D067/D072/D068/D069 Service Training
Transcript of D067/D072/D068/D069 Service Training
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1Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 1
D067/D072/D068/D069Service Training
Product OverviewS-C4
New slide about added features (slide #5) added 2009/01/20
Repaired broken links on "Fax Unit - Overview" and "FCU Board" slides. -December 2nd, 2008
New slides (#11, #12, & #13) added 2008/12/02
New slide (#8) added 2008/12/01
Final Version uploaded on November 28th, 2008
Presentation edited/compiled by:Ron [email protected]
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2Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 2
Machine Appearance
Standard TrayExit Tray
Auto-ReverseDocument Feeder
(ARDF)
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3Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 3
Machine Appearance (Rear)
FaxTel & Line
LANPowerSwitch
USB 2.0SD Slot(D467)
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4Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 4
Operation Panel
FAX functions on left side of panel above are standard on D068 and D069 models.
Printer/Scanner Option (D468) can be optionally added to other models.
Note that unlabeled section on left is labeled with relevant language for region in which machine is to be used.
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5Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 5
New for this Model
Major technical enhancementsIncreased copy speed
» 16 to 17 cpm (printing from memory)New design element
» Blue output trayNew options
» Accessibility Handle (for paper tray)» Scan to SD/USB» VM card» HDD
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6Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 6
Who Will Use This ModelSmall office users (3-10 people) or individuals (as a personal business machine).
Mid to large sized offices (10-50 people) as a work group division printer/scanner.
Mid to large sized offices as a business personal machine.
This machine has these benefits:Compact sizeQuick warm up time Color scan to E-mail featureStandard duplex printing (both scan and print)Copier/printer/color scanner
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7Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 7
Machine Configuration - 1/3
(Basic: D067/D072)
ARDF (B872)Standard on D072/D068/D069Optional on D067
500-Sheet Paper Tray Unit (B421)
Two may be used together.Note that - when using two B421 units - a tray heater may only be installed on upper of two units (nearest the main machine).
B421500-SheetPaper Tray Unit
Main Machine(D072/D067)
ARDF(B872)
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8Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 8
Machine Configuration - 2/3 (F/SPF: D068/D097 - 1/2)
Handset(B433)
Fax Unit
GW Controller Board
ARDF(B872)
Main Machine(D068/D069)
B421500-SheetPaper Tray Unit
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9Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 9
Machine Configuration - 3/3 (F/SPF: D068/D097 - 2/2)
EGB
RAM
FCU
MBUMBU
FCU
HDD
Slot-1
Slot-2
MBU - Memory Board Unit / FCU - Fax Control Unit / EGB - Main Engine Board
HDD - Hard Disk Drive / RAM - Random Access Memory
Be sure to remove all thirteen cover screws to access the EGB, MBU, FCU, & RAM boards.
Ethernet
USB-B
USB-A
Optional HDDConnection
Line
Tel
I/F Slot(covered)
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10Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 10
System Components (for D068/D069)
[A]: One of following:HDD Encryption Unit (D377)PostScript3 (D468)Data Overwrite Security Unit (D362)
[B] VM Card (D467)Firmware updatesAddress book
[C]: One of following:IEEE 1234 (B679)Wireless LAN (M344)Gigabit Ethernet Board (G874)RR
USB 2.0SD Slot
(D467-03)
RAM DIMMMemory(G332)
HDD (D467-04)
[A]Slot-1
[C]
[B]Slot-2
RAM DIMM memory distributed with the printer.
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11Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 11
Controller Board Access (D468 - for D068/D069)Open right door.
Remove:Rear coverScanner upper left cover
See FSM for more details RightDoor
Scanner UpperLeft Cover
RearCover
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12Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 12
Optional HDD - 1/3 (for D068/D069)
To install the HDD Unit (Hard Disk Drive), first remove the rear cover of the machine, and then the GW Controller Box cover (thirteen screws).
GW Controller Box
RightDoor
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13Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 13
Optional HDD - 2/3 (for D068/D069)
Note: Before plugging in the optional HDD unit, the screw indicated at left must first be removed.
After removing the indicated screw, plug in the HDD unit and then reattach the screw (which holds the HDD unit against the Main Engine Board), as well as the other two HDD screws (see next slide).
GW Controller Box(Cover Removed)
HDD Screw
Optional HDDConnection
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14Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 14
Optional HDD - 3/3 (for D068/D069)
When attaching the two HDD Unit screws from the end of the GW controller box, attach the screw into the smaller hole first, and the larger hole secondly.
This allows for adjustment and easier attachment.
Larger Hole
Smaller Hole1st
2nd
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15Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 15
D067/D072/D068/D069Service Training
Specifications
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16Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 16
General SpecificationsConfiguration: Desktop
Copy Process: Laser scanning & electrophotographic printing
Copy speed: 17 ppmA4 / 8 ½" x 11"; 100% (printing from memory)
Warm up: (basic) 10 seconds / (other) approx. 30 seconds
First copy time: 7.5 seconds or less
Copy paper capacity:Paper tray: 250 sheetsOptional paper tray: 500 sheets x 2Bypass: 100 sheets
Toner Yield: 7,000 copies per toner bottle
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17Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 17
More Specifications
For a more detailed description of machine’s specifications, refer to specifications section of FSM (Field Service Manual), noting in particular the following:
Copy paper sizeCopy paper weightPower consumption and machine dimensionsCopy paper capacityOriginal paper sizePaper feed
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18Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 18
Machine Configuration - 1/2There are four machines in this series - D067, D072, D068, & D069. Machine configuration varies depending on version.
