Ricoh A-P4, Service Manual

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• LCT interface board defective
• BICU board defective
670 D
Engine startup error
The BICU failed to respond with the pre-
scribed time when the machine was turned
on.
• Connections between BICU and
controller board are loose, discon-
nected, or damaged
• Replace the BICU
• Replace the controller board
672 D
Controller startup error
• After power on, the line between the
controller and the operation panel did
not open for normal operation.
• After normal startup, communication
with the controller stopped.
• Controller stalled
• Controller installed incorrectly
• Controller board defective
• Operation panel harness discon-
nected or defective
692 D
GAVD block 12C bus error
The I2C bus of the BICU is defective • Replace BICU
722 B
Finisher jogger motor error • Jogger motor connector or harness
loose, broken, defective
• Jogger motor defective
• Jogger HP sensor connector or har-
ness loose, broken, defective
• Jogger HP sensor defective
The finisher jogger HP sensor did not return
to the home position, or move out of the
home position, within 1.25 sec. Staple mode
cannot be used.
724 B
Finisher staple hammer motor error • Staple jam
• Stapler overload caused by trying to
staple too many sheets
• Staple hammer motor connector or
harness loose, broken, defective
• Staple hammer motor defective
Stapling does not finish within 150 ms after
the staple hammer motor turned on. Staple
mode cannot be used.
4. Troubleshooting
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