C3731 (bizhub 958/808)
Contents
| Trouble type | C3731: Fusing abnormally high temperature (Hard protector) |
| Rank | A |
| Trouble detection condition | An abnormally high temperature of the hard protector signal is detected. |
| Trouble isolation | – |
| Relevant electrical parts | • Fusing unit • Fusing belt temperature sensor/1 (TEMS1) (bizhub 958, bizhub PRO 958) • Heating roller temperature sensor/1 (TEMS1) (bizhub 808/758) • Fusing belt temperature sensor/2 (TEMS2) (bizhub 958, bizhub PRO 958) • Heating roller temperature sensor/2 (TEMS2) (bizhub 808/758) • Fusing belt temperature sensor/3 (TEMS3) (bizhub 958, bizhub PRO 958) • Heating roller temperature sensor/3 (TEMS3) (bizhub 808/758) • Pressure roller thermistor/2 (TH3) • 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 fusing unit-MFPB CN30E for proper connection and correct or change as necessary.
- Check the connector between TEMS1, TEMS2, TEMS3-relay CN512-MFPB CN29E for proper connection and correct as necessary.
- Replace the fusing unit. ( A796R71422 )
- Replace TEMS1, TEMS2, TEMS3. (A796M50000)
- Replace MFPB. ( A796H02003)
Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.
(Link to the Field Service Manual) K.3.9.12.