Examine four machine configurations in specifications section of FSM for more details, briefly:
D067 - BasicD072 - With ARDF (Basic + DF)D068 - Fax Model (F)D069 - Printer/Scanner and Fax Model (SPF)
Other connectivity options are also available (depending on machine version).
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19Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 19
Machine Configuration - 2/2D468-00/01 - Printer/Scanner Unit, Type 171
D468-04/05/06 - PostScript-3 Unit, Type 171
B872 - ARDF
B421 - Paper Tray Unit
D467-03 - USB-2.0/SD Slot - Type B (only for D069)
D467-04 - HDD Option, Type 171
D377-16 - HDD Encryption Unit, Type A
D362-11 - Data Overwrite Security Unit, Type 1
B446-83 - PCU (Photo Conductor Unit), Type 1515
D461 - Accessibility Handle, Type C
G874-01 - 1000 base-T
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20Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 20
D067/D072/D068/D069Service Training
Installation
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21Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 21
Before You StartRead Installation chapter of FSM before installing machine, noting:
Environment (ventilation, temperature range, etc.)Space and power requirements. Accessory check (for model you will install).
Before installing optional units, be sure to:Switch machine off and remove power cord and network cable.
Keep system parameter report. You will need it for any future troubleshooting of machine.
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22Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 22
InstallationInstall machine. See "Installation" of FSM.
Install optional paper tray unit and optional paper tray unit heater.
Be sure to keep in mind the following when you install machine and paper tray unit:
You do not need to pull toner bottle holder completely out of machine.Do not remove inner cap of toner bottle.Do not use force to turn toner bottle after you have set it in toner bottle holder. Machine will turn bottle. Remove all tape from machine.
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23Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 23
Service Program ModeStandard maintenance work requires utilization of SP modes. There are two kinds of SP modes for this machine:
SP Mode (Service Program mode)SSP Mode (Special Service Program mode)
» SP & SSP modes are for service technician only. Do not let users access SP & SSP modes.
Read the Service Program section of FSM. Then try entering some of the SP and SSP modes (after you have finished installing the machine).
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24Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 24
D067/D072/D068/D069Service Training
Machine Overview and Machine Operation
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25Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 25
Component Layout
For more details on component parts, see the FSM (Field Service Manual).
Exposure Lamp
CCD (on SBU)
Lens Block
1st Scanner
2nd Scanner
Toner Supply Bottle
Laser Unit
Bypass PaperFeed RollerPolygon Mirror Motor
Scanner Motor
Pressure Roller
OPC Drum
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26Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 26
Paper PathPaper Path
Paper path is indicated with heavy black lines and arrows.ARDF is optional on some modelsFor a full listing of all major components used in paper path, see full component list in FSM.
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27Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 27
Drive Layout
Paper Feed Clutch
Main Motor
Toner Bottle Clutch
Exit Roller
Duplex Motor
Scanner Motor
Drive LayoutThe slide shows some of the drive components. For more details and information, refer to the FSM.
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28Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 28
Block Diagram
For additional details, refer to the FSM (Field Service Manual)
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29Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 29
Block Diagram (for GW Controller)
For additional details, refer to the FSM.
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30Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 30
NVRAM Upload/DownloadThis section depends on which model you have. There are two different procedures.
SP5-824-1 (NVRAM Upload) - From the BICU to a flash memory cardSP5-825-1 (NVRAM Download) - From a flash memory card to the BICU
Practice as outlined in NVRAM Data Upload/Download (SP5-824/825) section of Service Tables.
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31Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 31
Adjusting Copy Image
Adjust copy image area at these times:After clearing engine data (SP-5801-2).If you replace any of these: First scanner or second scanner, lens block, scanner motor, polygon mirror motor, paper tray.
Do adjustments as outlined in "Adjusting Copy Image Area" in the Replacement and Adjustment section of FSM
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32Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 32
Operating Instructions
While these are user operations, service technicians should also be generally familiar with them.
Read these if you’re not already familiar with them:User Tools: General settingsPlacing originals and copying
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33Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 33
D067/D072/D068/D069Service Training
Scanning and Image Processing
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34Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 34
Scanning - Overview
Scanner MotorThird MirrorCCD
Second MirrorSecond ScannerFirst ScannerFirst Mirror
Lens
HP sensor makes sure scanner is at home position.
To copy, original is illuminated by xenon exposure lamp. Then 1st, 2nd, and 3rd mirrors move reflected light to lens block. After this, lens transmits it to CCD.
1st scanner has a reflector. This helps to not let shadows get on pasted originals.
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35Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 35
When scanning in book mode, 2nd scanner moves at half speed of 1st scanner. (Scanner speed is faster for reduction printing, and slower for enlargement printing.)
Magnification can be adjusted in sub-scan direction.
Scanner Drive
Scanner Drive
SecondScanner
Timing BeltShaft
Timing Belt
First Scanner
Pulley
First scanner is attached to timing belts, which drive 2nd scanner with 2nd scanner's pulleys.
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36Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 36
Image Processing - Overview
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37Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 37
Image Processing - OverviewChanging Modes:
You cannot switch modes at these times:» When accessing user tools.» When scanning an original
Practice switching modes and getting multi-access. (Refer to Operating Instructions, General Settings Guide)
To learn more about image processing, refer to the Core Technology Manual
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38Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 38
D067/D072/D068/D069Service Training
Laser Exposure and PCU
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39Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 39
Laser Unit Overview
LD Unit
LD Shutter
Synchronization Detector Lens
LD unit controls laser output and synchronization.
