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Page: 1
Service Guide OF1050/2350/2450
Chapter 0 About This Manual

OKIFAX 1050 // 2350 // 2450
FACSIMILE PRODUCTS

Adobe Acrobat printable reference
copy of the OKIDATA Service Training Manual.
09/17/97

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 view on most
displays well.

Copyright 1997, 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)
Table of Contents Page

Service Guide OF1050/2350/2450
0 About This Manual
Front Cover 1
Federal Communications Commission Requirements for End 2
Users
FCC Telephone Consumer Protection Act 3
Canadian Department of Communications Requirements for 4
End Users
Federal Communications Commission Radio Frequency 5
Statement
Canadian Department of Communications Radio Interference 6
Statement
1 General Information
1.1 General Performance 7
1.2 General User's Function 8
1.3 General Maintenance Functions 9
1.4 General Appearance 10
....Figure 1.4.2 OKIFAX 1050 Control Panel 11
....Figure 1.4.3 OKIFAX 2350 Control Panel 12
....Figure 1.4.4 OKIFAX 2450 Control Panel 13
1.5 Basic Performance Specifications 14
1.6 Reports and Lists 15
....Reports and Lists - Continued 16
........Telephone Directory for OKIFAX 1050 (1/2): (Example) 17
........Telephone Directory for OKIFAX 1050 (2/2): (Example) 18
........Telephone Directory for OKIFAX 2350 (1/4): (Example) 19
........Telephone Directory for OKIFAX 2350 (2/4): (Example) 20
........Telephone Directory for OKIFAX 2350 (3/4): (Example) 21
........Telephone Directory for OKIFAX 2350 (4/4): (Example) 22
........Telephone Directory for OKIFAX 2450 (1/6): (Example) 23
........Telephone Directory for OKIFAX 2450 (2/6): (Example) 24
........Telephone Directory for OKIFAX 2450 (3/6): (Example) 25
........Telephone Directory for OKIFAX 2450 (4/6): (Example) 26
........Telephone Directory for OKIFAX 2450 (5/6): (Example) 27
........Telephone Directory for OKIFAX 2450 (6/6): (Example) 28
....Reports and Lists - Continued 29
2 Setup Information
2A-Setup Information 30
2.2 Site Selection 31
2.3 Unpacking 32
2.4 Check of Contents 33
2.5 Installation of Attachments 34
....Toner cartridge 35
Table of Contents Page
....Recording paper 36
....Document stacker 37
2.6 AC Cord Connection 38
2.7 Telephone and Line Connections 39
2.8 Packing for Shipment 40
2B. Programming and Initial Settings 41
....2.9.2 Technical Functions 42
....2.9.2.02 TEL/FAX automatic switching 43
....2.9.2.03 TAD mode 44
........TEL/FAX mode flow chart 45
........TAD mode flow chart 46
........TAD mode flow chart 47
....2.9.3 Technical Functions Example 48
....2.9.3.02 Technical functions 49
........Table 2.9.2 (1/3) Technical Functions 50
........Table 2.9.2 (2/3) Technical Functions 51
........Table 2.9.2 (3/3) Technical Functions 52
....2.9.4 Users Functions 53
........Table 2.9.3 (1/6) Feature Specifications 54
........Table 2.9.3 (2/6) Feature Specifications 55
........Table 2.9.3 (3/6) Feature Specifications 56
........Table 2.9.3 (4/6) Feature Specifications 57
........Table 2.9.3 (5/6) Feature Specifications 58
........Table 2.9.3 (6/6) Feature Specifications 59
........Users Initial Settings 60
........Table 2.9.4 (1/3) One-touch key Program Settings 61
........Table 2.9.4 (2/3) One-touch key Program Settings 62
........Table 2.9.4 (3/3) One-touch key Program Settings 63
........Table 2.9.4 User Function Program Settings 64
....2.9.5 User's Functions Example 65
........Table 2.9.5 User's Functions 66
........2.9.5.02 Ring response time 67
........2.9.5.03 Dial parameters (In case the service bit is "OFF".) 68
....2.9.6 Clock Adjustment 69
....2.9.7 Dual Access Operation (for OKIFAX 2350/2450) 70
....2.9.8 System Data Programming 71
....2.9.9 One-Touch Key Programming 72
