Ricoh A172 Service Manual page 284

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SC544: Fusing (hot roller) low temperature abnormal
- Definition - [A]
A fusing (hot roller) temperature of below 90°C is detected 6 times (within
6 seconds) after warm-up is completed.
- Possible causes -
Fusing (hot roller) thermistor defective
AC drive board defective
Main control board defective
Fusing (hot roller) thermistor not in position
Fusing (hot roller) lamp open
SC545: Fusing (hot roller) ready temperature abnormal
- Definition - [A]
Fusing (hot roller) temperature goes below the ready temperature (10°C
below the control temperature) after warm-up is completed, and it does
not reach the ready temperature within 6 minutes.
- Possible causes -
Fusing (hot roller) thermistor defective
AC drive board defective
Main control board defective
SC547: Fusing (hot roller) temperature does not increase
- Definition - [A]
During warm-up, the fusing (hot roller) temperature does not increase
when compared to the temperature 1 minute before.
- Possible causes -
Fusing (hot roller) thermistor defective
AC drive board defective
Main control board defective
SM
6-19
A172/A199

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