The LD shutter blocks laser-beam path if toner bottle holder is unlatched.
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40Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 40
LD Safety Switches
PSU
BICU
LD Drive Board
+5VE
GND
+24V
REG
LDPD
Vcc
LD
PD
M61880FP
+5VS
+5VS
Front/Right DoorSwitches
Safety switches are installed at front and right doors. Machine will cut power to LD drive board if either door is opened. Corresponding switch cuts power supply (+5VS) to laser diode.
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41Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 41
Photoconductor Unit (PCU) -Overview
Mixing Auger 1
Doctor Blade
Charge Roller
Cleaning Roller
Mixing Auger 2
DevelopmentRoller
OPC Drum
TonerCollection
Coil
TD Sensor
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42Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 42
Drum DriveMainMotor
Drum Drive Shaft
Drum Main motor drives the drum through a series of gears and the drum drive shaft.
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43Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 43
Drum ChargeHigh VoltageSupply Board
Spring
Drum Charge Roller
Wire
OPC drum is charged via a contact charge roller. Drum charge roller stays in contact with drum, giving a charge of –900 V on drum surface.
High voltage supply board gives a negative charge to charge roller with a wire and spring.
Default base charge is –1650V. This can be adjusted with SP 2001 1.
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44Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 44
Charge Roller Voltage Correction
ID Sensor Pattern
t
Drum Potential
Development Bias
ID Sensor Output
Charge Voltage
Laser DiodeOn
Off
Sub-scan Direction
–900 V
–600 V–400 V–140 VVsg (2.64 V)Vsdp (2.44 V)
Vsp (0.35 V)
–1650 V–1400 V
+1.5 cm
4.0 cm
2 cm
DevelopmentBias Pattern
ID SensorPattern
Voltage transfer from charge roller to drum decreases as ambient temperature and humidity increase. Machine checks charge transfer, and adjusts charge roller voltage when required.
Checks are done on initial warm-up. If machine is set to low-power or auto-off mode for more than 4 hours, a check will be done when machine wakes up.
Procedure:Right after the machine creates the ID sensor pattern for toner density control, the development bias pattern is created.The development bias is decreased to –400 V. The ID sensor measures the development bias pattern’s density (Vsdp) and the bare drum’s voltage (Vsg). The FCU compares the results and adjusts the roller voltage accordingly.
Vdsp/Vsg > 0.95: Decreases the negative charge on the charge roller by +50 V.Vdsp/Vsg < 0.90: Increases the negative charge on the charge roller by –50 V.
Use SP 2221 to see the current ID sensor values.
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45Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 45
Charge Roller Cleaning
Cleaning Roller
A cleaning roller cleans charge roller. You do not need to replace or clean this roller.
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46Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 46
New PCU Detection
Plate
PCU Gear
Shipped State
Machine automatically detects a new PCU at these times:
At time of copier installationWhen a replacement PCU is installed
A new PCU must be initialized before it can be used. The following also must be done:
Agitate toner/developer mix. Initialize TD sensor. Initialize PCU counter.
- The machine automatically detects a new PCU and performs initialization. In the shipped state, the connection plates are pressed together and make a complete circuit. This tells the CPU that the PCU is new and must be initialized. When the PCU gear rotates, the top connection plate gets free and breaks the circuit. - Pre-installed PCUs do not use this mechanism. A factory-set flag tells a new machine
to initialize the PCU when the machine is switched on for the first time.
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47Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 47
D067/D072/D068/D069Service Training
Development
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48Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 48
DevelopmentOverview
TD Sensor
Mixing Auger 1
Mixing Auger 2
Development Roller
Two mixing augers mix the developer (carrier/toner mix).
TD (toner density) sensor and the ID (image density) sensor (shown in a red circle) are used to control copy image density.
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49Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 49
Development BiasHigh Voltage Supply Board
Development Roller
Toner gets to areas with smallest negative charge. Drum has a large negative charge (-900V). Latent image on drum has a small negative charge (-140 ±50V).
High voltage supply board gives a –600 V bias to development roller. This sends toner from development roller to latent image.
Development bias can be adjusted with SP 2201 1
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50Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 50
Toner Supply
TonerCollection
CoilSlit
Development Unit
Chute
Toner path is same for all models. There are two sources of toner: new toner and recycled toner.
A shutter is pushed open by PCU body when a toner bottle is set in machine. Toner bottle cap is held with a chuck. Cap comes off when lever is pushed.
Spiral grooves move toner out of bottle. Mylar blades (circled in red) move toner through a slit into development unit. This happens when clutch turns toner bottle.
Toner collection coil recycles toner it gets from OPC drum. Recycled toner moves down chute and goes into development unit through a slit.
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51Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 51
Toner Bottle
Shutter
Lever
Toner bottle is same for all models.
Toner shutter opens when toner bottle is set into machine.
Bottle cap opens when lever is pressed.
Spiral grooves move toner out when bottle rotates.
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52Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 52
Toner Density ControlToner concentration in developer is controlled with these values:
Vts: TD sensor initial set of 1.25V. (Used as reference voltage when Vref is not available).Vref: Toner supply reference voltage (calculated value; periodically updated).Vt: Actual output from TD sensor.Vsg/Vsp: Values from ID sensor, where Vsp is voltage of a test pattern ("ID sensor pattern"), and Vsg is voltage of bare drum.
Toner is given to development unit if Vt is more than reference voltage
Toner Density ControlReference Voltage
Vts is used as the reference if the PCU has just been installed, or if ID sensor correction is set “off” with SP 2927. Vref is used as the reference at all other times.
