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Page 1: Lexmark X548 Color Product Study Guidecontentdelivery.lexmark.com/webcontent/training/X548/X548_Study... · X548 Photoconductor / Imaging Unit / Developer ... (CCD) Light Source LED

Lexmark X548 

Color Product Study Guide

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Edition: May 2011 Revision: 1.1 The following paragraph does not apply to any country where such provisions are inconsistent with local law: LEXMARK INTERNATIONAL, INC. PROVIDES THIS PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain transactions; therefore, this statement may not apply to you. This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in later editions. Improvements or changes in the products or the programs described may be made at any time. Comments may be addressed to Lexmark International, Inc., Services Training/008-2, 740 West New Circle Road, Lexington, Kentucky 40550, U.S.A or e-mail at [email protected]. Lexmark may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you. References in this publication to products, programs, or services do not imply that the manufacturer intends to make these available in all countries in which it operates. Any reference to a product, program, or service is not intended to state or imply that only that product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any existing intellectual property right may be used instead. Evaluation and verification of operation in conjunction with other products, programs, or services, except those expressly designated by the manufacturer, are the user’s responsibility. Lexmark, Lexmark with diamond design, and MarkNet are trademarks of Lexmark International, Inc., registered in the United States and/or other countries. PCL® is a registered trademark of the Hewlett-Packard Company. All other trademarks are the property of their respective owners. © 2011 Lexmark International, Inc. All rights reserved. UNITED STATES GOVERNMENT RIGHTS This software and any accompanying documentation provided under this agreement are commercial computer software and documentation developed exclusively at private expense.

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Table of Contents

TECHNICAL INFORMATION ......................................................................................... 1

X548 SPECIFICATIONS..............................................................................................................................1 X548 PRINT AND COPY SPEED..................................................................................................................1 X548 FAX SPECIFICATIONS.......................................................................................................................2 X548 SCANNER SPECIFICATIONS ..............................................................................................................3 X548 MEDIA OPTIONS ..............................................................................................................................4 X548 MEDIA SOURCES AND CAPACITIES ...................................................................................................5 X548 SUPPLY ITEMS.................................................................................................................................6

Toner Cartridges ..............................................................................................................................6 X548 Photoconductor / Imaging Unit / Developer............................................................................6 X548 Waste Toner Bottle .................................................................................................................8

THEORY OF OPERATION ............................................................................................. 9

X548 FAX SYSTEM ...................................................................................................................................9 X548 SCANNER SYSTEM.........................................................................................................................10

Document scanning at the flatbed .................................................................................................10 X548 Document Scanning at the ADF (Auto Document Feeder) ..................................................11 X548 ADF Components .................................................................................................................12 X548 ADF Paper Path....................................................................................................................13

X548 ELECTROPHOTOGRAPHIC PROCESS ...............................................................................................14 Charge ...........................................................................................................................................15 Expose ...........................................................................................................................................16 Develop ..........................................................................................................................................17 1st Transfer .....................................................................................................................................18 2nd Transfer ....................................................................................................................................19 Fuse ...............................................................................................................................................20 Clean/Erase ...................................................................................................................................21 EP Process Key Components........................................................................................................22

PAPER TRANSPORT SYSTEM ...................................................................................................................24 X548 Paper Transport System Key Components Diagram ...........................................................25 X548 Print Engine Paper Path .......................................................................................................27 X548 Paper Jam Locations............................................................................................................28

OPERATOR PANEL..................................................................................................... 29

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X548 PANEL BUTTONS ...........................................................................................................................29 X548 Home Screen........................................................................................................................31 X548 Home Screen Buttons ..........................................................................................................32

X548 ADMINISTRATIVE (CUSTOMER) MENU .............................................................................................33 X792 Service Menus......................................................................................................................34

PRINT QUALITY DIAGNOSTIC TIPS .......................................................................... 36

GENERAL TERMINOLOGY ........................................................................................................................36 PRINT QUALITY RULES OF THUMB ...........................................................................................................37

PAPER TRANSPORT DIAGNOSTIC TIPS .................................................................. 38

PAPER RULES OF THUMB........................................................................................................................38

X548 FAX DIAGNOSTIC TIPS ..................................................................................... 39

FAX RULES OF THUMB ............................................................................................................................39 Fax Send Problems........................................................................................................................39 Fax Receive Problems...................................................................................................................40 Other problems ..............................................................................................................................40

COMPLEX PARTS AND PROCEDURES .................................................................... 42

FLATBED SCANNER ASSEMBLY .........................................................................................43

ADF ASSEMBLY .....................................................................................................................43

TOP COVER ......................................................................................................................43

RIP BOARD ...........................................................................................................................43

OPERATOR PANEL ............................................................................................................................47

PRINTHEAD ............................................................................................................................47

ITU .............................................................................................................................................48

HVPS ..........................................................................................................................................48 MIRRORED NVRAM COMPONENTS .........................................................................................................50

RIP Board .....................................................................................................................50

Operator Panel ........................................................................................................................50 CLEANING THE MFP DOCUMENT GLASS..................................................................................................51 UPDATING PRINTER/SCANNER CODE.......................................................................................................52

CIRCUIT BOARD LOCATION...................................................................................... 54

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Technical Information

X548 Specifications X548 Series

Processor

Speed and Type 900MHZ Power PC Processor

Memory

Standard 512 MB

Optional 256MB, 512MB and 1 GB 200-pin X 64 DDR2 SO-DIMMs

Max Memory 1536 MB

Hard Drive Size (X548dte only) 160 GB or Higher

Hard Drive Type (X548dte only) 2.5 Notebook Style Hard Drive, Serial ATA-150 Interface, Speed: 5400 or 7200 RPM

Optional Flash Memory 256 MB

Speaker Yes

Connections

Standard1 10/100/1000 Gigabit Ethernet & USB

Option Slots

DRAM DIMM Slots 1

Wireless Option N/A

ISP (INA) Slots N/A DLE Firmware, Flash Memory, or Font Card Slot 1

X548 Print and Copy Speed

X548 Media Size Mono Color

Letter (plain) 25 25 A4 (plain) 23 23

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X548 Fax Specifications Feature Performance

Fax Send Transmission Speed – 33.6Kbps1 <3 seconds per page

Fax Storage

If a hard drive is installed then faxes are stored on the hard drive and the fax storage is the size of the hard drive less 1 GB. If a hard drive is not installed then faxes are stored on the Flash. The maximum fax storage size on flash is 18 MB.

