Ricoh B230 Service Manual page 289

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Pressure roller thermistor error
The temperature measured by the pressure roller thermistor does not
reach 0 °C for 6 seconds.
Loose connection of pressure roller thermistor
Defective thermopile
551 A
Defective pressure roller thermistor
Related SC code: SC 541
1. Check that the pressure roller thermistor is firmly connected.
2. Replace the thermopile.
3. Replace the pressure roller thermistor.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Pressure roller warm-up error
After the main switch is turned on or the door is closed, the pressure
roller temperature does not reach the ready temperature within 70
seconds during fusing unit warm-up.
552 A
Pressure roller fusing lamp broken
Related SC code: SC 542
1. Check if the pressure roller thermistor is firmly connected.
2. Replace the pressure roller fusing lamp.
SM 4-49 B230/B237