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Service Guide OKIPAGE 18/18n
Chapter 0 Introduction
Front Cover
Oki Data
Service Guide
OKIPAGE 18 and 18n
Adobe Acrobat printable reference copy
of the OKIDATA Service Training Manual.
01/26/2000
Note: This Adobe Acrobat version of the Okidata Service Training Manual was built with the pictures
rendered at 300 dpi, which is ideal for printing, but does not display well on most displays.

Table of Contents Page
Service Guide OKIPAGE 18/18n
0 Introduction
Preface 1
1 Configuration
Configuration 2
....1.1 System Configuration 3
....1.2 Printer Configuration 4
....1.3 Optional Configuration 5
....1.4 Specification 6
....1.5 Safety Standards 7
........1.5.1 Certification Label 8
........1.5.2 Warning Label 9
2 Operation Description
2.0 Operation Description 10
2.1 Main Control Board (BOARD-FFF) 11
2.2 Power Supply Unit 12
2.3 Electro-photographic Process 13
....2.3.1 Electro-photographic process mechanism 14
....2.3.2 Electro-Photographic process 15
....2.3.3 Process operation descriptions 16
....2.3.4 Revision of LED Head Illumination 17
2.4 Paper Jam Detection 18
2.5 Cover Open 19
2.6 Toner Low Detection 20
2.7 Stacker-full Detection 21
2.8 Page Size Detection 22
3 Parts Replacement
Parts Replacements 23
....3.1 Precautions for Parts Replacement 24
....3.2 Parts Layout 25
........Figure 3-1 26
........Figure 3-2 27
........Figure 3-3 28
....3.3 How to Change Parts 29
........3.3.1 Face-up Stacker Assy 30
........3.3.2 Contact Assy 31
........3.3.3 DC Fan Motor 32
........3.3.4 OP Panel Assy 33
........3.3.5 Board - FFF 34
........3.3.6 Stacker Assy, Damper Arm, Cover Rear 35
........3.3.7 Sensor Stacker Full 36
........3.3.8 Cable cover (guide film) 37
........3.3.9 Damper 38
........3.3.10 Feeder Unit - Front 39
........3.3.11 Roller Assy - Regist 40
........3.3.12 Motor - Main 41
........3.3.13 Guide Assy - Eject 42
........3.3.14 Heat Assy 43
........3.3.15 Roller feed (C) 44
........3.3.16 Roller Assy - BK 45
........3.3.17 Roller Assy - Feed 46

Table of Contents Page
........3.3.18 LED Head 47
........3.3.19 Paper cassette, ROLLER Assy - Feed, ROLLER
Assy - Hopping 48
........3.3.20 Frame Assy - Separation 49
........3.3.21 Transfer Roller / TR Gear / TR Bearing 50
........3.3.22 EP lock shaft 51
........3.3.23 LEVER Assy - Out Sensor 52
........3.3.24 Toner sensor lever 53
........3.3.25 Paper sensor lever 54
........3.3.26 Inlet sensor lever 55
........3.3.27 Power supply unit 56
........3.3.28 Lever-Paper end & Lever-Paper near end 57
........3.3.29 Guide Assy - Cassette (L) 58
........3.3.30 Guide Assy - Cassette (R) 59
4 Adjustment
4.0 Adjustment 60
....4.1 Maintenance Modes and Functions 61
........4.1.1 User maintenance mode 62
........4.1.2 System maintenance mode 63
........4.1.3 Engine maintenance mode 64
........4.1.4 EEPROM initialization 65
....4.2 Adjustment When Replacing a Part 66
........4.2.1 Setting LED Head Drive Time 67
........4.2.2 Destination setting 68
........4.2.3 Setting of LED head drive time 69
5 Periodical Maintenance
5.1 Periodic Maintenance 70
5.2 Cleaning 71
....5.2.1 Cleaning the LED Lens Array 72
....5.2.2 Cleaning the Plastic Film 73
6 Troubleshooting Procedures
6.1 Troubleshooting Tips 74
6.2 Check Points Before Correcting Image Problems 75
6.3 Notes When Correcting Image Problems 76
6.4 Preparation Before Troubleshooting 77
6.5 Troubleshooting Flowchart 78
....6.5.1 Status Monitor Message List 79
....6.5.2 LCD message troubleshooting 80
........(1) The printer does not work normally after being turned
on. 81
........(2) Paper jams 82
............(2)-1 Paper input jam (1st tray) 83
............(2)-2 Paper input jam (front feeder) 84
............(2)-3 Paper feed jam 85
............(2)-4 Paper exit jam 86
........(3) Paper size error 87
........(4) Fuser unit error (ERROR 71), (ERROR 72), (ERROR
73) 88
........(5) I/F time-out between printer and optional tray (ERROR
81) 89
........(6) I/F time-out between printer and Duplex Unit (ERROR
83) 90