....2.9.10 Two-digit Auto Dial Programming 73
....2.9.11 Group setting 74
....2.9.12 Dial Parameters Settings 75
........2.9.12.02 Procedure 76
........Table 2.9.6 Dial Parameters Settings 77
....2.9.13 Programming Mail Box Password 78
....2.9.14 Memory Operations 79
Table of Contents Page
........2.9.14.02 CONF. RX MSG. PRINT 80
....2.9.15 Off-line Tests 81
....2.9.16 On-line Tests 82
........2.9.16.02 Reception 83
............Fig. 2.9.5 Typical Transmission Flow 84
............Fig. 2.9.6 Typical Reception Flow 85
2C. Installation of Optional Units 86
....2.10.02 Procedure 87
........Installation of the memory board 88
........Installation of PCIU (PC interface) board 89
3 Board Description/Printer Operation
Section 1: Board Description - 3.1 Unit Configuration and Block 90
Diagram
....3.1.02 The unit configuration of the OKIFAX 2350/2450 is as 91
follows:
3.2 Overall Dimension and Mechanical Structure of OKIFAX 92
1050
3.3 Overall Dimension and Mechanical Structure of OKIFAX 93
2350/2450
3.4 Boards and Units 94
3.5 Function of Each Board 95
....3.5.02 Operation panel unit: YOPE (OKIFAX 1050)/YOPE-2 96
(OKIFAX 2350/2450) board
....3.5.03 NCUU board 97
....3.5.04 Power supply unit: FXVE (120V)/FXVH (230V) board 98
....3.5.05 MEMO (memory) board (Option) 99
....3.5.06 P050 board (Optional PC Interface) 100
....3.5.07 HOOK board (Optional handset) 101
....3.5.08 TELU board (Option): For US and Canada 102
....3.5.09 TQSB board (installed within second paper cassette 103
option)
........OKIFAX 1050 Block Diagram 104
........Figure 3.5.2 OKIFAX 2350/2450 Block Diagram 105
3.6 Explanation of Signal Flow for OKIFAX 1050/2350/2450 106
....3.7 Signal Flow by Mode of operation (OKIFAX 1050) 107
....Okifax 1050 300 bps Send Signal 108
....Okifax 1050 300 bps Receive Signal 109
....Okifax 1050 G3 Send Picture Signal 110
....Okifax 1050 G3 Receive Picture Signal 111
....Okifax 1050 Report Print Signal 112
3.8 Signal Flow by Mode of Operation (OKIFAX 2350/2450) 113
....Okifax 2350/2450 300 bps Send 114
....Okifax 2350/2450 300 bps Receive Signal 115
....Okifax 2350/2450 G3 Send Picture Signal 116
Table of Contents Page
....Okifax 2350/2450 G3 Receive Picture Signal 117
....Okifax 2350/2450 Report Print Signal 118
3.9 Power Supply Unit 119
....General functional description 120
....3.9.02 Power Supply Unit (FXVE/FXVH) 121
....3.9.03 FXVE (for 120 V)/FXVH (for 230 V) Circuit Diagram 122
(2/2)
3.10 NCU Board 123
3.11 TELU Circuit Diagram (option) 124
....Block Diagram of TEL-U (option) 125
....Relationship between NCUU and TEL-U 126
3.12 MEMO (memory) Circuit Diagram (option) 127
3.13 P050 (PC interface unit) Circuit Diagram (option) 128
3.14 TQSB (Second tray) Circuit Diagram: option 129
Section 2: Print Operation - 3.15 Mechanical Components 130
....Layout of Print Station Components 131
3.16 Process Operations 132
....3.16.02 Charging 133
....3.16.03 Exposure 134
....3.16.4 Developing 135
....3.16.05 Transfer 136
....3.16.06 Fusing 137
....3.16.07 Cleaning 138
....3.16.08 Cleaning of rollers 139
3.17 Actual Electo-photographic Process 140
3.18 Errors List 141
3.19 Major Trouble Errors 142
3.20 Cleaning 143
3.21 Sensors and Switches 144
....3.21.02. Sensors and switch control 145
4 Mechanical Disassembly and Reassembly
4.1 General 146
....4.1.2 Tools 147
4.2 How to Disassemble and Reassemble 148
....4.2.1 LED Print Head 149
....4.2.2 Image Drum, Rear Cover, NCU Cover, Main Cover, 150
Separation Plate, NCU Board, Modem Board
....4.2.3 Control Panel Assembly, Paper Guide (U) Assembly. 151
....4.2.4 Sub-roller, ADF Roller Assembly, Pinch Roller, Contact 152
Image Sensor, Document Detectors (PC1 and PC2).
....4.2.5 Registration Stepper Motor, Main Stepper Motor, 153
