Ricoh M016 Service Manual page 157

Fusing Lamp Overheat Error
The fusing lamps remained ON at full capacity for more than 9 s after the fusing
temperature attains reload temperature.
Deformed thermistor
Thermistor not in the correct position
545 Defective fusing lamp
1. Replace the fusing unit.
2. Replace the fusing lamp.
Execute "Fuser SC Reset" to recover the machine after completing the
recovery procedure. Otherwise, the machine continues to issue this SC
code and cannot be operated.
Zero cross error
The zero cross signal is detected three times even though the fusing lamp
relay is off when turning on the main power.
The zero cross signal is not detected for 3 seconds even though the fusing
lamp relay is on after turning on the main power or closing the front door.
The detection error occurs twice or more in 11 zero cross signal detections.
This error is defined when the detected zero cross signal is less than 45.
The zero cross signal is not detected three times while the main power
547
remains ON.
Defective fusing relay
Defective fusing relay circuit
Shorted +24V fuse on the PSU
Unstable power supply.
1. Check the power supply source.
2. Replace the +24V fuse on the PSU.
3. Replace the PSU
SM
Service Call Conditions
6-7 M016/M017