Toner Density Sensor Initial SettingThe Vts for this machine is 1.25 V. The machine adjusts the sensor so that it reads out 1.25V for TD sensor initialization when a new PCU is installed.
Toner Concentration MeasurementThe machine checks concentration every copy cycle, comparing Vt against the reference voltage to do this.
Vsp/Vsg DetectionAn ID sensor pattern is made on the drum by the charge roller and laser diode. The ID sensor detects the pattern density (Vsp) and the density of the bare drum (Vsg). Detection is done at the same time as (and immediately before) charge-roller voltage detection. You can set ID sensor control “off” with SP 2927.
Calculation of VrefVref is calculated based on the ID sensor output (Vsp/Vsg) and the present reference voltage (Vref or Vts) – Vt.
Toner Supply DeterminationThe machine gives toner if Vt gets to more than the reference voltage. You can see current Vt and reference voltage values with SP 2220. You can see other ID sensor values with SP 2221.
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53Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 53
Toner ErrorsSensor errors occur at these times:ID Sensor:
Vsg ≤ 2.5 (when Vsg is read)Vsg < 3.5 (at maximum power)Vsp ≥ 2.5Vt ≥ 2.64 or Vt < 0.20
You can see current readings with SP 2221TD Sensor
TD < 0.20 V TD > 2.64 V
If machine gets error readings 10 times in succession, SC 390 will be shown. You can see current value with SP 2220
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54Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 54
Toner Near End/End DetectionMachine will show toner near end at these times:
Vt is at Level-6 five times in succession.Vt > 1.85 five times in succession.
Machine will show toner end at these times:VT is >= Level-6 or VT> 1.85 n times in a row.VT is at Level-7 or VT> 2.00 three times in a row
Toner Near End/End Detection•n is the number of sheets that can be printed before toner near end gets to toner end. n is set to 50 by default. •You can change the value of n to 20 with SP 2213.
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55Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 55
Drum Cleaning &Toner Recycling
TonerCollection
Coil
MixingAuger 1
Slit
CleaningBlade
Cleaning blade gets leftover toner from drum after an image transfer. Then toner piles on blade.
Toner collect coil moves toner from pile and puts it onto chute. Then toner moves to development unit through a slit.
Drum turns about 3 mm in reverse at end of each copy job. This moves toner away from cleaning blade.
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56Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 56
SP ModesSP 2214: Developer initialization.
SP 2802: Forced developer churning.
SP 2908: Forced toner supply.
SP 2921: Toner supply mode.
SP 2926: Standard Vt.
SP 2928: Toner end clear
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57Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 57
Replacement and AdjustmentDo this removal procedure:
See “Toner Supply Clutch” in the FSM
Preventive Maintenance.You must clean toner bottle holder after you replace the PCU.
Learn more:
Core Technology ManualDevelopment processDevelopment biasToner supply
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58Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 58
D067/D072/D068/D069Service Training
Paper Feed
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59Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 59
Paper Feed - Overview
Paper Feed Roller
Exit Roller
See the FSM for a more complete list of components.
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60Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 60
Drive Mechanism - From Paper Tray
RegistrationClutch
Paper Feed Clutch
Paper Feed Roller
Main Motor
Registration Roller
Main motor drives gears on registration clutch and paper feed clutch. These clutches transmit motion to registration roller and paper feed roller.
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61Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 61
Drive Mechanism - Bypass Tray
Bypass Feed Roller
Bypass Feed Clutch
Registration Clutch
Main Motor
Main motor drives gears of registration clutch and bypass feed clutch. Bypass feed clutch moves bypass feed roller.
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62Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 62
Paper Feed And Separation
Machine uses a friction-pad feed system, with friction pad located inside paper tray.
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63Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 63
Paper Lift Mechanism
Projection BLatch Spring
Spring
Rounded Slider
Latch
Protrusion on frame pushes rounded slider in against spring when tray is closed (by sliding it into machine). This retracts latch, allowing spring to push plate up.
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64Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 64
Paper End Detection-Main Tray
Paper End Sensor
Feeler goes into cutout when paper runs out, activating paper end sensor.
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65Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 65
Paper End Detection - Bypass TrayFeelerPaper End Sensor
Feeler goes into cutout when paper runs out, activating paper end sensor.
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66Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 66
Paper Registration
Registration Sensor
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67Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 67
D067/D072/D068/D069Service Training
Image Transfer And Paper Separation
Image Transfer and Paper SeparationImage transfer and paper separation will be covered.
In this section you will do these things:Examine how paper is fed through the machine.Examine transfer current.
When you finish this section, you should know the answers to these questions:How is paper fed through the machine?How is the transfer roller cleaned?
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68Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 68
Overview
TransferRoller
DischargePlate
OPC Drum
OverviewTransfer roller is pressed against OPC drum. High-power supply board gives a positive charge to transfer roller, which causes toner to be transferred from drum to paper.
Machine uses following two paper separation techniques:
» Drum’s curvature helps separate paper.
» Discharge plate removes paper’s charge.
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69Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 69
Transfer Current TimingMachine has two transfer current levels: Low and High.
Low level: High voltage supply board supplies 10µA to transfer roller before image transfer starts. This prevents transfer roller from getting positively charged toner on drum surface.High level: High voltage supply board supplies high level of current to transfer roller at time of image transfer. This allows transfer roller to move toner to paper.High voltage supply board does not supply current when trailing edge of paper has passed transfer roller. High voltage supply board supplies low level current if machine prints more pages.
