Ricoh B089 Service Manual page 415

Code No.
545 A Fusing overheat error 3
After warmup, the hot roller attained full
operating temperature and maintained
this temperature for 10 sec. without the
hot roller rotating.
546 A Unstable fusing temperature
The fusing temperature varies 50°C or
more within 1 second twice
continuously.
547 B Zero cross signal malfunction
Zero cross signals are not detected
within a certain period.
548 A Fusing unit set error
The machine does not detect the fusing
unit.
590 B Exhaust fan motor error
The CPU detects an exhaust fan lock
signal for more than 5 seconds.
611 B Communication break error between
SBCU and ADF
The SBCU receives a break 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 error between
SBCU and finisher
The SBCU cannot receive a response
within 100 ms after 3 attempts after
sending data to the finisher.
621 B Communication timeout error between
SBCU and finisher
A break (low) signal was received from
the finisher.
630 C Communication failure with CSS (RSS)
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.
632 D Counter device error 1 Japan Only
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.
SM
Symptom
7-7
SERVICE CALL CONDITIONS
Possible Cause
• Hot roller thermistor is out of position
• Fusing lamp broken
• Thermostat broken
• Thermistor defective
• Poor connection of the fusing unit
• Power supply unit defective
• Power supply board defective
• SBCU board defective
• Poor connection of the fusing unit
• The fusing unit is not installed
• Poor connection of the exhaust fan
motor
• Too much load on the motor drive
• Serial line connecting SBCU and
ADF unstable
• External noise
• ADF main board defective
• SBCU board defective
• SBCU board defective
• Download SBCU firmware again
• 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
• Serial line connecting SBCU and
finisher unstable
• External noise
• 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.
• 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.
B089/B093