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C9404 (bizhub C554e/C454e)
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) • CIS power supply (CISPU) • Dual scan image processing board (DSIPB) • MFP board (MFPB) |
(2)Procedure
| Step | Action | Control signal | Location of electrical components |
| 1 | Check the back side scanning shading shaft for any stain, and clean up it as necessary. | – | – |
| 2 | Check that the bearing of the back side glass cleaning roller unit is on the standby position. | – | – |
| 3 | Correct the harness connection between CIS and DSIPB if faulty. | – | – |
| 4 | Correct the harness connection between CIS and CISPU if faulty. | – | – |
| 5 | Measure the voltage of CISPU J1-1. | CISPU J1-1 (DC12V) | DF-701 5-B |
| 6 | Measure the voltage of CIS J222-1, J222-2 and J222-5. | CIS J222-1 (DC5V)CIS J222-2 (DC5V)CIS J222-5 (DC12V) | DF-701 4-B |
| 7 | For any abnormality in the measurement result, replace the CIS cable. (A3CEN11711 or A3CEN11700Old) | – | – |
| 8 | Replace CIS (Part# A3CEM70000) | – | – |
| 9 | CISPU F1, F2 conduction check | – | – |
| 10 | Replace CISPU (Part# A3CEPP4Y00) | – | – |
| 11 | Replace DSIPB (Part# A5C1H02A01) | – | – |
| 12 | Replace MFPB (Part #A5C1H0200B) | – | – |
- Link to the layout drawings for related parts by each trouble code (S.115. C6754, C6755, C9403, C9404)
Please search Knowledge Base articles and Bulletins as they may contain relevant information and updated Part information such as Part numbers.
K.3.13.2 (Link to the Field Service Manual)