Oki OKIOFFICE84 Maintenance Manual page 456

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: 15 to 20 W for IC replacement. A soldering iron with a higher capacity should
(3) Extension cable:See Extension cable list in Chapter 7.
3. Description
3.1 R51 Board
No. Description
01 Memory error
02 Reading running system NG
03 Read image data NG
04 Heater NG
05 Recording paper running system NG Recording paper feed error, etc.
06 Printed image data NG
07 Sending NG
08 Receiving NG
09 Clock NG
10 No sound from the speaker
11 PC I/F not operating correctly
12 Operation I/F not operating correctly
3.2 O4W Board
No. Description
01 LCD display NG
02 Operation not responded
At a frequency of 100 MHz or higher
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.
Sector missing, positive after-image, etc.
Call origination error, protocol sending/
receiving error, etc.
Call termination error, protocol sending/
receiving error, etc.
Clock display error, time error, etc.
Buzzer/monitor error, etc.
PC print/PC FAX error, etc.
LCD not displayed, key invalid, etc.
LCD not displayed (LCD failures excluded)
Key press or LED invalid
Remarks
Remarks
H - 1
See:
Figures 1-1, 2, 3, 4
Figure 2-1
Figures 3-1, 2
-
Figures 5-1, 2
Figures 6-1, 2, 3, 4, 5, 6
-
-
Figures 9-1, 2
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Figures 11-1, 2
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See:
40672201TH Rev. 4