release Guide Assembly, Eject Roller Assembly, Manual Guide
Assembly (only for OKIFAX 2350/2450), Stack Cover, Fusing
Unit
Table of Contents Page
....4.2.6 Lower Base, Motor Assembly, Back-up Roller, Transfer 154
Roller, Reset Levers
....4.2.7 Registration Roller, Hopping Roller, Sensor Plates 155
....4.2.8 MCNT Board, Power Supply Unit, Contact Assembly, 156
Transformer
5 Adjustments
5.1 Setting of LED Print Head Drive Time 157
5.2 Power Voltage (Confirmation) 158
5.3 Contact Image Sensor Output Check (Confirmation) 159
6 Cleaning and Maintenance
6.1 Replacement of Consumable Parts 160
6.2 Preventative Maintenance 161
6.3 Printer Counter Display/Clear 162
6.4 Printer Counter Display/Clear 163
6.5 Self-diagnosis Test 164
6.6 Sensor Calibration Test 165
6.7 LED Test 166
6.8 Tone Send Test 167
6.9 High-speed Modem Send Test 168
6.10 High-speed Modem Receive Test 169
6.11 MF Send Test 170
6.12 Tone (TEL/FAX) 171
6.13 Printer Cleaning 172
6.14 Protocol Dump Data Printing 173
....6.14.02 Procedure 174
....6.14.03 Dump data description 175
....6.14.04 Analysis from the data 176
....6.14.05 FCF (Facsimile Control Field) conversion table 177
6.15 System Reset 178
6.16 Service Code 179
7 Troubleshooting and Repair
General 180
7.1 Overall Troubleshooting Flow Chart 181
7.2 No LCD Operation 182
7.3 ALARM LED ON 183
7.4 Printing Test Failure 184
7.5 No Local Copy 185
7.6 Auto Dial Failure 186
7.7 Transmission Problem 187
7.8 Auto Reception Failure 188
7.9 Reception Problem 189
7.10 Scan Calibration Test Failure 190
7.11 LED Test 191
7.12 Tone Send Test 192
Table of Contents Page
7.13 High-speed Modem Test 193
7.14 MF Send Test 194
7.15 Tone (TEL/FAX) Send Test 195
7.16 No Acoustic Line Monitor 196
7.17 Power Supply Unit 197
7.18 No Document Feeding 198
7.19 Multiple Document Feeding 199
7.20 Document Skew 200
7.21 Document Jam 201
7.22 Printer Unit 202
....7.22.2 Troubleshooting Flow Chart of Printer Unit 203
........Troubleshooting flow chart 1: 204
........Troubleshooting flow chart 2: 205
........Troubleshooting flow chart 3: 206
........Troubleshooting flow chart 4: 207
........Troubleshooting flow chart 5: 208
........Troubleshooting flow chart 6: 209
........Troubleshooting flow chart 7: 210
........Troubleshooting flow chart 8: 211
........Troubleshooting flow chart 9: 212
........Troubleshooting flow chart 10: 213
........Troubleshooting flow chart 11: 214
........Troubleshooting flow chart 12: 215
........Troubleshooting flow chart 13: 216
........Troubleshooting flow chart 14: Troubleshooting flow chart 217
15:
8 Drawings and Parts List
ASSEMBLY - OKIFAX 1050 218
ASSEMBLY - OKIFAX 2350/2450 219
SECTION 1 CABINET ASSEMBLY - OKIFAX 1050 220
SECTION 1 CABINET ASSEMBLY - OKIFAX 2350/2450 221
SECTION 2 CONTROL ASSEMBLY - OKIFAX 1050 222
SECTION 2 CONTROL ASSEMBLY - OKIFAX 2350 223
SECTION 2 CONTROL ASSEMBLY - OKIFAX 2450 224
SECTION 3 PRINTER ASSEMBLY - OKIFAX 2350/2450 225
SECTION 3 PRINTER ASSEMBLY - OKIFAX 1050 226
SECTION 4 BASE ASSEMBLY - OKIFAX 1050 227
SECTION 4 BASE ASSEMBLY - OKIFAX 2350/2450 228
SECTION 5 SCAN UNIT - OKIFAX 1050/2350/2450 229
SECTION 6 PAPER ASSEMBLY - OKIFAX 1050/2350/2450 230
SECTION 7 CABLES - OKIFAX 1050 231
SECTION 7 CABLES - OKIFAX 2350/2450 232
Section 8: Packaging 233
9 High Capacity Second Paper Feeder Maintenance
Table of Contents Page
PREFACE 234
9.1 Outline 235
9.2 Mechanism Description 236
9.3 PARTS REPLACEMENT 237
....9.3.2 Parts Layout 238
....9.3.3 Parts Replacement Methods 239
........9.3.3.1. Pulse Motor (Hopping) 240
........9.3.3.2. TQSB-PCB 241
9.4 Troubleshooting 242
9.5 Connection Diagram 243
....9.5.2 PCB Layout 244
9.6 Parts List 245
Page: 2
Service Guide OF1050/2350/2450
Chapter 0 About This Manual

