C9403 (bizhub C554/C454)
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Contents
| Trouble type | CIS LED lighting failure |
| Trouble code | C9403 |
| Rank | A |
| Detection timing | At the CIS gain adjustment, the machine detected that the output of the CIS LED is lower than the specified value. |
| Trouble isolation | Scanner |
| Relevant electrical parts | -CIS module (CIS) -CIS power supply (CISPU) -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 CISPU if faulty. | – | – |
| 3 | Replace CIS (Part# A3CEM70000) | – | – |
| 4 | CISPU F1, F2 conduction check | – | – |
| 5 | Replace CISPU (Part# A3CEPP4Y00) | – | – |
| 6 | Replace DSIPB (Part# A161H02A00) | – | – |
| 7 | Replace MFPB (Part# A2XKH02004) | – | – |
- Link to the layout drawings for related parts by each trouble code (S.113. C6754, C6755, C9403, C9404)
K3.13.2 (Link to the Field Service Manual)