Transfer Current TimingTransfer current level can be adjusted with SP 2301.Examine default current settings. If transfer current level is not adjusted correctly, the following may happen:
» Parts of page being printed may have ghost images.» OPC drum could be damaged.
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70Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 70
Transfer Roller CleaningToner can get onto transfer roller at these times:
If you print on paper that is smaller than image size During paper jams.
You must clean roller so toner will not get onto back of other prints.High voltage supply unit gives a negative charge to transfer roller. Toner with negative charge moves back to drum. Then high voltage unit provides a positive current. Toner with a positive charge moves back to drum.Roller is cleaned at these times:
When power is switched on.After you clear a paper jam.At the end of a job, if at least 10 print jobs have been made since last clean cycle.
You can change current for cleaning procedure with SP 2301-4.
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71Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 71
D067/D072/D068/D069Service Training
Fusing and Paper Exit
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72Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 72
Overview
Paper Path Sensor
Pressure Roller
Pressure Spring
Hot Roller
Fusing Lamp
Exit Roller
This slide shows some of components for fusing unit. For more details, see FSM.
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73Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 73
Hot Roller Drive
Paper Exit RollerHot Roller
Main Motor
Contact Release Gear
Contact ReleaseSolenoid
See Notes below for details.
Hot Roller Drive MechanismThe main motor drives the hot roller through a gear train. One of the gears in the gear train is the contact-release gear. This gear is linked to the contact-release solenoid. When the contact-release solenoid is activated, it separates the contact-release gear from another gear in the gear train. Drive power of the main motor is not transmitted to the hot roller.Drive power of the main motor is not transmitted to the paper exit roller. This roller is driven by the exit motor.
Contact/Release ControlThe contact-release solenoid comes on at these times:
When the copier warms the hot roller.When the hot roller temperature is 18°C or higher.Fusing idling (SP 1103 1) is set to "No."
Control is based on these:The copier takes a shorter time to heat the hot roller when the roller isn’t turning.The temperature of the hot roller surface may get uneven when the hot roller temperature is low and the roller does not turn.
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74Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 74
Pressure Roller
Pressure Roller
Hot Roller
Pressure Spring
Pressure Roller Pressure springs constantly press pressure roller against hot roller. Springs can be set in two different positions. Default is set in high-pressure (lower position) position.You can move springs to low-pressure (upper position) position if you want to lower the pressure.
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75Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 75
Pressure Release
Right Door
Pressure Release Lever
Pressure ReleaseWhen right door opens,(on each side) it pulls open door catch (on each side). This releases pressure on pressure roller, allowing pressure roller to turn freely, assisting in removal of jams. When right door closes, pressure release lever pushes door catch closed. This allows normal pressure to return.
DoorCatch
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76Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 76
Separation
SeparationHot roller stripper pawls (three) prevent paper from staying on hot roller.
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77Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 77
Thermistor
Center Thermostat
End Thermostat
Fusing Temperature ControlTemperature Control
BICU checks signal from thermistor every 1.5 seconds.
BICU controls fusing lamp depending on following conditions:
» Current temperature» Previous temperature (1.5 seconds before)» Target fusing temperature
Target fusing temperature starts at 180ºC and then goes to 170ºC after one minute.
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78Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 78
Overheat ProtectionBICU checks fusing temperature through thermistor. Copier has five features to safeguard machine from overheating.
Feature 1BICU switches fusing lamp off when fusing temperature gets too high.
Feature 2BICU (Base engine & Image Control Unit) stops machine when thermistor detects an abnormal condition. Then machine will show one of these SC codes:
» SC 543, SC 544, SC 545, SC 546
Feature 3BICU stops machine if thermistor does not work correctly, and then shows SC 541
Feature 4Thermostat near center cuts power to fusing lamp at 160ºC. Thermo-switch near end cuts power to fusing lamp at 170ºC. These thermo-switches are on same circuit as fusing lamp.
Feature 5BICU stops machine if exhaust fan does not work correctly. Then machine shows SC 590. A defective exhaust fan could cause machine to overheat.
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79Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 79
Energy Saver ModesAll models have these energy saver modes:
Low power modeNight/off mode
All models exit energy saver mode at these times:When power switch is switched on.When originals are set on document feeder.When platen cover is opened.
TimersEngine controller activates energy saver when in low power mode. (Timers are user-settable.) Energy saver timer and auto off timer start at same time when machine ends all jobs, or when user ends all manual operations.
» Auto off timer does not wait for energy saver timer.
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80Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 80
Replacement and AdjustmentsDo these removal procedures: (Reference fusing unit in FSM)
Fusing unit.Exit sensor.Hot roller stripper pawls.Hot roller and fusing lamp. Thermoswitch and thermistor.Pressure roller.Nip band adjustment.Contact release solenoid.
All parts for fusing unit have same PM intervals. You must replace or clean these components at PM 90 K.
Replacement and AdjustmentsAll parts for the fusing unit have the same PM intervals. You must replace or clean these components at PM 90 K.
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81Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 81
D067/D072/D068/D069Service Training
Duplex Unit
Duplex UnitThe duplex unit will be covered.
In this section you will do these things:Examine the duplex print procedure.Examine the adjustments for the duplex unit.Learn the SP modes used in the duplex unit.
When you finish this section, you should know the answers to these questions:How is duplex printing done with this machine?What do I need to replace or adjust in the duplex unit?
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82Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 82
Exit Roller
Mechanical LayoutPaperPath
Sensor
Duplex Roller
Fusing UnitMechanical Layout
Exit motor drives exit roller and duplex roller.One of the paper guides on fusing unit is linked to duplex timing sensor.Bypass tray cannot be used for duplex printing.