Federal Communications Commission Requirements for End Users

This device has been granted a registration number by the Federal Communications Commission, under
Part 68 rules and regulations for direct connection to the telephone lines. In order to comply with these
FCC rules, the following instructions must be carefully read and applicable portions followed completely.

1. This equipment complies with Part 68 of FCC rules. On the bottom of the equipment is a label that
contains, among other information, the FCC registration number and ringer equivalence number (REN) for
this equipment. If requested, this information must be provided to the telephone company.

2. The following USOC jacks may be used with this equipment: RJ11C.

3. The REN is used to determine the quantity of devices which may be connected to the telephone line.
Excessive RENs on the telephone line may result in the devices not ringing in response to an emergency
call. In most, but not all areas, the sum of the RENs should not exceed five (5.0). To be certain of the
number of devices that may be connected to the line, as determined by the total RENs, contact the
tele-phone company to determine the maximum REN for your calling area.

4. If the equipment causes harm to the telephone network, the telephone company will notify you in
advance. But if advance notice isn't practical, the telephone company will notify the customer as soon as
possible. Also, you will be advised of your right to file a complaint with the FCC if you believe it is
necessary.

5. The telephone company may make changes in its facilities, equipment, operations, or procedures that
could affect the operation of the equipment. If this happens, the telephone company will provide advance
notice in order for you to make the necessary modifications to maintain uninterrupted service.

6. If trouble is experienced with this equipment, please contact the following for repair and/or warranty
information:

OKIDATA 532 Fellowship Rd. Mount Laurel, NJ 08054-3405 Telephone: (609) 235-2600 or
1-(800)-OKIDATA

If the trouble is causing harm to the telephone network, the telephone company may request that you
remove the equipment from the network until the problem is resolved.

7. This equipment contains no user serviceable parts. Please contact OKIDATA for service.

8. This equipment cannot be used on public coin service provided by the telephone company. Connection
to Party Line Service is subject to state tariffs. Contact your state Public Utility Commission, Public Service
Commission, or Corporate Commission for information.

9. This equipment is hearing-aid compatible.

Copyright 1997, 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 OF1050/2350/2450
Chapter 0 About This Manual

FCC Telephone Consumer Protection Act

The Federal Communications Commission Telephone Consumer Protection Act of 1991 makes it unlawful
for any person to use a computer or other electronic device to send any message via a telephone fax
machine unless such message clearly contains, in a margin at the top or bottom of each transmitted page
or on the first page of the transmission, the date and time it is sent and an identification of the business or
other entity, or other individual sending the message, and the telephone number of the sending machine
or such business, other entity, or individual.

To comply with this law, you must enter the following information in your fax unit: