Ricoh A-C2 - Page 166

SERVICE CALL CONDITIONS 19 January, 2001
4-10
Code No. Symptom Possible Cause
Communication break error between
BICU and LCT
627 C
The BICU cannot communicate with the
LCT unit normally as a result of
receiving a break signal.
• 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
SC630 Communication failure with CSS
(RSS)
630 D
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 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.
BICU control data transfer sumcheck
error
640 D
A sampling of control data sent from the
BICU to the controller reveals a
sumcheck error. Only the logging count
is performed.
• Controller board defective
• External noise
• BICU board defective
BICU control data transfer abnormal641 D
A sampling of the control data sent from
the BICU reveals an abnormality.
• Controller board defective
• External noise
• BICU board defective
Engine response error670 B
After powering on the machine, a
response is not received from the
engine within the specified time.
• BICU installed incorrectly
• BICU defective
• Controller board defective
Controller-to-operation panel
communication error at startup
672 B
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
GAVD block I
2
C bus error690 A
An error is detected in the GAVD
communication I
2
C control register of
the GABIC2.
• I2C bus on BICU defective
GAVD FCI block I
2
C bus error691 A
An error is detected in the FCI
communication I
2
C control register of
the GABIC2.
• I2C bus on BICU defective
CDIC GAVD block I
2
C bus error692 A
An error is detected in the CDIC
communication I
2
C control register of
the GABIC2.
• I2C bus on BICU defective