Samsung CLX-8640 series - Page 425

4.Troubleshooting
5)Incorrectcolorregistration
StepSectionCheckitemResultAction
1OPC-ACRPerformtheOPC-ACR.(Diagnostics
>ColorManagement>FullColor
Registration)
Thereisstillcolorshift.
YesGotofollowingchecks.
2OPCcouplingCheckiftheOPCcouplingsofthedrum
unitandmaindriveunitaredefective.
Yes
1)Ifthecouplingofthedrum
unitisdefective,replacethe
drumunit.
2)Ifthecouplingofthemain
driveunitisdefective,
replacethemaindriveunit.
3Isthetransferbeltunitinstallednormally?NoRemoveandre-installtheITB
unit.
4
ITBunit
•Deformationordamageofthe
transferbeltorstainsonthetransfer
belt.
•Stainordamageofthedriveroller.
•Checkifthecouplingsofthetransfer
unit.
YesCleanorreplacetheITBunit.
5LSUPrintthelineimage.Arethelinesbent?Y esReplacetheLSU.
6HVPSboardChecktheconnectionofthehighvoltage
supplyterminalofthe1stor2ndtransfer
rollers.
YesReplacetheHVPSboard.
7OPC-ACRPerformOPC-ACR.Afternishingservice,please
performOPC-ACRandrecheck
again.
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