Ricoh MPC 2800 AT-C2, Field Service Manual, Page: 429 / 856

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
552 A
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.
• 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.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
553 A
Pressure roller fusing lamp overheat (software error)
The detected pressure roller temperature stays at 230°C or more for 1 second.
• Defective PSU
• Defective IOB
• Defective BICU
Related SC code: SC 543
1. Replace the pressure roller thermistor.
2. Replace the PSU.
3. Replace the IOB.
4. Replace the BICU.
SC Tables
73
3