Fax Shortcuts (a.k.a. Speed Dials)

500* *Based on an average shortcut: Average shortcut includes: 25 characters for Name, 10 characters for number and 4 characters for Shortcut Id

Maximum locations in a shortcut

Note: Maximum characters – 512 and each location separated by a semi colon. 46 locations using a 10 digit phone number 64 locations using a 7 digit phone number

Broadcast Fax 400 locations – each number in a fax shortcut is a location

Manual Fax Yes - Disabled by default

Fax from PC Supported using Postscript driver for both local and network attach models

Fax Forwarding 1 Shortcut 1 Based on ITU-T Test Chart #1 – Test Format Business Letter

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X548 Scanner Specifications X548 Scanner Scanner Type Color Flatbed Scanner with ADF Scan Technology Charge Coupled Device (CCD) Light Source LED Number of Light Sources 1 Scanner ADF ADF Type Duplex (RADF—Re-circulating Automatic Document Feeder)

Mono Simplex – 20spm Letter / 18spm A4 Color Simplex – 20spm Letter / 18spm A4

Mono Duplex – 8spm Letter / 8spm A4 ADF Scan Speed

Color Duplex – 8spm Letter / 8spm A4 ADF Document Input & Output Capacity 50 Sheets, 20 lb. (75 g/m2) Paper

ADF Document Stack Height Up to 8mm (approx 50 sheets of printed 5% coverage, 20lb fanned paper, uncompressed, at ambient environment

Max. 32lb (120g/m2) Scanner Media Weight

Min. 14lb (52g/m2) Max. 8.5” x 14.0” (216mm x 355mm) Short Edge Feed (SEF)

ADF Document Size Min. 3.0” x 5.5” (114.3mm x 139.7mm) Short Edge Feed (SEF)

ADF Document Size Sensing n/a ADF Document Sensing Yes ADF Media Jam Sensing Yes

Scanner Flatbed Flatbed Max Document Size Max. 8.5” x 11.7” (216mm x 297.18mm) Flatbed Scanner Media Depth (Thickness) Up to .5 inch (12.7mm)

Document Size Sensing n/a

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X548 Media Options

Options

650 Sheet Duo Drawer (550 drawer + 100 MPF) (Comes standard on the X548dte)

550 Sheet Drawer (Installs underneath the 650 Sheet Duo Drawer – cannot be used without the Duo Drawer attached)

Lexmark Swivel Cabinet Recommended with the optional 550 sheet Drawer to support the printer and options. The cabinet swivels and has a drawer that can hold up to three reams of paper (letter or A4) and three sets of toner cartridges.

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X548 Media Sources and Capacities

Source X548de X548dte

Standard Input

Primary Tray Capacity 250 250

Manual Slot 1 1

N/A 550 Duo-Drawer 2nd Tray Capacity MPF Tray Capacity N/A 100

Number of Standard Sources 2 4

Total Standard Capacity 251 901

Optional Input

550 Sheet Drawer Yes Yes

Yes Standard

550 Standard Duo-Drawer 2nd Tray Capacity MPF Tray Capacity

100 Standard

Max Additional Sources 3 1

Max Input Sources 5 5

Max Input Paper Capacity 1451 1451

Output

Max Output Paper Capacity 150 150

Other

Duplex Automatic (Standard) Automatic (Standard)

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X548 Supply Items Toner Cartridges

X548 Photoconductor / Imaging Unit / Developer

Approximate Yield 1 Ships with printer Aftermarket Version

Available

Photoconductor Unit 4 30,000 pages Yes Yes C, M, Y & K Developer Units 2 30,000 pages Yes Yes Black & Color Imaging Kit 1,3 30,000 pages No Yes Black Imaging Kit 1,3 30,000 pages No Yes

1 Yield is based an average of 3 pages per job and approximately 5% coverage per color. Yields may vary depending on customer usage. 2 Yield is based on approximately 5% coverage per color with printer set at factory defaults. 3 An Imaging unit is a Photoconductor Unit with Developer(s) included. 4 The individual Photoconductor or Developer Units should ONLY be replaced if they are damaged or causing a print quality defect. Otherwise, the appropriate Imaging Kit should be replaced.

When “Replace Black and Color Imaging Kit” or “Replace Black Imaging Kit” appears on the display, the customer needs to order a new Kit. Consult the User’s Guide for installation instructions. The contents of each kit are as follows:

Toner Cartridges Approximate Yield 1

Ships with Printer

Return Program Version Available

Toner Cartridge CMYK 1000 pages No Yes 2

High Yield Toner Cartridge K 2500 pages No Yes

High Yield Toner Cartridge CMY 2000 pages No Yes

Extra High Yield Toner Cartridge K 8000 pages Yes Yes Extra High Yield Toner Cartridge CMY 4000 pages Yes Yes 1 When used in the X548 Series MFP, the average continuous Composite CMY Cartridge yield is standard pages as listed, and the average continuous K (black) Cartridge yield is standard pages as listed, in accordance with ISO/IEC 19798 2 Non-Return Program Cartridge not available.

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Black Imaging Kit The kit includes the Black Developer Unit and the 4 Photoconductors pre-installed in the Imaging Basket. The customer needs to remove the C, M and Y Developer Units from the old Imaging Basket and install them in the new Imaging Basket.

Black and Color Imaging Kit The kit includes all 4 Developer Units (C, M, Y and K) and the 4 Photoconductors pre-installed in the Imaging Basket. Nothing from the old Imaging Basket is transferred to the new Kit.

Imaging Basket (with Photoconductors installed)

Black Developer Unit

Imaging Basket (with Photoconductors installed)

C, M, Y and K Developer Units

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X548 Waste Toner Bottle

Approximate Yield 1 Ships with printer Aftermarket Version

Available

Waste Toner Bottle 18,000 color, 36,000 mono Yes Yes

1 Yield is based on approximately 5% coverage per color with printer set at factory defaults.

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Theory of Operation

X548 Fax System The three basic units of a fax are the scanner (for reading the image), the control circuit, and the printer. The scanner splits the image into a fine grid, and then reads the brightness (white/black) of each cell. The scanner consists of a lamp that illuminates the original document with uniform light and a charged coupled device (CCD) that reads the light reflected from the image. The white/black information is converted to a digital signal: bright cells become 1, dark cells 0. The digital signal from a scanned image is subjected to digital to analog conversion (modulation) by the control circuit to enable transmission over an analog telephone line. After conversion, the data is sent as an analog signal. The sound audible during transmission is image data that has become an analog signal. The analog signal arriving over the telephone line is then subjected to analog to digital conversion (demodulation) by the control circuit of the receiving fax machine, and restored to a digital signal. The black/white information obtained from the analog to digital conversion is sent to the printer, where black cells are reproduced on the paper at the positions where they were on the original.

