Oki C9500 Series User manual

41956001TH Rev.6 1 / 198
Oki Data CONFIDENTIAL
C9500 /C9300
Color LED Page Printer
MAINTENANCE
MANUAL
ODA
050225A (rev.6)

41956001TH Rev.6 2 /
Oki Data CONFIDENTIAL
1 2002-10-23
2 2002-11-29 NP11 Haruyama
3 2003-06-06 2.3, 7 22,157 Part No. of the Control Panel Bezel ME4 Ueda
4 2003-07-14 Add VE Version CU CN11 Yamanaka
5 2004-01-27 157 Partial change CN11 Yamanaka
6 2004-03-05 Partial change NP32 Ishizuka
Rev.No. Date No.
Corrected items
Page Description of change Person in
change
Document Revision History

41956001TH Rev.6 3 /
Oki Data CONFIDENTIAL
PREFACE
Thismaintenancemanualprovidesproceduresandtechniquesforthetroubleshooting,maintenance,and
repair of C9500/C9300.
This manual is written for maintenance personnel, but it should always be accompanied with the C9500/
C9300 User’s Manual for procedures for handling and operating C9500/C9300. For repairing each
component of C9500/C9300, see the Troubleshooting manual.
[Notices]
The contents of this manual are subject to change without prior notice.
Althoughreasonableeffortshavebeentakeninthepreparationofthismanualtoassureitsaccuracy,this
manual may still contain some errors and omissions. OKI will not be liable for any damage caused or
alleged to be caused, by the customer or any other person using this maintenance manual to repair,
modify, or alter C9500/C9300 in any manner.
[Warning]
Many parts of C9500/C9300 are very sensitive and can be easily damaged by improper servicing. We
strongly suggest that C9500/C9300 be serviced by OKI’s authorized technical service engineers.

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Oki Data CONFIDENTIAL
CONTENTS
1. SPECIFICATIONS ............................................................................................ 7
1.1 Basic System Configuration............................................................................................. 7
1.2 Printer Engine Specifications ........................................................................................... 8
1.3 Option Configuration ........................................................................................................ 9
1.4 Specifications................................................................................................................. 11
2. PARTS REPLACEMENT................................................................................ 13
2.1 Precautions in Replacing Parts...................................................................................... 13
2.2 Parts Layout................................................................................................................... 15
2.3 Replacing Parts..............................................................................................................22
2.3.1 Top cover.......................................................................................................... 23
2.3.2 LED Head / LED Spring / Post-Guide............................................................... 24
2.3.3 Top Cover Unit ................................................................................................. 25
2.3.4 Control Panel Assy / Control Panel Bezel / LED Control PWB / Toner Sensor /
Stack Full Sensor / Control Panel / Control Panel Tape Harness / Eject Roller26
2.3.5 Top Cover Handle / Top Cover Latch / Top Cover Latch Spring...................... 27
2.3.6 Eject Guide Assy .............................................................................................. 28
2.3.7 Cassette Assy / Cover-Blind / Side Cover Assy ............................................... 29
2.3.8 Feed Roller ....................................................................................................... 30
2.3.9 Left Side Cover................................................................................................. 31
2.3.10 Face Up Tray.................................................................................................... 32
2.3.11 Front Cover....................................................................................................... 33
2.3.12 Rear Cover ....................................................................................................... 34
2.3.13 Multipurpose Tray Assy / Multipurpose Tray Cover Assy / Link /
Multipurpose Tray Top Cover / Multipurpose Tray Drive Gear / OHP Sensor. 35
2.3.14 Drum Contact Assy........................................................................................... 37
2.3.15 Media Thickness Sensor Assy......................................................................... 38
2.3.16 Registration Roller Assy (A) / Registration Drive Gear (A) ............................... 39
2.3.17 Registration Roller Assy (B) ............................................................................. 40
2.3.18 Registration Clutch / Registration Motor Assy .................................................. 41
2.3.19 ID Cooling Fan.................................................................................................. 42
2.3.20 Color Registration Sensor Assy........................................................................ 43
2.3.21 Duplex Guide Assy........................................................................................... 44
2.3.22 Electrical Chassis / Electrical Chassis Cooling Fan ......................................... 45
2.3.23 Print Engine Controller PWB ............................................................................ 46
2.3.24 Printer Unit Chassis.......................................................................................... 47
2.3.25 Entrance Cassette Sensor Actuator ................................................................. 48
2.3.26 Entrance Sensor PWB (R71)............................................................................ 49
2.3.27 Entrance MT Sensor Actuator / Entrance Belt Sensor Actuator /
Entrance Waste Toner Sensor Actuator.......................................................... 50
2.3.28 Main Cooling Fan (PULL) Assy / Main Cooling Fan (PUSH) /
Fuser Eject Roller ............................................................................................. 51
2.3.29 Eject Sensor Assy ............................................................................................ 52
2.3.30 Fuser Latch Handle (L)..................................................................................... 53
2.3.31 Belt Motor Assy ................................................................................................ 54
2.3.32 Fuser Latch Handle (R) .................................................................................... 55
2.3.33 Main Motor Assy............................................................................................... 56
2.3.34 Contact Assy / Side Plate Assy ........................................................................ 57
2.3.35 Low-voltage Power Unit.................................................................................... 58
2.3.36 High-voltage Power Unit................................................................................... 59
2.3.37 Main Feeder Assy............................................................................................. 60
2.3.38 Fuser Unit ......................................................................................................... 61

