Ricoh D027 Service Manual page 30

No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Related SC code: SC 553
1. Replace the PSU.
2. Replace the IOB.
3. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Heating roller overheat 1 (hardware error)
During stand-by mode or a print job, the detected heating roller
temperature reaches 220 °C.
Defective PSU
Defective IOB
544 A
Defective BICU
Defective fusing control system
Related SC code: SC 543
1. Replace the PSU.
2. Replace the IOB.
3. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
547 D 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 3 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 39.
SM 3-33
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SC Tables
D027/D029 APPENDICES