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OKIPAGE18 / OKIPAGE20Plus
LED Page Printer
Maintenance Manual

ODA/ OEL/ INT

1999.5.31 Rev. 1

40931201TH Rev. 1 1 / 245
PREFACE

This maintenance manual describes the field maintenance methods for OKIPAGE18/OKIPAGE20Plus.

This manual is written for use by maintenance personnel. Note, however, that the user should refer to
the USER'S MANUAL for methods of handling and operating the equipment.

40931201TH Rev. 1 2/
CONTENTS
1. CONFIGURATION ....................................................................................... 7
1.1 System Configuration................................................................................................. 7
1.2 Printer Configuration .................................................................................................. 8
1.3 Optional Configuration ............................................................................................... 9
1.4 Specification ............................................................................................................... 11
1.5 Safety Standards ....................................................................................................... 13
1.5.1 Certification label .......................................................................................... 13
1.5.2 Warning label ................................................................................................ 13

2. OPERATION DESCRIPTION ...................................................................... 14
2.1 Main Control Board (BOARD-FFF) ............................................................................ 16
2.2 Power Supply Unit ..................................................................................................... 20
2.3 Electro-photographic Process .................................................................................... 22
2.3.1 Electro-photographic process mechanism ................................................... 22
2.3.2 Electro-photographic process ....................................................................... 24
2.4.3 Process operation descriptions .................................................................... 28
2.3.4 Revision of LED Head Illumination ............................................................... 38
2.4 Paper Jam Detection ................................................................................................. 46
2.5 Cover Open ................................................................................................................ 47
2.6 Toner Low Detection .................................................................................................. 48
2.7 Stacker-full Detection ................................................................................................. 50
2.8 Page Size Detection .................................................................................................. 50

3. PARTS REPLACEMENT ............................................................................. 51
3.1 Precautions for Parts Replacement ........................................................................... 51
3.2 Parts Layout ............................................................................................................... 53
3.3 How to Change Parts ................................................................................................. 56
3.3.1 Face -up Stacker Assy ................................................................................. 57
3.3.2 Contact Assy ................................................................................................ 58
3.3.3 DC Fan Motor ............................................................................................... 59
3.3.4 OP Panel Assy ............................................................................................. 60
3.3.5 Board-FFF .................................................................................................... 61
3.3.6 Stacker Assy, Damper Arm, Cover Rear ..................................................... 62
3.3.7 Sensor Stacker Full ...................................................................................... 63
3.3.8 Cable cover (guide film) ................................................................................ 64
3.3.9 Damper ......................................................................................................... 65
3.3.10 Feeder Unit-Front ......................................................................................... 66
3.3.11 Roller Assy-Regist ....................................................................................... 67
3.3.12 Motor -Main .................................................................................................. 68
3.3.13 Guide Assy-Eject .......................................................................................... 70
3.3.14 Heat Assy ..................................................................................................... 71
3.3.15 Roller feed (C) ............................................................................................. 72
3.3.16 Roller Assy-BK ............................................................................................. 73
3.3.17 Roller Assy-Feed .......................................................................................... 74
3.3.18 LED Head ..................................................................................................... 75
3.3.19 Paper cassette, ROLLER Ass-Feed, ROLLER-Assy-Hoppibg ..................... 76
3.3.20 Frame Assy-Separation ................................................................................ 77
3.3.21 Transfer Roller/TR Gear/TR Bearing ............................................................ 78
3.3.22 EP lock shaft ................................................................................................. 79
3.3.23 LEVER Assy- Out Sensor ............................................................................. 80
3.3.24 Toner sensor lever ........................................................................................ 81
3.3.25 Paper sensor lever ....................................................................................... 82
3.3.26 Inlet sensor lever .......................................................................................... 83
3.3.27 Power supply unit ......................................................................................... 84

40931201TH Rev. 1 3/
3.3.28 Lever-Paper end & Lever-Paper near end ................................................... 85
3.3.29 Guide Assy-Cassette (L) .............................................................................. 87
3.3.30 Guide Assy-Cassette (R) .............................................................................. 88

