Ricoh IM C400F

SC5xx: Paper Feed and Fusing
SM 6-39 D0CA/D0C9/D0C8/D0CB
Troubleshooting
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC541-01 A Fusing Thermopile (TH1) Error
SC541-11 D Fusing Thermopile (TH1) Error (Low Power)
• Broken Thermopile
• Connector contact failure
1. Reconnect the connector between the fusing unit and BiCU (PCB1).
2. Replace the Fusing Thermopile (TH1)
3. Replace the harness between the fusing unit and BiCU (PCB1).
4. Replace the BiCU (PCB1).
5. Replace the PSU (AC) (PCB17).
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC542-02 A Fusing Thermopile (TH1) Reload Error
SC542-12 D Fusing Thermopile (TH1) Reload Error (Low Power)
Fusing temperature failed to reach a temperature of 80 degrees C after
passing six seconds when:
• The machine starts warming up.
• The machine returns from energy saver mode.
• The fusing lamp is activated.
• Dirty or deformed Fusing Thermopile (TH1) lenses
• Disconnected or defective Fusing Thermopile (TH1)
• Input voltage out of specification (out of warranty)
• Fusing Thermostat open
1. Check the input voltage and replace the power plug (SC542-12 only).
2. Replace the Fusing Thermostat.
3. Replace the Fusing Sleeve Belt Assembly (fusing lamp).
4. Check and clean the Thermopile lenses or replace the Fusing Thermopile
(TH1).
5. Replace the BiCU (PCB1).
6. Replace the PSU (AC) (PCB17).