-44 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
SW24V2 26 24V enabler 2 24VSW2 OUT 24V supplied
24V interrupted
PB7/HEAD9 27 Impact/shuttle head 9 SHEAD9 OUT Blocked Driven
VDD2 28 Fixed power source VCC
PA7/HEAD8 29 Impact/shuttle head 1 SHEAD1 OUT Blocked Driven
VSS2 30 Fixed power source GND
PA6/HEAD7 31 Impact/shuttle head 2 SHEAD2 OUT Blocked Driven
PA5/HEAD6 32 Impact/shuttle head 3 SHEAD3 OUT Blocked Driven
PA4/HEAD5 33 Impact/shuttle head 4 SHEAD4 OUT Blocked Driven
PA3/HEAD4 34 Impact/shuttle head 5 SHEAD5 OUT Blocked Driven
PA2/HEAD3 35 Impact/shuttle head 6 SHEAD6 OUT Blocked Driven
PA1/HEAD2 36 Impact/shuttle head 7 SHEAD7 OUT Blocked Driven
PA0/HEAD1 37 Impact/shuttle head 8 SHEAD8 OUT Blocked Driven
PI4/HEADCOM1
38 Impact head common changeover
HEADCOM1 OUT Driven Blocked
PI3/TIMI 39 Timer in input TIMI IN
VSS3 40 Fixed power source GND
PI2/HEADCOM2
41 Shuttle head common changeover
HEADCOM2 OUT Driven Blocked
PE5 42 CR motor I10 CR_I10 OUT
PE4 43 CR motor I20 CR_I20 OUT
PE3 44 CR motor I11 CR_I11 OUT
PE2 45 CR motor I21 CR_I21 OUT
PE1 46 CR motor PH1 CR_PH1 OUT
PE0 47 CR motor PH2 CR_PH2 OUT
PD7 48 Slip PF motor I10 PF_I10 OUT
PD6 49 Slip PF motor I20 PF_I20 OUT
PD5 50 Slip PF motor I11 PF_I11 OUT
PD4 51 Slip PF motor I21 PF_I21 OUT
PD3 52 Slip PF motor PH1 PF_PH1 OUT
VDD3 53 Fixed power source VCC
PD2 54 Slip PF motor PH2 PF_PH2 OUT
PD1 55 Slip PF motor HOLD PF_HOLD OUT HOLD
PD0 56 DSW1-8 DSW1-8 IN DSW-OFF DSW-ON
VSS4 57 Fixed power source GND
PI1/ 58 Lever drive motor (brake not required)
LEV_M1 OUT Not driven
Driven
Table D-8 GA terminals and functions
Terminal Name
Pin No. Description
Circuit Signal Name Spec.
Meaning of H
Meaning of L
Rev. B Product Overview Appendix D-45
Confidential
PI0/ 59 DSW2-4 DSW2-4 IN DSW-OFF DSW-ON
PE7 60 AC motor 1 AC_M1 OUT
PE6 61 AC motor 2 AC_M2 OUT
VDD4 62 Fixed power source VCC
XOUT 63 Oscillator output 10.0 MHz
XIN 64 Oscillator input 10.0 MHz
VSS5 65 Fixed power source GND
RESET 66 RESET input RESET
PJ0 67 EJ-Memory ALE EJ_ALE
PJ1 68 EJ-Memory CLE EJ_CLE
PJ2 69 EJ-Memory R/B EJ_R/B
TEST 70 GA test pin GND
A7 71 Address-7 A7
A6 72 Address-6 A6
A5 73 Address-5 A5
A4 74 Address-4 A4
A3 75 Address-3 A3
A2 76 Address-2 A2
A1 77 Address-1 A1
VDD5 78 Fixed power source VCC
A0 79 Address-0 A0
D7 80 Data-7 D7
D6 81 Data-6 D6
D5 82 Data-5 D5
D4 83 Data-4 D4
D3 84 Data-3 D3
D2 85 Data-2 D2
D1 86 Data-1 D1
D0 87 Data-0 D0
WR 88 Write WRL OUT
RD 89 Read RD IN
VSS6 90 Fixed power source GND
OUTH 91 OUTH OUTH OUT Always "H" after reset
NC2 92 VSS GND IN
Table D-8 GA terminals and functions
Terminal Name
Pin No. Description
Circuit Signal Name Spec.
Meaning of H
Meaning of L
Appendix D-46 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
GACS 93 GA CS CS_GA IN Not selected
GA selected
PH5/STB1 94 Thermal head strobe-1 TH_STB1 OUT Not selected
Block 1 selected
PH4/STB2 95 Thermal head strobe-2 TH_STB2 OUT Not selected
Block 2 selected
PH3/DI1 96 Thermal head block-1 DATA TH_D1 OUT Printed Not printed
PH2/DI2 97 Thermal head block-2 DATA TH_D2 OUT Printed Not printed
VSS7 98 Fixed power source GND
PH1/SCLK 99 Thermal head SCLK H_SCLK OUT Data input at leading edge
PH0/LAT 100 Thermal head DATA latch TH_LAT OUT Retained Latched
Table D-8 GA terminals and functions
Terminal Name
Pin No. Description
Circuit Signal Name Spec.
Meaning of H
Meaning of L
Rev. B Product Overview Appendix D-47
Confidential
Reset CircuitStable operation of the CPU and GA requires a certain reset period immediately after power up. All operations return to their initial status after the reset operation. The reset IC (U1) on this printer monitors the logic power source (VCC, Standard output: +5V), and sets the reset signal to LOW when the VCC is 4.2V or lower. The reset signal is restored from LOW to HIGH 50 ms after the VCC exceeds 4.2V. The CPU and GA operate normally after reset.
The main specifications of the reset IC are shown below:
Reset also can be performed by sending the reset signal from the host interface.
Table D-9 Reset IC specifications
Item Min. Typ. Max.
Detection Voltage (V) 4.0 4.2 4.5
Hysteresis Voltage (mV) 30 50 100
Delay Time (ms) 30 50 75
M/R Terminal "H" Voltage (V) 2.0 - -
Appendix D-48 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
The host interface reset signal (DSR signal and pin 25 input signal) is connected through DSW 2-7 and 2-8. When the reset signal (LOW) is applied here, the printer is reset. In the reset status, the CPU and GA are initialized, but the power remains on, and this status differs from when the power is turned on again. It is necessary to keep this in mind. The reset circuit is shown below.Figure D-45
VCC
RESET
DSW2-7DSW2-8
U1
PST596
M/R1
SUB2
GND3
VOUT4
VCC5
C30.1uF
12
Q1
DTA114EK
23
1DA1
DAP202
13
2
R210K
12
Rev. B Product Overview Appendix D-49
Confidential
Slip Mechanism Drive FunctionThe main functions of the slip mechanism are described below:
Impact head drive
Carriage motor drive
Paper feed motor drive
Lever motor drive
Lever drive
MICR solenoid drive circuit
MICR signal detection circuit
Detection circuits
Impact Head Drive
The impact head drive unit consists of the head solenoid drive and common drive. The head drive circuit diagram is shown below.
Figure D-46
VCC
CR_DET
THERM(103HT)
E/P E
HEAD #3
HEAD #6
GND
THERM(10K)
E/P D
E/P F
HEAD #7
E/P COM
HP_DET
HEAD COM(3,5,7)
E/P COM
E/P BE/P C
HEAD #1
VCC
HEAD #2
HEAD COM(1,2,9)
HEAD #5
E/P A
HEAD COM(8,4,6)
HEAD #4
E/P HE/P G
E/P COM
NC
HEAD #9
HEAD #8
COMMON (24V)
SHEAD5
SHEAD2
CR_HP
HH7
EP_D
SHEAD4
SHEAD1
SHEAD3
HH1
SHEAD8
HH9
EP_EEP_F
EP_H
HH2
SHEAD9
HH4
EP_C
HH5
EP_G
SHEAD6 HH6
HH3
EP_A
HH8
EP_B
SHEAD7
D7
1
34
D101
2
34
5
6
QM73
5
2
1
4
QM53
5
2
1
4
CN28
11
22
33
44
55
66
77
88
99
1010
1111
1212
1313
1414
1515
1616
1717
1818
1919
2020
2121
2222
2323
2424
2525
2626
2727
2828
2929
3030
QM43
5
2
1
4
Q12
1
23
D111
2
34
5
6
R451 2
R56
1 2
R48
1 2
QM6
8
6
4
2
9
7
5
3
101
R471 2
D6
1
34
QM3
8
6
4
2
9
7
5
3
101
QM23
5
2
1
4
R631 2
R541 2
R65
1 2
R521 2
D91
2
34
5
6
Q13
23
1
R611 2
Appendix D-50 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
The SHEAD 1-9 signal lines (LOW active) are on the left side. These signals are directly driven by the GA (directly connected to GA [U30]). Signals SHEAD 1-9 are input to the head drive (QM3, 6, Q12: All NPN Darlington transistors) via the print driver (QM2, 4, 5, 7, Q13: All PNP transistors). The driver is an NPN Darlington transistor. The driver is internally clamped at Vce = 60V ±10V by an internal Zener. The driver performs logical calculation at hgf>1000, providing adequate flow for one solenoid. To utilize the regenerative current of the head solenoid effectively, the regenerative current when the GND COMMON is turned off by D6, D7 is channeled to the solenoid. With this printer, the head drive signal is controlled by the GA, and at the same time, the COMMON (24V power source voltage side) is chopped, enabling efficient head drive. The chopping circuit is shown below:Figure D-47
The HEADCOM1 common drive signal driven by GA (U30) drives the Q7 MOSFET. Since it is necessary to drive Q7 at high speed (100 KHz or less), a speed-up circuit is added (Q47 periphery, pulls out electric gate load of Q7). The operating principle of the speed-up circuit is not described here. The relationship of the HEADCOM1 signal and SHEAD signals are shown below. The chopping cycle of the HEADCOM signal differs, depending on the voltage and temperature, but is virtually the same as the waveform in the diagram.
Figure D-48
24VB
HEADCOM1
R182
D6 D7
Q47
ZD1
D47
10KD48
R37
Q14
Q7
S H E A D 1 t o 9
H E A D C O M 1
Solenoid current
Rev. B Product Overview Appendix D-51
Confidential
Carriage Motor Drive CircuitThe carriage motor for this printer is a two-phase stepping motor. Constant-current drive is provided using 2-2 phase excitation as the drive method. Therefore, a dedicated constant-current drive chopping driver (U14, A2917SEB made by Alegrow) is used.
Figure D-49
Since the driver is of the constant-current type, the motor can be directly driven by setting the peak current. The peak current is set as described below, using the logical level of terminal I0 and I1.
At this time, VREF uses the DA output of the CPU (U3), and is set to an arbitrary value (0 - VCC) by firmware. RS is the resistance value (0.68 Ω) of R78 and R101. Accordingly, the current to the motor is calculated by the logic level of I0, I1 (judged by VREF1, 2 terminal voltage).
Table D-10 Logical level of terminal I0, I1 and output current
I0 I1 Output Current
L L VREF / (10 × Rs)
H L VREF / (15 × Rs)
L H VREF / (30 × Rs)
H H 0
24VC
VCC-PWR
M
CR_B-
CR_B-
CR_A+
CR_I11
CR_B+
CR_A-
CR_PH2
24VSW1
CR_I10
CR_PH1
CR_A+
CR_DA
CR_I21CR_I20
CR_A-
CR_B+
R97
R83
Q18
U14
OU
T1A
6E
15
SE
NS
E1
4O
UT
1B3
I10
2I1
11
VR
EF
144
PH
AS
E1
43E
NA
BLE
142
RC
141
LOG
IC S
PLY
40
OU
T2A
18E
219
SE
NS
E2
20O
UT
2B21
LOA
D S
PLY
22I2
023
I21
24V
RE
F2
25P
HA
SE
226
EN
AB
LE2
27R
C2
28
G29
G30
G31
G32
G33
G34
G35
G36
G37
G38
G39
G17
G16
G15
G14
G13
G12
G11
G10
G9
G8
G7
C45
R99
R78R81
C126
R100C47
D19
D18D14
C48
D15
C46R101
C36
C34
Appendix D-52 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
The drive signal to drive the phases is sent at the logical level of the PHASE1, 2 terminals. The motor driver cannot operate unless signal 24VSW1 in the circuit diagram is set to HIGH (controlled by the GA). When this signal is at a status other than HIGH, IC consumption is 0, and no electricity goes to the motor.Slip Paper Feed Motor Drive Circuit
The slip paper feed motor is two-phase stepping motor. The driving method is 1-2 phase excitation during acceleration and deceleration, and constant-current drive is performed with 2-2 phase excitation. Therefore, a dedicated constant-current drive chopping driver (U17, A2917SEB made by Alegrow) is used.
Figure D-50
The circuit configuration is the same as the carriage motor driver, but the current setting is fixed, and is changed between two levels by the output (PF_HOLD) of the GA (U30) port. The current calculation procedure is described below.
Current = VREF/(10 Rs)
RS: 1Ω
VREF: VCC or voltage obtained by voltage division ratio of R105 and R106.
As for the carriage motor drive circuit, the driver IC is operated by setting the 24VSW1 signal HIGH.
VCC-PWR
24VCVCC
24VC
M
SLIP-PF
PF_I21PF_A+
PF_A-
PF_B+
PF_B-
PF_I11
PF_PH2
PF_PH1
PF_HOLD
24VSW1
R10211W1%
12
R117
1K
1 2
C54
47uF6.3V
PN
R10375K
12
U17A2917SEB
OU
T1A
6E
15
SE
NS
E1
4O
UT1
B3
I10
2I1
11
VR
EF
14
4P
HA
SE
14
3E
NA
BL
E1
42
RC
14
1L
OG
IC S
PL
Y4
0
OU
T2A
18
E2
19
SE
NS
E2
20
OU
T2B
21
LO
AD
SP
LY
22
I20
23
I21
24
VR
EF
22
5P
HA
SE
22
6E
NA
BL
E2
27
RC
22
8
G29
G30
G31
G32
G33
G34
G35
G36
G37
G38
G39
G17
G16
G15
G14
G13
G12
G11
G10
G9
G8
G7
C573300pF
12
D29EC10QS061
2
R104
1K
1 2
R11875K
12
C493300pF1
2
D26EC10QS06
12
D30EC10QS061
2
R11911W1%
12
R1133.3K 1
2
C55470pF
12
D27EC10QS06
12
C560.1uF
12
C50470pF
12
R10568K1%
12
R106
30K1%
12
+
-U16BNJM2904M
5
67
Q30
DTC114EK
23
1C530.1uF
12
+
- U16ANJM2904M
3
21
84
Q18
DTC114EK
23
1
Rev. B Product Overview Appendix D-53
Confidential
Lever Motor Drive CircuitThis printer has a DC type lever motor for the purpose described below.