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X548 Scanner System The document scanning section consists of a scanner that reads a single-sheet document placed on the flatbed glass and an Auto Document Feeder (ADF) that can read the pages of a multiple-sheet and/or duplexed document. Document scanning at the flatbed When scanning on the flatbed, the carriage motor moves the CCD Imaging Unit underneath the glass. The document image is acquired as the CCD Imaging Unit scans the length of the flatbed. Once complete the carriage motor returns the CCD Imaging Unit to its home position. The home position is determined by a Home Position Sensor in the scanner unit. X548 Flatbed Scanner Key Components Table

Number Component Function

1 (Hidden) Scanner Home Position Sensor Detects the registration position of the scanner.

2 (Hidden) CCD Imaging Unit Shines light onto the document (LED).

3 ADF Open Sensor Detects if the ADF lid is open. 4 Flatbed Glass Glass surface where the document is scanned.

2

3

4 1

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X548 Document Scanning at the ADF (Auto Document Feeder) When scanning, the MFP will default to the flatbed scanner unless the Paper Present Sensor on the ADF detects the presence of media. If media is detected, the ADF Pick Roll feeds the media into the ADF. As it the media moves into the ADF the Document Sensor is actuated. The Document Sensor determines the first side of the document to be scanned and signals the flatbed Carriage Motor to move the CCD Imaging Unit to the ADF scan area. Once the CCD reaches the ADF scan area, a calibration is performed on the CCD. The media advances toward the ADF Scan Sensor near the takeaway roll. If the paper does not reach the ADF Scan Sensor in the predetermined length of time, a jam error will post on the operator panel. Once the media does reach the sensor, the ADF Motor and ADF Scan Sensor ensure that the media is traveling at the correct speed through the Scan Area. The speed is determined by several factors including the image DPI. The image acquisition process initiates when the media reaches the scan area. As the trailing edge of the media passes the ADF Scan Sensor, a signal is sent to the RIP Board that the end of the media is near. The image acquisition process will continue for the predetermined amount of time depending on the image DPI and paper size. If the scan job is only simplex, the media continues to the Exit Roller and exits the ADF. If the scan job is duplex, a solenoid on the ADF actuates as the trailing edge of the media reaches the reverse point in the ADF. This solenoid moves a Diverter Gate to the down position, and engages a reversing gear on the Exit Roll. The reversed Exit Roll pulls the paper back into the ADF and the Transport Roll moves the media to the Duplex Sensor. When the Duplex Sensor actuates, it signals the RIP Board that this is the second side of the media to scan and to stop the turning of the Exit Roll. The Transport Roll continues to move the media toward the Take Away roll and the ADF Scan Sensor. Like the first pass of the media, the image acquisition process is repeated for the second side of the media. Once the trailing edge of the media reaches the reverse point the second time, the solenoid moves the Diverter Gate to the down position, and reverses the Exit Roll. The paper goes back into the ADF unit for a third time, however, no imaging occurs. This pass is to turn the paper over so the original side is facing up. When the media’s trailing edge reaches the reverse point in the third pass, the solenoid does not actuate the Diverter Gate. The media continues to the Exit Roller and exits the ADF. See the X548 ADF Components and ADF Paper Path images located on the following two pages.

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X548 ADF Components X548 ADF Key Components Table

Number Component Function 1 Duplex Sensor Detects the registration position of the scanner.

2 Document Sensor Determines the first side of the document to be scanned and signals the flatbed Carriage Motor to move the CCD Imaging Unit to the ADF scan area.

3 ADF Pick Roll Feeds the media into the ADF. 4 (Hidden)

Paper Present Sensor Detects the presence of media to scan in the ADF.

5 Reverse Point The point where the media is reversed back into the ADF for duplex scanning and for the third pass to turn the paper over so the original side is facing up.

6 Exit Roll Ejects the media into the output bin. Also reverses the media back into the ADF for duplex scanning and for the third pass to turn the paper over so the original side is facing up.

7 Diverter Gate Diverts the media into the duplex paper path for two-sided scanning. 8 Transport Roll Feeds the media toward the Exit Roll from the scanning area. 9 (Hidden) CCD Imaging Unit Shines light onto the document (LED).

10 Scan Area The area where the document is scanned by the CCD Imaging Unit.

11 ADF Scan Sensor Helps to ensure that the media is traveling at the correct speed through the Scan Area.

12 Takeaway Roll Feeds the media into the Scan Area.

1 2 3

4

5

6

7

8

9

10

11

12

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X548 ADF Paper Path

Simplex Paper Path Duplex Paper Path

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X548 Electrophotographic Process This color laser printer uses the Electrophotographic process (EP Process) to image toner onto the media via a tandem (in-line) system. This system contains four color cartridge assemblies (cyan, yellow, magenta, and black). The Electrophotographic Process steps are as follows:

• Charge – Photoconductor Drum surface is charged with electricity from the Bias Charge Roll,

• Expose – the laser (printhead) exposes the photoconductor with light and creates a Latent Image on the surface,

• Develop – while in contact with each other, toner from the Developer Roll adheres to the latent image on the surface of the photoconductor. This happens because of a difference in charge potential between the two surfaces,

• 1st Transfer – an electrical charge is sent to each of the four 1st Transfer Rolls inside the ITU (Transfer Belt). Due to the difference in charge potential, toner is transferred from the Photoconductor to the surface of the ITU as it passes each photoconductor.

• 2nd Transfer – the media passes in between the Transfer Roller and ITU surfaces. An electrical charge is sent to the Transfer Roller to create a difference in charge potential. Because of this difference in charge, toner is transferred from the ITU to the surface of the media.

• Fuse – Toner is bonded permanently to the media by heat and pressure.

• Clean/Erase – The Photoconductor and ITU Belt surfaces are cleaned of residual toner. This printer does not have erase lamps.

If a component fails, it is important to recognize at which step the failure took place. By knowing this, you can determine the source of the problem. Understanding the EP Process is the key to troubleshooting print quality problems. The next few pages illustrate the various EP Process steps with a cross-sectional of an X548 printer.

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Charge During the charge step, voltage is sent from the high-voltage power supply to the charge roller located beside each of the four photoconductors (the charge roller is part of the photoconductor unit). The charge roller puts a uniform negative charge over the entire surface of the photoconductor to prepare it for exposure by the laser beam.

Charge Rollers

Photoconductors

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Expose During the expose step, the laser fires a focused beam of light at the surface of each color Photoconductor and writes an invisible image called a latent image or electrostatic image. This invisible image is created by discharging the Photoconductors only where the laser beam strikes its surface. This creates a difference in charge potential between the exposed area and the rest of the photoconductor surface.