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Oki Data CONFIDENTIAL
2.3.39 Belt Unit ............................................................................................................ 62
2.3.40 Duplex Unit ....................................................................................................... 63
2.3.41 CU Assy............................................................................................................ 64
3. Adjustment ....................................................................................................67
3.0 System Maintenance MENU.......................................................................................... 67
3.0.1 ID Check Pattern Printing ( " TEST PRINT MENU " item )............................... 68
3.1 Maintenance Mode and Functions................................................................................. 68
3.1.1 Maintenance menu........................................................................................... 68
3.1.2 Engine maintenance mode............................................................................... 70
3.1.2.1 Operator panel .................................................................................. 70
3.1.2.2 General self-diagnostic mode (Level 1) ............................................ 70
3.1.2.2.1 Entering self-diagnostic mode (Level 1)............................. 71
3.1.2.2.2 Exiting self-diagnostic mode ............................................. 71
3.1.2.3 Switch scan test ................................................................................ 71
3.1.2.4 Motor clutch test................................................................................ 75
3.1.2.5 Test print ........................................................................................... 78
3.1.2.6 NVM initialization............................................................................... 82
3.1.2.7 Consumable counter display............................................................. 83
3.1.2.8 Consumable counter display - continuous ........................................ 83
3.1.2.9 Error Messages and their details ...................................................... 84
3.1.3 Various print jobs with single printer unit attached with a controller ................. 89
3.2 Adjustments after Parts Replacement ........................................................................... 90
3.2.1 Precautions in replacing engine control board ................................................. 90
3.2.2 Precautions in replacing EEPROM................................................................... 90
3.2.3 EEPROM replacement after CU board replacement........................................ 91
3.2.4 Destination Setting (Checking Method: Printing Demo Page).......................... 91
3.2.5 Recovery Flash ROM data on CU board.......................................................... 92
3.2.6 Notes on replacing Oki LAN8100e or CU boards equipped with Oki LAN8100e . 92
3.3 Adjusting the Density ..................................................................................................... 92
3.4 Paper Thickness Detection Sensitivity Adjustment and Media Thickness Detection
Value Check................................................................................................................... 93
3.4.1 Applicable Operating Systems and Interfaces, and File Required ................... 93
3.4.2 Setting .............................................................................................................. 94
3.4.2.1 Menu Setting ..................................................................................... 94
3.4.2.2 Media Setting .................................................................................... 96
3.4.2.3 Sensitivity Adjustment ....................................................................... 97
3.4.2.4 Actions for NG Sensitivity Adjustment............................................... 98
3.4.3 Inputting the density of the calibration chip for density detection ..................... 99
3.4.3.1 Density Adjustment Menu Setting ..................................................... 99
3.4.4 Electronic Serial Number Input....................................................................... 101
4. Regular Maintenance .................................................................................. 102
4.1 Parts Replaced Regularly ............................................................................................ 102
4.2 Cleaning....................................................................................................................... 102
4.3 Cleaning of LED Lens Array ........................................................................................ 102
4.4 Cleaning Pick-up Roller ............................................................................................... 102
5. Troubleshooting Procedures ..................................................................... 103
5.1 Precautions before troubleshooting ............................................................................. 103
5.2 Precautions before handling an abnormal image ........................................................ 103
5.3 Precautions upon handling an abnormal image........................................................... 103
5.4 Preparing for Troubleshooting ..................................................................................... 104
5.5 Troubleshooting Procedure.......................................................................................... 104