Adjustment of paper path changeover timing
Adjustment of shaft rotation position
Rotation of the lever motor starts changeover of the paper path and the platen open/close operation. An NPN Darlington transistor is used for lever motor drive. Due to the structure of the lever motor, a brake circuit is not required. The lever motor is driven using the ELV_M1 output signal from the GA.
The lever motor rotates when LEV_M1 = LOW. The motor cannot be driven when the VCC-PWR is not being supplied. Furthermore, the Q41 NPN Darlington transistor incorporates a CE Zener to perform kickback protection.
Figure D-51
VCC-PWR
24VC
LEV_MOT2
LEV_M1
LEV_MOT1
D57 R116
D32
Q39Q41
CN30
123456789101112131415161718192021222324252627282930
Appendix D-54 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Lever Drive Circuit
This printer has two levers to drive the mechanism. The lever motor rotation enables lever A and lever B to function. This controls the mechanism.
Lever A and lever B are solenoids driven by 24V. Simple drive of lever A and lever B is performed by an NPN Darlington transistor. LEVER1 and LEVER2 are output signals from the CPU.
• Lever A: Driven by a LOW level of the LEVER1 signal
• Lever B: Driven by a LOW level of the LEVER2 signal
Figure D-52
VCC
24VC
LEVERLEVER1
LEVER2LEVER-ALEVER-B
CN30
123456789101112131415161718192021222324252627282930
Q43
Q54
R175
D17
R174D44
Q42 Q53
D21
Rev. B Product Overview Appendix D-55
Confidential
MICR Solenoid Drive Circuit (Factory Option)This printer can have an optional MICR mechanism. MICR reading is performed when a check is inserted. The MICR solenoid is a locking solenoid that uses a permanent magnet, and performs the following operations:
• During Operation: Driven by 24V, held by permanent magnet
• Reset Status: 13V applied in opposite direction of operation, releasing hold status
Figure D-53
To control the MICR solenoid, it is necessary to apply two voltage levels (24V, 13V) in opposite directions. Therefore, the MICR solenoid has a complicated circuit configuration. The MICR solenoid is driven by MICR_SOL1 and MICR_SOL2 (output signals from the CPU). MICR_SOL1 determines the direction in which electricity is sent, and MICR_SOL2 drives the MICR solenoid. The logic is described in the following table.
Table D-11 MICR_SOL1, 2, and MICR
MICR_SOL1 MICR_SOL2 MICR Solenoid Status
H L Drives MICR solenoid. Pulled to magnet side in this status.
L L Drives MICR solenoid. Status where it attempts to reset.
H H Not driven, regardless of MICR_SOL1 logic.
L H
24VC
VCC
13V
MICR_SOL2
M_SOL1M_SOL2
MICR_SOL1
R213
Q31
Q32
R214
C51
R233 R112
D55
CN27
12
R232
QM8
R110
D63
U29
Q36
D28
D25
Q28
C52
R111
Q57
Q33
D56
U15
G
IO
R107
D31
D62
Q37
D54
Appendix D-56 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
The MICR solenoid is not driven when MICR_SOL2 is HIGH. MICR_SOL1 is the solenoid drive signal. This is to prevent a short when the transistors go on at the same time.The MICR solenoid drive circuit is shown below.
Figure D-54
MICR reader operating principles
MICR stands for “magnetic ink character recognition.” Unlike conventional printing ink, magnetic ink includes iron powder or some other magnetic element, which gives the ink itself magnetic properties.
Application of a magnetic field on one side of characters printed in magnetic ink on a check causes the characters to be magnetized, as shown in the illustration below.
Figure D-55
24V 13V
MICR_SOL1
MICR_SOL2
QM8(7)NPN
QM8(9)NPN
Q28PNP
Q32
PNP
INV
3 4
INV
34
INV
3 4 1 2 12
SS
S
S
S
SS
N
N
N
NNN
SS
SSSSSS
SSSSSS
SSSS
NN
NN
NN
NN
NN
N
NN
NNN
Check paper movement
Rev. B Product Overview Appendix D-57
Confidential
The magnetic reader head recognizes the magnetized characters as shown below.The voltage waveform output from the magnetic reader head is different for each character, making it possible to recognize each individual character.
Detection Circuits
This printer has detection circuits for paper and various mechanisms. The detection functions are described in the table below.
Figure D-56
Figure D-57
Table D-12 Detection circuits
Detector FunctionType of Sensor Circuit
TOF Slip detection Transparent photo
Voltage drop of load resistor (R69) is read by the AD port of the CPU
BOF Slip detection Transparent photo
Voltage drop of load resistor (R68) is read by the AD port of the CPU
Paper ejection
Slip detection Reflective photo
Voltage drop of load resistor (R66) is read by the AD port of the CPU
Validation Slip detection Reflective photo
Voltage drop of load resistor (R68) is read by the AD port of the CPU
Paper Insertion
Paper roll detection
Reflective photo
Logical judgment of voltage drop of load resistor (R147)
Near Paper End
Paper roll detection
Microswitch Logical judgment of switch status by the CPU port.
Voltage Power source voltage
Voltage potential divider
Potential divider ratio of 24V power source voltage 1/7.2 (R71, R76) is read by the AD port of the CPU
I
V
S S N N S SN N
0 1
Appendix D-58 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Impact Head Temperature
Head temperature
Thermistor VCC potential voltage ratio of thermistor resistance value and R72 is read by the AD port of the CPU
Thermal Head Temperature
Head temperature
Thermistor VCC potential voltage ratio of thermistor resistance value and R126 is read by the AD port of the CPU
Carriage Motor Step-Out
Mechanism Transparent photo
Base of Q50 is driven by voltage drop of load resistor (R90); phase data with no delay is taken out; and logical judgment is performed by the GA port
Home Position
Mechanism Photo IC Logical judgment of photo IC output is performed by the GA port
Lever Timing Detector
Mechanism Photo IC Logical judgment of photo IC output is performed by the GA port
Front Cover Case Transparent photo
Logical judgment of load resistor (R88) voltage drop is performed by GA port
Rear Cover Case Transparent photo
This signal is used for thermal unit sensor
Rear Cover TM-H6000
Case Photo IC Logical judgment of photo IC output is performed by the GA port
EP Timing Pulse
EP unit Tacho-gene Waveform shaping (Q19) of sine wave output, and processing by the CPU interrupt port with hysteresis (U28)
EP Reset EP unit Read switch Logical judgment of the GA port with time constant
DIPSW DIPSW Pull-up by resistor group (RM1, 2, 3, 4). "L" is read at On. Logical judgment is performed by the CPU, GA
Table D-12 Detection circuits
Detector FunctionType of Sensor Circuit
Rev. B Product Overview Appendix D-59
Confidential
Input CircuitsLogic Power Source Circuit
The logic power source circuit generates the power for this printer. The CPU, GA, and most other circuits do not operate if voltage is not output by the logic power source circuit. The power source circuit has an input of 24V, and uses a dedicated DC/DC converter IC (U11: PQ1CZ1) to output 5V ± 4%.
Figure D-58
The output voltage is determined by the potential division of R82 and R85. In other words, the circuit operates so that the crossover voltage of R82 and R85 is 1.26 V.
The input voltage of 24V for the power supply circuit is supplied to U11 through the R2 fuse resistor (KOA RF73B2HTE0.51). R3 may burn out in the event of a malfunction in the U11 area. R3 will also burn out in the event of excessive VCC voltage (approx. 7.5 V or more). This fuse resistor cannot be replaced. Therefore, the circuit cannot be repaired by replacing the R3 in the event it has burned out due to a circuit malfunction.
Table D-13 Power source specifications
Item Min. Typ. Max. Remarks
Output Voltage (V) 4.85 5.04 5.24
Output Current (A) - - 1.0
Input Voltage (V) 21.6 24 26.4
Over-Current Protection (A)
1.55 2 2.6 L2, D13, C35 not provided. The peak current is detected, and detected voltage is lowered. Automatic reset.
Over-Voltage Protection (V)
7.5 CY1 goes On after detection, and R3 burns out. Does not reset.
VCC
AVCC
24VB
R253
C35C38
R3
U11
PQ1CZ1
VIN1
VOUT2
COM3
ADJ4
ON/OFF5
G6
L2
D13
C37
CY1
ZD3L1
R82
C155
R85
Appendix D-60 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Rush Current Control Circuit
The rush current control circuit controls rush current when the power source is turned on. This printer has large-capacity condensers to facilitate stable operation of mechanism drivers and circuits. Therefore, an excess of rush current is generated when the power is turned on. This circuit controls the rush current.
The CN18 external power source is connected to the CN19 switch. Q61 is Off when the switch is turned On. Accordingly, the current that flows when the switch is turned on is supplied to the respective parts via the power thermistor (TH1). The power thermistor controls the input current with an in-line resistor (room temperature: 2.2 Ω). When the printer circuit begins to operate, GA (U30) output OUTH is HIGH, and Q61 goes On. This bypasses TH1.
The OUTH signal is connected to the RESET signal internally by the GA, causing TH1 to be bypassed when RESET is HIGH.
The power thermistor (TH1) has high resistance at room temperature, but the resistance value decreases with heat generated by current flow. The power thermistor immediately begins to heat up when 24V is turned on, but cools down when it is bypassed at the time the circuit begins to operate, regaining its high resistance. Accordingly, it controls the rush current when the power source is turned on again.
Figure D-59
24VB
OUTH
SIN2-1
PIN1MIN1
CN18
123
SH
F1
C41
CN29
12
Q62
Q61
TH1
D70
R244
R245
C44C43C42
D16C40
L3
Rev. B Product Overview Appendix D-61
Confidential
Switch CircuitThe 24V supplied from the external power source is supplied to the required locations in this circuit. The supply power source and application are described below. The 5V system is controlled by the same switch. The circuit is configured with a MOSFET semiconductor switch. Q44 is a 2-element MOSFET that turns the VCC_PRW and VCC_SEN on and off.
Figure D-60
Table D-14 Switch circuit
Type (circuit network name)
Switch(On/Off) Control Application
24VB OUTH GA (U30) Impact head drive power source, MICR read circuit power source. Supplied via TH1 when other than OUTH = HIGH status. Can only be turned off with power switch.
24VC 24VSW1Turned on and off by Q45
GA (U30) Slip mechanism power source.
24V(DM) None None DM power source, DK power source.
VCC None None Started after power switch is turned on.
VCC-PWR 24VSW1Turned on and off by Q44
GA (U30) 5V used by slip mechanism.
VCC_SEN SEN_PWRTurned on and off by Q44
CPU (U3) Power source for slip system paper detection sensor.
24V(DM)
24VB
24VC
24VA
VCC
VCC-PWR2
VCC
VCC-PWR
SIN2-1
SIN2-1
MIN1
24VSW1
FG
PIN1
24VSW2
24VSW1
VCC_SEN
SEN_PWR
CN18
123
SH
F1
C41
CN29
12
Q24
Q61
TH1
Q46
Q45
R96
R244
R176
C44C43C42
D16
Q59
D1D2G S
D3D4
Q17R243
F2
F3
R177D45
C40
L3
R94
D22
Q60
Q44
S1G1S2G2 D2
D2AD1A
D1
Q51
R207
R208
Appendix D-62 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Control Panel Functions
This printer has four LEDs and two input switches.
Display Functions
The LED displays are shown below. The CPU (U3) controls them.
The circuit configuration is shown below. All lamps turn on when the signal outputs the HIGH status.
Figure D-61
Types of Switches
The printer has two switches. As shown by the circuit for the display functions in the previous section, input is enabled by two signals (SW_SLIP, SW_RPT). LOW status is input when the panel switch is pressed. HIGH is input when the switch is not pressed.
Table D-15 Types of displays
Circuit Signal Color Application
LED_POWER Green Lights during normal operation
LED_ERROR Red Indicates printer error
LED_PAPER Red Indicates printer paper status
LED_SLIP Green Indicates slip selection
VCC
VCC
LED_PAPER
LED_SLIP
LED_ERROR
LED_POWER
SW_RPT
SW_SLIP
C13C14
CN6
12345678
Q3
Q4
Q6
R178
R30 R31
R28
R179
R181
R29R180
Q58
Rev. B Product Overview Appendix D-63
Confidential
Malfunction Protective CircuitThis printer has the following three malfunction protection functions:
GA operation monitor
The CPU (U3) monitors GA clock oscillation. The CPU firmware reads a specific GA register at an arbitrary time, and compares that value with the value previously read. If the results of the comparison are different, the system is judged to be operating normally. The GA changes the register value using clock oscillation. Therefore, if it is operating normally, the register value continuously changes.
CPU operation monitor
CPU runaway causes a WDT (watch dog timer) overflow, resulting in output of LOW status from the CPU WDT output terminal. This is connected to the GA TIMI input terminal, and when the GA detects the LOW status for a certain time, it goes to the reset status and is not restored.
Mechanism malfunction monitor
When the thermal head becomes abnormally hot, the GA TIMI input terminal goes LOW, and the GA is reset and is not restored. The firmware judges this as a GA malfunction, and processes it as an unrecoverable error.
GA TIMI input terminal also goes LOW when the impact head becomes abnormally hot, causing the GA to go to the reset status, which will not be restored. The firmware judges this as a GA malfunction, and processes it as an unrecoverable error.
Appendix D-64 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Interfaces
This printer has a variety of interfaces. There is a dedicated connector (CNB) for the EPSON customer display. A general-purpose drawer can be connected to CN9 and used. The optional interface board allows communication with more interfaces.
Interface Boards
This printer can accommodate an exchangeable interface board. The following types of interface boards can be installed. As new interfaces are developed, they may become available for this printer.
UB-S01 (RS-232C interface)
UB-S02 (RS-485 interface)
UB-P02 (IEEE-1284 interface)
DM
The EPSON DM series customer display can be connected to CN8. However, the DM can only operate with CN8 when the UB-S01 serial interface is used.
The UB-U01 interface board has a dedicated DM connector that can be used.
DKD
A general-purpose drawer can be used.
Rev. B Product Overview Appendix D-65
Confidential
Important PartsFuses
Table D-16 Fuses
Fuse Function Standard
Fuse F1 Main fuse, provided for safety purposes. Fuse may burn out when input circuit is unsafe.Make sure to use the same type of fuse when it is replaced. Replace the fuse after eliminating the cause of the burn out. Burn out may lead to a malfunction.
R452003 Littelfuse Inc.
Fuse F2 Used to protect against unsafe circuit elements. It will burn out in the event of a circuit board problem. The problem cannot be corrected by replacing the fuse.It may burn out due to an unsafe 24VC line. Replace the fuse after eliminating the cause of the burn out. Burn out may lead to a malfunction.
R451002 Littelfuse Inc.
Fuse F3 Fuse provided for safety standard compliance. Does not relate to operation. Will burn out for short of power line after DM connection.