Service Tips:

The laser beam passes through a glass lens as it exits the laser unit. If this lens gets contaminated with toner or other debris, it will cause vertical streaking of white/lightness on the page. Cleaning the lens will solve the problem. Never touch the surface of the photoconductor with your bare hand. The oil from your skin may cause a charge differential on the surface and toner will not stick properly. The result would be repeating blotches of voids/light print on a page. Then the photoconductor will have to be replaced. The surface of the photoconductor is coated with an organic substance that makes it sensitive to light. Be sure and cover the photoconductor when you are working on the printer so you don’t “burn” it. If exposed to light for too long, it will cause light/dark print quality problems and have to be replaced.

Laser Beam

Photoconductors

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Develop Once the laser exposes the Photoconductor, the HVPS sends charge to the Developer Roll. For each color, the Developer Roll engages the Photoconductor so it is in contact with the surface. Because of the charge difference between the toner on the Developer Roller and the electrostatic image on the Photoconductor, toner only attracts to the Photoconductor where the laser exposed the surface. This process would be similar to using glue to write on a can and then rolling it over glitter. The glitter sticks to the glue but won’t stick to the rest of the can.

Service Tips:

Never touch the surface of the developer roller with your bare hand. The oil from your skin may cause a charge differential on the surface and toner will not stick properly. The result would be repeating blotches of voids/light print on a page. Then the affected cartridge will have to be replaced. If the developer roller is damaged, it will not contact the surface of the photoconductor properly. The result could be repeating marks, thin vertical voids or thin vertical lines of color on the printed page. Check the surface of the developer for damage.

Developer Rolls

Photoconductors

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1st Transfer When the latent images are developed on each Photoconductor, the high-voltage power supply sends voltage to the 1st Transfer Rollers inside the ITU. The charge difference between the developed toner image on the Photoconductor surface and the 1st Transfer Rollers causes the images to transfer to the surface of the ITU belt for each color. This takes place by a direct surface-to-surface contact between the Photoconductors and the ITU belt.

Service Tips:

Never touch the surface of the ITU belt with your bare hand. The oil from your skin will cause a charge differential on the surface and toner will not stick properly. The result would be repeating blotches of voids/light print on a page. Then the ITU belt will have to be replaced. Don’t use solvents or other cleaners to clean the ITU belt surface. No matter how careful you are, the surface will be compromised causing scratches or a charge differential that will produce a void or light blotch on the printed page. Then the ITU belt will need to be replaced.

1st Transfer Rollers

ITU (belt surface)

Photoconductors

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2nd Transfer Once the four planes of color are transferred to the ITU from the Photoconductors, the image is carried towards the Transfer Roll (this is part of the ITU assembly). The media is picked from the input source and timed to pass between the ITU Belt and Transfer Roll when the image on the Belt reaches the second transfer area. The high voltage power supply sends voltage to the Transfer Roll to create a positive charge. As the media passes between the ITU and Transfer Roll, the entire image is transferred to the media due to the charge differential between the negative toner on the ITU Belt and the positive Transfer Roller.

Service Tips If the transfer roller has nicks, pits or flat spots on it, the surface doesn’t come into contact with the media and transfer unit properly. This will cause voids or lights spots on the page or repeating voids/light areas, because the toner can’t be fully transferred due to the charge difference in the areas of damage. If the transfer roller does not engage the transfer unit, or does not have voltage coming from the high voltage power supply, the toner will not fully transfer from the transfer unit; the entire page will be very light or blank. Any toner that does transfer will be due to a “contact” transfer instead of a “charge” transfer. Check the high-voltage power supply contacts to the transfer roller.

Transfer Roller (2nd transfer)

ITU (belt surface)

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Fuse Once the image has been fully transferred to the media, the Transfer Roller helps move the paper into the Fuser area. The Fuser applies heat and pressure to the page to melt the tiny toner particles and bond them permanently to the media.

Service Tips If the fuser rollers are damaged, they can cause toner to be pulled off the page or cause paper jams. Toner that rubs off a printed page can be a sign of a malfunctioning fuser or an improper media setting. Always check the paper type setting before replacing the fuser. A common mistake is to print on heavier media (such as cardstock) with the paper type set to plain paper. When removing paper jams from the fuser, be sure to use the fuser release tabs to relieve the pressure on the page. In addition, never pull un-fused toner through the fuser if you can help it; try to back the jammed page out of the fuser in the opposite direction it was traveling.

Fuser

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Clean/Erase There are two main cleaning processes that take place during the EP Process. One process cleans the ITU Belt and the other cleans the Photoconductors. Transfer Unit Clean Once the image on the ITU Belt is transferred to the media, the Cleaning Blade scrapes any residual toner left on the surface of the Belt. This waste toner is carried by an auger system to the Waste Toner Box. Photoconductor Clean/Erase After each plane of color is transferred to the ITU Belt from the Photoconductors, a Cleaning Blade scrapes the residual toner from the surface of each Photoconductor. This serves to both clean and erase left-over charge from the Photoconductor. This printer does not have erase lamps. Once complete, the Photoconductor surface is prepared to begin the EP cycle once again.

Cleaning Blade (ITU Belt)

Cleaning Blade (Photoconductor)

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EP Process Key Components The next page contains a chart detailing the components and functions of each numbered box in the X548 cross-sectional diagram below.

321 54

11

89

10

12

7

6

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X548 EP Process Key Components Table

Number Component Function

1 Photoconductor Coated with an organic substance that makes the surface light sensitive. Holds the latent image written by the Laser.

2 Developer Roll Images toner on the Photoconductor surface where the latent image is located.

3 Toner Cartridges (4) – Cyan, Magenta, Yellow, Black Act as a reservoir or holding tank for the toner.

4 Charge Roll Negatively charges the Photoconductor surface.

5 Laser

Scans the surface of the Photoconductor with a beam of light and partially discharges the surface. The area that is partially discharged is called a latent image.

6 RIP Board

Creates a bitmap image of the data sent by the computer, determines the laser firing pattern to create the image for each color and coordinates all motors, clutches and sensors.

7 Photoconductor Cleaning Blade Cleans the residual toner on the Photoconductor surface and removes any residual charge.

8 1st Transfer Rolls

Receives a charge from the HVPS which in turn charges the back surface of the ITU Belt at each color station. This causes the toner on the photoconductor to transfer to the surface of the ITU Belt.

9 ITU (Transfer Belt) Receives the print image from the photoconductors.

10 Transfer Roller (2nd Transfer) Receives a charge from the HVPS and transfers the print image on the ITU Belt to the media. It is part of the ITU Assembly.

11 ITU Belt Cleaning Blade Cleans the residual toner on the ITU Belt surface.

12 Fuser Applies heat and pressure to the media and bonds the toner permanently to the page.

Not Pictured

HVPS (High Voltage Power Supply)

Provides charge voltage to components in the EP Process.

