Ricoh D143 Field Service Manual page 802

6. Troubleshooting
No. Type
443 C
No. Type
452 D
800
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Image transfer unit error
The machine detects the encoder sensor error.
• Defective encoder sensor
• Image transfer unit installation error
• Defective image transfer unit motor
1. Check if the image transfer unit is correctly set.
2. Replace the image transfer unit motor.
3. Replace the image transfer unit.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
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
1. Check the connection between the paper transfer unit and PSU.
2. Replace the paper transfer unit contact sensor.
3. Replace the paper transfer unit contact motor.
4. Replace the +24V fuse on the PSU.
5. Replace the IOB.