SSFR-S2.0A-F002 SOC CO Ltd
Fuse F4 Used to protect against unsafe circuit elements. It will burn out in the event of a circuit board problem. The problem cannot be corrected by replacing the fuse.Replace the fuse after eliminating the cause of the burn out. Burn out may lead to a malfunction.
ICP-S1.0 ROHM ELECTRONICS
Fuse R3 Used as safety protection for the logic power source circuit. It may burn out due to a logic power circuit problem or excessive VCC voltage. Replace the fuse after eliminating the cause of the burn out. Burn out may lead to a malfunction.
RF73B2HTD0.51OHMJ KOA Corp.
Appendix D-66 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
DIP Switch Settings
Serial Interface Specifications
DIP Switch 1
bps: bits per second
Table D-17 DIP switch 1 settings
Switch No. Function ON OFF
1 Data receive error Ignored "?" printed
2 Receive buffer capacity 45 bytes 4KB
3 Handshake XON/XOFF DTR/DSR
4 Bit length 7 bits 8 bits
5 Parity check Yes No
6 Parity selection Even Odd
7 Baud rate selection See table below
8
Table D-18 Baud rate selection
Transfer Rate Switch No.
[bps] 7 8
2400 ON ON
4800 OFF ON
9600 ON OFF
19200 OFF OFF
Rev. B Product Overview Appendix D-67
Confidential
DIP Switch 2Table D-19 DIP switch 2 settings
Switch No. Function ON OFF
1 Handshake operation (BUSY condition) Receive buffer full Offline or receive buffer full
2 Customer display (DM-D) connection Connected Not connected
3 Printing line count selection Multi Standard
4 TM-U375 print width compatibility mode Compatible Not compatible
5 Used internally - Fixed to OFF
6 Used internally - Fixed to OFF
7 Pin 6 reset signal Enabled Disabled
8 Pin 25 reset signal Enabled Disabled
Table D-20 TM-U375 print width compatibility mode settings
SW2-4 SW2-3 Font/Character Dot Spacing Printing Line Count Total No. of Dots
ON OFF 5 x 9/1 half dot 33 lines 400 half dots
7 x 9/3 half dots 40 lines
ON 5 x 9/1 half dots 35 lines 385 half dots
7 x 9/2 half dots 42 lines
Appendix D-68 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Parallel Interface Specifications
DIP Switch 1
DIP Switch 2
Table D-21 DIP switch 1 settings
Switch No. Function ON OFF
1 Auto carriage return Enabled Disabled
2 Reception buffer capacity 45 bytes 4KB
3 Reserved - Fixed to OFF
4 Reserved - Fixed to OFF
5 Reserved - Fixed to OFF
6 Reserved - Fixed to OFF
7 Reserved - Fixed to OFF
8 Reserved - Fixed to OFF
Table D-22 DIP switch 2 settings
Switch No. Function ON OFF
1 Handshake operation (BUSY condition) Receive buffer full Offline or receive buffer full
2 Not used (DM-D connection) - Fixed to OFF
3 Printing line count selection Multi Standard
4 TM-U375 print width compatibility mode Compatible Not compatible
5 Used internally - Fixed to OFF
6 Used internally - Fixed to OFF
7 Reserved (dedicated serial I/F) - Fixed to OFF
8 #31 pin reset signal Fixed to ON -
Table D-23 TM-U375 print width compatibility mode settings
SW2-4 SW2-3 Font/Character Dot Spacing Printing Line Count Total No. of Dots
ON OFF 5 x 9/1 dot 33 lines 400 half dots
7 x 9/3 half dots 40 lines
ON 5 x 9/1 half dots 35 lines 385 half dots
5 x 9/2 half dots 42 lines
Rev. B Product Overview Appendix D-69
Confidential
Outline of SpecificationsFeatures
This product was designed as a high-performance POS printer where one unit can handle printing slips, validations, and journals (journals and receipts using pressure-sensitive paper) and to be highly reliable, durable, and long-lasting. The main features are listed below.
• Minimum line logic-seeking controls for high-speed printing.
• When combined with MICR (factory option), MICR reading + check table printing (single-pass high-speed processing) are possible.
• Quiet printing (impact-type industry's top-class quiet printing).
• Sheets can be inserted in two ways: when using validation paper, use the drop-in method by inserting from the top; when using slip paper, insert from the front.
• A mechanical form stopper stabilizes slip sheet insertion.
• Page mode allows printing of any font.
• Many types of check printing are possible.
• Has highly operable roll paper, easy loading of roll paper, and one-touch T/U paper take-up.
• Using the packaged attachment provides the use of two types of paper width.
• Two system drawer drive is available.
• Commands allow you to select character sizes (7 x 9 fonts and 5 x 9 fonts).
• Commands conform to ESC/POS.®
• Printer status is automatically transmitted using the installed ASB (automatic status back) function.
• Supports many I/F specifications (RS-232/bidirectional parallel).
Appendix D-70 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Printer Unit
Printing Specifications
Printing method Serial impact dot matrix
Head wire arrangement 9 x 1 row, wire pitch of 0.353 mm 1/72 inch
Printing direction Bidirectional printing at shortest distance
Print speed Approx. 5.14 lps (for 40 columns, 17.8 cpi, printing on roll paper)
[lps: lines per second][cpi: characters per 25.4 mm (characters per inch) ]
Paper SpecificationsInch values are approximate.
Roll paper
Paper type Plain paper, pressure-sensitive paper
Paper dimensions Paper width 82.5 mm ± 0.5 mm or 76 mm ± 0.5 mm 3.25 ± 0.02” or 2.99 ± 0.02”
External diameter Max. φ60 mm 2.36” for 1 ply paper and journal paper onlyMax. φ89 mm 3.5” for receipt paper only Max. φ83 mm 3.27” for 2-ply paper and 3-ply paper only (However, always take up the last sheet.)
Core Min. 10 mm 0.39” for inner diameter
Single-sheet paper: slip/validation paper
Paper type Regular paper, pressure-sensitive, carbonless copy paper
Paper dimensions Slip 70148 mm (width) × 150210 mm (length) 0.39 - 5.83” (width) × 5.91 - 8.27” (length)
Validation 148150 mm (width) × 70210 mm (length) 5.83 - 5.91” (width) × 0.39 - 8.27” (length)
Table D-24 Paper thickness
Type Paper Thickness
Regular Paper 0.06 mm0.085 mm
Multi-ply paper Per sheet 0.05 mm0.08 mm
Total thickness Max. 0.2 mm
Number of pieces Max. 3 pieces (1 original + 2 copies)
Rev. B Product Overview Appendix D-71
Confidential
1 sheet (no copies)• Paper thickness
Pressure-sensitive paper (with pressure-sensitive paper, use a maximum of 4 sheets including roll paper).
The following table shows the copying capacity. Ambient temperature influences copying capacity, so use this printer within the guaranteed temperatures in the table.
Ribbon Cassette
Use the following dedicated ribbon cassette.
MICR Reader (Factory Option)
Reading Method
Permanent magnet recognition
Recognition Ratio
98% or more (at 25°C 77°F)
• Standard evaluation checks made by EPSON were used for testing purposes.
• Checks should be free of curls, bends, wrinkles, etc.
Table D-25 Thickness of transfer paper
Type Paper Thickness
Base paper 0.07 mm0.12 mm
Copy paper and original paper
0.04 mm0.07 mm
Thermal transfer carbon Paper
Approximately 0.035 mm
Total thickness 0.09 mm0.31 mm (includes paper thickness of roll paper.)
Table D-26 Copying capacity
Copy Page Count Guaranteed Temperatures
Original + 2 Copies 10°C40°C 50°F - 104°F
Original + 1 Copies 5°C45°C 41°F - 113°F
Table D-27 Dedicated ribbon cassette
Type Color Ribbon Life
ERC-32 (P) Purple 6 million characters (25°C 77°F, continuous printing)
ERC-32 (B) Black 4 million characters (25°C 77°F, continuous printing)
Appendix D-72 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Overall Specifications
Internal Buffer
bps: bits per second
Electrical Specifications
Operating voltage +24 VDC ± 10% Current consumption (at 24V, excluding drawer kick drive)
Environmental Specifications
Temperature Operating: 5 45°C 41 - 113°FStorage: -10 50°C 14 - 122°F (excluding paper, ribbon)
Humidity Operating: 10 90% RH (without condensation)Storage: 10 90% RH (without condensation)
(excluding paper, ribbon)
Table D-28 Internal buffer capacity
Buffer Capacity
Receive buffer 45 bytes or 4KB, selected by DIP switch
Communication baud rate 2400, 4800, 9600, 19200 bps
NV bit image storage area 384KB
User NV memory 1KB
Table D-29 Current consumption
Mode Current Consumption
Operation Average: Approx. 1.8 A
Peak: Approx. 5.5 A
Standby Average: Approx. 0.2 A
Rev. B Product Overview Appendix D-73
Confidential
Interface FeaturesRS-232C Serial Interface
Refer to DIP switches for data bit length, baud rate, and parity settings.
Bidirectional Parallel Interface (IEEE-1284)
The interface is Centronics compatible and meets the specifications for IEEE-1284 bidirectional communications.
Table D-30 RS-232C serial interface specifications
Item Specifications
Data transfer method Serial
Synchronization Asynchronous
Handshake DTR/DSR or XON/XOFF control
Signal level MARK: - 3V - 15 V, Logic "1"SPACE: + 3V + 15 V, Logic "0"
Stop bit 1 bit fixed
Printer connector D-SUB25 (female) connector
Table D-31 Bidirectional parallel interface specifications
Item Specifications
Data transfer method 8 bit parallel
Synchronization By externally supplied Strobe signal
Handshake By Ack signal and Busy signal
Signal Level All signals are TTL compatible
Connector ADS-B36BLFDR176 (Honda Tsushin Kogyo) or equivalent (IEEE1284 Type B)
Appendix D-74 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
RS-485 Serial Interface
bps: bits per second
Handshake, bit length, baud rate, and parity are set by the DIP switches.
The data stop bit is fixed at 1 bit.
Table D-32 RS-485 serial interface specifications
Item Specifications
Data transfer method Serial
Synchronization Asynchronous
Handshake DTR/DSR or XON/XOFF control
Signal level 2.5V 5 V: Logic "1" 0.0V 0.8 V: Logic "0"
Baud rate 2400, 4800, 9600, 19200 bps
Parity None, even, odd
Stop bit 1 bit or more
Connector D-SUB25 (female)
Rev. B Product Overview Appendix D-75
Confidential
Appendix D-76 Product Overview Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Appendix EParts ListAlphanumeric List
name for service manual name for price list q’ty page ref.#
76 mm kit 76MM KIT 1 F-1 161
Assist paper guide PAPER GUIDE,ASSIST 1 F-7 664
Assist paper guide spacer SPACER,ASSIST PAPER GUIDE 1 F-1 163
Assist paper guide spring SPRING,ASSIST PAPER GUIDE 1 F-7 653
Back case CASE,BACK,AA 1 F-1 129
Backup paper guide cap CAP,BACK-UP PAPER GUIDE 1 F-7 678
Belt drive cap CAP,BELT DRIVE 2 F-6 603
Belt plate PLATE,BELT 1 F-2,3 684
Belt tension spring SPRING,BELT TENSION 1 F-6 630
Carriage assembly CARRIAGE ASSEMBLY 1 F-6 709
Carriage belt BELT,CARRIAGE 1 F-6 629
Carriage cover frame assembly FRAME,CARRIAGE COVER ASSEMBLY 1 F-2,3 713
Carriage drive pulley PULLEY,CARRIAGE DRIVE 1 F-6 633
Carriage drive transmission gear GEAR,CARRIAGE DRIVE TRANSMISSION 1 F-6 634
Carriage guide shaft SHAFT,CARRIAGE GUIDE 1 F-6 631
Carriage motor MOTOR,CARRIAGE 1 F-6 733
Carriage spring SPRING,CARRIAGE 1 F-6 611
Carriage transmission pulley PULLEY,CARRIAGE TRANSMISSION 1 F-6 632
Caution seal SEAL,CAUTION 1 F-1 122
Circuit board FFC FFC,CIRCUIT BOARD 2 F-1 206