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Paper Transport System The X548 printers have a “C” shaped paper path. Paper is fed from the bottom of the printer from the paper tray or manual feed and travels upward through the front cover. All models of the X548 printers come standard with a duplex unit installed. The duplex unit is built into the front cover and Tray 1. The duplex unit uses a “peek-a-boo” method to feed the media into the duplex unit once the first side has been completed. Note: If the printer is in the process of duplexing and a sheet of paper is loaded into the Manual Feeder, a jam will occur. Unlike most printers, the X548 does not have registration rollers due to the short paper path in the printer. Instead, the printer uses an encoder wheel to time the paper entering the EP Process at the right moment. The encoder wheel is located in the middle of the Autocompensator Assembly.

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X548 Paper Transport System Key Components Diagram

21

6

4

912

15

7

3

11 10

14

13

16

5

8

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X548 Paper Transport Key Components Table

Number Component Function

1 Fuser Exit Sensor Detects the presence and passage of media in the fuser.

2 Fuser Exit Rolls Move the media out of the Fuser toward the Paper Redrive Rolls. If duplexing, however, the rollers reverse and feed the media past the Diverter and into the duplex unit.

3 Paper Redrive Rollers Carry the paper underneath the Scanner unit to the Output Bin

4 Bin Full Sensor Detects when the Output Bin reaches its maximum capacity.

5 Output Bin Holds the printed paper

6 RIP Board

Creates a bitmap image of the data sent by the computer, determines the laser firing pattern to create the image for each color and coordinates all motors, clutches and sensors.

7 Tray 1 Present Sensor Detects the presence of Tray 1.

8 Encoder Wheel Times the entrance of the media into the EP Process at the right moment.

9 Paper Pick Roller (Autocompensator Assembly)

Picks paper from the Tray and acts as the registration roller to time the entrance of the media into the EP Process (because of the short paper path). In addition, the pick motor reverses during duplexing and drives the duplex aligner rolls

10 S2 Sensor (Registration Sensor)

When triggered, the speed of the paper is adjusted to accommodate the speed of the transfer belt to ensure the proper registration of the image on the media.

11 S1 Sensor (Duplex Sensor) When triggered, it indicates the presence of the media at the turn around in the tray.

12 Gate Aligner Aligns the media as it exits the duplex area.

13 Transfer Roller (2nd Transfer) Receives a charge from the HVPS and transfers the print image on the ITU Belt to the media. It is part of the ITU Assembly.

14 Duplex Aligner Rolls Move the media through the duplex unit.

15 Fuser Applies heat and pressure to the media and bonds the toner permanently to the page. The Fuser rolls reverse during duplexing to drive the Exit Rolls in reverse.

16 Diverter By use of gravity, the diverter gate closes when the media passes by so a page reversed by the Exit Rollers can enter the duplex unit.

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X548 Print Engine Paper Path

Simplex Paper Path

Duplex Paper Path

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X548 Paper Jam Locations

Error message Jam Area

200 Paper Jam Standard 250-sheet tray and manual feeder (tray 1)

201 Paper Jam Jam under the fuser

202 Paper Jam Jam in the fuser

230 Paper Jam Jam in the duplex

235 Paper Jam Media not supported in the duplex

241 Paper Jam Jam in Tray 1 (Standard Tray)

242 Paper Jam Jam in Tray 2 (650-sheet duo drawer or MP Feeder)

243 Paper Jam Jam in Tray 3 (500-sheet optional Drawer)

250 Paper Jam Jam in the multipurpose feeder

29x Paper Jam Jam in the ADF unit

291.xx Paper Jam Jam in the ADF Exit Unit

242

250

200

235

230

201

202

291 291.xx

243

241

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Operator Panel

X548 Panel Buttons

Callout Item Function

1 Display Views scanning, copying, faxing, and printing options as well as status and error messages

2

Keypad

Enters numbers, letters, or symbols on the display

3

Pause

• Press to cause a two- or three-second dial pause in a fax number. In the Fax To field, a Pause is represented by a comma (,).

• From the home screen, press to redial a fax number. • The button functions only within the Fax menu or with fax functions. When outside of the

Fax menu, fax function, or home screen, pressing causes an error beep.

4

Back

• In the Copy menu, press to delete the right-most digit of the value in the Copy Count. The default value of 1 appears if the entire number is deleted by pressing numerous times.

• In the Fax Destination List, press to delete the right-most digit of a number entered manually. You can also press to delete an entire shortcut entry. Once an entire line is deleted, another press of causes the cursor to move up one line.

• In the E-mail Destination List, press to delete the character to the left of the cursor. If the character is in a shortcut, then the shortcut is deleted.

12

3

4

5

6

7 8910

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5 USB Port (located on the side) Insert a Flash Drive to send data to the printer pr to scan a file to the flash drive

6

Home

Press to return to the home screen

7

Submit

• Press to initiate the current job indicated on the display. • From the home screen, press to start a copy job with the default settings. • If pressed while a job is scanning, the button has no effect.

8 Indicator Light

• OFF – The printer is off • Blinking Green – The printer is warming up, processing data or printing. • Solid Green – The printer is on but idle. • Blinking Red – Operator Panel intervention is needed.

9

Stop

Press to stop all printer activity.

10

Sleep

Press to put the printer into or out of Sleep Mode. While in sleep mode the device will wake if a print jobs is received, the ADF is lifted, keypad buttons are pressed, touch screen is pressed or data is sent to the machine.

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X548 Home Screen Your home screen, icons, and buttons may vary depending on your home screen customization settings, administrative setup, and active embedded solutions.

The following page contains a detailed description of the Home Screen buttons and their functions. See the Lexmark X548 User’s Guide for more information.

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X548 Home Screen Buttons Display item Description

Copy Opens the Copy menus

E-mail Opens the E-mail menus

Fax Opens the Fax menus

Menus Opens the menus. The menus are available only when the printer is in the Ready state.

FTP Opens the File Transfer Protocol (FTP) menus Note: This function must be set up by your system support person. Once it is set up, it appears as a display item.

Status message bar

• Shows the current printer status such as Ready or Busy. Note: Make sure the Ready appears before performing any task.

• Shows printer conditions such as Toner Low • Shows intervention messages and gives instructions so the printer can continue processing.

Status/Supplies Displays a warning or error message whenever the printer requires intervention to continue processing. Touch this button to access the messages screen for more information on the message.

Tips Opens a context-sensitive Help feature within the display touch screens

USB Displays the files on a USB drive.

Bookmarks Allows you to create, organize, and save a set of bookmarks (URL) into a tree view of folders and file links.

