Samsung CLX-8640ND - Page 426

4.Troubleshooting
6)Unevenpitchandjitterimage
StepSectionCheckitemResultAction
11.7mmor1.2mmor2.7mmperiodicjitter
hasoccurred.
YesReplacethedeveloperunit.
2
DeveloperUnit
35mmor62mmor43mmperiodicjitteror
bandhasoccurred.
YesReplacethedeveloperunit.
3DrumUnit94mmperiodicjitterhasoccurred.Y esReplacethedrumunit.
4LSU0.508mmor0.65mmperiodicjitterhas
occurred.
YesReplacetheLaserScanningUnit
(LSU).
5Regirollergear2.5mmperiodicjitterhasoccurred.YesReplacetheRegirollergear.
6HVPSboardChecktheconnectionofthehighvoltage
supplyterminalofthe1stor2ndtransfer
rollers.
YesReplacetheHVPSboard.
7MainDriveUnitAfterreplacingthedeveloperunitordrum
unit,theperiodicjitterorbandhasoccurred.
YesReplacethemaindriveunit.
8ITBUnit44mmperiodicbandhasoccurred.YesReplacetheITBUnit.
9TransferRollerAssy55~56mmperiodicbandhasoccurred.YesReplacetheTransferRollerAssy.
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