Ricoh A-P3 Service Manual page 122

6 November, 2001
SC Level
621 C Communication timeout error
between BICU and finisher or
mailbox
A break (low) signal is received from
the finisher or the mailbox.
623 C Communication timeout error
between BICU and paper tray unit
The BICU does not receive a
response after 3 attempts within 100
ms to send 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 because it has
received a break signal.
626 C Communication timeout error
between BICU and LCT
The BICU does not receive a
response after 3 attempts within 100
ms to send data to the LCT.
627 C Communication break error between
BICU and LCT
The BICU cannot communicate with
the LCT unit because it has received
a break signal.
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.
641 D BICU control data transfer abnormal
Data send from BICU to controller
failed after 3 attempts.
690 A GAVD block I
An error is detected in the GAVD
communication I
the GABIC2.
691 A GAVD FCI block I
An error is detected in the FCI
communication I
the GABIC2.
Symptom
2
C bus error
2
C control register of
2
C bus error
2
C control register of
4-9
SERVICE CALL CONDITIONS
Possible Cause
• 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
• Controller board defective
• External noise
• BICU board defective
• Controller board defective
• External noise
• BICU board defective
• I2C bus on BICU defective
• I2C bus on BICU defective