A break (low) signal was received from the
finisher.
• BICU board and finisher main board
connection defective or loose
• Finisher main board defective
• BICU board defective
623 D
Communication timeout error between
BICU and paper tray unit
• Serial line connecting BICU and pa-
per tray unit unstable
• External noise
• BICU board and paper tray main
board connection defective or loose
• Paper tray main board defective
• BICU board defective
The BICU cannot receive a response within
100 ms after 3 attempts after sending data
to the paper tray unit.
624 D
Communication break error between BICU
and paper tray unit
• Serial line connecting BICU and pa-
per tray unit unstable
• External noise
• BICU board and paper tray unit con-
nection defective
• Optional paper tray unit interface
board defective
• BICU board defective
The BICU cannot communicate with the pa-
per tray unit due to receiving a break signal.
626 D
Communication timeout error between
BICU and LCT
• 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
The BICU cannot receive a response within
100 ms after 3 attempts after attempting to
communicate with the LCT.
627 D
Communication break error between BICU
and LCT
• Serial line connecting BICU and LCT
unit unstable
• External noise
• BICU board and LCT main board
connection defective or loose
The BICU cannot communicate with the LCT
unit due to receiving a break signal.
Service Call Conditions
159
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