Oki OKIPAGE 14ex User manual

41356901TH Rev.2 1 / 196
OKIPAGE14ex
LED Page Printer
Maintenance Manual
Rev.2 2001-03-19
ODA / OEL / INT

41356901TH Rev.2 2 /
Rev.No. Date No.
Corrected items
Page Description of change Person in
charge
Document Revision History
1 2000-09-21 ISSUE EMP Ono
2 2001-03-19 NP39 H Ono

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PREFACE
This Maintenance Manual describes the field maintenance methods for 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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CONTENTS
1. CONFIGURATION.................................................................................................. 7
1.1 System Configuration ..................................................................................... 7
1.2 Printer Configuration....................................................................................... 9
1.3 Optional Configuration.................................................................................... 10
1.4 Specification ................................................................................................... 12
1.5 Safety Standards ............................................................................................ 14
1.5.1 Certification Label................................................................................................... 14
1.5.2 Warning Label ........................................................................................................ 14
1.5.3 Warning/Caution Marking....................................................................................... 15
2. OPERATION DESCRIPTION ................................................................................. 16
2.1 Main Control Board......................................................................................... 18
2.2 Power Supply/Sensor Board........................................................................... 19
2.3 Electrophotographic Process.......................................................................... 21
2.3.1 Electrophotographic Process Mechanism .............................................................. 21
2.3.2 Electrophotographic Process ................................................................................. 24
2.3.3 Process Operation Descriptions............................................................................. 27
2.3.4 Revision of LED Head Illumination......................................................................... 37
2.4 Paper Jam Detection ...................................................................................... 38
2.5 Cover Open .................................................................................................... 40
2.6 Toner Low Detection....................................................................................... 41
3. PARTS REPLACEMENT........................................................................................ 43
3.1 Precautions for Parts Replacement................................................................ 43
3.2 Parts Layout.................................................................................................... 45
3.3 How to Change Parts...................................................................................... 48
3.3.1 Upper Cover Assy .................................................................................................. 49
3.3.2 LED Head............................................................................................................... 50
3.3.3 Operator Panel Assy .............................................................................................. 51
3.3.4 Lower Base Unit ..................................................................................................... 52
3.3.5 Pulse Motor (Main/Drum) ....................................................................................... 53
3.3.6 Pulse Motor (Registration)...................................................................................... 54
3.3.7 Face Up Stacker Assy............................................................................................ 55
3.3.8 Eject Roller Assy .................................................................................................... 56
3.3.9 Motor Assy ............................................................................................................. 57
3.3.10 Hopping Roller Shaft Assy ..................................................................................... 58
3.3.11 Stacker Cover Assy................................................................................................ 59
3.3.12 Registration Roller .................................................................................................. 60
3.3.13 Roller Transfer Assy............................................................................................... 61
3.3.14 Fusing Unit ............................................................................................................. 62
3.3.15 Back-up Roller........................................................................................................ 63
3.3.16 Sensor Plate (Inlet)................................................................................................. 64
3.3.17 Sensor Plate (Outlet), Sensor Wire Assy ............................................................... 65
3.3.18 Manual Feed Guide Assy ....................................................................................... 66
3.3.19 Sensor Plate (Paper Supply).................................................................................. 67
3.3.20 M7E-PCB ............................................................................................................... 68
3.3.21 Power Supply/Sensor Board, High Voltage Unit and Contact Assy ....................... 69
3.3.22 Cassette Guide L Assy........................................................................................... 70
3.3.23 Cassette Guide R Assy .......................................................................................... 71
3.3.24 Spacer Bearing (L/R).............................................................................................. 72

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4. ADJUSTMENT........................................................................................................ 73
4.1 Maintenance Modes and Functions................................................................ 73
4.1.1 User Maintenance Mode ........................................................................................ 73
4.1.2 System Maintenance Mode.................................................................................... 73
4.1.3 Engine Maintenance Mode..................................................................................... 74
4.1.4 EEPROM initialization ............................................................................................ 75
4.2 Adjustment When Replacing a Part................................................................ 76
4.2.1 Uploading/Downloading EEPROM data................................................................. 76
5. PERIODICAL MAINTENANCE .............................................................................. 77
5.1 Periodical Replacement Parts ........................................................................ 77
5.2 Cleaning.......................................................................................................... 77
5.2.1 Cleaning of LED Lens Array ................................................................................... 77
5.2.2 Cleaning Page Function ......................................................................................... 79
6. TROUBLESHOOTING PROCEDURES ................................................................. 80
6.1 Troubleshooting Tips ...................................................................................... 80
6.2 Points to Check before Correcting Image Problems....................................... 80
6.3 Tips for Correcting Image Problems............................................................... 80
6.4 Preparation for Troubleshooting ..................................................................... 81
6.5 Troubleshooting Flow ..................................................................................... 82
6.5.1 LCD Status Message/Problem List ........................................................................ 82
6.5.2 LCD Message Troubleshooting.............................................................................. 92
7. WIRING DIAGRAM................................................................................................ 112
7.1 Interconnect Signal Diagram .......................................................................... 112
7.2 PCB Layout and Connector Signal List .......................................................... 113
7.3 Resistance Check........................................................................................... 123
8. PARTS LIST ........................................................................................................... 125
APPENDIX A RS-232C SERIAL INTERFACE (OPTION) ........................................... 132
APPENDIX B CENTRONICS PARALLEL INTERFACE.............................................. 137
APPENDIX C UNIVERSAL SERIAL BUS (USB)......................................................... 143
APPENDIX D LOOP TEST (RS-232C INTERFACE) ................................................... 147
APPENDIX E DIAGNOSTICS TEST ............................................................................ 148
APPENDIX F MULTI PURPOSE FEEDER MAINTENANCE..................................... 157
1. OUTLINE ........................................................................................................ 157
1.1 Functions................................................................................................................ 157
1.2 External View and Component Names .................................................................. 157
2. MECHANISM DESCRIPTION ........................................................................ 158
2.1 General Mechanism ............................................................................................... 158
2.2 Hopper Mechanism ................................................................................................ 158

