Ricoh B022, Service Manual, Page: 853 / 878

Trouble-
shooting
SERVICE CALL CONDITIONS
SM 7-7 B022/B027
Code No. Symptom Possible Cause
Communication command error
between SBCU and ADF 612 B
The SBCU sends a command to the
ADF main board that it cannot execute.
•
SBCU board defective
•
Download SBCU firmware again
Communication timeout error between
SBCU and finisher 620 B
The SBCU cannot receive a response
within 100 ms after 3 attempts after
sending data to the finisher.
•
Serial line connecting SBCU and
finisher unstable
•
External noise
•
SBCU board and finisher main board
connection defective or loose
•
Finisher main board defective
•
SBCU board defective
Communication timeout error between
SBCU and finisher 621 B
A break (low) signal was received from
the finisher.
•
Serial line connecting SBCU and
finisher unstable
•
External noise
Communication failure with CSS (RSS) 630 C
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.
•
Occurred with an SC call, CC call,
supply management call, user call, or
CE call.
•
Timeout while no response from the
LADP, and abnormal signal on the
RS-485 line between PI and LADP.
SBCU control data transfer checksum
error 640 C
A sampling of control data sent from the
SBCU to the controller reveals a
checksum error. Only the logging count
is performed.
•
Controller board defective
•
External noise
•
SBCU board defective
SBCU control data transfer abnormal 641 C
A sampling of the control data sent from
the SBCU reveals an abnormality.
•
Controller board defective
•
External noise
•
SBCU board defective
Communication timeout error between
SBCU and duplex unit 650 B
The SBCU cannot receive a response
within 1 second from the duplex unit.
•
Serial line connecting SBCU and
duplex unit unstable
•
External noise
•
SBCU board and duplex main board
connection defective or loose
•
Duplex main board defective
•
SBCU board defective
Engine response error 670 D
After powering on the machine, a
response is not received from the
engine within 30 seconds.
•
SBCU installed incorrectly
•
SBCU defective
•
Controller board defective
Controller-to-operation panel
communication error at startup 672 D
After powering on the machine, the
communication circuit between the
controller and the operation panel is not
opened, or communication with
controller is interrupted after a normal
startup.
•
Controller stall
•
Controller board installed incorrectly
•
Controller board defective
•
Operation panel connector loose or
defective
Rev. 11/2002