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C9403, C9404 (bizhub 950i/850i)
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Contents
Trouble type | – C9403: CIS LED lighting failure – C9404: CIS LED lighting abnormally |
Rank | B |
Trouble detection condition | – C9403: The output from the CIS LED is a predetermined value or less during CIS sensor gain adjustment. – C9404: 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 cable – CIS module (CIS) – CIS power supply (CISPU) – CPU board (CPUB) – Base board (BASEB) |
Procedure
- Check the back side scanning shading shaft for any stain, and clean up it as necessary.
- Check that the bushing of the back side glass cleaning roller unit is on the standby position.
- Correct the harness connection between CIS CN2-BASEB CN5 if faulty.
- Correct the harness connection between CIS CN1-CISPU CN2 if faulty.
- Check CPUB for proper installation and correct as necessary.
- Measure the voltage of CISPU CN1-2.
- Control signal: CISPU CN1-2 (DC12V)
- Location of electrical component: DF 4-I
- Measure the voltage of CIS CN1-1, CN1-2 and CN1-5.
- Control signal: CIS CN1-1 (DC5V), CIS CN1-2 (DC5V), CIS CN1-5 (DC12V)
- Location of electrical component: DF 5-I
- For any abnormality in the measurement result, replace the CIS cable.
- Replace CIS.
- Replace CISPU.
- Replace CPUB.
- Replace BASEB.