Held Jobs Displays all the held jobs

Change Language Launches the Change Keyboard Language pop-up window that allows you to temporarily change the primary language of the keyboard screen Note: After the primary displayed language has been changed and the home screen is not used for a period of time it returns to the default primary language.

Release Held Fax If this button is shown, then there are held faxes with a scheduled hold time previously set. To access the list of held faxes, touch this button.

Search Held Jobs

Searches on any of the following items and returns search results: • User names for held or confidential print jobs • Job names for held jobs, excluding confidential print jobs • Profile names • Bookmark container or job names • USB container or job names for supported extensions only

Lock Device This button appears on the screen when the printer is unlocked and Device Lockout Personal Identification Number (PIN) has been set. Touching this button opens a PIN entry screen. Entering the correct PIN locks the printer control panel (touch screen and hard buttons).

Unlock Device This button appears on the screen when the printer is locked. The printer control panel buttons and shortcuts cannot be used while it appears. Touching this button opens a PIN entry screen. Entering the correct PIN unlocks the printer control panel (touch screen and hard buttons).

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X548 Administrative (Customer) Menu For a complete listing of the printer menu tree, consult the User’s Guide. X548 Administrative (Customer) Menu Tree Supplies Paper Menu Reports Settings Replace Supply Default Source Menu Settings Page General Settings Cyan Cartridge Paper Size/Type Device Statistics Copy Settings Magenta Cartridge Substitute Size Network Setup Page Fax Settings Yellow Cartridge Paper Texture Network [x] Setup Page E-mail Settings Black Cartridge Paper Weight Shortcut List FTP Settings Imaging Kit Paper Loading Fax Job Log Flash Drive Separator Roll and Pick Assembly

Custom Types Fax Call Log Print Settings

Waste Toner Bottle Custom Names Copy Shortcuts Fuser Custom Scan Sizes E-mail Shortcuts Transfer Module Universal Setup Fax Shortcuts FTP Shortcuts Profiles List Print Fonts Print Directory Asset Report Security Network/Ports Help Manage Shortcuts Edit Security Setups Active NIC Print All Guides Fax Shortcuts Miscellaneous Security Settings

Network1 Copy Guide E-mail Shortcuts

Confidential Print Standard USB Menu E-mail Guide FTP Shortcuts Disk Wiping SMTP Setup Fax Guide Copy Shortcuts Security Audit Log Active NIC FTP Guide Profile Shortcuts Set Date and Time Network1 Print Defects Guide Information Guide Supplies Guide Option Card Menu A list of installed DLEs (Download Emulators) appears 2

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X548 Service Menus Several hidden menus exist to configure advanced settings, troubleshoot problems or obtain additional printer information. The settings contained in these menus should not be changed unless it is specifically requested by the Service Manual or technical support. Changing the settings may cause improper operation of the printer. For a complete list of these menus, consult the Service Manual for the printer.

Diagnostics Mode

To enter the Diagnostic Menu, do the following:

1. Turn off the printer.

2. Press and hold 3 and 6.

3. Turn on the printer.

4. Release the buttons when the splash screen appears.

The Diagnostics Menu contains advanced settings and operations used for repair, adjustments or other diagnostic actions.

Configuration Menu

To enter Configuration Menu, do the following:

1. Turn off the printer.

2. Press and hold Right 2 and 6.

3. Turn on the printer.

4. Release the buttons when the splash screen appears.

The Configuration Menu contains a set of menus, settings and operations which are infrequently required by a user. Generally, the options made available in this menu group are used to configure a printer for operation.

SE Menu From a browser, add “/se” to the device IP address.

(for example: http://158.183.3.2/se) Configure or reset advanced Network settings.

Invalid Engine Code

To enter the Invalid Engine Code state, do the following:

1. Turn off the printer.

2. Press and hold Right 3, 4 and 6.

3. Turn on the printer.

4. Release the buttons when the splash screen appears.

This state allows you to POR the printer into a mode that disables the Engine Code and allows the programming of new code into the Engine card. Typically this function is used to reprogram defective Engine code but can be useful in other applications.

Recovery Mode

To enter Recovery Mode, do the following:

1. Turn off the printer.

2. Press and hold 2, 7 and 8.

3. Turn on the printer.

4. Release the buttons when the splash screen appears.

This mode will allow the printer to boot from a secondary set of instructions to allow a code flash to the printer. No other functions are available. The screen will have a red background and say “Recovery”. While in this mode, you can ONLY flash code via USB directly connected to a PC.

Fax SE Menu Enter **411 while in the Home Prime screen. This should be used only under the guidance of higher level support.

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Network SE Menu

1. In the Administration (Customer) Menu, select the Network/Ports Menu.

2. Select Standard Network.

3. Select STD NET SETUP.

4. Once in the Standard

Network Setup page, press 9, 7 and 6 at the same time.

5. Once you press the buttons, you should be in the Network SE Menu.

The Network SE menu contains advanced network menu tools. Warning: Changing the settings within this menu may cause the printer not to function properly.

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Print Quality Diagnostic Tips

General Terminology Before diagnosing print quality problems, take a moment to understand the concepts below. This will prevent confusion when diagnosing or escalating a problem. Know your paper orientation when diagnosing a print quality issue. References to direction such as horizontal and vertical must be made holding the paper in portrait orientation (long edges to the left and right) with the printed side facing you. Don’t hold the paper in landscape orientation. See below.

Know the direction of the print when diagnosing a print quality issue. References to the “Process” or the “Scan” direction refer to the direction in which the paper travels through the printer.

Process is the paper’s direction through the printer that corresponds to the rotation of the photoconductors.

Scan or Scanning is the direction in which the LED or laser writes to the photoconductor and is across the paper path.

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Print Quality Rules of Thumb If you encounter print quality problems, follow the tips below. Following these simple rules may solve the problem easily and quickly.

• Always run a new Settings/Configuration page showing the:

• Page Count – Is it time for a maintenance kit?

• Supply Life – are any of the supplies low or exhausted?

• Firmware/Code Levels – Are the code levels old/obsolete?

• Media Settings – does the printer media settings match what’s in the Trays?

• Always check the Media Type and Size used.

• Is the media used within the printer’s manufacturing specification?

• Are the printer and/or Driver set correctly for the paper type/size?

• Always print the printer’s Self Test pages.

• How does the print vary from what is expected?

• Try reseating the supplies.

• Check for damage as you reseat them.

• For tricky problems, think about the EP Process Steps. Eliminate the components/areas that couldn’t cause the problem until you are finally left with what could.

Starter cartridges cannot be swapped between printers for troubleshooting purposes as it will post an error message.

