Ricoh OR-C1 Field Service Manual page 421

No. Type
Fusing overheat error 1 (center)
The fusing thermistor detected a fusing temperature over 230°C for 5 sec. at the
center of the hot roller.
• TRIAC short on PSU (PSU defective)
543 A
• BCU board defective
• Fusing thermistor defective
1. Replace the PSU.
2. Replace the BCU board.
3. Replace the thermistor.
No. Type
Fusing overheat error 2 (center)
A fusing temperature over 250°C is detected at the center of the hot roller by the
fusing temperature monitor circuit in the BCU board.
The power was interrupted for more than 0.3 sec.
• TRIAC short on PSU (PSU defective)
• BCU board defective
544 A
• Fusing thermistor defective
• Power supply voltage unstable
1. Replace the PSU.
2. Replace the BCU board.
3. Replace the thermistor.
4. Check the power supply source.
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Details (Symptom, Possible Cause, Troubleshooting Procedures)
Service Call Conditions
3
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