Table of Contents Page
........(7) I/F time-out occurs between the printer and the
operator panel (ERROR 80) 91
........(8) Message cannot be received through the parallel
interface 92
........(9) Message cannot be received through the serial
interface 93
........(10) Data cannot be received through the OKI HSP
interface 94
........(11) Synchronous serial I/O error (ERROR 74) 95
....6.5.3 Image Troubleshooting 96
........(1) An image is light or blurred entirely 97
........(2) Dark background density 98
........(3) Black paper is output 99
........(4) Black belts or stripes in the vertical direction 100
........(5) Cyclic error 101
........(6) Print voids 102
........(7) Poor fusing 103
........(8) White belts or streaks in the vertical direction 104
........(9) Snowy print of high density pattern 105
........(10) Blotchy faded print 106
........Contents - Figure 6-5 107
........Contents - Figure 6-6 108
7 Wiring Diagram
7.1 Interconnect Signal Diagram 109
7.2 PCB Layout 110
....7.2.1 Main Control Board (HBY PCB) 111
....7.2.2 Power Supply Board (120V/230V) 112
....7.2.3 Power supply board (High voltage) 113
....7.2.4 Flash ROM module (BOARD-FSL or BOARD-FSL-2) 114
7.3 Resistance Check 115
7.4 Program Font/ROM Location 116
8 Parts List
Figure 8-1 Printer Unit 117
Figure 8-2 Frame - Main Unit 118
Figure 8-3 Base Unit 119
A Centronics Parallel Interface
Parallel Interface 120
B RS-232C Serial Interface
RS-232C Serial Interface 121
C Duplex Unit Maintenance (option)
1. OUTLINE 122
....1.1 Functions 123
....1.2 External View and Component Names 124
2.0 Mechanism Description 125
....2.1 General Mechanism 126
....2.2 JAM Release Mechanism 127
....2.3 Removing/Installing Duplex Unit 128
3.0 Parts Replacement 129
....3.1 Precautions Concerning Parts Replacement 130
....3.2 Parts Layout 131
....3.3 Parts Replacement Methods 132

Table of Contents Page
........3.3.1 Board-LEX 133
........3.3.2 Connector (IMSA-9714N-14A) 134
........3.3.3 Photo Sensor 135
........3.3.4 SOLENOID Assy 136
........3.3.5 Motor 137
4.0 Troubleshooting 138
....4.1 Precautions Prior to the Troubleshooting 139
....4.2 Preparations for the Troubleshooting 140
....4.3 Troubleshooting Method 141
........4.3.1 LCD Status Message List 142
........4.3.2 Troubleshooting Flow 143
5.0 Connection Diagram 144
....5.1 Interconnection Diagram 145
....5.2 PCB Layout 146
6.0 Parts List 147
Table 6-1 Duplex Unit 148
D Second / Third Paper Feeder Maint (option)
1.0 Outline 149
....1.1 Functions 150
....Appearance and Parts Name 151
2.0 Description of operation 152
....2.1 Driving Mechanism 153
....2.2 Hopper Mechanism 154
3.0 Parts Replacement 155
....3.1 Precautions Concerning Parts Replacement 156
....3.2 Parts Layout 157
....3.3 Parts Replacement Methods 158
........3.3.1 Roller assy hopping, Roller assy feed 159
........3.3.2 Cover front assy 160
........3.3.3 Board-BBB 161
........3.3.4 Lever paper end, Lever paper near end 162
........3.3.5 Motor 163
........3.3.6 Connector (IMSA-9714N-14B), Connector
(IMSA-9714N-14A) 164
........3.3.7 Frange pulley, pulley Idle, Mini pitch belt, Plate Earth
shaft, Gear double, Tray switch assy 165
........3.3.8 Roller feed 166
........3.3.9 Bracket sub roller 167
........3.3.10 Frame side (L) assy 168
........3.3.11 Frame side (R) assy 169
4.0 Troubleshooting 170
....4.1 Precautions Prior to the Troubleshooting 171
....4.2 Preparations for the Troubleshooting 172
....4.3 Troubleshooting Method 173
........4.3.1 LCD Status Message List 174
........4.3.2 Troubleshooting Flow 175
5.0 Connection Diagram 176
....5.1 Interconnection Diagram 177
....5.2 PCB Layout 178
6.0 Parts List 179
E Multi-Purpose Feeder Maintenance

Table of Contents Page
1.0 Outline 180
....1.1 Functions 181
....1.2 External View and Component Names 182
2.0 Mechanism Description 183
....2.1 General Mechanism 184
....2.2 Hopper Mechanism 185
3.0 Parts Replacement 186
....3.1 Precautions Concerning Parts Replacement 187
....3.2 Parts Layout 188
....3.3 Parts Replacement Methods 189
........3.3.1 Separator 190
........3.3.2 AOLE-PCB 191
........3.3.3 Square-shaped connector 192
........3.3.4 Hopping Motor 193
........3.3.5 Planet gear 194
........3.3.6 Roller B 195
........3.3.7 Roller A 196
........3.3.8 Mini pitch belt & Feed roller 197
4.0 Troubleshooting 198
....4.1 Precautions Prior to the Troubleshooting 199
....4.2 Preparations for the Troubleshooting 200
....4.3 Troubleshooting Method 201
........4.3.1 LCD Status Message List 202
........4.3.2 Troubleshooting Flow 203
5.0 Connection Diagram 204
....5.1 Interconnection Diagram 205
....5.2 PCB Layout 206
6.0 Parts List 207

Page: 1
Service Guide OKIPAGE 18/18n
Chapter 0 Introduction
Preface
This maintenance manual describes the field maintenance methods for OKIPAGE 18.
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.
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner
Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Page: 2
Service Guide OKIPAGE 18/18n
Chapter 1 Configuration
Configuration
System Configuration
Printer Configuration
Optional Configuration
Specification
Safety Standards
Copyright 1998, Okidata, Division of OKI America, Inc. All rights reserved. See the OKIDATA Business Partner
Exchange (BPX) for any updates to this material. (http://bpx.okidata.com)

Page: 3
Service Guide OKIPAGE 18/18n
Chapter 1 Configuration
1.1 System Configuration
The OKIPAGE 18 consists of control and engine blocks as the standard configuration (See Figure 1-1).
In addition, the following options are also available.