Samsung ML-451 Series - Page 218

4.AlignmentandTroubleshooting
►ErrorCode
U2–1111
►Errormessage
LSUFailure:#U2-1111.Turnoffthenon.
►Symptom
LSUmotordoesnotworknormally.(nREADYLSUsignaldetectionerror)
►Troubleshootingmethod
1)Turnthemachineoffthenon.
2)Iftheproblempersists,checkthefollowings.
3)ExecutetheLSUmotortestinEDCmode.CheckLSUmotoroperationsound.
4)Ifthereisnosound,removetherightcover.CheckiftheFFCcableonmainboard(CN18)isconnectedproperly.
(Picture-1)
5)ItitisOK,removethetopcover.CheckiftheLSUconnectorisconnectedproperly.(Picture-3)
6)CheckiftheLSUharnessisdefective.
7)ReconnecttheLSUharnessandthenexecutetheLSUmotortestagain.
8)IftheLSUmotorisnotoperated,replacetheLSU.
9)IftheLSUmotorisnotoperatedafterreplacingtheLSU,replacethemainboard.
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