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C4501 (bizhub C750i)
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Contents
| Trouble type | C4501: Laser malfunction |
| Rank | B |
| Trouble detection condition | -SOS signal is not detected even after the lapse of a given period of time after starting the laser output. -SOS signal is not detected for a given period of time during printing or IDC sensor adjustment. |
| Trouble isolation | – |
| Relevant electrical parts | -PH unit -CPU board (CPUB) -Base board (BASEB) |
Procedure
- Check the connector between the PH unit-relay CN307-BASEB CN17E for proper connection and correct as necessary.
- Check CPUB for proper installation and correct as necessary.
- Replace the PH unit. (Part# AA7NH00500)
- Replace CPUB. (Part# ACKNH02P03
- Replace BASEB. (Part# ACKNH02101)