Ricoh Aficio MP C305SP Field Service Manual page 654

6. Troubleshooting
No. Type
492 C
No. Type
497 C
No. Type
498 C
652
Details (Symptom, Possible Cause, Troubleshooting Procedures)
High voltage power: Image transfer/ paper transfer bias output error
An error signal is detected for 200 ms when charging the separation, image
transfer belt or paper transfer roller.
• High voltage leak
• Broken harness
• Defective image transfer belt unit or paper transfer unit
• Defective high voltage supply unit
1. Check or replace the harness.
2. Reinstall or replace the image transfer belt unit or paper transfer unit.
3. Replace the high voltage supply unit.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Image creation temperature sensor error 1
The thermistor output of the temperature sensor is not within the prescribed range
(more than 0.5 V to less than 3.0 V) for three consecutive times.
-
1. Turn the power switch off and on.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Temperature and humidity sensor error
• The thermistor output of the temperature sensor was not within the prescribed
range (more than 0.76V to less than 2.90V).
• The thermistor output of the humidity sensor was not within the prescribed
range (2.4V or more).
• Temperature and humidity sensor harness disconnected, loose, defective
• Temperature and humidity sensor defective
1. Check the connector and harness.
2. Replace the temperature and humidity sensor.