Samsung CLX-8640ND - Page 427

4.Troubleshooting
7)Blankcopy,Blackcopy
StepSectionCheckitemResultAction
1Ablankcopyoccurs.YesCheckLSUconnectorforproper
connection.
2
Imagecheck
AblackcopyoccursY esCheckHVPSconnectorforproper
connection,especially,Corona
ChargerandGridV oltage
3DrumUnitTheOPCdrumchargecoronavoltage
contactofOPCdrumgroundcontactofthe
drumunitisconnectedproperly.
NoCheck,clean,orcorrectthe
contact.
4AllconnectorsonHVPSboardare
connectedcorrectly.
NoReconnect.
5
HVPSboard
Theproblemhasbeeneliminatedthrough
thecheckofstep5.
NoReplacetheHVPSboardorMain
boardorLSU.
6ScannerCheckiftheconnectionbetweenscanjoint
boardandmainboardisOK.
NoReconnect.
IftheconnectionisOK,replace
themainboard.
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