Clamp CLAMP 1 F-1 110
Connector plate (type BA) PLATE,CONNECTOR,BA 1 F-1 123
Control panel cable CABLE,SWITCH PANEL 1 F-1 207
Control panel circuit board assembly SWITCH PANEL CIRCUIT BOARD ASSEMBLY 1 F-1 204
Control panel label LABEL,SWITCH PANEL,AA 1 F-1 157
Control panel unit SWITCH PANEL UNIT,AA 1 F-1 134
Cover ground plate PLATE,COVER GROUND 1 F-7 676
Crank shaft holder CRANK SHAFT HOLDER 6 F-4,5,7 730
C-ring (5103-21) C-RING,5103-21 2 F-7 772
Drive lever coil cover COVER,DRIVE LEVER COIL 1 F-4,5 671
Endorsement platen shutter SHUTTER,ENDORSEMENT PLATEN 1 F-4,5 680
Rev. B Parts List Appendix E-1
Confidential
E-ring (1.2) RETAINING RING TYPE-E(1.2) F/UC - F-8 778
E-ring (1.5) RETAINING RING TYPE-E(1.5) - F-4,5,7 719
E-ring (2) RETAINING RING TYPE-E(2) F/UC - F-1 105
E-ring (2) RETAINING RING TYPE-E(2) F/UC - F-6,7 720
E-ring (2.3) RETAINING RING TYPE-E (2.3) F/UC - F-2,3,4,5,7 724
E-ring (3) RETAINING RING TYPE-E(3)F/UC - F-2,3,4,5,7 721
E-ring (4) RETAINING RING TYPE-E(4) F/UC - F-7 722
E-ring (5) RETAINING RING TYPE-E(5) F/UC - F-4,5,6 723
Form stopper FORM STOPPER 1 F-4,5 618
Form stopper shaft SHAFT,FORM STOPPER 1 F-4,5 619
Form stopper spring SPRING,FORM STOPPER 1 F-4,5 620
Front case CASE,FRONT,AA 1 F-1 130
Front cover detector assembly FRONT COVER DETECTOR ASSEMBLY 1 F-2,3 691
Front frame FRAME,FRONT 1 F-4,5 613
Front reinforcement frame FRAME,FRONT REINFORCE 1 F-4,5 612
Front seal SEAL,FRONT,AA 1 F-1 148
Front sound absorption material SOUND ABSORPTION MATERIAL,FRONT 2 F-1 144
Gear train cover COVER,GEAR TRAIN 1 F-6 768
Guide roller shaft SHAFT,GUIDE ROLLER 1 F-7 641
H.P. detector assembly H.P.DETECTOR ASSEMBLY 1 F-6 707
Head caution seal SEAL,CAUTION,HEAD B 1 F-1 162
Head seal SEAL,HEAD 1 F-6 795
Hexagon lock screw (millimeter type) HEXAGON LOCK SCREW 2 F-1 155
Hexagon nut H.N.-1,3,F/ZN 1 F-1 120
Holder plate (type A) PLATE,HOLDER,A 1 F-1 141
Holder plate (type B) PLATE,HOLDER,B 1 F-1 160
Holder spring SPRING,HOLDER,A 1 F-1 142
IC cover IC COVER 1 F-1 111
Intermediate cable (type A) CABLE,INTERMEDIATE,A 1 F-6 734
Intermediate cable (type B) CABLE,INTERMEDIATE,B 1 F-6 735
Intermediate cable (type C) CABLE,INTERMEDIATE,C 1 F-6 736
Intermediate cable tube TUBE,CABLE INTERMEDIATE 1 F-6 771
Intermediate circuit board assembly INTERMEDIATE CIRCUIT BOARD ASSEMBLY 1 F-6 708
Intermediate circuit board cover COVER,INTERMEDIATE CIRCUIT BOARD 1 F-6 769
J/S change gear J/S CHANGE GEAR 1 F-2,3 728
J/S change lever LEVER,J/S CHANGE 1 F-2,3 650
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Appendix E-2 Parts List Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
J/S change solenoid J/S CHANG SOLENOID 1 F-2,3 727
J/S change spring SPRING,J/S CHANGE 1 F-2,3 651
J/S solenoid mounting plate MOUNTING PLATE,J/S SOLENOID 1 F-2,3 774
Lead wire (type A) LEAD WIRE,A 1 F-4,5 740
Lead wire (type B) LEAD WIRE,B 1 F-4,5 741
Lead wire (type C) LEAD WIRE,C 1 F-4,5 742
Lead wire (type D) LEAD WIRE,D 1 F-4,5 743
Lead wire (type E) LEAD WIRE,E 1 F-4,5 744
Lead wire (type F) LEAD WIRE,F 1 F-4,5 745
Lead wire (type G) LEAD WIRE,G 1 F-4,5 746
Lead wire (type H) LEAD WIRE,H 1 F-4,5 747
Lead wire (type I) LEAD WIRE,I 1 F-4,5 748
Lead wire (type J) LEAD WIRE,J 1 F-4,5 749
Lead wire (type K) LEAD WIRE,K 1 F-4,5 750
Lead wire (type L) LEAD WIRE,L 1 F-6 751
Lead wire (type M) LEAD WIRE,M 1 F-6 752
Lead wire (type N) LEAD WIRE,N 1 F-6 753
Lead wire (type O) LEAD WIRE,O 1 F-7 754
Lead wire (type P) LEAD WIRE,P 1 F-7 755
Lead wire (type Q) LEAD WIRE,Q 1 F-7 756
Lead wire (type R) LEAD WIRE,R 1 F-4,5 757
Lead wire (type S) LEAD WIRE,S 1 F-4,5 758
Lead wire (type T) LEAD WIRE,T 1 F-4,5 759
Lead wire (type U) LEAD WIRE,U 1 F-2,3 760
Lead wire (type V) LEAD WIRE,V 1 F-2,3 761
Lead wire (type W) LEAD WIRE,W 1 F-2,3 762
Lead wire (type X) LEAD WIRE,X 1 F-2,3 763
Lead wire (type Y) LEAD WIRE,Y 1 F-2,3 764
Lead wire (type Z) LEAD WIRE,Z 1 F-2,3 765
Left platen lever shaft SHAFT,PLATEN LEVER,L 1 F-7 626
Lever coil mounting plate sub assembly MOUNTING PLATE,LEVER COIL SUB ASSEMBLY
1 F-4,5 695
Lever drive coil (type A) COIL,LEVER DRIVE,A 1 F-4,5 621
Lever drive coil (type B) COIL,LEVER DRIVE,B 1 F-4,5 622
Lever drive motor assembly MOTOR,LEVER DRIVE ASSEMBLY 1 F-4,5 686
Lever drive motor detector plate DETECTOR PLATE,LEVER DRIVE MOTOR 1 F-4,5 614
Lever drive shaft assembly LEVER DRIVE SHAFT ASSEMBLY 1 F-4,5 693
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Rev. B Parts List Appendix E-3
Confidential
Lever drive shaft gear GEAR,LEVER DRIVE SHAFT 1 F-4,5 617
Lever drive transmission gear GEAR,LEVER DRIVE TRANSMISSION 1 F-2,3 616
Lever motor reduction gear GEAR,LEVER MOTOR REDUCTION 1 F-4,5 615
Lever motor T.P. detector assembly LEVER MOTER T.P. DETECTOR ASSEMBLY 1 F-4,5 704
Lower case CASE,LOWER,AA 1 F-1 127
Lower plate PLATE,LOWER,A 1 F-1 136
Main circuit board (type AB) assembly MAIN CIRCUIT BOARD,AB ASSEMBLY 1 F-4,5 705
Main circuit board unit (with MICR) MAIN CIRCUIT BOARD UNIT 1 F-1 201
Main circuit board unit (without MICR) MAIN CIRCUIT BOARD UNIT 1 F-1 201
Main plate sub assembly PLATE,MAIN,SUBU ASSEMBLY,A 1 F-1 133
Mechanism assembly (with MICR) MECHANISM ASSEMBLY 1 F-1 600
Mechanism assembly (without MICR) MECHANISM ASSEMBLY 1 F-1 600
Metallic insulator spacer INSULATOR SPACER 2 F-1 114
MICR assembly ASSEMBLY,MICR 1 F-8 782
MICR case CASE,MICR 1 F-8 783
MICR connector assembly CONNECTOR ASSEMBLY,MICR 1 F-8 786
MICR fixing MICR FIXING 1 F-8 788
MICR fixing sheet SHEET,MICR FIXING 1 F-8 791
MICR frame assembly FRAME,MICR ASSEMBLY 1 F-8 792
MICR lever LEVER,MICR 1 F-8 787
MICR lever fixing plate FIXING PLATE,MICR LEVER 1 F-8 784
MICR lever guide shaft SHAFT,MICR LEVER GUIDE 2 F-8 796
MICR lever spring SPRING,MICR LEVER 1 F-8 790
MICR roller shaft SHAFT,MICR ROLLER 2 F-8 777
MICR shield cover (type A) COVER,MICR SHIELD,A 1 F-8 785
MICR shutter SHUTTER,MICR 1 F-4 679
MICR solenoid SOLENOID,MICR 1 F-8 789
Micro switch MICROSWITCH 1 F-1 119
Motor shield case CASE,MOTOR SHIELD 1 F-3 780
Motor shield cover COVER,MOTOR SHIELD 1 F-3 781
Motor shield spacer SPACER,MOTOR SHIELD 1 F-3 779
N.E. detector adjustment screw SCREW,DETECTOR ADJUSTMENT,N.E 1 F-1 125
N.E. detector assembly lead wire LEAD WIRE N.E.DETECTOR ASSEMBLY 1 F-1 205
N.E. detector holder HOLDER,N.E.DETECTOR 1 F-1 116
N.E. detector lever LEVER,N.E.DETECTOR 1 F-1 117
N.E. detector spacer SPACER,N.E.DETECTOR 1 F-1 121
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Appendix E-4 Parts List Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Nose guide GUIDE,NOSE 1 F-6 623
Nylon clamp NYLON CLAMP 1 F-1 150
Nylon clip NYLON CLIP 1 F-2,3 607
Nylon lock nut NYLON LOCK NUT M3 2 F-7 718
Oil ring OIL RING 2 F-6 605
Operation label (type AA) LABEL,OPERATION,AA 1 F-1 139
Operation label (type BA) LABEL,OPERATION,BA 1 F-1 140
Operation label (type DA) LABEL,OPERATION,DA 1 F-1 149
Operation label (type EA) LABEL,OPERATION,EA 1 F-1 158
Paper ejection detector assembly PAPER EJECTION DETECTOR ASSEMBLY 1 F-2,3 690
Paper ejection detector cable (type A) assembly
CABLE ASSEMBLY,PAPER EJECTION DETECTOR,A
1 F-4,5 737
Paper ejection detector cable (type B) assembly
CABLE ASSEMBLY,PAPER EJECTION DETECTOR,B
1 F-2,3 738
Paper ejection detector holder HOLDER,PAPER EJECTION DETECTOR 1 F-2,3 635
Paper end detector assembly PAPER END DETECTOR ASSEMBLY 1 F-7 710
Paper feed frame assembly PAPER FEED FRAME ASSEMBLY 1 F-7 698
Paper feed frame cover COVER,PAPER FEED FRAME 1 F-7 669
Paper feed frame fixing L lever (type A) assembly
LEVER,PAPER FEED FRAME FIXING L,A ASSEMBLY
1 F-7 701
Paper feed frame fixing lever spring (type A)
SPRING,PAPER FEED FRAME FIXING LEVER,A
2 F-7 655
Paper feed frame fixing R lever (type A) assembly
LEVER,PAPER FEED FRAME FIXING R,A ASSEMBLY
1 F-7 702
Paper feed frame shaft SHAFT,PAPER FEED FRAME 1 F-2,3 643
Paper feed frame stopper STOPPER,PAPER FEED FRAME 1 F-2,3 677
Paper feed gear GEAR,PAPER FEED 4 F-7 648
Paper feed motor MOTOR,PAPER FEED 1 F-2,3 739
Paper feed reduction gear PAPER FEED REDUCTION GEAR 2 F-2,3 729
Paper feed roller ROLLER,PAPER FEED 1 F-7 666
Paper feed roller spring SPRING,PAPER FEED ROLLER 2 F-7 654
Paper feed transmission gear GEAR,PAPER FEED TRANSMISSION 1 F-4,5 637
Paper feed trigger attraction plate PAPER FEED TRIGGER ATTRACTIVE PLATE 2 F-4,5 732
Paper feed trigger claw spring PAPER FEED TRIGGER CROW SPRING 3 2 F-4,5 731
Paper guide lever LEVER,PAPER GUIDE 1 F-7 658
Paper guide lever shaft SHAFT,PAPER GUIDE LEVER 1 F-7 639
Paper guide lever spring SPRING,PAPER GUIDE LEVER 2 F-7 652
Paper hold roller ROLLER,PAPER HOLD 1 F-7 665
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Rev. B Parts List Appendix E-5
Confidential
Paper hold roller shaft SHAFT,PAPER HOLD ROLLER 1 F-7 642
Paper release lever LEVER,PAPER RELEASE 1 F-7 657
Paper take-up belt PAPER TAKE UP BELT 1 F-1 153
Parallel I/F circuit board unit (without connector plate)
PARALLEL I/F CIRCUIT BOARD 1 F-1 202
Parallel pin (1.6X10) PP-A,1.6X10,S/NA 3 F-7 602
Plain washer (4.2X1X12) PLAIN WASHER,4.2X1X12,F/ZN 2 F-1 112
Platen adjustment screw SCREW,PLATEN ADJUSTMENT 2 F-7 685
Platen assembly PLATEN ASSEMBLY 1 F-7 711
Platen ground plate (type A) PLATE,PLATEN GROUND,A 1 F-7 674
Platen ground plate (type B) PLATE,PLATEN GROUND,B 1 F-7 675
Platen lever assembly LEVER,PLATEN ASSEMBLY 1 F-7 624
Platen lever drive cam CAM,PLATEN LEVER DRIVE 1 F-2,3 628
Platen lever spring SPRING,PLATEN LEVER 1 F-7 625
Platen spring SPRING,PLATEN 2 F-7 604
Power switch cable assembly POWER SWITCH CABLE SET,AA 1 F-1 203
Power switch cover COVER,POWER SWITCH,BA 1 F-1 156
Print head unit (Eb) PRINT HEAD UNIT EB 1 F-6 689
R cover detector cap CAP,R COVER DETECTOR 1 F-2,3 636
Rear cover detector assembly REAR COVER DETECTOR ASSEMBLY 1 F-2,3 692
Rear sound absorption material SOUND ABSORPTION MATERIAL,REAR 1 F-1 145
Release lever shaft SHAFT,RELEASE LEVER 1 F-7 638
Ribbon cassette cover COVER,RIBBON CASSETTE,AA 1 F-1 131
Ribbon drive plate assembly RIBBON DRIVE PLATE ASSEMBLY 1 F-6 706
Ribbon feed spring RIBBON FEED SPRING 1 F-6 601
Ribbon intermediate gear GEAR,RIBBON INTERMEDIATE 1 F-6 683
Ribbon reduction gear GEAR,RIBBON REDUCTION 1 F-6 682
Ribbon take-up gear assembly GEAR,RIBBON TAKE-UP ASSEMBLY 1 F-6 712
Right platen lever shaft SHAFT,PLATEN LEVER,R 1 F-7 627
Roll paper cover COVER,ROLL PAPER,BA 1 F-1 132
Roll paper guide GUIDE,ROLL PAPER 1 F-1 159
Roll paper holder HOLDER,ROLL PAPER,A 1 F-1 143
Roll paper path spacer SPACER,ROLL PAPER PASS 1 F-1 164
Roll paper receive roller ROLL PAPER RECEIVE ROLLER 3 F-1 154
RS-232 I/F circuit board unit (with connector plate)
RS-232 I/F CIRCUIT BOARD 1 F-1 202
Rubber foot RUBBER FOOT 3 F-1 124
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Appendix E-6 Parts List Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Rubber insulator spacer SPACER,INSULATOR 2 F-1 113
