Oki B4500 Series User manual

Oki Data CONFIDENTIAL
B4500/B4550/B4600
Maintenance Manual
032007A
PRINTING SOLUTIONS

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Oki Data CONFIDENTIAL
Rev.No. Date
No.
Corrected items
Page Description of change
Person in
charge
Document Revision History
12007-01-17 ISSUE ME2 I.Kitano
HP24 Z.Takahashi

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Oki Data CONFIDENTIAL
PREFACE
This Maintenance Manual describes the field maintenance methods for B4600 Monochrome LED Page
Printers.
This manual is written for use by service persons. Please note that you should refer to the Printer Handbook
for the handling and operating methods of the equipment.

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1. CONFIGURATION ..................................................................................... 6
1.1 System Configuration ........................................................................ 6
1.2 Printer Configuration .......................................................................... 7
1.3 Optional Configuration ....................................................................... 8
1.4 Specification .................................................................................... 10
1.5 Safety Standards ............................................................................. 12
1.5.1 Certification Label .................................................................................... 12
1.5.2 Warning Label ......................................................................................... 12
1.5.3 Warning/Caution Marking ........................................................................ 13
2. PARTS REPLACEMENT ......................................................................... 14
2.1 Precautions for Parts Replacement ................................................. 14
2.2 Parts Layout..................................................................................... 16
2.3 How to Change Parts....................................................................... 19
2.3.1 Upper Cover Assy ................................................................................... 20
2.3.2 LED Head ................................................................................................ 21
2.3.3 Operator Panel Assy ............................................................................... 22
2.3.4 Lower Base Unit ...................................................................................... 23
2.3.5 Pulse Motor (Main/Drum) ........................................................................ 24
2.3.6 Pulse Motor (Registration) ....................................................................... 25
2.3.7 CLUTCH .................................................................................................. 26
2.3.8 Face Up Stacker Assy ............................................................................. 27
2.3.9 Eject Roller Assy ..................................................................................... 28
2.3.10 Motor Assy............................................................................................... 29
2.3.11 Hopping Roller Shaft Assy....................................................................... 30
2.3.12 Stacker Cover Assy ................................................................................. 31
2.3.13 Registration Roller ................................................................................... 32
2.3.14 Roller Transfer Assy ................................................................................ 33
2.3.16 Back-up Roller ......................................................................................... 35
2.3.17 Sensor Plate (Inlet) .................................................................................. 36
2.3.18 Sensor Plate (Outlet), Sensor Wire Assy ................................................ 37
2.3.19 Manual Feed Guide Assy ........................................................................ 38
2.3.20 Sensor Plate (Paper Supply) ................................................................... 39
2.3.21 Main control board ................................................................................... 40
2.3.22 Power Supply Board and High Voltage/Sensor Board ............................ 41
2.3.23 Cassette Guide L Assy ............................................................................ 42
2.3.24 Cassette Guide R Assy ........................................................................... 43
3. ADJUSTMENT ......................................................................................... 44
3.1 Maintenance Modes and Functions ................................................. 44
3.1.1 User Maintenance Mode (Administrator Menu) ....................................... 44
3.1.2 System Maintenance Mode (System Maintenance Menu) ...................... 46
3.1.3 EEPROM Initial Setting Range for Events............................................... 48
3.2 Adjustment When Replacing a Part ................................................. 49
4. PERIODICAL MAINTENANCE ............................................................... 50
4.1 Periodical Replacement Parts ......................................................... 50
4.2 Cleaning........................................................................................... 50
4.2.1 Cleaning of LED Lens Array .................................................................... 50
4.2.2 Cleaning Page Function .......................................................................... 52
CONTENTS

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5. TROUBLESHOOTING PROCEDURES .................................................. 53
5.1 Troubleshooting Tips ....................................................................... 53
5.2 Points to Check before Correcting Image Problems........................ 53
5.3 Tips for Correcting Image Problems ................................................ 53
5.4 Preparation for Troubleshooting ...................................................... 54
5.5 Troubleshooting Flow ...................................................................... 54
5.5.1 LCD Status Message/Problem List.......................................................... 54
5.5.2 LCD Message Troubleshooting ............................................................... 61
5.5.3 Image Troubleshooting ............................................................................ 69
6. WIRING DIAGRAM ................................................................................. 78
6.1 Interconnect Signal Diagram ........................................................... 78
6.2 PCB Layout and Connector Signal List ........................................... 79
6.3 Resistance Check ............................................................................ 95
APPENDIX A RS-232C SERIAL INTERFACE (OPTION) .......................... 97
APPENDIX B CENTRONICS PARALLEL INTERFACE........................... 102
APPENDIX C UNIVERSAL SERIAL BUS (USB)...................................... 111
APPENDIX D LOOP TEST (RS-232C INTERFACE) ................................ 117
APPENDIX E DIAGNOSTICS TEST ......................................................... 118
APPENDIX F MULTI PURPOSE FEEDER MAINTENANCE .................... 129
APPENDIX G HIGH CAPACITY SECOND PAPER FEEDER .................. 145
APPENDIX H NETWORK INTERFACE (OPTION) ................................... 163