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Paper Transport Diagnostic Tips

Paper Rules of Thumb Paper jams and feed problems occur for numerous reasons. Sometimes, failure of the equipment is the cause or it can be the result of other external factors. Before replacing parts for a feed problem, ask these questions:

• Is the customer using a supported media type? This is a common problem. Check the printer specifications if you are not sure.

• Is the customer using a supported media size? Check the printer specifications of you are not sure.

• Is the customer using a supported media weight? This is a common problem. Check the printer specifications of you are not sure.

• Have you tried printing with a fresh ream of paper? Paper that is left out of the package for periods of time can dry out or absorb moisture.

• Have you tried printing from a different input source? This will help narrow down the cause of some problems.

• Is too much paper loaded in the Tray? Make sure the stack height does not exceed the indicated maximum height.

• Is the paper in the Tray wrinkled, creased, damp, or curled? Paper will not feed properly if it is damaged. Try a fresh ream of paper.

• Are different media types and/or weights loaded in the Tray? This will cause misfeeds.

• Is the relative humidity too high? Too low? This can affect the media and/or printer and its ability to feed properly. Check the printer specifications to see if it is located in an ambient environment.

• Is the paper loaded properly in the Tray or option? This is a common problem. Reposition the paper in the Tray or option to make sure that is loaded properly. The paper guides should be flush against the media, but not too tight.

• Are the feed rollers worn because it is time for a maintenance kit? Check the page count of the printer to see if it is time for a maintenance kit to be installed.

• Are there any obstructions in the paper path? If paper, staples, paper clips or other items are left in the printer, they can prevent the media from feeding properly.

Save yourself time and effort and always check these external influences before spending time troubleshooting a supposed equipment failure.

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X548 Fax Diagnostic Tips

Fax Rules of Thumb Because a fax is composed of multiple stages, pinpointing the issue can be difficult.

• First, try using the copy function.

• If the copy function prints are normal, the problem is likely in the telephone line or receiving fax – NOT the sending Fax machine.

• Try sending the fax again to see if the telephone line may be the problem.

• If there is no improvement, contact the telephone company.

• If the copy function’s printing tests are abnormal, try printing test pages from the printer and scanner unit separately via a computer.

Fax Send Problems Problems with print quality at the receiving fax, such as corrupt images, lines in the image, top/bottom cut off. If the copy function is normal:

• Cause: Noise in the telephone line or a problem in receiving fax’s printer.

• Corrective action: Determine whether the problem is in the telephone line or at the receiving fax by trying the copy function on the printer at the receiving fax.

Note: If the telephone line condition is degraded, white horizontal lines, missing rows, and/or cut-off top/bottom may occur.

Note: Branch connections or incoming call (call waiting) may also cause image corruption.

If the copy function is faulty:

• Cause: Dirt or a problem in scanner.

• Corrective action: Clean the flatbed glass, or repair the scanner. If the original is being sent from the ADF, try printing a copy with the original placed on the flatbed glass. If this solves the problem, the problem is in the ADF.

• Unable to Dial

• Cause: A bad connection. Incorrect setup of dial type and/or line type.

• Corrective action: Check the connection. Reset the dial type and/or line type to correct settings.

Note: If the telephone line condition is degraded, white horizontal lines, missing rows, and/or cut-off top or bottom may occur.

Note: Branch connections or incoming calls (call waiting) may also cause image corruption.

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Fax Receive Problems Problem with the print quality, such as corrupt images, lines in the image, or the top or bottom is cut off. If the copy function is normal:

• Cause: Degraded telephone line connection caused by noise, etc. or a problem with the sending fax’s scanner.

• Corrective action: Determine whether the problem is in telephone line or at the sending fax by trying the copy function at the sending fax.

Note: If the telephone line condition is degraded, white horizontal lines, missing rows, and/or cut-off top/bottom may occur. Branch connections or an incoming call (call waiting) may also cause image corruption.

If the copy function is faulty:

• Cause: Dirt or a problem in the printer.

• Corrective action: Clean all the parts of printer, or repair the printer.

• Does not emit the response signal

• Cause: Bad connection. Incorrect setup of the dial type, line type, and/or reception mode.

• Corrective action: Check the connection. Reset the dial type, line type, and/or receive mode to the correct settings.

Note: If a call is made to the fax from a telephone, and the fax does not emit its ringing sound, a telephone line problem is highly probable.

Other problems Branch connection (parallel connection)

• During fax reception, if the handset of another telephone on a branch connection is lifted, the received image may be corrupted or a transmission error may occur.

• Branch connections may also interfere with caller identification, call waiting, and the receiving operation of connected telephones.

Call waiting

• If a call comes in during fax sending or reception, the image may be corrupted.

DSL (Digital Subscriber Line)

• DSL uses existing telephone lines to deliver high speed transmission. Because the line is used for voice and data transmission, various problems may occur.

• Problems such as noise during spoken conversation, low sound volume, and misdialing are possible.

• Replacing the splitter (line filter) may improve the problem.

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Electrical noise

• If electronic equipment (televisions, computers, microwaves, etc.) or devices equipped with motors are located near a fax, the noise generated from the equipment may degrade the line condition.

• A telephone line can act as an antenna and may absorb electric waves generated from wireless or broadcasting equipment.

• Because fax data is audio data, the line quality affects the quality of the image data.

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Complex Parts and Procedures Parts listed in this section are complex for various reasons and are tagged with one or more of the following icons to explain its complexity:

• High degree of technical difficulty in removing/replacing the part.

• Complex/lengthy instructions.

• Special procedures required before, during or after part installation.

• Increased likelihood of servicer error resulting in additional problems, malfunction of the machine or damage.

The instructions for removal, installation and/or special adjustments can be found in the X548 Service Manual. Follow the instructions carefully to avoid additional errors, malfunction or breakage. For your awareness, the most complex parts include the ones listed below. When removing, replacing or reinstalling these parts, follow the instructions carefully!

Part Complexity

Flatbed Scanner Assembly

ADF Unit Assembly

Top Cover

RIP Board

Operator Panel

Printhead

ITU

HVPS

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Flatbed Scanner Assembly When the flatbed is replaced, perform the following adjustments:

• Scanner Calibration – in Diagnostic mode, navigate to Scanner Calibration and perform the Copy Quick Test, Adjust Calibration Values and Reset Flatbed, ADF Front, ADF Back Calibration Values.

• Scanner Manual Registration – located in the Configuration Menu; manually registers the flatbed and ADF on the MFP’s scanner unit.

ADF Assembly When the ADF is replaced, perform the following adjustments:

• Scanner Calibration – in Diagnostic mode, navigate to Scanner Calibration and perform the Copy Quick Test, Adjust Calibration Values and Reset Flatbed, ADF Front, ADF Back Calibration Values.