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83Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 83
Duplex Printing ProcessRead about duplex printing process in Duplex Unit of FSM.
Examine function of following in duplex print process:
Main motor and exit motorHot roller and pressure rollerDuplex timing sensorExit rollerDuplex rollerRegistration sensorOPC drum
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84Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 84
Adjustment/SP Modes
SP Modes: Examine these SP modes in the FSM:SP 1001: Leading edge registrationSP 1002: Side to side registrationSP 1003: Paper feed timingSP 2301: Transfer current timingSP 7504 60: Registration duplex: OffSP 7504 123: Duplex inverter: OffSP 7504 125: Duplex inverter: On
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85Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 85
D067/D072/D068/D069Service Training
ARDF (B872)
Paper Tray Unit (B696)The ARDF will be discussed.
In this section you will do these things:Examine the mechanical layout for the ARDF.Examine the feed process.Review the replacement and adjustment procedures.
When you finish this section, you should know the answers to these questions:Are the optics fixed or do they move for original scanning?What paper sizes can the ARDF handle?
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86Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 86
SpecificationsPaper sizes:
A4 SEF, A5 SEF8½" x 5½“ SEF, 8½“ x 14“ SEF
Paper weight: 52-105 g/m² (14-28 lb.)Tray Capacity: 50 sheets (80 g/m², 21 lb.)Transport: Roller transportFeed order: Top firstSeparation: FRR (Feed and Reverse Roller)Original transport: Roller transportReproduction range: 50-200%Power source: 24 and 5 Vdc from the copier
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87Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 87
Mechanical Layout
Inverter RollerJunction GateExit Roller
Pick-up RollerPaper Feed RollerSeparation Roller
Mechanical LayoutThis slide shows some of components for ARDF. See ARDF DF1000 (B872) in FSM for full details and technical drawings.
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88Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 88
Electrical Component Layout - 1
Junction Gate Solenoid
Original Set Sensor
DF Drive Board
Inverter Sensor
Left Cover Sensor
Registration Sensor
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89Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 89
Electrical Component Layout-2
DF Drive Board
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90Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 90
Electrical Component Layout - 3
DF Drive Board
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91Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 91
ARDF Drive Layout - 1/2
DF Feed Motor drives separation, pick-up, transport, and inverter rollers.See FSM for more details on B872.
Separation Roller
Feed RollerDF Feed Motor Pick-up Roller
Inverter Roller
Transport Roller
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92Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 92
ARDF Drive Layout - 2/2
DF Transport motor drives registration and exit rollers.
See FSM for more details on B872.
Registration Roller
Exit RollerDF Transport Motor
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93Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 93
Paper Transport - Pick up and Feed
Original Set Sensor
Paper Feed Roller
Original Size DetectionOriginal pushes down feeler of original set sensor when original is placed on feeder table.ARDF does not detect paper sizes.
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94Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 94
Paper Transport Pickup and Separation
Separation:ARDF uses FRR (feed & reverse roller) system.DF-Feed Motor drives DF pickup roller, DF feed roller, DF separation roller, and transport roller.Pickup roller drives top sheet(s) between feed and separation roller, where top sheet is separated and fed to transport rollers.
Clutch Operation:DF feed clutch stops feeding when original is fed to inverter tray in double-sided mode. If DF feed clutch didn’t stop pick-up, feed, and separation rollers in double-sided mode, next original would be fed while first original was at inverter tray and an original jam would occur.
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95Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 95
Paper Transport - Two-sided OriginalsTwo-sided Transport Details
After original has been fed to registration sensor by transport roller, DF feed motor briefly stops.After scanner moves to DF scan position, front side of original is scanned.When exit sensor detects leading edge of original, junction gatesolenoid is activated, opening junction gate.Original is then transported towards inverter table.After trailing edge of original passes exit sensor, junction gate solenoid switches off and junction gate is closed.Following feeding of original onto inverter table, feed and transport motors stop.Feed motor rotates in reverse and original is fed to exit roller by inverter roller.Feed motor stops briefly to adjust original skew. After adjusting, original is fed again by exit roller and registration roller to the scanning area (where reverse side will be scanned).Original is then sent to inverter table again to be turned over, enabling duplex output to be properly stacked front side down in exit tray.
See ARDF illustrations on following pages.
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96Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 96
Paper Transport - Two-sided Originals - 1/3
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97Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 97
Paper Transport - Two-sided Originals - 2/3
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98Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 98
Paper Transport - Two-sided Originals - 3/3
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99Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 99
Replacement and AdjustmentBefore you start:
Remove exterior cover and original table. (See Replacement and Adjustment section of ARDF DF1000 (B872) FSM)
Practice removal procedures for the following as outlined in FSM
Pick-up roller Paper feed rollerSeparation rollerDF feed motorDF feed clutchSensorsDF drive board
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100Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 100
Rear Cover - 1/2Replacement and Adjustment
Open ARDF
Release three hooks
ARDF
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101Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 101
Rear Cover - 2/2Replacement and Adjustment
Open left cover
Open original tray
Rear CoverOriginal Tray
Left Cover
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102Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 102
Original Feed UnitReplacement and Adjustment
Original Feed Unit
Open left cover
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103Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 103
Separation RollerReplacement and Adjustment
SeparationRoller
Open left cover
SeparationRoller Stopper
SeparationRoller Cover
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104Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 104
SP Modes and SC CodesThese SP modes are used for the ARDF:
SP 6006 1: Side to side/front registrationSP 6006 2: Leading registrationSP 6006 3: Trailing eraseSP 6006 5: Sub-scan magnificationSP 6009 1: ARDF free run in duplex modeSP 6009 3: ARDF free run in simplex modeSP 6910 1: ARDF shading time
These SC codes are for the ARDF. They are all level “B” error codes:
SC 760: DF gate error 1SC 761: DF gate abnormal 2SC 762: DF gate abnormal 3
Do the above SP modes if you are unfamiliar with them.