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1. CONFIGURATION
1.1 System Configuration
B4600 consists of control and engine blocks in the standard configuration, as shown in Figure 1-1.
In addition, the options marked with asterisk(*) are available.
Figure 1-1
Operator Panel
LCD : 1
LED : 1
SW : 8
Drum Motor
Paper
Cassette
ID
Unit
Paper Feeding
Mechanism
(First Tray Unit)
Registration
Motor
Hopping Clutch
LED Head
Electrophotogarphic
Processing Unit
Fuser Unit
Halogen-Lamp
High Voltage /
Sensor Board
ROM DIMM
*
High Capacity
Second Paper
Feeder
*
Multi Purpose
Feeder
IEEE1284
USB
Network
RS232C
*
Network
Board
OR
*
RS232C
Board
** : Optional
AC
INPUT
Power Supply
Board
Face Down
Stacker
FAN
RAM
DIMM
*
Main Control Board

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1.2 Printer Configuration
The printer unit consists of the following hardware components:
• Electrophotographic Processor
• Paper Feeder
• Controller
• Operator Panel
• Power Supply Unit
The printer unit configuration is shown in Figure 1-2.
Figure 1-2
Upper cover
Operator panel assy
Stacker assy
Optional board
Legal/universal paper cassette
Image drum unit(Type 10)
(consumable)
Toner-cartridge(Type 10)
(consumable)
Power supply
High Voltage / Sensor board
Main control board

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1.3 Optional Configuration
The options shown below are available for use with B4600. These are available separately from the
printer unit.
(1) High Capacity Second Paper Feeder
(2) Multi Purpose Feeder
(3) RS-232C Serial Interface Board

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(5) SDRAM DIMM
(6) Flash DIMM
(4) Network Interface Board(Soft NIC CARD)
(7) Postscript 3 Emulation DIMM
(i) 16MB (ii) 32MB (iii) 64MB
(iv) 128MB (v) 256MB
(i) 1MB (ii) 8MB (iii) 16MB

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1.4 Specification
(1) Type Desktop
(2) External dimensions Height 8.5”(215 mm)
Width 14.0”(355 mm)
Depth 15.7”(400 mm)
(3) Weight Approx. 9 kg
(4) Developing method Dry electrophotography
Exposing method LED stationary head
(5) Paper used <Type>
•Standard paper
–Xerox 4200 (20 lbs)
•Application paper (manual face-up feed)
–Label
–Envelope
–OHP paper (transparency)
<Size>
•Standard sizes
–Letter
–Legal* [* Without Multi Purpose Feeder (Option)]
–Legal-13*
–Executive
–COM-9 **
–COM-10** [** manual feed and Multi Purpose Feeder
–Monarch** (option) only]
–DL**
–C5**
–A4
–A5
–B5 (JIS)
–A6
–Statement*** [***Without high capacity second paper feeder
(option)]
•Applicable sizes
–Width : 3.5”to 8.5”(90 to 216 mm)
–Length : 5.8”to 14”(148 to 355.6 mm)
<Thickness>
–Automatic feed : 16 to 28 lbs (60 to 105 g/m2)
–Manual feed : Label, OHP paper (transparency)
Envelope (24 to 28 lbs)
(6) Printing speed Continuous printing : 27 pages per minute with Letter size paper.
26 pages per minute with A4 size paper.
[Except, Multi purpose Feeder (13ppm) with
Letter size paper]
Warm-up time : 25 seconds typical at room temperature
[77˚F (25˚C), AC 120/230 V].
First page print time : 5.0 seconds typical for the Letter size paper
(5.1 seconds for the A4 size) after warm-up.
(7) Paper feeding method Automatic feed or manual feed
(8) Paper delivery method Face down/face up
(9) Resolution 600 ×600 dots/inch
600 ×1200 dots/inch
600 × 2400 dots/inch (Print speed is half speed)