Ricoh G133 Service Manual page 243

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
High voltage power: Drum/ development bias output error
An error signal is detected for 0.2 seconds when charging the drum or
development.
High voltage leak
Broken harness
491 D
Defective drum unit or development unit
Defective high voltage supply unit
1. Check or replace the harness.
2. Replace the drum unit or paper transfer unit.
3. Replace the high voltage supply unit.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
High voltage power: Image transfer/ paper transfer bias output error
An error signal is detected for 0.2 seconds when charging the
separation, image transfer bet or paper transfer roller.
High voltage leak
Broken harness
492 D
Defective image transfer belt unit or paper transfer unit
Defective high voltage supply unit
1. Check or replace the harness.
2. Replace the image transfer belt unit or paper transfer unit.
3. Replace the high voltage supply unit.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
498 C Temperature and humidity sensor error
The thermistor output of the temperature sensor is not within the
prescribed range (0.5V to 4.2V). If this is detected consecutively
SM 4-27
SC Table
G133