Ricoh D117 Service Manual page 396

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Pressure roller overheat (software error): Center
The temperature detected by the pressure roller thermistor stays at the
prescribed temperature within the prescribed time.
563 A
Defective PSU

Defective BICU

1. Replace the PSU.
2. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Pressure roller overheat (hardware error): Center
The temperature detected by the pressure roller thermistor detects
prescribed temperature.
564 A
Defective BICU

Defective fusing control system

1. Replace the thermistor.
2. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Pressure roller thermistor error: End
The temperature detected by the pressure roller thermistor does not
reach 0 °C within the prescribed time.
Loose connection of the pressure roller thermistor

571 A
Defective thermopile

Defective pressure roller thermistor

1. Check if the pressure roller thermistor is firmly connected.
2. Replace the thermopile.
3. Replace the pressure roller thermistor.
SM 6-35
SC Tables
D117/D118