Ricoh B079 Service Manual page 208

SERVICE CALL CONDITIONS
Code No.
620 C Communication timeout error between
BICU and finisher.
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.
A break (low) signal was received from
the finisher.
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.
627 C Communication break error between
BICU and LCT
The BICU cannot communicate with the
LCT unit normally as a result of
receiving a break signal.
630 D SC630 Communication failure with CSS
(RSS)
The communication from the copier was
detected as abnormal at the CSS
center. This error occurs when the
acknowledge signal from the LADP
does not complete normally.
640 D BICU control data transfer sumcheck
error
A sampling of control data sent from the
BICU to the controller reveals a
sumcheck error. Only the logging count
is performed.
B079/B082
CÓPIA NÃO CONTROLADA
Symptom
4-10
CÓPIA NÃO CONTROLADA
Possible Cause
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
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
Occurred with a SC call, CC call,
Supply Management call, User call,
or CE call.
Timeout while no response from the
LADP, and signal on the RS-485 line
between PI and LADP is abnormal.
Controller board defective
External noise
BICU board defective
SM