Samsung MultiXpress M5370 Series - Page 361

4.Troubleshooting
►ErrorCode
U1–234J
U1–234P
►Errormessage
FuserUnitFailure:#U1-234J.Turnoffthenon.
FuserUnitFailure:#U1-234P .Turnoffthenon.
►Symptom
Thetemperaturecontroloffuserunitisabnormal.Thefusertemperaturehasrisenabovethenormalvalue.
►Troubleshootingmethod
CAUTION
ThetemperaturegetshotaroundtheFuserUnit.Topreventburns,makesuretheFuserUnitareaiscoolbefore
performingthisprocedure.
1)Turnthemachineoffthenon.
2)Turnthemachineoff.Re-installthefuserunit.Thenturnthemachineon.
3)Iftheproblempersists,removethefuserunit.
4)Checkthefusercomponents.
•Checkifthethermistorisassembledcorrectly.
•Checkifthethermostatisconnected.
•Checkifthecenterandsidelampsareinshortstatus.(Measuretheresistancevaluebetweenthecommon-center
andcommon-side.)
5)Ifthereareanydefectivepartsinstep5,replacethefuserunit.
6)Iftheproblempersists,replacethesepartsinregularsequence.
•FuserDriveBoard
•Mainboard
•SMPSboard
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