Oki C 9400 User manual

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Oki Data CONFIDENTIAL
C9400/C9200
ColorLEDPagePrinter
MAINTENANCE
MANUAL
ODA/OEL/INT
2002-12-10 Rev.6

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Oki Data CONFIDENTIAL
1 2000-12-05 ISSUE EM3 Murakami
2 2000-12-13 8 Correction of errors in K Yamazaki
the parts list
3 2001-05-15 CN11 Kasuya
4 2001-10-12 K Yamazaki
5 2002-11-27 K Yamazaki
6 2002-12-10 NP34 Ueda
Rev.No. Date No.
Corrected items
Page Description of change Person in
charge
Document Revision History

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Oki Data CONFIDENTIAL
PREFACE
Thismaintenancemanualprovidesproceduresandtechniquesforthetroubleshooting,maintenance,and
repair of C9400/C9200.
This manual is written for maintenance personnel, but it should always be accompanied with the C9400/
C9200 User’s Manual for procedures for handling and operating C9400/C9200. For repairing each
component of C9400/C9200, 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 C9400/C9200 in any manner.
[Warning]
Many parts of C9400/C9200 are very sensitive and can be easily damaged by improper servicing. We
strongly suggest that C9400/C9200 be serviced by OKI’s authorized technical service engineers.

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Oki Data CONFIDENTIAL
CONTENTS
1. SPECIFICATIONS ............................................................................................ 6
1.1 Basic System Configuration............................................................................................. 6
1.2 Printer Engine Specifications ........................................................................................... 7
1.3 Option Configuration ........................................................................................................ 8
1.4 Specifications................................................................................................................... 9
2. PARTS REPLACEMENT................................................................................ 11
2.1 Precautions in Replacing Parts...................................................................................... 11
2.2 Parts Layout................................................................................................................... 13
2.3 Replacing Parts..............................................................................................................20
2.3.1 Top cover.......................................................................................................... 21
2.3.2 LED Assy/ LED Assy spring ............................................................................. 22
2.3.3 Top cover unit................................................................................................... 23
2.3.4 Control panel Assy/ Control panel bezel/ LED control PWB/ Toner sensor/
Stack full sensor/ Control panel tape harness/ Eject roller ............................... 24
2.3.5 Top cover handle/ Tope cover latch/ Top cover latch spring............................ 25
2.3.6 Eject guide Assy ............................................................................................... 26
2.3.7 Cassette Assy/ Blind cover/ Side cover R Assy ............................................... 27
2.3.8 Feed rollers....................................................................................................... 28
2.3.9 Left side cover .................................................................................................. 29
2.3.10 Face-up tray ..................................................................................................... 30
2.3.11 Front cover ....................................................................................................... 31
2.3.12 Rear cover ........................................................................................................ 32
2.3.13 Multipurpose tray Assy/ Multipurpose tray cover Assy/ Links/
Multipurpose tray top cover/ Multipurpose tray drive gear................................ 33
2.3.14 Drum contact Assys.......................................................................................... 34
2.3.15 Registration roller Assy (A)/ Registration drive gear (A)................................... 35
2.3.16 Registration roller Assy (B)............................................................................... 36
2.3.17 Registration clutch, Registration motor Assy.................................................... 37
2.3.18 Cooling fan ....................................................................................................... 38
2.3.19 Color registration sensor Assy.......................................................................... 39
2.3.20 Duplex guide Assy............................................................................................ 40
2.3.21 Electrical chassis/ Electrical chassis cooling fan.............................................. 41
2.3.22 Printer engine controller PWB .......................................................................... 42
2.3.23 Printer unit chassis ........................................................................................... 43
2.3.24 Entrance cassette sensor actuator................................................................... 44
2.3.25 Entrance sensor PWB ...................................................................................... 45
2.3.26 Entrance MT sensor actuator and Entrance belt sensor actuator .................... 46
2.3.27 Main motor fan/ Fuser eject roller..................................................................... 47
2.3.28 Eject sensor Assy ............................................................................................. 48
2.3.29 Fuser latching handle (L).................................................................................. 49
2.3.30 Belt motor Assy ................................................................................................ 50
2.3.31 Fuser latching handle (R) ................................................................................. 51
2.3.32 Main motor Assy............................................................................................... 52
2.3.33 Contact Assy/ Side plate Assy.......................................................................... 53
2.3.34 Low voltage power supply ................................................................................ 54
2.3.35 High voltage power supply ............................................................................... 55
2.3.36 Main feed Assy ................................................................................................. 56
2.3.37 Fuser unit.......................................................................................................... 57
2.3.38 Belt unit............................................................................................................. 58
2.3.39 Duplex unit........................................................................................................ 59
2.3.40 CU Assy............................................................................................................ 60

