Samsung Xpress C1810 series - Door Open Close It; Error #S5-3110 Call for Service

4.AlignmentandTroubleshooting
►ErrorCode
S2–4120
►Errormessage
DooropenCloseit
►Symptom
Doorisopenorthecoveropenswitchisdefective.
►Troubleshootingmethod
1)Checkifthefrontcoverisclosedperfectly.
2)Iftheerrorpersists,checkthatthecover-opensensorisworkingnormally.Ifitisdefective,replacetheHVPSboard.
►ErrorCode
S5–3110
►Errormessage
Error#S5-3110Callforservice
►Symptom
ThecommunicationerrorbetweenmainboardandOPEboardhasoccurred.
►Troubleshootingmethod
1)Turnthemachineoffthenon.
2)Iftheproblempersists,checkthefollowings.
a)ChecktheconnectionbetweenmainboardandOPEboard.Reconnecttheharness.
b)IftheconnectionisOK,replacethemainboardorOPEboard.
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