• Scanner Manual Registration – located in the Configuration Menu; manually registers the flatbed and ADF on the MFP’s scanner unit.

Top Cover The instructions for removing and installing the top cover are lengthy. In addition, you need to make sure the drive belt is attached to the fuser gear and the tension spring is properly attached to the top cover.

RIP Board This part contains Mirrored NVRAM, so it should never be replaced at the same time as other Mirrored NVRAM components. See the Mirrored NVRAM Components section in this guide for complete details and exceptions. The following adjustments need to be performed after this board is replaced: 1) Scanner Manual Registration and 2) Motor Detect. In addition, the RIP Board contains the default and custom eSF applications and settings. These are NOT contained in the NVRAM or on a hard drive, therefore, a RIP Board failure could result in loss of these applications and their settings if they are not backed up. When a new RIP Board is installed, the Lexmark default eSF applications and settings are loaded. The best practice is for an administrator to have their eSF applications and settings backed up prior to encountering a problem. In case this hasn’t been done, an attempt to back up the data should be performed before replacing the RIP Board. See the following page for instructions on how to back up the eSF applications and settings.

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To back up the eSF applications and settings, do the following:

1. Turn off the printer.

2. Press and hold 3, 4 and 6.

3. Turn on the printer.

4. Release the buttons when the splash screen appears.

5. Access the printer's Web Page from a web browser.

6. Click on Settings

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7. Click on Solutions (don’t click Import/Export – the explanation is at the end)

8. Click on Embedded Solutions

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9. Select each application individually by clicking on the name (we’ll use Forms and Favorites in this example)

10. Click on Export to create a file of that application’s settings

11. If the Web page cannot be accessed, or an error persists despite trying to boot in Invalid Engine code mode, then there is no way to backup the eSF apps. Make the customer aware of this.

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12. Don’t Use the “Global” Import/Export method to back up the eSF applications and settings. There is a size limit of 128kb on the export file.

13. Customers with a large number of applications or settings may exceed the file size limit and have information truncated in the exported file.

14. Once the new RIP Board is installed, follow the same steps as above, however, you will Import

(instead of export) the <filename>.UCF file for each application.

Operator Panel This part contains Mirrored NVRAM, so it should never be replaced at the same time as other Mirrored NVRAM components. See the Mirrored NVRAM Components section in this guide for complete details and exceptions.

Printhead After the printhead is replaced, the Registration (black planes) and Alignment (color planes) must be completed to align the new printhead. Failure to properly align the printhead may result in plan-to-plane mis-registration and print quality problems.

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ITU When a new ITU is installed, it must be configured in the Diagnostic Menu. Each ITU has a barcode that contains 16 digits. Before installing the new ITU, write down the number associated with the bar code. Once installation is complete, go to Printer Setup in the Diagnostic Menu and select ITU Barcode to enter the number. See the Service Manual chapter Diagnostic Aids for the steps to perform this procedure.

HVPS Because of the design of the HVPS and its cage, it is at increased risk of becoming damaged during installation. The design of the HVPS changed slightly from the original production models of the X54x printers. To eliminate the screw which required a long-shank screwdriver to access, a spring-loaded mechanism was added in the rear of the cage. When installing the HVPS, the board needs to be flexed slightly to position it on the mechanism correctly. To make matters worse, the opening in which the HVPS installs has several obstacles: 4 screw tips and a plastic pin. Because of these factors, there is a high risk of the board scraping on the screw tips or plastic pin and damaging the board. If damage occurs, the resulting print quality problem will be different depending on where the damage occurred. Due to the location of the obstacles in the opening where the board installs, the yellow plane is at most risk of being affected. Below is a close-up picture of a damaged HVPS from a training class. A small capacitor was knocked off the underside of the board on installation. The capacitor is very small and could not be seen easily until magnified. See picture below.

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The damage to the HVPS created a short on the board which in turn damaged the Imaging Basket (the developers were not damaged). This resulted in a light to nearly absent yellow plane and stripes of missing color on the cyan and magenta. The black plane seems unaffected. See picture below.

If the HVPS is damaged on installation, both the HVPS and a new imaging basket will need to be installed.

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Mirrored NVRAM Components RIP Board Operator Panel X548 NVRAM Components:

• RIP Board

• Operator Panel

Warning! Observe all ESD precautions while handling electronic parts.

Warning! When replacing any one of the NVRAM components:

• Only replace ONE component at a time – NEVER replace both at once.

• Perform a POR before replacing the second component. If this procedure is not followed, the printer will be rendered inoperable.

• These components mirror the critical NVRAM settings for the printer. If you have not already done so, complete the online course Mirrored NVRAM from Lexmark’s online learning site.

Warning! If you must use one the components listed above as a method of troubleshooting, boot the

printer into Diagnostic mode only. This will prevent the NVRAM from copying to the new component. If the printer is allowed to boot normally, however, the NVRAM will copy to the new component and it cannot be used in another printer. It must be returned to the manufacturer.

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Cleaning the MFP Document Glass It is important to clean the MFP on a regular basis to keep it functioning properly (about once a month depending on usage). You should also clean the scanner glass if you encounter print quality problems such as streaks on copied or scanned images. Note: Clean both areas of the scanner glass and both white underside areas.

Warning! Always turn the printer OFF and unplug it before cleaning.

• Slightly dampen a soft, lint-free cloth or paper towel with water. Do not use any kind of cleaning agent to clean the glass.

• Do not spray liquid on the glass.

• Wipe the scanner glass until it is clean and dry.

• Wipe the white underside of the scanner cover until it is clean and dry.

3

4 2

1

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Updating Printer/Scanner Code You can update Engine, RIP or Scanner code on the printer by using the USB Direct Port on the front of the machine.

The Printer must be at READY to flash the code. You cannot update code from Invalid Engine Code Mode using the USB Direct Port.

Warning! Before flashing code on a printer, consult technical support for the proper code. Flashing the wrong code could cause the printer to malfunction or render it inoperable. To Flash code, do the following:

• Insert a recommended USB Flash Drive into the USB Direct Port that contains the code you want to flash.

• The Operator Panel will automatically display the contents of the Flash Drive when it’s inserted.

• Select a folder to view its contents or select a file to start the flash process.

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• Choose Update Code to flash the code to the printer.

• DO NOT power the machine off. Follow any messages that may appear on the display.

• When the flash process is complete, the printer will reboot automatically and come to READY.

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Circuit Board Location

RIP Board

Low Voltage Power Supply (LVPS)

Toner Meter Cycle Card

High Voltage Power Supply (HVPS)