Screw (C.B., 2.6X4) C.B.,2.6X4,F/ZN - F-4,5 773
Screw (C.B.B-tite, 2X8) C.B.B-TITE,2X8,F/ZN - F-1 118
Screw (C.B.B-tite, 4X12) C.B.B.SCREW,4X12,F/ZN - F-1 108
Screw (C.B.B-tite, 4X25) C.B.B.SCREW,4X25 F/ZN - F-1 109
Screw (C.B.P-tite, 3X6) C.B.P-TITE SCREW,3X6,F/ZN - F-2,3,4,5,7 609
Screw (C.B.P-tite, 3x8) C.B.P-TITE,3x8,F/ZN - F-1 101
Screw (C.B.P-tite, 3X8) C.B.P-TITE SCREW,3X8,F/ZN - F-4,5 776
Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN - F-1 102
Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN - F-2,3 714
Screw (C.B.S-tite F, 3X6) C.B.S-TITEF,3X6,F/ZN - F-1 106
Screw (C.B.S-tite F, 3X6) C.B.S-TITEF,3X6,F/ZN - F-2,3,4,5,6 726
Screw (C.C., 2X3) C.C.2X3,F/ZN - F-2,3 716
Screw (C.C., 3X5) C.C.SCREW,3X5,F/ZN - F-2,3 717
Screw (C.C., 4X20) C.C.SCREW,4X20,F/ZN - F-1 104
Screw (C.C.S-tite, 2.5X5) C.C.S-TITE SCREW,2.5*5,F/ZN - F-2,3,4,5 725
Screw (C.P.(S), 2.6X8) C.P.(S)SCREW,2.6X8.F/ZN - F-8 794
Screw (C.P.(S-P2), 2.5X5) C.P.(S-P2),2.5X5,F/Zn - F-8 793
Screw (C.P.P-tite, 3X12) C.P.P-TITE SCREW,3X12,F/ZN - F-6 608
Screw (C.P.S-tite F, 3X5) C.P.S-TITE F,3X5,F/ZN - F-2,3 715
Screw (C.P.S-tite(0), 3X6) C.P.S-TITE.(0),3X6,F/ZN - F-1 107
Screw (C.P.S-tite(P4), 3x6) C.P.S-TITE(P4),3X6,F/ZN - F-6 775
Screw (C.P.S-tite, 3X6) C.P.S-TITE SCREW,3X6,F/ZN - F-1 155
Screw (C.P.T-B, 3X10) C.P.T-B SCREW,3X10,F/ZN - F-1 103
Slip B.O.F. detector assembly SLIP B.O.F. DETECTOR ASSEMBLY 1 F-4,5 696
Slip drive gear GEAR,SLIP DRIVE 4 F-2,3,4,5,7 649
Slip feed roller ROLLER,SLIP FEED 1 F-7 668
Slip feed roller holder HOLDER,SLIP FEED ROLLER 1 F-7 659
Slip feed roller shaft holder SHAFT HOLDER,SLIP FEED ROLLER 4 F-2,3,4,5 610
Slip guide lower frame (type B) FRAME,SLIP GUID LOWER,B 1 F-4 662
Slip guide lower frame assembly (type B) FRAME,SLIP GUID LOWER,B ASSEMBLY 1 F-5 662
Slip guide upper frame FRAME,SLIP GUID UPPER 1 F-4,5 661
Slip hold roller shaft SHAFT,SLIP HOLD ROLLER 1 F-2,3 645
Slip hold roller sleeve SLEEVE,SLIP HOLD ROLLER 1 F-2,3 766
Slip hold roller spring SPRING,SLIP HOLD ROLLER 1 F-2,3 767
Slip insertion detector holder HOLDER,SLIP INSERT DETECTOR 1 F-4,5 606
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Rev. B Parts List Appendix E-7
Confidential
Slip paper guide PAPER GUIDE,SLIP 1 F-7 670
Slip T.O.F. detector assembly SLIP T.O.F. DETECTOR ASSEMBLY 1 F-4,5 703
Slip transmission gear GEAR,SLIP TRANSMISSION 3 F-2,3 647
Strengthening plate PLATE,STRENGTHEN,B 1 F-1 135
Sub paper feed roller assembly ROLLER,SUB PAPER FEED ASSEMBLY 1 F-7 699
Sub paper hold roller ROLLER,SUB PAPER HOLD 3 F-7 663
Sub paper hold roller shaft SHAFT,SUB PAPER HOLD ROLLER 1 F-7 640
Sub slip feed lever shaft SHAFT,SUB SLIP FEED LEVER 1 F-4,5 644
Sub slip feed lever spring SPRING,SUB SLIP FEED LEVER 1 F-4,5 656
Sub slip feed lever sub assembly LEVER,SUB SLIP FEED SUB ASSEMBLY 1 F-4,5 687
Sub slip feed roller assembly ROLLER,SUB SLIP FEED ASSEMBLY 1 F-4,5 694
Sub slip feed roller holder HOLDER,SUB SLIP FEED ROLLER 1 F-4,5 660
Sub slip hold roller ROLLER,SUB SLIP HOLD 1 F-4,5 667
Sub slip hold sleeve SLEEVE,SUB SLIP HOLD 2 F-4,5 770
Support plate PLATE,SUPPORT,A 1 F-1 137
Table holder HOLDER,TABLE,A 1 F-1 138
Take-up assembly TAKE-UP ASSEMBLY 1 F-1 126
Take-up drive gear GEAR,TAKE-UP DRIVE 1 F-2,3 646
Take-up frame assembly FRAME,TAKE-UP ASSEMBLY 1 F-1 147
Take-up gear GEAR,TAKE-UP 1 F-1 146
Take-up pulley TAKE UP PULLEY 1 F-1 152
Take-up spring TAKE UP SPRING 1 F-1 151
Upper case CASE,UPPER,AA 1 F-1 128
Validation detector assembly VALIDATION DETECTOR ASSEMBLY 1 F-4,5 697
Validation stopper STOPPER,VALIDATION 1 F-4,5 672
Validation stopper spring SPRING,VALIDATION STOPPER 1 F-4,5 673
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Appendix E-8 Parts List Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Reference Number Listname for service manual name for price list q’ty page ref.#
Screw (C.B.P-tite, 3x8) C.B.P-TITE,3x8,F/ZN - F-1 101
Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN - F-1 102
Screw (C.P.T-B, 3X10) C.P.T-B SCREW,3X10,F/ZN - F-1 103
Screw (C.C., 4X20) C.C.SCREW,4X20,F/ZN - F-1 104
E-ring (2) RETAINING RING TYPE-E(2) F/UC - F-1 105
Screw (C.B.S-tite F, 3X6) C.B.S-TITEF,3X6,F/ZN - F-1 106
Screw (C.P.S-tite(0), 3X6) C.P.S-TITE.(0),3X6,F/ZN - F-1 107
Screw (C.B.B-tite, 4X12) C.B.B.SCREW,4X12,F/ZN - F-1 108
Screw (C.B.B-tite, 4X25) C.B.B.SCREW,4X25 F/ZN - F-1 109
Clamp CLAMP 1 F-1 110
IC cover IC COVER 1 F-1 111
Plain washer (4.2X1X12) PLAIN WASHER,4.2X1X12,F/ZN 2 F-1 112
Rubber insulator spacer SPACER,INSULATOR 2 F-1 113
Metallic insulator spacer INSULATOR SPACER 2 F-1 114
N.E. detector holder HOLDER,N.E.DETECTOR 1 F-1 116
N.E. detector lever LEVER,N.E.DETECTOR 1 F-1 117
Screw (C.B.B-tite, 2X8) C.B.B-TITE,2X8,F/ZN - F-1 118
Micro switch MICROSWITCH 1 F-1 119
Hexagon nut H.N.-1,3,F/ZN 1 F-1 120
N.E. detector spacer SPACER,N.E.DETECTOR 1 F-1 121
Caution seal SEAL,CAUTION 1 F-1 122
Connector plate (type BA) PLATE,CONNECTOR,BA 1 F-1 123
Rubber foot RUBBER FOOT 3 F-1 124
N.E. detector adjustment screw SCREW,DETECTOR ADJUSTMENT,N.E 1 F-1 125
Take-up assembly TAKE-UP ASSEMBLY 1 F-1 126
Lower case CASE,LOWER,AA 1 F-1 127
Upper case CASE,UPPER,AA 1 F-1 128
Back case CASE,BACK,AA 1 F-1 129
Front case CASE,FRONT,AA 1 F-1 130
Ribbon cassette cover COVER,RIBBON CASSETTE,AA 1 F-1 131
Roll paper cover COVER,ROLL PAPER,BA 1 F-1 132
Main plate sub assembly PLATE,MAIN,SUBU ASSEMBLY,A 1 F-1 133
Control panel unit SWITCH PANEL UNIT,AA 1 F-1 134
Strengthening plate PLATE,STRENGTHEN,B 1 F-1 135
Lower plate PLATE,LOWER,A 1 F-1 136
Rev. B Parts List Appendix E-9
Confidential
Support plate PLATE,SUPPORT,A 1 F-1 137
Table holder HOLDER,TABLE,A 1 F-1 138
Operation label (type AA) LABEL,OPERATION,AA 1 F-1 139
Operation label (type BA) LABEL,OPERATION,BA 1 F-1 140
Holder plate (type A) PLATE,HOLDER,A 1 F-1 141
Holder spring SPRING,HOLDER,A 1 F-1 142
Roll paper holder HOLDER,ROLL PAPER,A 1 F-1 143
Front sound absorption material SOUND ABSORPTION MATERIAL,FRONT 2 F-1 144
Rear sound absorption material SOUND ABSORPTION MATERIAL,REAR 1 F-1 145
Take-up gear GEAR,TAKE-UP 1 F-1 146
Take-up frame assembly FRAME,TAKE-UP ASSEMBLY 1 F-1 147
Front seal SEAL,FRONT,AA 1 F-1 148
Operation label (type DA) LABEL,OPERATION,DA 1 F-1 149
Nylon clamp NYLON CLAMP 1 F-1 150
Take-up spring TAKE UP SPRING 1 F-1 151
Take-up pulley TAKE UP PULLEY 1 F-1 152
Paper take-up belt PAPER TAKE UP BELT 1 F-1 153
Roll paper receive roller ROLL PAPER RECEIVE ROLLER 3 F-1 154
Hexagon lock screw (millimeter type) HEXAGON LOCK SCREW 2 F-1 155
Screw (C.P.S-tite, 3X6) C.P.S-TITE SCREW,3X6,F/ZN - F-1 155
Power switch cover COVER,POWER SWITCH,BA 1 F-1 156
Control panel label LABEL,SWITCH PANEL,AA 1 F-1 157
Operation label (type EA) LABEL,OPERATION,EA 1 F-1 158
Roll paper guide GUIDE,ROLL PAPER 1 F-1 159
Holder plate (type B) PLATE,HOLDER,B 1 F-1 160
76 mm kit 76MM KIT 1 F-1 161
Head caution seal SEAL,CAUTION,HEAD B 1 F-1 162
Assist paper guide spacer SPACER,ASSIST PAPER GUIDE 1 F-1 163
Roll paper path spacer SPACER,ROLL PAPER PASS 1 F-1 164
Main circuit board unit (with MICR) MAIN CIRCUIT BOARD UNIT 1 F-1 201
Main circuit board unit (without MICR) MAIN CIRCUIT BOARD UNIT 1 F-1 201
Parallel I/F circuit board unit (without connector plate)
PARALLEL I/F CIRCUIT BOARD 1 F-1 202
RS-232 I/F circuit board unit (with connector plate)
RS-232 I/F CIRCUIT BOARD 1 F-1 202
Power switch cable assembly POWER SWITCH CABLE SET,AA 1 F-1 203
Control panel circuit board assembly SWITCH PANEL CIRCUIT BOARD ASSEMBLY 1 F-1 204
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Appendix E-10 Parts List Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
N.E. detector assembly lead wire LEAD WIRE N.E.DETECTOR ASSEMBLY 1 F-1 205
Circuit board FFC FFC,CIRCUIT BOARD 2 F-1 206
Control panel cable CABLE,SWITCH PANEL 1 F-1 207
Mechanism assembly (with MICR) MECHANISM ASSEMBLY 1 F-1 600
Mechanism assembly (without MICR) MECHANISM ASSEMBLY 1 F-1 600
Ribbon feed spring RIBBON FEED SPRING 1 F-6 601
Parallel pin (1.6X10) PP-A,1.6X10,S/NA 3 F-7 602
Belt drive cap CAP,BELT DRIVE 2 F-6 603
Platen spring SPRING,PLATEN 2 F-7 604
Oil ring OIL RING 2 F-6 605
Slip insertion detector holder HOLDER,SLIP INSERT DETECTOR 1 F-4,5 606
Nylon clip NYLON CLIP 1 F-2,3 607
Screw (C.P.P-tite, 3X12) C.P.P-TITE SCREW,3X12,F/ZN - F-6 608
Screw (C.B.P-tite, 3X6) C.B.P-TITE SCREW,3X6,F/ZN - F-2,3,4,5,7 609
Slip feed roller shaft holder SHAFT HOLDER,SLIP FEED ROLLER 4 F-2,3,4,5 610
Carriage spring SPRING,CARRIAGE 1 F-6 611
Front reinforcement frame FRAME,FRONT REINFORCE 1 F-4,5 612
Front frame FRAME,FRONT 1 F-4,5 613
Lever drive motor detector plate DETECTOR PLATE,LEVER DRIVE MOTOR 1 F-4,5 614
Lever motor reduction gear GEAR,LEVER MOTOR REDUCTION 1 F-4,5 615
Lever drive transmission gear GEAR,LEVER DRIVE TRANSMISSION 1 F-2,3 616
Lever drive shaft gear GEAR,LEVER DRIVE SHAFT 1 F-4,5 617
Form stopper FORM STOPPER 1 F-4,5 618
Form stopper shaft SHAFT,FORM STOPPER 1 F-4,5 619
Form stopper spring SPRING,FORM STOPPER 1 F-4,5 620
Lever drive coil (type A) COIL,LEVER DRIVE,A 1 F-4,5 621
Lever drive coil (type B) COIL,LEVER DRIVE,B 1 F-4,5 622
Nose guide GUIDE,NOSE 1 F-6 623
Platen lever assembly LEVER,PLATEN ASSEMBLY 1 F-7 624
Platen lever spring SPRING,PLATEN LEVER 1 F-7 625
Left platen lever shaft SHAFT,PLATEN LEVER,L 1 F-7 626
Right platen lever shaft SHAFT,PLATEN LEVER,R 1 F-7 627
Platen lever drive cam CAM,PLATEN LEVER DRIVE 1 F-2,3 628
Carriage belt BELT,CARRIAGE 1 F-6 629
Belt tension spring SPRING,BELT TENSION 1 F-6 630
Carriage guide shaft SHAFT,CARRIAGE GUIDE 1 F-6 631
name for service manual name for price list q’ty page ref.#
Rev. B Parts List Appendix E-11
Confidential
Carriage transmission pulley PULLEY,CARRIAGE TRANSMISSION 1 F-6 632
Carriage drive pulley PULLEY,CARRIAGE DRIVE 1 F-6 633
Carriage drive transmission gear GEAR,CARRIAGE DRIVE TRANSMISSION 1 F-6 634
Paper ejection detector holder HOLDER,PAPER EJECTION DETECTOR 1 F-2,3 635
R cover detector cap CAP,R COVER DETECTOR 1 F-2,3 636
Paper feed transmission gear GEAR,PAPER FEED TRANSMISSION 1 F-4,5 637
Release lever shaft SHAFT,RELEASE LEVER 1 F-7 638
Paper guide lever shaft SHAFT,PAPER GUIDE LEVER 1 F-7 639
Sub paper hold roller shaft SHAFT,SUB PAPER HOLD ROLLER 1 F-7 640
Guide roller shaft SHAFT,GUIDE ROLLER 1 F-7 641
Paper hold roller shaft SHAFT,PAPER HOLD ROLLER 1 F-7 642
Paper feed frame shaft SHAFT,PAPER FEED FRAME 1 F-2,3 643
Sub slip feed lever shaft SHAFT,SUB SLIP FEED LEVER 1 F-4,5 644
Slip hold roller shaft SHAFT,SLIP HOLD ROLLER 1 F-2,3 645
Take-up drive gear GEAR,TAKE-UP DRIVE 1 F-2,3 646
Slip transmission gear GEAR,SLIP TRANSMISSION 3 F-2,3 647
Paper feed gear GEAR,PAPER FEED 4 F-7 648
Slip drive gear GEAR,SLIP DRIVE 4 F-2,3,4,5,7 649
J/S change lever LEVER,J/S CHANGE 1 F-2,3 650
