Samsung ML-451 Series

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4.AlignmentandTroubleshooting

►ErrorCode

U2–1113

►Errormessage

LSUFailure:#U2-1113.Turnoffthenon.

►Symptom

LD(LaserBeamDetect)signalisabnormal.

►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.

Samsung ML-451 Series - Page 219