Ricoh MP C407 - Page 452

SC5xx: Paper Feed and Fusing
446
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
• Loose connector
1. Check the input voltage and reconnect the power cord.
2. Reconnect the connectors between the fusing drawer connector, the BiCU, and the
pressure roller thermistor.
3. Replace the thermistor.
4. Replace the fusing unit.
5. Replace the harnesses between the BiCU and the fusing unit.
6. Replace the BiCU.
7. Replace the PSU (AC).
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC572-02 A Pressure roller thermistor (rear) cannot be reloaded
SC572-12 D Pressure roller thermistor (rear) cannot be reloaded (low power)
Fusing temperature failed to reach a temperature of 50 degrees C when 100 seconds passes
after starting a job where the paper width is wider than 206 mm AND is equal or smaller than
216 mm.
• Dirty or deformed thermistor
• Input voltage out of specification (out of warranty)
• Thermostat blown out
1. Check the input voltage and reconnect the power cord.
2. Replace the fusing thermostat.
3. Replace the fusing lamp.
4. Replace the thermistor.
5. Replace the BiCU.
6. Replace the PSU (AC).
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SC573-00 A Pressure roller overheat (rear) (software error)
Pressure roller thermistor (rear) detects a temperature of 248 degrees C for 10 consecutive
times in a specific machine condition.
• Shorted triac
• Defective BiCU
1. Reconnect the connectors between the fusing drawer connector, the BiCU, and the
pressure roller thermistor.
2. Replace the thermistor.
3. Replace the harnesses between the BiCU and the pressure roller thermistor.
4. Replace the BiCU.