J/S change spring SPRING,J/S CHANGE 1 F-2,3 651
Paper guide lever spring SPRING,PAPER GUIDE LEVER 2 F-7 652
Assist paper guide spring SPRING,ASSIST PAPER GUIDE 1 F-7 653
Paper feed roller spring SPRING,PAPER FEED ROLLER 2 F-7 654
Paper feed frame fixing lever spring (type A)
SPRING,PAPER FEED FRAME FIXING LEVER,A
2 F-7 655
Sub slip feed lever spring SPRING,SUB SLIP FEED LEVER 1 F-4,5 656
Paper release lever LEVER,PAPER RELEASE 1 F-7 657
Paper guide lever LEVER,PAPER GUIDE 1 F-7 658
Slip feed roller holder HOLDER,SLIP FEED ROLLER 1 F-7 659
Sub slip feed roller holder HOLDER,SUB SLIP FEED ROLLER 1 F-4,5 660
Slip guide upper frame FRAME,SLIP GUID UPPER 1 F-4,5 661
Slip guide lower frame (type B) FRAME,SLIP GUID LOWER,B 1 F-4 662
Slip guide lower frame assembly (type B) FRAME,SLIP GUID LOWER,B ASSEMBLY 1 F-5 662
Sub paper hold roller ROLLER,SUB PAPER HOLD 3 F-7 663
Assist paper guide PAPER GUIDE,ASSIST 1 F-7 664
Paper hold roller ROLLER,PAPER HOLD 1 F-7 665
Paper feed roller ROLLER,PAPER FEED 1 F-7 666
name for service manual name for price list q’ty page ref.#
Appendix E-12 Parts List Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Sub slip hold roller ROLLER,SUB SLIP HOLD 1 F-4,5 667
Slip feed roller ROLLER,SLIP FEED 1 F-7 668
Paper feed frame cover COVER,PAPER FEED FRAME 1 F-7 669
Slip paper guide PAPER GUIDE,SLIP 1 F-7 670
Drive lever coil cover COVER,DRIVE LEVER COIL 1 F-4,5 671
Validation stopper STOPPER,VALIDATION 1 F-4,5 672
Validation stopper spring SPRING,VALIDATION STOPPER 1 F-4,5 673
Platen ground plate (type A) PLATE,PLATEN GROUND,A 1 F-7 674
Platen ground plate (type B) PLATE,PLATEN GROUND,B 1 F-7 675
Cover ground plate PLATE,COVER GROUND 1 F-7 676
Paper feed frame stopper STOPPER,PAPER FEED FRAME 1 F-2,3 677
Backup paper guide cap CAP,BACK-UP PAPER GUIDE 1 F-7 678
MICR shutter SHUTTER,MICR 1 F-4 679
Endorsement platen shutter SHUTTER,ENDORSEMENT PLATEN 1 F-4,5 680
Ribbon reduction gear GEAR,RIBBON REDUCTION 1 F-6 682
Ribbon intermediate gear GEAR,RIBBON INTERMEDIATE 1 F-6 683
Belt plate PLATE,BELT 1 F-2,3 684
Platen adjustment screw SCREW,PLATEN ADJUSTMENT 2 F-7 685
Lever drive motor assembly MOTOR,LEVER DRIVE ASSEMBLY 1 F-4,5 686
Sub slip feed lever sub assembly LEVER,SUB SLIP FEED SUB ASSEMBLY 1 F-4,5 687
Print head unit (Eb) PRINT HEAD UNIT EB 1 F-6 689
Paper ejection detector assembly PAPER EJECTION DETECTOR ASSEMBLY 1 F-2,3 690
Front cover detector assembly FRONT COVER DETECTOR ASSEMBLY 1 F-2,3 691
Rear cover detector assembly REAR COVER DETECTOR ASSEMBLY 1 F-2,3 692
Lever drive shaft assembly LEVER DRIVE SHAFT ASSEMBLY 1 F-4,5 693
Sub slip feed roller assembly ROLLER,SUB SLIP FEED ASSEMBLY 1 F-4,5 694
Lever coil mounting plate sub assembly MOUNTING PLATE,LEVER COIL SUB ASSEMBLY
1 F-4,5 695
Slip B.O.F. detector assembly SLIP B.O.F. DETECTOR ASSEMBLY 1 F-4,5 696
Validation detector assembly VALIDATION DETECTOR ASSEMBLY 1 F-4,5 697
Paper feed frame assembly PAPER FEED FRAME ASSEMBLY 1 F-7 698
Sub paper feed roller assembly ROLLER,SUB PAPER FEED ASSEMBLY 1 F-7 699
Paper feed frame fixing L lever (type A) assembly
LEVER,PAPER FEED FRAME FIXING L,A ASSEMBLY
1 F-7 701
Paper feed frame fixing R lever (type A) assembly
LEVER,PAPER FEED FRAME FIXING R,A ASSEMBLY
1 F-7 702
Slip T.O.F. detector assembly SLIP T.O.F. DETECTOR ASSEMBLY 1 F-4,5 703
Lever motor T.P. detector assembly LEVER MOTER T.P. DETECTOR ASSEMBLY 1 F-4,5 704
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Rev. B Parts List Appendix E-13
Confidential
Main circuit board (type AB) assembly MAIN CIRCUIT BOARD,AB ASSEMBLY 1 F-4,5 705
Ribbon drive plate assembly RIBBON DRIVE PLATE ASSEMBLY 1 F-6 706
H.P. detector assembly H.P.DETECTOR ASSEMBLY 1 F-6 707
Intermediate circuit board assembly INTERMEDIATE CIRCUIT BOARD ASSEMBLY 1 F-6 708
Carriage assembly CARRIAGE ASSEMBLY 1 F-6 709
Paper end detector assembly PAPER END DETECTOR ASSEMBLY 1 F-7 710
Platen assembly PLATEN ASSEMBLY 1 F-7 711
Ribbon take-up gear assembly GEAR,RIBBON TAKE-UP ASSEMBLY 1 F-6 712
Carriage cover frame assembly FRAME,CARRIAGE COVER ASSEMBLY 1 F-2,3 713
Screw (C.B.S-tite F, 3X4) C.B.S-TITE F,3X4,F/ZN - F-2,3 714
Screw (C.P.S-tite F, 3X5) C.P.S-TITE F,3X5,F/ZN - F-2,3 715
Screw (C.C., 2X3) C.C.2X3,F/ZN - F-2,3 716
Screw (C.C., 3X5) C.C.SCREW,3X5,F/ZN - F-2,3 717
Nylon lock nut NYLON LOCK NUT M3 2 F-7 718
E-ring (1.5) RETAINING RING TYPE-E(1.5) - F-4,5,7 719
E-ring (2) RETAINING RING TYPE-E(2) F/UC - F-6,7 720
E-ring (3) RETAINING RING TYPE-E(3)F/UC - F-2,3,4,5,7 721
E-ring (4) RETAINING RING TYPE-E(4) F/UC - F-7 722
E-ring (5) RETAINING RING TYPE-E(5) F/UC - F-4,5,6 723
E-ring (2.3) RETAINING RING TYPE-E (2.3) F/UC - F-2,3,4,5,7 724
Screw (C.C.S-tite, 2.5X5) C.C.S-TITE SCREW,2.5*5,F/ZN - F-2,3,4,5 725
Screw (C.B.S-tite F, 3X6) C.B.S-TITEF,3X6,F/ZN - F-2,3,4,5,6 726
J/S change solenoid J/S CHANG SOLENOID 1 F-2,3 727
J/S change gear J/S CHANGE GEAR 1 F-2,3 728
Paper feed reduction gear PAPER FEED REDUCTION GEAR 2 F-2,3 729
Crank shaft holder CRANK SHAFT HOLDER 6 F-4,5,7 730
Paper feed trigger claw spring PAPER FEED TRIGGER CROW SPRING 3 2 F-4,5 731
Paper feed trigger attraction plate PAPER FEED TRIGGER ATTRACTIVE PLATE 2 F-4,5 732
Carriage motor MOTOR,CARRIAGE 1 F-6 733
Intermediate cable (type A) CABLE,INTERMEDIATE,A 1 F-6 734
Intermediate cable (type B) CABLE,INTERMEDIATE,B 1 F-6 735
Intermediate cable (type C) CABLE,INTERMEDIATE,C 1 F-6 736
Paper ejection detector cable (type A) assembly
CABLE ASSEMBLY,PAPER EJECTION DETECTOR,A
1 F-4,5 737
Paper ejection detector cable (type B) assembly
CABLE ASSEMBLY,PAPER EJECTION DETECTOR,B
1 F-2,3 738
Paper feed motor MOTOR,PAPER FEED 1 F-2,3 739
name for service manual name for price list q’ty page ref.#
Appendix E-14 Parts List Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Lead wire (type A) LEAD WIRE,A 1 F-4,5 740
Lead wire (type B) LEAD WIRE,B 1 F-4,5 741
Lead wire (type C) LEAD WIRE,C 1 F-4,5 742
Lead wire (type D) LEAD WIRE,D 1 F-4,5 743
Lead wire (type E) LEAD WIRE,E 1 F-4,5 744
Lead wire (type F) LEAD WIRE,F 1 F-4,5 745
Lead wire (type G) LEAD WIRE,G 1 F-4,5 746
Lead wire (type H) LEAD WIRE,H 1 F-4,5 747
Lead wire (type I) LEAD WIRE,I 1 F-4,5 748
Lead wire (type J) LEAD WIRE,J 1 F-4,5 749
Lead wire (type K) LEAD WIRE,K 1 F-4,5 750
Lead wire (type L) LEAD WIRE,L 1 F-6 751
Lead wire (type M) LEAD WIRE,M 1 F-6 752
Lead wire (type N) LEAD WIRE,N 1 F-6 753
Lead wire (type O) LEAD WIRE,O 1 F-7 754
Lead wire (type P) LEAD WIRE,P 1 F-7 755
Lead wire (type Q) LEAD WIRE,Q 1 F-7 756
Lead wire (type R) LEAD WIRE,R 1 F-4,5 757
Lead wire (type S) LEAD WIRE,S 1 F-4,5 758
Lead wire (type T) LEAD WIRE,T 1 F-4,5 759
Lead wire (type U) LEAD WIRE,U 1 F-2,3 760
Lead wire (type V) LEAD WIRE,V 1 F-2,3 761
Lead wire (type W) LEAD WIRE,W 1 F-2,3 762
Lead wire (type X) LEAD WIRE,X 1 F-2,3 763
Lead wire (type Y) LEAD WIRE,Y 1 F-2,3 764
Lead wire (type Z) LEAD WIRE,Z 1 F-2,3 765
Slip hold roller sleeve SLEEVE,SLIP HOLD ROLLER 1 F-2,3 766
Slip hold roller spring SPRING,SLIP HOLD ROLLER 1 F-2,3 767
Gear train cover COVER,GEAR TRAIN 1 F-6 768
Intermediate circuit board cover COVER,INTERMEDIATE CIRCUIT BOARD 1 F-6 769
Sub slip hold sleeve SLEEVE,SUB SLIP HOLD 2 F-4,5 770
Intermediate cable tube TUBE,CABLE INTERMEDIATE 1 F-6 771
C-ring (5103-21) C-RING,5103-21 2 F-7 772
Screw (C.B., 2.6X4) C.B.,2.6X4,F/ZN - F-4,5 773
J/S solenoid mounting plate MOUNTING PLATE,J/S SOLENOID 1 F-2,3 774
Screw (C.P.S-tite(P4), 3x6) C.P.S-TITE(P4),3X6,F/ZN - F-6 775
name for service manual name for price list q’ty page ref.#
Rev. B Parts List Appendix E-15
Confidential
Screw (C.B.P-tite, 3X8) C.B.P-TITE SCREW,3X8,F/ZN - F-4,5 776
MICR roller shaft SHAFT,MICR ROLLER 2 F-8 777
E-ring (1.2) RETAINING RING TYPE-E(1.2) F/UC - F-8 778
Motor shield spacer SPACER,MOTOR SHIELD 1 F-3 779
Motor shield case CASE,MOTOR SHIELD 1 F-3 780
Motor shield cover COVER,MOTOR SHIELD 1 F-3 781
MICR assembly ASSEMBLY,MICR 1 F-8 782
MICR case CASE,MICR 1 F-8 783
MICR lever fixing plate FIXING PLATE,MICR LEVER 1 F-8 784
MICR shield cover (type A) COVER,MICR SHIELD,A 1 F-8 785
MICR connector assembly CONNECTOR ASSEMBLY,MICR 1 F-8 786
MICR lever LEVER,MICR 1 F-8 787
MICR fixing MICR FIXING 1 F-8 788
MICR solenoid SOLENOID,MICR 1 F-8 789
MICR lever spring SPRING,MICR LEVER 1 F-8 790
MICR fixing sheet SHEET,MICR FIXING 1 F-8 791
MICR frame assembly FRAME,MICR ASSEMBLY 1 F-8 792
Screw (C.P.(S-P2), 2.5X5) C.P.(S-P2),2.5X5,F/Zn - F-8 793
Screw (C.P.(S), 2.6X8) C.P.(S)SCREW,2.6X8.F/ZN - F-8 794
Head seal SEAL,HEAD 1 F-6 795
MICR lever guide shaft SHAFT,MICR LEVER GUIDE 2 F-8 796
name for service manual name for price list q’ty page ref.#
Appendix E-16 Parts List Rev. B
Rev. B Exploded Diagrams Appendix F-1
TM-U675/U675P (without autocutter) Service ManualCoAppExp
TM-U
126
103
151
154
154
103
146
103
119
118
152
105
121125
142 141
147
205
150
117
143
116
101
120
124
122203
127
124
159
160
161
nfidentialendix Floded Diagrams
675/U675P
SERIAL
PARALLEL
158132
131
157
139
110
106
162
149
204600
102
109
112
113
114
109
113
114108
133
106
108
135
137
124
103 148
156103
106
136
138
107
107
107
107
107
107
201
206
106
106
106111
140
128
130
207
134104
103
144 145
129
153
164
163
202
112
155
107
107
202
155
123
Rev. B Exploded Diagrams Appendix F-2
TM-U675/U675P (without autocutter) Service ManualCoMec
691
714636
692
715764763
765
677
684
726726
717646
721729
726
647
647
651
6726
727
774
721
650
647
649
721728
724
721729
643
nfidentialhanism Assembly (without MICR)
725
635
738
714
690
609
714
713
610
645
721
616
717
721
628
739
760761762
610766
767
607
726
71
Rev. B Exploded Diagrams Appendix F-3
TM-U675/U675P (without autocutter) Service ManualCoMec
726
691
714636
692
715764763
765
677
684
726726
717646
721729
726
647
647
651
6726
727
774
721
650
647
649
721728
724
721729
643
nfidentialhanism Assembly (with MICR)
725
635
738
714
690
609
714
713
610
645
721
616
717
721
628
781
725
739
780
779
726
760761762
610766
767
607
726
71
Rev. B Exploded Diagrams Appendix F-4
TM-U675/U675P (without autocutter) Service ManualCoFram
726
705
745746747
704
726
726
649
721610
730723
637
721
686
656687
620
719
618
660725
740 741
nfidentiale Assembly (without MICR)
726
721610
726680
703748749750
661
667
613
612
726
726
726
726
671
732
732
621
622
731
731
609
609
695
726
726
662
673
606
696
609
742743744
737
719
724619
694
615614
773
617
730
644726
693
679
697
757758759
776
672
770
770
Rev. B Exploded Diagrams Appendix F-5
TM-U675/U675P (without autocutter) Service ManualCoFram
726
705
745746747
704
726
726
649
721610
730723
637
721
686
656
620
719
618
660725
740 741
nfidentiale Assembly (with MICR)
726
721610
726680
703748749750
661
667
613
612
726
726
726
726
671
732
732
621
622
731
731
609
609
695
726
726
662
673
606
696 609742743744
737
644
719
687
724619
694
615614
