Ricoh G133 Service Manual page 241

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
The image transfer belt contact sensor does not detect the movement
of actuator at the sensor while the polygon motor rotates.
Dirty image transfer belt contact sensor
Defective image transfer belt contact motor
Disconnected connector of image transfer belt contact sensor or
motor
Disconnected cable
1. Replace the image transfer belt contact sensor.
2. Replace the image transfer belt contact motor.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Image transfer belt unit error
The machine detects the encoder sensor error.
Defective encoder sensor
Image transfer unit installation error
443 D
Defective image transfer unit motor
1. Check if the image transfer belt unit is correctly set.
2. Replace the image transfer belt unit motor.
3. Replace the image transfer belt unit.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
452 D Paper transfer unit contact error
The paper transfer unit contact sensor does not detect the movement of
actuator at the sensor while the polygon motor rotates.
Defective paper transfer unit contact sensor
Defective paper transfer unit contact motor
Broken +24V fuse on PSU
Defective IOB
SM 4-25
SC Table
G133