Ricoh B089 - Page 415

SERVICE CALL CONDITIONS
SM 7-7 B089/B093
Trouble-
shooting
Code No. Symptom Possible Cause
Fusing overheat error 3 545 A
After warmup, the hot roller attained full
operating temperature and maintained
this temperature for 10 sec. without the
hot roller rotating.
• Hot roller thermistor is out of position
• Fusing lamp broken
• Thermostat broken
Unstable fusing temperature 546 A
The fusing temperature varies 50°C or
more within 1 second twice
continuously.
• Thermistor defective
• Poor connection of the fusing unit
• Power supply unit defective
Zero cross signal malfunction 547 B
Zero cross signals are not detected
within a certain period.
• Power supply board defective
• SBCU board defective
Fusing unit set error 548 A
The machine does not detect the fusing
unit.
• Poor connection of the fusing unit
• The fusing unit is not installed
Exhaust fan motor error 590 B
The CPU detects an exhaust fan lock
signal for more than 5 seconds.
• Poor connection of the exhaust fan
motor
• Too much load on the motor drive
Communication break error between
SBCU and ADF
611 B
The SBCU receives a break signal from
the ADF main board.
• Serial line connecting SBCU and
ADF unstable
• External noise
• ADF main board defective
• SBCU board defective
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.
Counter device error 1 Japan Only 632 D
After 3 attempts to send a data frame to
the optional counter device via the
serial communication line, no ACK
signal was received within 100 ms.
• Serial line between the optional
counter device, the relay board and
copier control board is disconnected
or damaged
• Make sure that SP5113 is set to
enable the optional counter device.