Appendix Iokifax 5750/5950 Troubleshooting Manual - Oki OKIFAX 5750 Maintenance Manual

Appendix I OKIFAX 5750/5950 TROUBLESHOOTING MANUAL
1. General
This manual shall be used to identify the failure cause when a failure of the board is detected
as a result of recovery through board replacement, etc. Therefore, the solder failure, pattern
failure, part mounting failure are excluded.
2. Tools
The following tools are recommended for board analysis:
(1) Oscillator:
(2) Soldering iron:
(3) Extension cable: See Extension cable list in Chapter 7.
3. Description
Main control board M76 (R76)
No. Description
01 Memory error
02 Reading running system NG
03 Read image data NG
04 Heater NG
05 Recording paper running system NG
06 Printed image data NG
07 Sending NG (include:C34/H34)
08 Receiving NG (include:C34/H34)
09 Clock NG
10 No sound from the speaker
11 PC I/F not operating correctly
12 Operation I/F not operating correctly
13 Toner IDU lock out detect NG
14 G4/G3 error
15 LAN error
V.34 modem board M76 (C34) or H34
No. Description
01 C34/H34 board NG
41285901TH Rev.3
At a frequency of 100 MHz or higher
15 to 20 W for IC replacement. A soldering iron with a higher capacity
should be better for the power supply pattern, etc.
LCD display or test print NG
Document feed error, etc.
All white, all black, image disturbance, etc.
Printer alarm 4, etc.
Recording paper feed error, etc.
Sector missing, positive after-image, etc.
Call origination error, protocol sending/
receiving error, etc.
Call origination error, protocol sending/
receiving error, etc.
Clock display error, time error, etc.
Buzzer/monitor, etc.
PC print/PC FAX error, etc.
LCD not displayed, key invalid, etc.
Invalid Toner Cart/Image Drum Unit
ISDN/G3 board I/F error
HSP error
Call origination error, protocol sending/
receiving error, etc.
Remarks
Remarks
See:
Figures 3.1-1, 2, 3, 4
Figure 3.1-5
Figures 3.1-6, 7
Figures 3.1-8, 9, 10
Figures 3.1-11, 12
Figures 3.1-13, 14, 15, 16
Figures 3.1-17, 18
See:
Figure 3.2-1
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