4. ADJUSTMENT ............................................................................................. 90
4.1 Maintenance Modes And Functions ........................................................................... 90
4.1.1 User maintenance mode .............................................................................. 92
4.1.2 System maintenance mode .......................................................................... 96
4.1.3 Engine maintenance mode ........................................................................... 98
4.1.4 EEPROM initialization .................................................................................. 102
4.2 Adjustment When Replacing A Part ........................................................................... 103
4.2.1 Resetting the fuser counter .......................................................................... 104
4.2.2 Destination setting ........................................................................................ 105
4.2.3 Setting of LED head drive time ..................................................................... 106

5. PERIODIC MAINTENANCE ........................................................................ 109
5.1 Periodic Replacing Part ............................................................................................. 109
5.2 Cleaning ..................................................................................................................... 109
5.2.1 Cleaning of LED lens array ........................................................................... 109
5.2.2 Cleaning the Plastic Film .............................................................................. 110

6. TROUBLESHOOTING PROCEDURES ...................................................... 111
6.1 Troubleshooting Tips ................................................................................................. 111
6.2 Points to Check before Correcting Image Problems .................................................. 111
6.3 Tips for Correcting Image Problems .......................................................................... 111
6.4 Preparation for Troubleshooting ................................................................................ 112
6.5 Troubleshooting Flow................................................................................................. 112
6.5.1 LCD status message/trouble list ................................................................... 112
6.5.2 LCD message troubleshooting ..................................................................... 124
6.5.3 Image troubleshooting .................................................................................. 142

7. WIRING DIAGRAM ..................................................................................... 153
7.1 Interconnect Signal Diagram...................................................................................... 153
7.2 PCB Layout ................................................................................................................ 154
7.3 Resistance Check ...................................................................................................... 157
7.4 Program/Font ROM Location ..................................................................................... 159

8. PARTS LIST ................................................................................................ 161

40931201TH Rev. 1 4/
APPENDIX A CENTRONICS PARALLEL INTERFACE .................................... 169
APPENDIX B RS-232C SERIAL INTERFACE ................................................... 173
APPENDIX C DUPLEX UNIT MAINTENANCE .................................................. 175
1. OUTLINE ................................................................................................................... 175
1.1 Functions ...................................................................................................... 175
1.2 External View and Component Names ......................................................... 175
2. MECHANISM DESCRIPTION ................................................................................... 176
2.1 General Mechanicsm .................................................................................... 176
2.2 JAM Release Mechanism ............................................................................. 177
2.3 Removing/Installing Duplex Unit ................................................................... 178
3. PARTS REPLACEMENT ........................................................................................... 180
3.1 Precautions Concerning Parts Replacement ................................................ 180
3.2 Parts Layout ................................................................................................. 182
3.3 Parts Replacement Methods ........................................................................ 183
3.3.1 Board-LEX ....................................................................................... 184
3.3.2 Connector (IMSA-9714N-14A) ........................................................ 185
3.3.3 Photo Sensor .................................................................................. 186
3.3.4 SOLENOID Assy ............................................................................. 187
3.3.5 Motor ............................................................................................... 188
4. TROUBLESHOOTING ............................................................................................... 189
4.1 Precautions Prior to the Troubleshooting ..................................................... 189
4.2 Preparations for the Troubleshooting ........................................................... 189
4.3 Troubleshooting Method ............................................................................... 190
4.3.1 LCD Status Message List ................................................................ 190
4.3.2 Troubleshooting Flow ...................................................................... 191
5. CONNECTION DIAGRAM ......................................................................................... 194
5.1 Interconnection Diagram .............................................................................. 194
5.2 PCB Layout .................................................................................................. 195
6. PARTS LIST .............................................................................................................. 196

APPENDIX D SECOND/ THIRD PAPER FEEDER MAINTENANCE ................. 199
1. OUTLINE ................................................................................................................... 199
1.1 Functions ...................................................................................................... 199
1.2 Appearance and Parts Name ....................................................................... 199
2. Description of operartion ............................................................................................ 200
2.1 Driving Mechanism ....................................................................................... 200
2.2 Hopper Mechanism ...................................................................................... 202
3. PARTS REPLACEMENT ........................................................................................... 203
3.1 Precautions Concerning Parts Replacement ................................................ 203
3.2 Parts Layout ................................................................................................. 205
3.3 Parts Replacement Methods ........................................................................ 206
3.3.1 Roller assy hopping, Roller assy feed ............................................. 207
3.3.2 Cover front assy .............................................................................. 208
3.3.3 Board-BBB ...................................................................................... 209
3.3.4 Lever paper end, Lever paper near end .......................................... 210
3.3.5 Motor ............................................................................................... 211
3.3.6 Connector (IMSA-9714N-14B), Connector (IMSA-9714N-14A) ...... 212
3.3.7 Frange pulley, pulley Idle, Mini pitch belt,
Plate Earth shaft, Gear double, Tray switch assy .......... 213
3.3.8 Roller feed ....................................................................................... 214
3.3.9 Bracket sub roller ............................................................................ 215
3.3.10 Frame side (L) assy ........................................................................ 216
3.3.11 Frame side (R) assy ........................................................................ 217

40931201TH Rev. 1 5/
4. TROUBLESHOOTING ............................................................................................... 218
4.1 Precautions Prior to the Troubleshooting ..................................................... 218
4.2 Preparations for the Troubleshooting ........................................................... 218
4.3 Troubleshooting Method ............................................................................... 219
4.3.1 LCD Status Message List ................................................................ 219
4.3.2 Troubleshooting Flow ...................................................................... 220
5. CONNECTION DIAGRAM ......................................................................................... 221
5.1 Interconnection Diagram .............................................................................. 221
5.2 PCB Layout .................................................................................................. 222
6. PARTS LIST .............................................................................................................. 223

APPENDIX E MULTI FEEDER MAINTENANCE ................................................ 226
1. OUTLINE ................................................................................................................... 226
1.1 Functions ...................................................................................................... 226
1.2 External View and Component Names ......................................................... 226
2. MECHANISM DESCRIPTION ................................................................................... 227
2.1 General Mechanism ..................................................................................... 227
2.2 Hopper Mechanism ...................................................................................... 227
3. PARTS REPLACEMENT ........................................................................................... 228
3.1 Precautions Concerning Parts Replacement ................................................ 228
3.2 Parts Layout ................................................................................................. 230
3.3 Parts Replacement Methods ........................................................................ 231
3.3.1 Separator ........................................................................................ 232
3.3.2 AOLE-PCB ...................................................................................... 233
3.3.3 Square-shaped connector ............................................................... 234
3.3.4 Hopping Motor ................................................................................. 235
3.3.5 Planet gear ...................................................................................... 236
3.3.6 Roller B ........................................................................................... 237
3.3.7 Roller A ........................................................................................... 238
3.3.8 Mini pitch belt & Feed roller ............................................................. 239
4. TROUBLESHOOTING ............................................................................................... 240
4.1 Precautions Prior to the Troubleshooting ..................................................... 240
4.2 Preparations for the Troubleshooting ........................................................... 240
4.3 Troubleshooting Method ............................................................................... 240
4.3.1 LCD Status Message List ................................................................ 241
4.3.2 Troubleshooting Flow ...................................................................... 242
5. CONNECTION DIAGRAM ......................................................................................... 243
5.1 Interconnection Diagram .............................................................................. 243
5.2 PCB Layout .................................................................................................. 243
6. PARTS LIST .............................................................................................................. 244

40931201TH Rev. 1 6/
1. CONFIGURATION

1.1 System Configuration

OKIPAGE18 / OKIPAGE20Plus consists of control and engine blocks as the standard configu-
ration (See Figure 1-1.)
In addition, the following options are also available.

AC IN
Printer 120V
230V
Operator Face down Face up
panel stacker stacker

PC etc. Power Printer
Main control Mechanism
supply
unit
*
I/D unit
Centronics *
Parallel interface DC Fan Toner Cartridge
(Bidirection)

Front Feeder
RS-232C LED head
Serial I/F Motor-Main
Hopping motor

LAN etc. OKI HSP Paper tray
interface board
(Option) Paper size
detection switch

Extension D-RAM
SIMM
(Option)
High Capacity
Second Paper Multi Feeder
Feeder (Option)
(Option)

4MB/ 8MB High Capacity
Flash ROM SIMM Third Paper Duplex Unit
(Option) Feeder (Option)
(Option)
*: Consumables
: Paper feeding
: Singal flow : produced by third vender

Figure 1-1

40931201TH Rev. 1 7/
1.2 Printer Configuration

The printer unit consists of the following hardware components: