Ricoh R-C4 Service Manual page 163

21 July 2006
Code No.
611 B Communication break error between
SBCU and ADF
The SBCU received a break (LOW)
signal from the ADF main board.
612 B Communication command error
between SBCU and ADF
The SBCU sends a command to the
ADF main board that it cannot execute.
620 B Communication timeout between SBCU
and finisher: Error 1
The SBCU cannot receive a response
within 100 ms after 3 attempts after
sending data to the finisher.
621 B Communication timeout between SBCU
and finisher: Error 2
A break (LOW) signal was received from
the finisher.
650 B Communication timeout error between
SBCU and duplex unit
The SBCU cannot receive a response
within 1 sec. from the duplex unit.
669 B EEPROM Communication Error
The machine failed to detect a match
between the read/write data for the
EEPROM on the SBCU after 3 attempts.
670 D Engine response error
After powering on the machine, a
response is not received from the
engine within 30 seconds.
672 D Controller-to-operation panel
communication error at startup
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.
720 B Finisher motor error
The meaning of this SC error depends
on which finisher is installed.
500-sheet Finisher B442
There is a problem with the upper
transport motor.
1000-sheet Finisher B408
There is a problem with the registration
motor.
Symptom
4-9
SERVICE CALL CONDITIONS
Possible Cause
• Serial line connecting SBCU and
ADF unstable
• Connectors between SBCU and
ADF loose, disconnected, or
damaged
• Update the firmware
• SBCU board defective
• Serial line connecting SBCU and
finisher unstable
• External noise
• Serial line connecting SBCU and
finisher unstable
• External noise
• 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
• EEPROM installed incorrectly
• EEPROM defective
After you check the installation, turn
the machine off and on. If this does not
repair the problem, replace the SBCU.
• SBCU installed incorrectly
• SBCU defective
• Controller board defective
• Controller stall
• Controller board installed incorrectly
• Controller board defective
• Operation panel connector loose or
defective
• The motor connectors are loose,
disconnected or damaged.
• The motor is defective