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C9404 (bizhub C754/C654)
Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.
Contents
| Trouble type | CIS LED lighting abnormally |
| Trouble code | C9404 |
| Rank | A |
| Detection timing | After a scan job is completed, the machine detected that the average output of the CIS LED is greater than the specified value. |
| Trouble isolation | Scanner |
| Relevant electrical parts | -CIS module (CIS) -DF power supply (DFPU) -Dual scan image processing board (DSIPB) -MFP board (MFPB) |
(2)Procedure
| Step | Action | Control signal | Location of electrical components |
| 1 | Correct the harness connection between CIS and DSIPB if faulty. | – | – |
| 2 | Correct the harness connection between CIS and DFPU if faulty. | – | – |
| 3 | Replace CIS (Part# A2X0R70M00) | – | – |
| 4 | Replace DFPU (Part# A3CKH00200) | – | – |
| 5 | Replace DSIPB (Part# A161H02A00) | – | – |
| 6 | Replace MFPB (Part# A2XKH02004) | – | – |
- Link to the layout drawings for related parts by each trouble code (S.109. C9403, C9404)
K.3.13.2 (Link to the Field Service Manual)