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105Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 105
Preventive Maintenance
These need to be replaced at PM interval 90K:Separation rollerPick-up rollerFeed roller
Clean remaining parts when necessary.
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106Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 106
D067/D072/D068/D069Service Training
Paper Tray Unit (B421)
Paper Tray Unit (B421)The optional paper tray unit will be discussed.
In this section you will do these things:Examine the mechanical layout for the paper tray unit.Examine drive and paper lift.Learn how the paper tray unit detects the paper end.Replace the friction pad and feed roller.
When you finish this section, you should know the answers to these questions:What feed mechanism does the paper tray unit use?How is the paper end detected?Which components will I need to replace?
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107Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 107
OverviewPaper tray unit is an option for this machine.
Paper tray unit uses standard mechanisms for these:
Paper feed (friction pad method)Paper lift (springs)Paper end detection (feeler method)
Paper tray unit does not have any mechanism to detect paper size. If you want to change paper size, you must set new paper size in machine memory with a user tool. This will prevent timing jams.
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108Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 108
SpecificationsPaper sizes:
A4 SEF8 ½ " x 11“ SEF8 ½ “ x 13 “ SEF8 ½ “ x 14 “ SEF
Paper weight: 60-90 g/m² ( 16-24 lb.)
Tray Capacity: 500 sheets
Paper feed system: Feed roller and friction pad
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109Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 109
Mechanical Component Layout
Friction PadBottom Plate
Feed RollerOptional Tray Heater
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110Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 110
Drive Layout
Friction Pad
Feed Roller
PaperFeed
Clutch
Paper Feed Motor
Find these components if you’re not already familiar with them.
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111Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 111
Paper Feed and Separation
Friction Pad
Paper Feed Roller
Find these components if you’re not already familiar with them.
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112Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 112
Paper Lift Mechanism
Rounded Slider
Springs
Latch
Bottom Plate
RunnerWhen pushing down bottom plate, latch will set, locking plate down, compressing spring below.
After loading paper, when pushing paper tray back into machine, runner pushes rounded slider, releasing latch. Then compressed springs push plate up and keep latch retracted (preventing plate from becoming locked down under a full load of paper.)
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113Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 113
Paper End Detection
Cutout
Paper End FeelerPaper End Sensor
If there is paper in tray, feeler will push up and sense this. If there is no paper in tray, feeler drops in the cutout and activates sensor.
Feeler is rounded and moves when tray is pushed in or out, preventing feeler from getting caught in tray.
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114Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 114
Side and End Fences
Side FenceEnd Fence
Side Fence: Set width to A4, 81/4", or 81/2".End fence: Set from 11" to 13", with standard settings at 11", A4, and 13". To feed 14" paper, end fence must be removed (and stored in an internal storage compartment).You can secure both fences with screws at standard positions.
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115Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 115
Replacement and AdjustmentExamine how to remove paper tray unit from machine before you do replacement procedures. (Read Paper Tray Unit section of FSM.)
You will usually have to replace these (PM interval every 120K) in the field due to normal wear and tear. Practice these removal procedures:
Feed roller and friction padSensorsDrive blockPaper feed motorPaper feed clutchTray main boardClean the bottom plate when necessary
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116Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 116
Feed Roller & Friction PadReplacement and Adjustment
Remove the paper tray before replacing any parts
Friction Pad
Clip Ring
ShaftAssembly
FeedRoller
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117Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 117
SensorsReplacement and Adjustment
Remove the paper tray before replacing any parts
PaperFeed
Sensor
Feeler
PaperEnd
Sensor
PTU(right)
PTU - Paper Tray Unit
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118Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 118
Drive (Drive Block)Replacement and Adjustment
Remove PTU (Paper Try Unit) from copier.
Open right door of PTU
DriveBlock
PTU(right)
PTU - Paper Tray Unit
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119Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 119
Drive (Paper Feed Motor)Replacement and Adjustment
Remove Drive Block (see previous slide) Paper Feed Motor
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120Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 120
Drive (Paper Feed Clutch)
Replacement and Adjustment
Remove Drive Block
Detach Clutch Cover
ClutchCover
PaperFeed
Clutch
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121Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 121
Drive (Tray Main Board)Replacement and Adjustment
Tray Main Board
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122Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 122
D067/D072/D068/D069Service Training
Fax Unit
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123Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 123
Fax Unit - Overview
Basic fax unit consists of two PCBs: one FCU and one MBU.
FCU controls all fax communications and fax features (together with controller board). MBU contains ROM and SRAM. Also, FCU has an NCU circuit.
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124Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 124
FCU Board
FCU (Facsimile Control Unit) controls fax communications, video interface to base copier’s engine, and all the fax options.
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125Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 125
FCU Details - 1/2FCU (Facsimile Control Unit) controls fax communications, video interface to base copier's engine, and all fax options.
FACE3 (Fax Application Control Engine)CPU(DCR) Data Compression and ReconstructionDMA controlClock generationDRAM backup control
Modem (FAME)V.34, V33, V17, V.29, V.27ter, V.21, and V.8
DRAM16 MB of DRAM is shared as follows.