773
617
730
726
693
697
757758759
776
776
672
770
770
Rev. B Exploded Diagrams Appendix F-6
TM-U675/U675P (without autocutter) Service ManualCoCarr
726
nfidentialiage Assembly
608
623
689
720
603
633
775707
720
720
629
706
634
768
712
682
683601
720
603
632
753
751752
605
611
709
775
775
733
630
734
726
775775
769
735
771
708
736
723
631
726
795
Rev. B Exploded Diagrams Appendix F-7
TM-U675/U675P (without autocutter) Service ManualCoPF A
625
609
699
663
641
640
648
722
730602
648
722
702
655
722
720
663
638
675
602
730
639
648722
nfidentialssembly
685 711
685626
718
721
604
604
668
670659
624
674
654
678
666
642
663
654
658
652
724
724
721
664
772665
772 653
627
648
722
718
602649
701
609676
655
722
730
669
698
719 657
710
720
756755754
722
722730
721
Rev. B Exploded Diagrams Appendix F-8
TM-U675/U675P (without autocutter) Service ManualCoMIC
777
784
794
nfidentialR Unit
785
782
786
793
790
792
783
777
787
791
788
789
778
778
796
796
Rev. B General Lubrication Point Diagrams Appendix G-1
TM-U675/U675P (without autocutter) Service ManualCoAppGe
TM-U
G-36
G-36
G-36
nfidentialendix G
neral Lubrication Point Diagrams
675/U675P
SERIAL
PARALLEL
Rev. B General Lubrication Point Diagrams Appendix G-2
TM-U675/U675P (without autocutter) Service ManualCoMec
G-36
G-36
G-36
G-36
G-36
nfidentialhanism Assembly (without MICR)
G-36
G-36
Rev. B General Lubrication Point Diagrams Appendix G-3
TM-U675/U675P (without autocutter) Service ManualCoMec
G-36
G-36
G-36
G-36
G-36
nfidentialhanism Assembly (with MICR)
G-36
G-36
Rev. B General Lubrication Point Diagrams Appendix G-4
TM-U675/U675P (without autocutter) Service ManualCoFram
G-48
G-48
G-48
G-48
nfidentiale Assembly (without MICR)
G-36
G-48
G-48
G-48
G-48
G-36
G-36
G-36
G-36
Rev. B General Lubrication Point Diagrams Appendix G-5
TM-U675/U675P (without autocutter) Service ManualCoFram
G-48
G-48
G-48
G-48
nfidentiale Assembly (with MICR)
G-36
G-48
G-48
G-48
G-48
G-36
G-36
G-36
G-36
Rev. B General Lubrication Point Diagrams Appendix G-6
TM-U675/U675P (without autocutter) Service ManualCoCarr
nfidentialiage Assembly
G-36
G-36
G-36
G-36
G-36
G-36
G-36
G-36G-36
G-36
G-36
G-36
G-36
G-36O-10
G-36
G-36
G-36
O-10
Rev. B General Lubrication Point Diagrams Appendix G-7
TM-U675/U675P (without autocutter) Service ManualCoPF A
G-48
G-48
nfidentialssembly
G-36
G-36
G-36
G-48
G-48
Rev. B General Lubrication Point Diagrams Appendix G-8
TM-U675/U675P (without autocutter) Service ManualCoMIC
nfidentialR Unit
G-47
G-47
Rev. B Circuit Board Unit Circuit Diagrams Appendix H-1
TM-U675/U675P (without autocutter) Service ManualCoAppCirc
Main
page H-4
page H-5
nfidentialendix Huit Board Unit Circuit Diagrams
Circuit Board Assembly (Outline)
MICR I/F block (page H-6)
page H-2
page H-3
Rev. B Circuit Board Unit Circuit Diagrams Appendix H-2
TM-U675/U675P (without autocutter) Service ManualCoMain
nfidential Circuit Board Assembly (1 of 4)
Rev. B Circuit Board Unit Circuit Diagrams Appendix H-3
TM-U675/U675P (without autocutter) Service ManualCoMain
nfidential Circuit Board Assembly (2 of 4)
Rev. B Circuit Board Unit Circuit Diagrams Appendix H-4
TM-U675/U675P (without autocutter) Service ManualCoMain
nfidential Circuit Board Assembly (3 of 4)
Rev. B Circuit Board Unit Circuit Diagrams Appendix H-5
TM-U675/U675P (without autocutter) Service ManualCoMain
nfidential Circuit Board Assembly (4 of 4)
Rev. B Circuit Board Unit Circuit Diagrams Appendix H-6
TM-U675/U675P (without autocutter) Service ManualCoMain
nfidential Circuit Board Assembly (MICR I/F Block)
Rev. B Circuit Board Unit Circuit Diagrams Appendix H-7
TM-U675/U675P (without autocutter) Service ManualCoMain
nfidential Circuit Board Assembly (Memory Block)
Rev. B Circuit Board Unit Circuit Diagrams Appendix H-8
TM-U675/U675P (without autocutter) Service ManualCoRS-2
TP2
DK 1 1
DK S 2
PG 3
PG 4
+24V 5
+24V 6
PG 7
HOST RTS 8
CTS 9
RTS 11I/F DET 10
CLKOUT/DTR 12
CLKREQ 13
SG 14
+5V 15
DK 2 16
DK G 17
DK P 18
PG 19
+24V 20
+24V 21
PG 22
SG 23
SD 24
RD 25
(RES) 26
#25_RESET 27
DSR_RESET 28
#RESET 29
SG 30
CN2
DSRRTS
TO MAIN BOARD
+5V
ETT
C5
R1
R21
Q1
RDSD
DTR
RTS
+5V
SG
SG
SG
TP1
10K10K
10K10K
Q2
nfidential32 I/F Circuit Board Assembly (UB-S01) Circuit Diagram
DSR
+12V
+5VC1
VCC 16
C2+ 4
C2- 5
R1I 13
R2I 8
T1O 14
T2O 7
GND 15
V+ 2
C1+ 1
C1- 3
R1O 12
R2O 9
T1I 11
T2I 10
V- 6
U1
C2
C7
DSR
SD
RD
DTR
FG 1
SD/SD1 2
RD/SD2 3
RS/RD1 4
/RD2 5
DR/INIT1 6
SG 7
/DR1 8
/DR2 9
/CS1 10
/CS2 11
12
13
14
15
16
17
18
19
ER20
21
22
23
24
INIT2 25
SHELL 0
CN1
SG
RTS
TO HOST
C3
DTRSD
DSRRD
+12V
SG
RTS
DTR
SDRD
+5V
+5V
SG
RTS
SG
DSR_RES#25_RESE
+12V
-12V
R7
R3
+5V
+12V
RTS
#25|RESET
DSR|RESET
D1
D2R5
R2
R16
R4
R17
R18
C6
3
2 1
8
4
U2A
R20SG
DSR
R11
#25INIT
D3
D4
-12V
R13
R14
R6R15
C4
R10
R19
R12
5
6 7
U2B
SG
+12V
-12V
R9
R8
-12V
Rev. B Circuit Board Unit Circuit Diagrams Appendix H-9
TM-U675/U675P (without autocutter) Service ManualCoPara
nfidentialllel I/F Circuit Board Assembly (UB-P02) Circuit Diagram
Rev. B Circuit Board Unit Circuit Diagrams Appendix H-10
TM-U675/U675P (without autocutter) Service ManualCoRS-4
TP2
+5V
C5
R17
R16
R18
DK 11
DK S2
PG3
PG4
+24V5
+24V6
PG7
HOST_RTS8
CTS9
DET10
RTS11
CLKIN/DTR12
CLKREQ13
SG14
+5V15
DK 216
DK G17
DK P18
PG19
+24V20
+24V21
PG22
SG23
SD24
RD25
(RES)26
#25_RESET27
DSR_RESET28
#RESET29
SG30
CN2
+5V
+5VSGSG
SGCTS
DR
TO MAIN BOARD
TP1
R15R7
R14R19
SG
SG
RDSD
nfidential85 I/F Circuit Board Assembly (UB-S02) Circuit Diagram
+5VR12
1
2
3
4
8
7
6
5
U2R13R9
R8
R1
R2
FG 1
SD/SD1 2
RD/SD2 3
RS/RD1 4
/RD2 5
DR/INIT1 6
SG 7
/DR1 8
/DR2 9
/CS110
/CS2 11
12
13
14
15
16
17
18
19
ER20
21
22
23
24
INIT2 25
SHELL 0
CN1
FG
TO HOST
R6
R3
R11 R4
1
2
3
4
8
7
6
5
U1
R10
R5
CS1CS1
CS2 CS2
DR1
DR2
RD1
RD2
SD1
SD2 +5V
+5VCTS
CTS
SD
RD
SG
SG
DR
DR
SDRD
SG
SGSG
CS1CS2DR1DR2
RD2RD1
SD1SD2
SG
FG
TM-U675/U675P (with MICR) Service ManualConfidential
Appendix IPrinter HandlingUsing the Power Switch Cover
WARNING:If an accident occurs when the power switch cover is attached, unplug the power cord from the outlet immediately to avoid fire or shock.
You can use the enclosed power switch cover to make sure the power switch is not accidentally pressed. The illustration below shows the power switch cover installed.
Figure I-1 Power switch cover
If you need to turn the power on or off when the cover is installed, you can insert a thin tool into one of the holes in the cover to operate the switch.
switch cover
Rev. B Printer Handling Appendix I-1
Confidential
Opening the Front CoverYou can open the front cover of the printer by using the tabs on each side of the cover.
Figure I-2 Opening the front cover
Installing or Replacing the Paper Roll
You need to install a paper roll even if you are using only the slip or validation sections of the printer.
Note:Do not use paper rolls that have the paper glued or taped to the core because they might cause a paper jam.
1. Make sure the printer is turned on.
2. To prevent data loss make sure that the printer is not receiving data.
tab
Appendix I-2 Printer Handling Rev. B
TM-U675/U675P (with MICR) Service ManualConfidential
3. Open the paper roll cover by lifting up the two tabs on the paper roll cover and then pushingthe cover back.
Figure I-3 Opening the paper roll cover
4. Remove the used paper roll core if there is one.
5. Insert the paper roll as shown.
Figure I-4 Inserting the paper roll
tab
tab
Rev. B Printer Handling Appendix I-3
Confidential
6. Be sure to note the correct direction that the paper should come off the roll.Figure I-5 Correct direction
7. Hold both edges of the paper and insert it into the paper slot. The paper is automatically fed into the printer.
Figure I-6 Inserting the paper into the paper slot
paper slot
Appendix I-4 Printer Handling Rev. B
TM-U675/U675P (with MICR) Service ManualConfidential
8. When using 2-ply roll paper, insert the end of the journal paper into the take-up spool asshown below. Be sure that 40 to 60 mm (1.5 to 2.25 in.) of paper extends beyond the spool and that the right side of the paper is against the spool’s flange.
Figure I-7 Inserting the end of the journal paper into the take-up spool
9. Insert the take-up spool and tear off the receipt paper, as shown below.
Figure I-8 Inserting the take-up spool
Removing paper
If you need to remove roll paper before it is all gone, follow these steps:
1. Lift up the take-up spool with the journal paper attached.
Rev. B Printer Handling Appendix I-5
Confidential
2. Cut the paper off behind the paper insert slot.3. Push the release lever (located on the right side of the paper roll).
Then pull out the remaining paper in the paper feed direction. Always pull paper in the paper feed direction to prevent damage to the printer mechanism.
Figure I-9 Removing the paper
➀➀➀➀
➁➁➁➁
➂➂➂➂
Appendix I-6 Printer Handling Rev. B
TM-U675/U675P (with MICR) Service ManualConfidential
Installing the Ribbon CassetteTo install the ribbon cassette for the first time or to replace a used ribbon, follow the steps below:
Note:Be sure to turn on the power before installing a ribbon cassette.
1. Unpack the ribbon cassette and turn the knob in the direction shown to take up any slack.
Figure I-10 Turning the knob
2. Open the front cover of the printer, using the tabs on each side of the cover.
Figure I-11 Opening the front cover
3. Remove the old ribbon, if there is one.
knob
tab
Rev. B Printer Handling Appendix I-7
Confidential
4. Insert the new ribbon cassette as shown.Figure I-12 Inserting the new ribbon cassette
5. Turn the knob two or three times to make sure the ribbon is seated correctly. You can also look at the side of the slip unit to see if the ribbon is in the correct place. See below.
Figure I-13 Making sure if the ribbon is seated correctly
6. Close the front cover of the printer.
EPSON recommends the use of genuine EPSON ribbon cassettes. Ribbon cassettes not manufactured by EPSON may cause damage to your printer that is not covered by EPSON’s warranties.
edge of ribbon cassette
Appendix I-8 Printer Handling Rev. B
TM-U675/U675P (with MICR) Service ManualConfidential
Inserting Slip PaperWhen you insert slip paper, be sure that the right side of the paper is against the right side of the paper guide, as shown below.
Figure I-14 Inserting slip paper
Inserting Validaton Paper
When you insert validation paper, be sure that the right side of the paper is against the right side of the paper guide, as shown below.
Figure I-15 Inserting validaton paper
➀➀➀➀➁➁➁➁
➀➀➀➀➁➁➁➁
Rev. B Printer Handling Appendix I-9
Confidential
Reading MICR Characters On Personal ChecksTo use the MICR function with personal checks (for printers with the factory-installed optional MICR reader), follow the steps below:
CAUTION: Do not insert checks with staples in them. This may cause paper jams, MICR reading errors, and damage to the MICR head.