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Oki Data CONFIDENTIAL
3. Adjustment ....................................................................................................62
3.1 Maintenance Menu and Its Functions ............................................................................ 62
3.2 Short Plug Settings ........................................................................................................ 63
3.3 Printing Singly Using Controller-Equipped Printer ......................................................... 63
3.4 Adjustment after Part Replacement ............................................................................... 64
3.5 Color Balance Adjustment ............................................................................................. 65
3.6 EEPROM Replacement after SWA Board and K73 Board Replacement ...................... 67
4. Regular Maintenance .................................................................................... 68
4.1 Parts to be Replaced Regularly ..................................................................................... 68
4.2 Cleaning......................................................................................................................... 68
4.3 Cleaning of LED Lens Array .......................................................................................... 68
4.4 Cleaning of Pick-up Roller ............................................................................................. 68
5. TROUBLESHOOTING PROCEDURES ......................................................... 69
5.1 Tips for Troubleshooting ................................................................................................ 69
5.2 Check Points before Correcting Image Problems.......................................................... 69
5.3 Tips for Correcting Image Problems .............................................................................. 69
5.4 Preparation for Troubleshooting .................................................................................... 70
5.5 Troubleshooting Flow..................................................................................................... 70
5.5.1 LCD Message List ............................................................................................ 71
5.5.2 LCD message troubleshooting ......................................................................... 79
5.5.3 Image troubleshooting...................................................................................... 90
6. WIRING DIAGRAM...................................................................................... 102
6.1 Resistance Check ........................................................................................................ 102
6.2 Parts Layout on Boards ............................................................................................... 107
7. Parts List ...................................................................................................... 111
7.1 Printer Unit Parts List ................................................................................................... 111
7.2 C9400/C9200 Finisher for OEL/INT Parts Layout........................................................ 131

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Oki Data CONFIDENTIAL
Job
offset
MM
M
M
M
M
M
LED Head
Junction Board
Pulse Motors
Engine Controller
Low-Voltage
Power Unit
Fuser Unit
High-Voltage
Power Unit
2nd/3rd Tray/
Large-Capacity
Tray
Duplex Unit
Belt Unit
<Sensors, Switches and Thermistors>
Paper carrier sensors
Paper size detection
Fuser temperature detection
Ambient temperature and humidity detection
Toner remaining detection
Color registration sensor
ID, belt and fuser checks
C-ID
Unit
M-ID
Unit
Y-ID
Unit K-ID
Unit
C ID
M
Heater M ID
Y ID
K ID
Belt MT/
Registration
Hopping
Geared
motor
DC motor
Operator Panel
Centronics
USB
IDE
HDD
DC
FAN
Ethernet
ROM DIMM ×3
SDRAM DIMM ×4
Controller
Block
1. SPECIFICATIONS
1.1 Basic System Configuration
The basic system configuration of C9400/C9200 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 C9400/C9200.
(1) 2nd Tray/ 3rd Tray
(2) Duplex Unit
(3) Large-Capacity Tray
(4) Expansion Memory 64/128/256MB
(5) Internal Hard Disk
(6) Ethernet Board

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Oki Data CONFIDENTIAL
(7) Finisher Unit (for C9400/C9200 OEL/INT Version)
1.4 Specifications
(1) Dimensions Height: 460mm Width: 666mm Length: 626mm
(2) Weight 72kg
(3) Paper Type: Ordinary paper and transparencies (Recommended: ML OHP01)
Size: Postalcard,Legal13"or14",Executive,A4,A5,B5,A6,A3A3-Nobi,B4
(Only the 1st tray and the front feeder support A6 and postal card
sizes.)
Weight: 1st tray 55 kg to 90 kg (64 to 105g/m2)
Front feeder 55 kg to 140 kg (64 to 163g/ m2)
(4) Print Speed Color: 21 pages per minute (Transparency: 5 pages per minute)
Monochrome: 26 pages per minute (Transparency: 15 pages per minute)
Postal Card, Label, Thick Paper: 10 pages per minute
(5) Resolution 600 ×600 dots per inch
(6) Power Input 100VAC ±10%
(7) Power Consumption Peak: 1400W Normal Operation: 550W (5% duty)
Idle: 150W Power Saving Mode: 50W
(8) Frequency 50Hz or 60Hz ±2%
(9) Noise Operating: 54 dB (without Second tray)
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: 39,000 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.OneYear) -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
Thissectiondescribestheprocedureforreplacingtheparts,assembliesandunitsinthefield. 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
1
1
1
1
1
1
1
2~2.5 mm screws
3~5 mm screws
Cleans LED head
9High voltage probe 1
7 1
[Maintenance Tools]
Table 2-1 lists tools necessary to replace the units.
Table 2-1 Maintenance Tools

