No.
Definition
Symptom Possible Cause
634 C
Accounting RAM error
An error is detected in the RAM that
saves the information on the MF
accounting.
• Accounting device defective
635 B
Accounting battery error
An error is detected in the battery
that is in
the MF accounting device.
• Accounting device defective
670 C
Engine start error
The engine-ready signal is not
issued within 70 seconds after the
switch is turned on.
• Engine board defective
• Controller defective
• Loose connection
692 B
Controller board communication abnormal
Communication error between the
printer part of the controller board
and BICU.
• The connector is abnormal between the
controller board and the BICU board.
694
Controller board communication abnormal
Communication error between the
scanner part of the controller
board and BICU.
• The connector is abnormal between the
controller board and the BICU board.
760 B
ADF gate abnormal 1
The ADF Gate signal line between
the ADF main
board and the BICU
is disconnected.
• ADF main board defective
• Input/output board defective
• Poor connection (ADF Gate line) between
the ADF main board and the BICU.
761 B
ADF gate abnormal 2
The FGATE signal is not issued from
the ADF within
30 seconds after the
ADF starts feeding.
• ADF connector defective
• SBU board defective
6. Troubleshooting
186
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