Ricoh M022 Service Manual page 662

6. Troubleshooting
No. Type
452 D
6
No. Type
460 D
660
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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 BCU
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 BCU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Separation power pack output error
An interrupt checks the status of the power pack every 20 ms. This SC is issued if the
BCU detects a short in the power pack 10 times at D(ac).
• Damaged insulation on the high-voltage supply cable
• Damaged insulation around the high-voltage power supply.
1. Replace the high-voltage supply cable.
2. Replace the high-voltage power supply unit.
3. Replace the BCU.
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