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Oki Data CONFIDENTIAL
5.5.1 LCD message list ........................................................................................... 105
5.5.2 Preparing for troubleshooting ......................................................................... 111
5.5.3 Troubleshooting for abnormal images ............................................................ 122
5.6 Fuse check................................................................................................................... 137
6. WIRING DIAGRAM...................................................................................... 138
6.1 Resistance Check ........................................................................................................ 138
6.2 Parts Layout on Boards ............................................................................................... 144
7. Parts List ...................................................................................................... 152
APPENDIX A INTERFACE SPECIFICATIONS ................................................. 171
1. Parallel Interface Specifications................................................................................... 171
1.1 Parallel Interface...................................................................................................
1.2 Parallel Interface Connector and Cable.......................................................... 171
1.3 Parallel Interface Level ................................................................................... 171
1.4 Timing Charts ................................................................................................. 172
1.5 Parallel I/F Signals.......................................................................................... 173
2. Universal Serial Bus (USB) Interface Specifications.................................................... 174
2.1 USB Interface ................................................................................................. 174
2.2 USB Interface Connector and Cable .............................................................. 174
2.3 USB Interface Signals .................................................................................... 174
APPENDIX B 2ND/3RD TRAY, HIGHT CAPACITY TRAY UNIT ..................... 175
APPENDIX C C7100/7300/9300/9500 SERIES ERROR MESSAGES ............. 185
1. C7100/7300/9300/9500 Series (Error messages) ....................................................... 185
2. C7100/7300/9300/9500 Series (Error messages : Related to Color, Media Detect) ... 192
3. C7100/7300/9300/9500 Series (Warning messages : Related to usage, media) ........ 195
4. C7100/7300/9300/9500 Series (Warning messages : Job Account) ........................... 196
5. C7100/7300/9300/9500 Series (Other Warning) ......................................................... 197

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Oki Data CONFIDENTIAL
MM M MMMMM
LED Head
Centronics I/F
USB I/F
2 × Option Slots
Junction Board
Pulse Motor
Engine Control
Low Voltage
Power Unit
Fuser
Unit
High Voltage
Power Unit 2nd/3rd Tray
High Capacity
Tray
Duplex
Unit
Belt
Unit
<Sensors, Switches and Thermistors>
Paper size sensor (4 bits)
Paper empty sensor
Paper near empty sensor
MT paper empty sensor
FF home switch
Loading sensor 1
Loading sensor 2
C-ID
Unit
M-ID
Unit
Y-ID
Unit K-ID
Unit
C ID M ID Y ID K IDBelt Heat MT/
Registration Hopping
Operator Panel
2 × ROM
DIMMs
3 × RAM
DIMM
IDE
I/F(HDD)
DC Fan
Note
Note Option Slot: LAN Card
< advanced Sensors>
Media Thickness Detection
Density Detection
Color Misalignment Detectin
1. SPECIFICATIONS
1.1 Basic System Configuration
The basic system configuration of C9500/C9300 is illustrated in Figure 1.1.
Figure 1.1

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Oki Data CONFIDENTIAL
1.2 Printer Engine Specifications
The inside of the printer is composed of the followings:
• Electrophotographic Processor
• Paper Paths
• Controller Block (CU and PU)
• Operator Panel
• Power Units (High-Voltage Unit and Low-Voltage Unit)
Figure 1-2 shows the printer configuration.
Figure 1.2

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Oki Data CONFIDENTIAL
1.3 Option Configuration
The followings are available as options on C9500/C9300.
(1) 2nd Tray/ 3rd Tray
Note: Don’t use one for
C9200/C9400
(2) Duplex Unit
(3) High-Capacity Tray
(4) Expansion Memory 64/128/256/512MB
(5) Internal Hard Disk
(6) Ethernet Board
Note: Don’t use one for
C9200/C9400
Note: Don’t use one for
C9200/C9400
Note: Don’t use one for
C9200/C9400
Note: Don’t use one for
C9200/C9400
Note: Don’t use one for
C9200/C9400

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Oki Data CONFIDENTIAL
(7) Finisher Unit
(8) Simplified Color Copy Unit * Equipped with exclusive auto feeder
(9) Dual-Purpose Finisher and Copy Unit Table, and Copy Unit Extension Rack
Color Copy Unit Extension Rack
Dual-Purpose Finisher and Copy Unit Table
(10) 2nd/3rd Tray Unit on Casters
Note: Don’t use one for
C9200/C9400

