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C3722 (bizhub C287/C227)
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Contents
| Trouble type | C3722: Fusing abnormally high temperature detection (Edge of the heating roller) |
| Rank | A |
| Trouble detection condition | -Detected temperature of the heating roller thermistor/1 (TH1) goes beyond a given temperature for a given period of time consecutively. -The hard protector signal remains LOW for a predetermined continuous period of time. |
| Trouble isolation | – |
| Relevant electrical parts | -Fusing unit -Heating roller thermistor/1 (TH1) -DC power supply (DCPU) -MFP board (MFPB) |
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 CN4-MFPB CN16E for proper connection and correct as necessary.
- Replace the fusing unit. (Part# A797R70211)
- Replace DCPU. (Part# A797R70800)
- Replace MFPB. (Part# A797H02118)
K.3.10.4 (Link to the Field Service Manual)