Ricoh D025 - Page 495

SC Tables
SM Appendix 3-43 D023/D025
Appendix
Service Call
Conditions
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller overheat 3 (software error)
The detected fusing roller temperature stays at 230°C or more for 1
second.
 Defective PSU
 Defective IOB
 Defective BICU
563 A
1. Replace the thermistor.
2. Replace the PSU.
3. Replace the IOB.
4. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller overheat 3 (hardware error)
The thermopile detects 250°C or more.
 Defective PSU
 Defective IOB
 Defective BICU
 Defective fusing control system
564 A
1. Replace the thermistor.
2. Replace the PSU.
3. Replace the IOB.
4. Replace the BICU.