» SAF memory: 4MB» Working memory: 4MB» Page memory: 8MB
SAF memory is backed up by a rechargeable battery.Memory Back-up
Rechargeable battery backs up SAF memory (DRAM) for 12 hours.
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126Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
Slide 126
FCU Details - 2/2MBU
Flash ROM on this board contains FCU firmware, and SRAM contains system data and user parameters. Even if FCU is changed, system data and user parameters are kept on MBU board.
ROM3MB flash ROMs for system software storage
SRAM (Static Random Access Memory)128 KB SRAM for system and user parameter storage is backed up by lithium battery.
Memory Back-upLithium battery backs up system parameters and programmed items in SRAM, in case base copier's main switch is turned off.
SwitchesSW1
» Switches SRAM backup battery on/off.
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127Ricoh Co. Ltd. http://www.ricoh.com/
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Specifications - FaxType: Desktop type transceiverCircuit: PSTN, PBX
Original size:Book (face down)
Maximum length: 297 mm (11.7 inch)Maximum width: 216 mm ( 8.5 inch)
ADF (face up)Length: 128-1200 mm ( 5.0-47.2 inch)Width: 105-297 mm ( 4.1-11.7 inch)
Transmission time: G3, 3 seconds at 28.8K bpsLook in specifications section of fax manual pages for more details.
Specifications:The fax unit can scan at these resolutions:
200 x 100 dpi (standard)200 x 200 dpi (detail)200 x 400 dpi (fine)
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128Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
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D067/D072/D068/D069Service Training
Preventive Maintenance
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129Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
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Before You StartMake sure you understand all warnings and precautions before you service machine.
Most parts have a PM interval of 90 K (PCU has a PM interval of 45 K).
Some parts require cleaning only. You do not need to replace these parts.
You must clear PM counter with SP 7804 after you do a PM schedule.
Refer to:Preventative maintenance section of FSMHow to clear the PM counter (SP 7804-1)
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130Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
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Copy Image Adjustments - OverviewCopy image adjustments need to be done after doing the following:
Memory all clearReplacement of first or second scannerReplacement of lens blockReplacement of polygon mirrorReplacement of paper tray
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131Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
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Printing AdjustmentsLeading edge registration: Check this for each paper tray. Use SP 1001 and make sure registration is set to correct tolerance levels.
Side to side registration: Use SP 1002 and make sure registration is set to correct tolerance levels.
Blank margin: Adjust leading edge and left edge margins only if you could not correctly adjust registration.
Use SP 5902 to print test pattern to check adjustments.
Blank margin
Adjust margins in this orderTrailing edge Right edge Leading edge Left edge
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132Ricoh Co. Ltd. http://www.ricoh.com/
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Scanning Adjustments
Leading edge registration: Use SP 4010 for this adjustment.
Sub-scan magnification: Use SP 4008 for this adjustment.
Main scan magnification: Use SP 4009 for this adjustment.
Scan Auto Adjustment - See Scan Auto Adjustment in the Preventive Maintenance chapter of the FSM.
Do registration and blank margin adjustments for printing beforescanner is adjusted. Use A4 test chart to perform all adjustments.
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133Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
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D067/D072/D068/D069Service Training
Troubleshooting
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134Ricoh Co. Ltd. http://www.ricoh.com/
D067/D072/D068/D069 / S-C4
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OverviewSC codes refer to hardware or firmware malfunctions of copy/print engine. SC codes are shown on LCD screen of operation panel.
This machine has four levels of service call conditions. Make sure you note which codes can be cleared by user and which codes cannot be cleared by user.
Examine these before you replace any component in the machine:
If the problem is with circuit boards: Disconnect and then reconnect all connectors before you replace a circuit board.
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135Ricoh Co. Ltd. http://www.ricoh.com/
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Sensor/Switch Open ErrorsExamine Service Call Conditions in Troubleshooting Unit. This table explains symptoms machine will exhibit when a sensor or switched circuit is in an open condition.
Open front or right door. Make sure "Close Front/Right Cover" message is indicated on screen.
Do some open sensor examples from Troubleshooting unit. Use caution not to damage any connectors.
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136Ricoh Co. Ltd. http://www.ricoh.com/
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Blown Fuse Conditions
Read Blow Fuse Conditions section of Troubleshooting Unit of FSM. It shows what happens if a power supply board fuse burns out.
Pull copy tray out and simulate a blown fuse condition.
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137Ricoh Co. Ltd. http://www.ricoh.com/
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Machine FunctionsDo these practical assignments to learn more about how to troubleshoot machine:
Test patterns: Print several different test patterns indicated in the "Test Pattern Print (SP 5902-1)" section of Service Tables unit in FSM.Output check: Use output check mode to test operation of polygon motor, main motor, and fan motor. Free run
» Scanner, SP 4013» Machine, SP 5802» Printer, SP 5901» ARDF, SP 6009
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138Ricoh Co. Ltd. http://www.ricoh.com/
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Slide 138
Sensors and SwitchesPractice these to learn how to troubleshoot sensors and switches:
Input check: This lets you check condition of most sensors and switches in machine. ID sensor analysis (SP 2221) lets you check these:
» Vsg (displayed as Vg) » Vsp (displayed as Vp) » Power (displayed as PW. This is the power for the light
source.) » Vsdp (displayed as Vg-Vp. This value does not have any
error conditions.) » Vt
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139Ricoh Co. Ltd. http://www.ricoh.com/
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End of Course
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