Note:Be sure that the checks are flat, without curls, folds, or wrinkles.
1. Wait until the computer sends the FS a 0 command to the printer, causing it to enter the MICR mode. The SLIP light blinks.
2. Turn the check over so that it is face up with the MICR characters on the right side. The MICR characters must be next to the right edge of the paper inlet.
Figure I-16 Inserting a check
3. Insert the check straight into the paper inlet, using the right edge of the paper inlet as a guide.
4. Insert the check as far as it will go. The printer will detect the check and start drawing it in.
5. When the printer starts drawing it in, let go of the check immediately. Otherwise, the check may not be fed straight, and there could be a paper jam or a MICR reading error. The SLIP light quits blinking but stays on.
6. When printing and MICR reading are finished, the printer ejects the check and the SLIP light starts blinking again.
7. Remove the check by pulling it straight up; do not pull it at an angle. The SLIP light goes off.
MICR characters on this side face up
Appendix I-10 Printer Handling Rev. B
TM-U675/U675P (with MICR) Service ManualConfidential
Adjusting the Roll Paper Near End DetectorThe paper near end detector detects when paper is almost gone by measuring the diameter of the paper roll. The detector has five settings. The factory setting (#5) leaves the least paper on the roll when the near-end sensor is triggered. If you want more paper on the roll when the sensor is triggered, choose one of the other settings, using the procedure below.
Note:Because of variations in paper roll cores, it is not possible for the detector to measure exactly the length of paper left on the roll when the detector is triggered.
1. Open the paper roll cover, and remove the paper roll.
2. Loosen the adjusting screw with a coin, and carefully move the detecting lever down. At the factory the lever is set at the highest position (#5). As you move the lever down through the five positions, you increase the amount of paper left on the roll when the near-end sensor is triggered.
Figure I-17 Adjustment screw and detecting lever
3. When you have moved the lever where you want it, tighten the adjusting screw, and check to be sure that the detecting lever moves freely.
4. Replace the paper roll.
adjusting screw
detecting lever
Rev. B Printer Handling Appendix I-11
Confidential
Using the Control PanelMost of the functions of this printer are governed by software, but you can monitor the printer’s status by looking at the lights on the control panel, and for some procedures you will use the buttons.
Control Panel
Figure I-18 Control panel
POWER
This light is on when the power is turned on.
ERROR
When this light is on but not blinking, it means that the printer is offline. Check to see if a cover is open. When this light is blinking, there is an error. If you see this light blinking, turn off the printer for a few seconds and then turn it back on. If the light is still blinking, see Chapter 1 Troubleshooting.
PAPER OUT
This light comes on when the printer is out or nearly out of roll paper. The printer has a paper end detector, and it also has a near-end detector (which can be adjusted) to warn you that the printer is nearly out of paper. See previous section if you want to adjust this detector.
This light blinks during the self-test printing standby state or macro execution standby state (when the macro execution command is used).
SLIP
This light blinks when the printer is ready to receive slip paper. It stays on during printing on slip paper and blinks again when slip paper should be removed.
Control Panel Buttons
The control panel has two paper buttons that you may have to use, although most paper handling functions will be handled by your software.
Appendix I-12 Printer Handling Rev. B
TM-U675/U675P (with MICR) Service ManualConfidential
FEEDUse this button to feed roll paper or to start a roll or validation paper self test.
RELEASE
Use this button to release slip paper or to start a slip or validation paper self test.
Rev. B Printer Handling Appendix I-13
Confidential
Appendix I-14 Printer Handling Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Appendix JScrew TypesFigure J-1 Screw configuration
Table J-1 Screw types
Head (top) Head (side) Body Washer (assembled)
C (Cross) P (Pan)
B (Bind)
C (Cup)
S-tite
B-tite
P-tite
T-B
(S) (Spring lock washer)
(S-P1)/(S-P2)/(S-P3)/(S-P4) (Spring lock washer + plain washer )
(O) (Outside toothed lock washer)
(P1)/(P2)/(P3)/(P4) (Plain washer)
(O-P1) (Outside toothed washer + plain washer)
Head (top)
Head (side)
Washer (assembled)
Body
Rev. B Screw Types Appendix J-1
Confidential
Appendix J-2 Screw Types Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Appendix KParts LayoutMain Circuit Board Unit (Parts Side)
(memory board)
Rev. B Parts Layout Appendix K-1
Confidential
Main Circuit Board Unit (Solder Side)(memory board)
Appendix K-2 Parts Layout Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
RS-232 I/F Circuit Board Assembly (UB-S01)Parallel I/F Circuit Board Assembly (UB-P02)
RS-485 I/F Circuit Board Assembly (UB-S02)
C5
15143029
121617
R7
U1
11
R1TP1
R9
13
25
1
14
R2CN1
R3
R
CMK-G2X
R4
U2
R11
R12
R13
R8
R15 TP2
R5 R18
R14 R16 R19R17
R10R6
CN2 RS485-30P
BOARD
Rev. B Parts Layout Appendix K-3
Confidential
Appendix K-4 Parts Layout Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Addendum 1Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model)EPSON provides an optional model of the TM-U675 for customers, such as banking and financial institutions, that want to use the slip and MICR functions of the printer without loading roll paper. This model contains two paper path spacers and special firmware on the main circuit board unit.
Information throughout the main part of this manual applies to the TM-U675 model that does not use these paper path spacers. This addendum explains only the differences for the TM-U675 model that uses paper path spacers.
When performing maintenance on the TM-U675 model that supports paper path spacers, use this addendum along with the main part of this manual.
For brevity, this addendum refers to the TM-U675 model that uses paper path spacers as the “PPSS model,” and it refers to the TM-U675 model that does not use paper path spacers as the “PPSUS model.”
Note that this model is called as the validation/slip model from sales point of view.
The contents of this addendum are shown below.
Addendum Table 1-1 Contents of this addendum
Item Content
TM-U675 PPSS model configuration
Explains the differences between the parts for the TM-U675 PPSS model and the TM-U675 PPSUS model.
TM-U675 PPSS model repair Lists precautions when repairing the TM-U675 PPSS model.
How to identify the TM-U675 PPSS model
Explains how to identify the TM-U675 PPSS model.
Attaching and removing the spacers
Explains how to attach and how to remove the spacers.
Setting the threshold values for the detectors
Explains how to set the threshold values for the detectors on the TM-U675 PPSS model.
Rev. B Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Addendum 1-1
Confidential
TM-U675 PPSS Model ConfigurationThe following three components differ between the TM-U675 PPSS model and the TM-U675 PPSUS model.
Note: The only difference between the main circuit board unit for the PPSS and PPSUS model is in the
firmware.
The assist paper guide spacer and the roll paper path spacer are both called “paper path spacers” in this addendum.
TM-U675 PPSS model is shipped with the paper path spacers installed. It is possible for the customer to remove the paper path spacers from the TM-U675 PPSS model.
Addendum Table 1-2 Configuration of the TM-U675 PPSS model
Part names in the addendum(Part names in the price list)
TM-U675 PPSS model
TM-U675 PPSUS model
assist paper guide spacer(spacer,assist paper guide)
Installed Not installed
roll paper path spacer(spacer,roll paper pass)
Installed Not installed
main circuit board unit(main circuit board unit)
The main circuit board unit for the PPSS model is installed.
The main circuit board unit for the PPSUS model is installed.
Addendum 1-2 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
TM-U675 PPSS Model RepairObserve the following precautions when repairing the TM-U675 PPSS model.
Always use the main circuit board unit for the PPSS model. Normal operation cannot be guaranteed if you use the the main circuit board unit for the PPSUS model.
Always set the threshold values for the detectors with the paper roll removed and paper path spacers installed.
Rev. B Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Addendum 1-3
Confidential
How to Identify the TM-U675 PPSS ModelBefore starting your maintenance work, use the following procedures to verify that the printer you are working on is a TM-U675 PPSS model.
1. Check the manufacturing nameplate on the right side of the printer, when you are facing the front of the printer.
Addendum Figure 1-1 Location of the manufacturing nameplate
2. Check the type code inscribed on the manufacturing nameplate. Check Addendum Table 1-3 for the type code corresponding to TM-U675 PPSS model.
Addendum Figure 1-2 Checking the type code
Note:Type codes may be added or changed. Always check them using the latest manual.
Addendum Table 1-3 Type code corresponding to the PPSS model
Type code for the PPSS model
121
Manufacturing nameplate
Type code
Addendum 1-4 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Installing and Removing the Paper Path SpacerRemoving the Paper Path Spacer
1. Turn off the power supply to the printer.
2. Open the roll paper cover.
3. Insert the tip of a pen or tweezers into the perforation in the assist paper guide spacer and lift the assist paper guide spacer directly vertical.
Addendum Figure 1-3 Lifting the assist paper guide spacer
4. Lift the assist paper guide spacer and pull it out from the roll paper ejection slit.
Addendum Figure 1-4 Pulling out the assist paper guide spacer
Step 1.Insert the tip of a pen or tweezers into the perforation in the assist paper guide spacer.
Step 2.Lift the assist paper guide spacer directly up.
Assist paper guide spacer
Roll paper ejection slit
Lift the assist paper guide spacer
Assist paper guide spacer
Rev. B Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Addendum 1-5
Confidential
5. Lift the edge of the roll paper path spacer and pull the tab out from the guide rollershaft.
Addendum Figure 1-5 How to pull out the tab
6. While holding down the right side of the sub paper hold roller shaft, grasp the tab on the roll paper path spacer and pull out the roll paper path spacer along the paper path.
Addendum Figure 1-6 Removing the roll paper path spacer
Tab
Roll paper path spacer
Guide roller shaft
Sub paper hold roller shaft
Tab
Roll paper path spacer
Addendum 1-6 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Installing the Paper Path SpacerThe hard surface of the roll paper path spacer is the face. The soft surface is the back. When the tab is facing up and you are looking at the face, the center opening is slightly right of center.
Addendum Figure 1-7 Checking the front and back of the roll paper path spacer
1. Turn off the power supply to the printer.
2. Open the roll paper cover.
3. Push the right side of the sub paper hold roller shaft down.
4. Place the face of the roll paper path spacer up and insert along the paper path until it touches.
Addendum Figure 1-8 Inserting the roll paper path spacer
5. Check that the roll paper path spacer is completely inserted all the way until it touches. Release the sub paper hold roller shaft that you are holding down.
Tab
Center opening is slightly right of center
Roll paper path spacer
Face is hard
Back is soft
Sub paper hold roller shaft
Tab
Roll paper path spacer
Rev. B Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Addendum 1-7
Confidential
6. Push the tab on the roll paper path spacer with your fingertips, bend it upward, and fit itunder the guide roller shaft.
Addendum Figure 1-9 Fitting the tab
7. Fold the perforations of the assist paper guide spacer as shown in the following figure.
Note:When you use the perforation as a boundary, the side with a notch is the back, the side without a notch is the front.
Addendum Figure 1-10 Folding perforation
Bend tab upward
Fit tab under guide roller shaft
Guide roller shaft
Notch
The side with a notch is the back.
The side without a notchis the front.
Perforation Assist paper guide spacer
Addendum 1-8 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
8. Pinch the front and back of the assist paper guide spacer with your fingertips and insertthe front into slit A and the back into slit B.
Note:There are two slits. The slit closest to the manual cutter blade is “slit A” and the slit farthest from the manual cutter blade is “slit B.” A partition separates “slit A” and “slit B.”
Addendum Figure 1-11 Inserting the assist paper guide spacer
9. Insert the front of the assist paper guide spacer vertically into slit A along the partition until you feel it touch.
Addendum Figure 1-12 Inserting the assist paper guide spacer
Manual cutter blade
The slit closest to the manual cutter blade is “slit A.”
The slit farthest from the manual cutter blade is “slit B.”
Partition
Front
Back
Assist paper guide spacer
Step 1.Position the front vertically.
Step 2.Insert until you feel it touch.
Assist paper guide spacer
Rev. B Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Addendum 1-9
Confidential
10. Push the perforation of the assist paper guide spacer while pressing the release lever.Release the release lever when you hear a “click” and you feel it engage.
Addendum Figure 1-13 Checking that it is engaged and that there was a “clicking” sound
11. Remove the take-up assembly.
12. Open the clamshell mechanism.
13. Check that the assist paper guide is closed. If the assist paper guide is not closed, close the clamshell mechanism, remove the assist paper guide spacer, and repeat from step 8.
Note:Press the assist paper guide with an appropriate amount of force. If the assist paper guide does not move, it is closed. If the assist paper guide moves, it is not closed.
Addendum Figure 1-14 Checking the assist paper guide
14. Close the clamshell mechanism.
15. Attach the take-up assembly.
16. Set the threshold values for the detectors.
Step 1.Press the release lever
Step 2.Push the perforation of the assist paper guide spacer
Assist paper guide spacer
Assist paper guideClamshell mechanism
Press the assist paper guide with an appropriate amount of force to check.
Addendum 1-10 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Rev. B
TM-U675/U675P (without autocutter) Service ManualConfidential
Setting Threshold Values for DetectorsDo this when you have removed or replaced any of the following.
CAUTION:Work indoors to avoid direct sunlight when setting the values. Use normal fluorescent lighting available in most rooms. You will not be able to make accurate setting if there is natural light (sunlight) or man-made light sources (lamps, etc.) other than fluorescent lighting.
Allow all the light from the fluorescent bulb to enter the printer when working. You will not be able to make accurate adjustments if you allow a shadow to fall on the printer or you turn off the fluorescent lighting while working.
1. Check that the paper path spacers are installed.
2. Install the paper path spacers if they are not installed. If roll paper is installed, remove it.
Note:The paper path spacers must be installed correctly to set the threshold values of the detectors accurately.
3. Remove slip paper if it is inserted.
Note:You cannot make accurate settings if slip paper is present.
4. Connect the power supply to the printer.
5. Attach the ribbon cassette.
6. Open the roll paper cover.
7. Turn ON the power switch for the printer while holding down the FEED and RELEASE buttons at the same time.
8. Press the RELEASE button 7 times.
9. Close the roll paper cover.
Items Requiring Setting
The slip T. O. F. detector assembly.
The slip B. O. F. detector assembly.
The paper ejection detector assembly.
The validation detector assembly.
The mechanism assembly.
The main circuit board unit.
Rev. B Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Addendum 1-11
Confidential
10. Check that the SLIP LED is flashing. If it is not flashing, repeat from step 6.11. Insert a slip.
Note:The printer automatically sets the detectors and saves the setting values in the main circuit board unit; then it prints the setting values on the slip paper.
12. If the customer uses the TM-U675 PPSS model with the paper path spacers removed, remove the paper path spacers.
13. Remove the ribbon cassette.
Addendum 1-12 Maintenance of the TM-U675 Model with Paper Path Spacers (Validation/Slip Model) Rev. B
SEIKO EPSON CORPORATION Printed in Japan
EPSON
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