Ricoh MPC 2800 AT-C2 Mode D'emploi page 436

3. Appendix: Service Call Conditions
No. Type
3
No. Type
545 A
No. Type
547 D
68
Details (Symptom, Possible Cause, Troubleshooting Procedures)
• Defective PSU
• Defective IOB
• Defective BICU
• Defective fusing control system
Related SC code: SC 543
1. Replace the PSU.
2. Replace the IOB.
3. Replace the BICU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller fusing lamp consecutive full power 1
When the fusing unit is not running in the ready condition, the heating roller fusing
lamp keeps on full power for 8 seconds.
• Broken heating roller fusing lamp
Related SC code: SC 555
1. Replace the heating roller fusing lamp.
2. Replace the PSU.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Zero cross error
• The zero cross signal is detected three times even though the heater relay is off
when turning on the main power.
• The zero cross signal is not detected for 2 seconds even though the heater relay
is on after turning on the main power or closing the front door.
• The detection error occurs twice or more in the 11 zero cross signal detections.
This error is defined when the detected zero cross signal is less than 45.
• Defective fusing lamp relay
• Defective fusing lamp relay circuit
• Unstable power supply
1. Check the power supply source.