Ricoh MPC 2800 AT-C2 Mode D'emploi page 438

3. Appendix: Service Call Conditions
No. Type
No. Type
3
554 A
No. Type
555 A
No. Type
557 C
70
Details (Symptom, Possible Cause, Troubleshooting Procedures)
• Defective BICU
1. Replace the PSU.
2. Replace the IOB.
3. Replace the BICU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller fusing lamp overheat 2 (hardware error)
The temperature detected by the heating roller thermistor reaches 250°C or more.
• Defective PSU
• Defective IOB
• Defective BICU
• Defective fusing control system
1. Replace the PSU.
2. Replace the IOB.
3. Replace the BICU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller lamp consecutive full power 2
The heating roller-fusing lamp stays ON for 15 seconds or more while the fusing
unit is in the ready condition.
• Broken heating roller fusing lamp
1. Replace the heating roller fusing lamp.
2. Replace the PSU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Zero cross frequency error
When the zero cross signal is 66 or more and it is detected 10 times or more in 11
detections, the machine determines that input 60 Hz and SC557 occurs.
• Noise (High frequency)