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C3903 (bizhub C759/C659)
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Contents
| Trouble type | C3903: Thermostat breaks detection |
| Rank | A |
| Trouble detection condition | The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning. |
| Trouble isolation | – |
| Relevant electrical parts | -Fusing unit -Heating roller thermostat (TS1) -MFP board (MFPB) |
Procedure
- Check the fusing unit for correct installation (whether it is secured in position).
- Check the open/close operation of the upper right door.
- Check the connector between the fusing unit-relay CN259-MFPB CN30E for proper connection and correct or change as necessary.
- Replace the fusing unit. (Part# A8JER70222)
- Replace MFPB. (Part# A8JEH02002)
L.3.10.12 (Link to the Field Service Manual)