Ricoh G133 Service Manual page 254

SC Table
No. Type
1.
2.
3.
No. Type
Fusing unit rotation error
The fusing belt sensor does not detect change in the actuator for 0.5
seconds after the fusing/paper exit motor has turned on.
548 A
1.
2.
3.
4.
5.
No. Type
G133
Details (Symptom, Possible Cause, Troubleshooting Procedures)
The zero cross signal is not detected for 3 seconds even though
the heater relay is on after turning on the main power or closing the
front door.
The detection error occurs twice or more in the 11 zero cross signal
detections. This error is defined when the detected zero cross
signal is less than 39.
Defective fusing relay
Defective fusing relay circuit
Shorted +24V fuse on the PSU
Unstable power supply
Check the power supply source.
Replace the +24V fuse on the PSU.
Replace the PSU
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Defective fusing/paper exit motor
Deformed actuator for the fusing belt sensor
Defective fusing belt sensor
Broken connection between IH inverter and IOB
Incorrectly set fusing unit
Check if the fusing unit is correctly set.
Check or replace the actuator for fusing belt sensor.
Replace the fusing belt sensor.
Replace the IH inverter.
Check the connection between IH inverter and IOB.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
4-38 SM