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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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Figure 2.4
[Printer Unit-2/2]

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

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Figure 2.6

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Oki Data CONFIDENTIAL
A
B
C
D
E
A
B
C
D
E
Figure 2.7
[Duplex Unit]

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Oki Data CONFIDENTIAL
2.3 Replacing Parts
This section describes how to replace the parts and assemblies illustrated below.
41531301 41515110
Print Engine Controller PWB (2.3.22)
41502304 ×4
LED Assy (2.3.2)
40737401
Power-Unit AC-DC Switching (115V) (2.3.34)
40737501
Power-Unit AC-DC Switching (230V) (2.3.34)
40737601
HV Power Supply (2.3.35)
41531402, 41531404
Fuser Unit (2.3.37)
41531502
Belt Unit (2.3.38)
41178202
Duplex Unit (2.3.39)
41483001
Printer Unit
41500101
Insurator
41483701
Main Cooling Fan Assy (2.3.18)
2381018P0001
HV Tape Harness
41480901
Printer NIP 41483102
Printer Chassis (2.3.23)
41483202
Regist Roller Assy (A) (2.3.15)
41483301
Regist Roller Assy (B) (2.3.16)
41483401
Registration Motor Assy (2.3.17)
41187101
Registration Clutch (2.3.17)
41486601
Duplex Guide Assy (2.3.20)
41045802 ×2
Link (2.3.13)
41486202
MT Tray Cover Assy (2.3.13)
41278002
MT Top Cover (2.3.13)
40325101
MT Drive Gear (2.3.13)
41493002
Multipurpose Tray Assy (2.3.13)
41481301
Main Feed Assy (2.3.36)
41515801
PCE-Size Sence (2.3.36)
22011000P0140
IMSA-9714N-14A (2.3.36)
41481001
Unit-Lower-Frame (2.3.36)
41484902
Cassette Assy (2.3.7)
41277902
Cover-Blind (2.3.7)
41481701
Feed-Roller (2.3.8)
40863801
Plate-Side (2.3.21)
40850201
Contact Assy (2.3.33)
40841302
Fuser Latching Handle (L) (2.3.29)
41628301
Fuser Latching Handle Spring (2.3.29)
40841601
Entrance Sensor Actuator #1 (2.3.24)
41578501
Entrance Sensor Actuator #2 (2.3.26)
40841801
Entrance Sensor Actuator #3 (2.3.26)
41621801
Registration Shutter Solenoid Assy
41488801
Registration Shutter
41589401
Registration Shutter Spring
41641701
Fuser Driver Gear-A (2.3.27)
41095901
Fuser Exit Roller (2.3.27)
4PP4043-4489P001
Fuser Exit Roller Bushing (L) (2.3.27)
4PP4076-3949P001
Fuser Exit Roller Bushing (R) (2.3.27)
41189701 ×4
Drum Contact Assy (2.3.14)
41258301
Entrance Sensor PWB (2.3.25)
41491001
Color Registration Sensor Assy (2.3.19)
41073601
Exit Sensor Assy (2.3.28)
41483701
Main Motor FAN Assy (2.3.27)
40861001 ×8
LED Assy Spring (2.3.2)
41257902
LED Control PWB (Y71) (2.3.4)
41349801
Stack Full Sensor (2.3.4)
41349301 ×4
Eject Roller (2.3.4)
41484501
Control Panel Assy (2.3.4)
2381005P0015
Control Panel Tape Harness (2.3.4)
41514101
LED Harness K
41514102
LED Harness Y
41514103
LED Harness M
41514104
LED Harness C
41328402
Top Cover Handle (2.3.5)
41277602
Top Cover Latch (2.3.5)
40861401 ×2
Top Cover Latch Spring (2.3.5)
41484701
Eject Guide Assy (2.3.6)
41489001
Plate Assy-Side (2.3.33)
41493002
Multipurpose Tray (2.3.13)
41276502
Rear Cover (2.3.12)
41277402
Left Side Cover (2.3.9)
41481202
Right Side Cover (2.3.7)
41276402
Front Cover (2.3.11)
41277502
Face Up Tray (2.3.10)
41504401
Top Cover
41484402
Top cover (2.3.1)
40866212
Control panel Bezel (2.3.4)
41490702
Electrical Chassis Cooling Fan
41484101
Electrical Chassis (2.3.21)
41483801
Main Motor Assy (2.3.32)
41483902
Belt Motor Assy (2.3.30) 40841402
Fuser Latching Handle (R) (2.3.31)
41628301
Fuser Latching Handle Spring (2.3.31)