Samsung M2070F - Image Quality Problem Diagnosis

4.AlignmentandTroubleshooting
4.2.3.Imagequalityproblem
1)VerticalBlackLineandBand
Description:Straightthinblackverticallineoccursintheprintedimage.
CheckandcauseSolution
•Damageddeveloprollerinthetonercartridge.
DeformedDoctor-bladeorcleaning-blade.
•Scratchedsurfaceofthechargerollerinthetoner
cartridge.
Replacethetonercartridge.
Partlydepressionordeformationonthesurfaceofthe
transferroller.
Replacethetransferroller.
2)VerticalWhiteLine
Description:Whiteverticalvoidsoccursintheprintedimage.
CheckandcauseSolution
Foreignmatterstucksontothewindowofinternallensesof
LSUmirror.
CleantheLSUwindowwithrecommendedcleaner(IPA).
Cleanthewindowwithacleancottonswab.
ThelifeofthetonercartridgehasbeenexpiredReplacethetonercartridge.
Someforeignsubstancesareonthewindowofthetoner
cartridgeframe.
Removetheforeignmatteroftheexposurewindow.
Ifthefuserisdefective,voidsoccurperiodicallyatthetop
ofablackimage.
Reinstallthefuserunit.
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