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C3922, C3925, C3926 (bizhub 750i)
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Contents
| Trouble type | C3922: Fusing sensor wire breaks detection (Edge of the heating roller) C3925: Fusing sensor wire breaks detection (Main of the heating roller) C3926: Fusing sensor wire breaks detection (Center of the heating roller) |
| Rank | A |
| Trouble detection condition | C3922: The maximum value and minimum value of detected temperature of the heating roller thermistor/Edg (TH1) is compared after a lapse of given time from starting of warm up and the gap between the value of maximum and minimum is below a given temperature. C3925: The maximum value and minimum value of detected temperature of the heating roller temperature sensor (TEMS) is compared after a lapse of given time from starting of warm up and the gap between the value of maximum and minimum is below a given temperature. C3926: The maximum value and minimum value of detected temperature of the heating roller thermistor/Ctr (TH2) is compared after a lapse of given time from starting of warm up and the gap between the value of maximum and minimum is below a given temperature. |
| Trouble isolation | – |
| Relevant electrical parts | -Fusing unit -C3922: Heating roller thermistor/Edg (TH1), or C3925: Heating roller temperature sensor (TEMS), or C3926: 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 CN95-BASEB CN4E for proper connection and correct as necessary.
- Check CPUB for proper installation and correct as necessary.
- Replace the fusing unit. (Part# AA7NR70200)
- Replace CPUB. (Part# ACV7H02P02)
- Replace BASEB. (Part# ACV7H02101)