Ricoh A-C2 - Page 165

19 January, 2001 SERVICE CALL CONDITIONS
4-9
Trouble-
shooting
Code No. Symptom Possible Cause
Communication error between BICU
and scanner unit
601 C
Within 800 ms after power on, after 3
attempts the BICU does not
communicate with the SIB via the serial
line.
• Serial line connecting the BICU and
SIB defective
• External noise on the serial line
• SIB board defective
• BICU board defective
Communication timeout error between
BICU and ADF
610 C
The BICU cannot receive a response
within 100 ms after 3 attempts after
sending data to the ARDF.
• BICU board and ADF main board
serial line connection defective
• External noise
• ADF main board defective
• BICU board defective
Communication break error between
BICU and ADF
611 C
The BICU receives a break signal from
the ADF main board.
• Serial line connecting BICU and ADF
unstable
• External noise
• ADF main board defective
• BICU board defective
Communication command error
between BICU and ADF
612 C
The BICU sends a command to the
ADF main board that it cannot execute.
• Abnormal operation performed by
software
Communication timeout error between
BICU and finisher or mailbox
620 C
The BICU cannot receive a response
within 100 ms after 3 attempts after
sending data to the finisher or mailbox.
• Serial line connecting BICU and
finisher unstable
• External noise
• BICU board and finisher main board
connection defective or loose
• Finisher main board defective
• BICU board defective
Communication timeout error between
BICU and finisher or mailbox
621 C
A break (low) signal was received from
the finisher or the mailbox.
• Serial line connecting BICU and
finisher unstable
• External noise
Communication timeout error between
BICU and paper tray unit
623 C
The BICU cannot receive a
response within 100 ms after 3
attempts after sending data to the
paper tray unit.
• Serial line connecting BICU and
paper tray unit unstable
• External noise
• BICU board and paper tray main
board connection defective or loose
• Paper tray main board defective
• BICU board defective
Communication break error between
BICU and paper tray unit
624 C
The BICU cannot communicate with the
paper tray unit normally as a result of
receiving a break signal.
• Serial line connecting BICU and
paper tray unit unstable
• External noise
• BICU board and LCT main board
connection defective or loose
• Optional paper feed unit interface
board defective
• BICU board defective
Communication timeout error between
BICU and LCT
626 C
The BICU cannot receive a response
within 100 ms after 3 attempts after
sending data to the LCT.
• Serial line connecting BICU and LCT
unit unstable
• External noise
• BICU board and LCT main board
connection defective or loose
• LCT interface board defective
• BICU board defective