Ricoh A-C2 Service Manual page 165

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