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C392B (bizhub 958/808)
Contents
| Trouble type | C392B: Fusing disconnection error detection (difference of temperature) |
| Rank | A |
| Trouble detection condition | bizhub 958, bizhub PRO 958: The difference between the temperature corrected by the fusing belt thermistor/1 (TH1) and the temperature detected by the fusing belt temperature sensor/1 (TEMS1) exceeds a predetermined value after warm up. |
| Trouble isolation | – bizhub 808/758: The difference between the temperature corrected by the heating roller thermistor/1 (TH1) and the temperature detected by the heating roller temperature sensor/1 (TEMS1) exceeds a predetermined value after warm up. |
| 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 thermistor/1 (TH1) (bizhub 958, bizhub PRO 958) • Heating roller thermostat/1 (TH1) (bizhub 808/758) • IH power supply unit (IHPU) • Noise filter (NF1) • 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-relay CN512-MFPB CN29E for proper connection and correct as necessary.
- Check the connector between NF1 CN2-IHPU CN1 for proper connection and correct as necessary.
- Check the connector between IHPU CN8-MFPB CN18E for proper connection and correct as necessary.
- Replace the fusing unit. ( 958)A796R71422 )( 808)A795R72922 )
- Replace IHPU. (958)( A796M40B00 )(808)( A8KNM40A02 )
- Replace MFPB. ( A796H02003)
- Replace NF1. (958)( A796M40H00 )(808)( A795M40J00 )
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.3.9.21.