Ricoh MPC 2800 AT-C2, Field Service Manual, Page: 426 / 856

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
542 A
Heating roller warm-up error 1
• After the main switch is turned on or the cover is closed, the increment of the
heating roller temperature per 10 seconds is 30°C or less. If this condition is
detected five times consecutively, SC 542 is defined.
• The heating roller temperature does not reach 100°C for 15 seconds after the
heating lamp on.
• The heating roller temperature does not reach the ready temperature while 60
seconds after the heating lamp on.
• The center temperature of the heating roller does not reach the ready
temperature for 30 seconds after the both edge temperature of the heating
roller has reached the ready temperature.
• Dirty or defective thermopile
• Defective thermistor
• Defective heating roller lamp
1. Check if the heating roller thermistor is firmly connected.
2. Replace the thermistor.
3. Check or replace the thermopile.
4. Replace the heating roller lamp.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
543 A
Heating roller fusing lamp overheat 1 (software error)
The detected fusing temperature stays at 230°C for 1 second.
• Defective PSU
• Defective IOB
• Defective BICU
Related SC code: SC 553
1. Replace the PSU.
2. Replace the IOB.
3. Replace the BICU.
3. Appendix: Service Call Conditions
70
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