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C3731 (bizhub 950i/850i)
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Contents
| Trouble type | C3731: Fusing abnormally high temperature detection (hard protector) |
| Rank | A |
| Trouble detection condition | The hard protector signal high temperature malfunction is detected. |
| Trouble isolation | – |
| Relevant electrical parts | – Fusing unit – Heating roller thermistor/Edg (TH1) – Heating roller thermistor/Ctr (TH2) – Heating roller temperature sensor/2 (RD2) – 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.