C3722,C3725,C3726 (bizhub 950i/850i)
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Contents
| Trouble type | – C3722: Fusing abnormally high temperature detection (edge of the heating roller) – C3725: Fusing abnormally high temperature detection (main of the heating roller) – C3726: Fusing abnormally high temperature detection (center of the heating roller) |
| Rank | A |
| Trouble detection condition | – C3722: Detected temperature of the heating roller thermistor/Edg (TH1) goes beyond a given temperature for a given period of time consecutively. – C3722: Detected temperature of the heating roller temperature sensor/2 (RD2) goes beyond a given temperature for a given period of time consecutively. – C3725: Detected temperature of the heating roller temperature sensor/1 (RD1) goes beyond a given temperature for a given period of time consecutively. – C3726: Detected temperature of the heating roller thermistor/Ctr (TH2) goes beyond a given temperature for a given period of time consecutively. |
| Trouble isolation | – |
| Relevant electrical parts | – Fusing unit – C3722: Heating roller thermistor/Edg (TH1) – C3722: Heating roller temperature sensor/2 (RD2) – C3725: Heating roller temperature sensor/1 (RD1) – C3726: Heating roller thermistor/Ctr (TH2) – CPU board (CPUB) – Base board (BASEB) |
Procedure
- Check the fusing unit for correct installation (whether it is secured in position).
- Check the open/close operation of the right door.
- Check the connector between the fusing unit-relay CN807-BASEB CN30E for proper connection and correct as necessary.
- Check CPUB for proper installation and correct as necessary.
- Replace the fusing unit.
- Replace CPUB.
- Replace BASEB.