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3. PARTS REPLACEMENT................................................................................ 159
3.1 Precautions Concerning Parts Replacement ......................................................... 159
3.2 Parts Layout ........................................................................................................... 161
3.3 Parts Replacement Methods .................................................................................. 162
3.3.1 Link........................................................................................................... 163
3.3.2 Separator ................................................................................................. 164
3.3.3 OLEV-11-PCB.......................................................................................... 165
3.3.4 Pulse Motor .............................................................................................. 166
3.3.5 Planet Gear .............................................................................................. 167
3.3.6 Roller-A and B.......................................................................................... 168
4. TROUBLESHOOTING.................................................................................... 169
4.1 Precautions Prior to the Troubleshooting ............................................................... 169
4.2 Preparations for the Troubleshooting ..................................................................... 169
4.3 Troubleshooting Method......................................................................................... 170
4.3.1 LCD Status Message List......................................................................... 170
5. CONNECTION DIAGRAM.............................................................................. 172
5.1 Interconnection Diagram ........................................................................................ 172
5.2 PCB Layout ............................................................................................................ 173
6. PARTS LIST ................................................................................................... 174
APPENDIX G HIGH CAPACITY SECOND PAPER FEEDER ................................... 176
1. OUTLINE ........................................................................................................ 176
1.1 Functions................................................................................................................ 176
1.2 External View and Component Names .................................................................. 176
2. MECHANISM DESCRIPTION ........................................................................ 177
2.1 General Mechanism ............................................................................................... 177
2.2 Hopper Mechanism ................................................................................................ 177
3. PARTS REPLACEMENT................................................................................ 178
3.1 Precautions Concerning Parts Replacement ......................................................... 178
3.2 Parts Layout ........................................................................................................... 180
3.3 Parts Replacement Methods .................................................................................. 181
3.3.1 Stepping Motor (Hopping) ........................................................................ 182
3.3.2 TQSB-2 PCB............................................................................................ 184
3.3.3 Hopping Roller Shaft Assy and One-way Clutch Gear............................. 184
4. TROUBLESHOOTING.................................................................................... 185
4.1 Precautions Prior to the Troubleshooting ............................................................... 185
4.2 Preparations for the Troubleshooting ..................................................................... 185
4.3 Troubleshooting Method......................................................................................... 186
4.3.1 LCD Status Message List......................................................................... 186
5. CONNECTION DIAGRAM.............................................................................. 188
5.1 Interconnection Diagram ........................................................................................ 188
5.2 PCB Layout ............................................................................................................ 189
6. PARTS LIST ................................................................................................... 190

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1. CONFIGURATION
1.1 System Configuration
OKIPAGE 14ex 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.

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Figure 1-1
High Voltage Unit
and Sensor Board
Electrophotographic
Processing Unit
Fuser Unit
Paper Feeding Mechanism
(First Tray Unit)
RS-232C Serial*
Interface Board
1 DRAM SIMM Socket
1 Flash SIMM Socket
Main Control Board
Operator Panel
Paper
Cassette
Face
Down
Stacker
Engine Unit
* : Optional
*High Capacity
Second Paper
Feeder
*Multi Purpose
Feeder
Centronics
Face Up
Stacker
or
Flash SIMM*
(Flash memory)
DRAM SIMM*
RS-232C
Expansion Board
1 DRAM SIMM Socket
1 Flash SIMM Socket
USB
Power Supply AC

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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
Fusing unit
Power supply
High Voltage Unit/sensor board
Main control board
Legal/universal paper cassette
Image drum unit(Type 8)
(consumable)
Toner-cartridge(Type 5)
(consumable)

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(3) Expansion Board
1.3 Optional Configuration
TheoptionsshownbelowareavailableforusewithOKIPAGE14ex. Theseareavailableseparatelyfrom
the printer unit.
(1) High Capacity Second Paper Feeder
(2) Multi Purpose Feeder