Ricoh G188 Service Manual page 313

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
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.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
High voltage power: Separation bias output error
The status of the power pack is checked every 20 ms. This SC is issued
if the BCU detects a short in the power pack 10 times at D(ac).
Disconnected or broken cables
Damaged insulation on the high-voltage supply cable
460 D
Damaged insulation around the high-voltage power supply
Defective high-voltage power supply unit
1. Replace the high-voltage supply cable.
2. Replace the high-voltage power supply unit.
3. Replace the IOB.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Toner transport motor error
The LOCK signal is not detected for 2 seconds when the transport
motor turns on.
Toner transport motor overload
Disconnected or broken harness
490 D
Defective toner transport motor
Opened +24V fuse on the PSU
Defective interlock switch
1. Check or replace the harness.
2. Replace the toner transport motor.
SM Appendix
Service Call Conditions
3-17 G188/G189