C4501 (bizhub 650i/550i/450i)
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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.
650i/550i (Part# AC74R70200)
450i (Part# AC76R70100) - Replace CPUB.
650i/550i (Part# AC74H02P03)
450i (Part# AC76H02P02) - Replace BASEB. (Part# AC74H02101)