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Oki Data CONFIDENTIAL
1.4 Specifications
(1) External Dimensions Height: 460mm Width: 666mm Length: 626mm
(2) Weight 72 kg
(3) Paper Type: Ordinary paper and transparencies (Recommended: ML
OHP01)
Size: Postal card, Legal 13" or 14", Executive, A4, A5, B5, A6,
A3 A3-Nobi, B4
(Only the 1st tray and the front feeder support A6 and
postal card sizes.)
Weight: 1st tray 17 lb to 54 lb (64 to 203g/m2)
Multi Purpose feeder 17 lb to 54 lb (64 to 203g/ m2)
(4) Print Speed Color: 30 pages per minute
(A4 LEF) (Transparency: Pages per minute)
Monochrome: 37 pages per minute
(Transparency: Pages per minute)
Postal Card, Label, Thick Paper: 12Pages per minute
(5) Resolution 600 x 600 dots per inch ( C9300 )
1200 ×1200 dots per inch ( C9500 )
(6) Power Input 115V~127V , 220V~240V
(7) Power Consumption Peak: 1600W Normal Operation: 800W (5% duty)
Idle: 250W Power Saving Mode: 70W
(8) Frequency 50Hz or 60Hz±2Hz
(9) Noise Operating: 55 dB (without Option units)
Standby: 45 dB
Power Saving: 43 dB
(10) Consumable Life Toner Cartridge: 7,500 pages (5% duty)
Large-Capacity Toner Cartridge: 15,000 pages (5% duty)
(in each of Y, M, C and K)
Image Drum: 26,000 pages (5% duty, Continuous printing)
(in each of Y, M, C and K)
(11) Parts Replaced Periodically
Fuser Unit Assy: Every 80,000 pages
Belt Cassette Assy: Equivalent of 80,000 pages (3P/J)
Transfer Belt cartridge: 60,000 prints

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Oki Data CONFIDENTIAL
Temperature (ºF) RemarkTemperature (ºC)
Operating 50 to 89.6 10 to 32 17 to 27ºC (Temperatures to
assure full color print quality)
Non-Operating 32 to 109.4 0 to 43 Power-off
Storage (Max. One Year) -14 to 109.4 -10 to 43 With drum and toner
Transport (Max. One Month) -20 to 122 -29 to 50 With drum and without toner
Transport (Max. One Month) -20 to 122 -29 to 50 With drum and toner
Relative Humidity (%) Max. Wet-Bulb Temperature (ºC) Remark
Operating 20 to 80 25 50 to 70%
(Humidities to assure full color print quality)
Non-Operating 10 to 90 26.8 Power-off
Storage 10 to 90 35
Transport 10 to 90 40
(12) Temperatures and Relative Humidities
Temperature
Humidity
(13) Printer Life 1,000,000 pages (on a A4 basis) or five years

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Oki Data CONFIDENTIAL
2. PARTS REPLACEMENT
This section describes the procedure for replacing the parts, assemblies and units in the
field.The replacing procedure is given for detachment. To attach, use the reverse procedure.
2.1 Precautions in Replacing Parts
(1) Before replacing the parts, be sure to remove the CA cable and the interface cable.
(a) To remove the AC cable, always use the following procedure.
1Flip the power switch of the printer off (to “O”).
2Pull the AC inlet plug of the AC cable out of the AC receptable.
3Remove the AC cable and the interface cable from the printer.
(b) To connect the printer again, always use the following procedure.
1Connect the AC cable and the interface cable to the printer.
2Insert the AC inlet plug into the AC receptacle.
3Flip the power switch of the printer on (to “I”).
(2) Do not disassemble the printer so long as it operates properly.
(3) Minimize the disassembly. Do not detach parts other than those shown in the replacing
procedure.
(4) For maintenance applications, use designated tools.
(5) Follow the order instructed to disassemble the printer. Incorrect order may damage the
parts.
(6) Small parts such as screws and collars tend to get lost, so temporarily place and fix them
in their original positions.
(7) When handling ICs and circuit boards such as microprocessors, ROMs and RAMs, do not
use gloves that likely to have static.
(8) Do not place the printed circuit boards directly on the printer or the floor.
Disconnect
Connect

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Oki Data CONFIDENTIAL
No.
No. 1-100 Philips
screwdriver
Q' ty Place of use RemarksService Tools
1
2
3
4
5
6
8
No. 2-200 Philips
screwdriver, Magnetized
No. 3-100 screwdriver
No. 5-200 screwdriver
Digital multimeter
Pliers
Handy cleaner
LED Head cleaner
P/N 4PB4083-2248P001
High voltage probe
1
1
1
1
1
1
1
2~2.5 mm screws
3~5 mm screws
Cleans LED head
9 1
7 1
Transparency sheet
( thickness premeasured)
42404301
Stage height adjustment jig
42423701
- Microdriver
2.0mm
Adjustment for Media
Thickness sensor
Adjustment for Media
Thickness sensor
Adjustment for Lever
adjust
(Media Thickness)
10
11
12
1
1
1
Label
[Maintenance Tools]
Table 2-1 lists tools necessary to replace the units.
Table 2-1 Maintenance Tools

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Oki Data CONFIDENTIAL
2.2 Parts Layout
Figure 2.1

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Figure 2.2
[Top Cover Assy]

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Figure 2.3
[Printer Unit-1/2]

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Oki Data CONFIDENTIAL
Figure 2.4
[Printer Unit-2/2]

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Oki Data CONFIDENTIAL
Figure 2.5
[Cassette Guide Assy (L), (R)]

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Oki Data CONFIDENTIAL
Figure 2.6