Ricoh G188 Service Manual page 329

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Pressure roller temperature error
The temperature of the pressure roller does not reach the ready
temperature for 120 seconds after the pressure roller fusing lamp has
turned on.
Dirty thermopile
562 A
Defective pressure roller thermistor
Defective pressure roller fusing lamp
1. Clean the thermopile.
2. Replace the thermistor for the pressure roller.
3. Replace the pressure roller fusing lamp.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Pressure roller overheat 3 (software error)
The temperature detected by the pressure roller thermistor stays at
215°C or more for 1 second.
Defective PSU
563 A
Defective IOB
Defective BCU
1. Replace the PSU.
2. Replace the IOB.
3. Replace the BCU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Pressure roller overheat 3 (hardware error)
564 A
The pressure roller thermistor detects 220°C or more.
SM Appendix
Service Call Conditions
3-33 G188/G189