Samsung SCX-4729FW - Scanner Locked

4.AlignmentandTroubleshooting
►ErrorCode
S3–3121
►Errormessage
ScannerLocked.
►Symptom
CISunitinthescannerdoesnotmove.
►Troubleshootingmethod
1)CheckiftheCISunitmoveswhenturningthemachineoffthenon.
2)CheckiftheCIScableisconnectedcorrectly.Reconnectit.
3)IftheCISunitisdefective,replaceit.
4)Checkifthereisanydefectivepartinthescanner.Findandreplaceit.
5)Iftheproblempersists,replacethemainboard.
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