Samsung MultiXpress M5370 Series - Page 360

4.Troubleshooting
►ErrorCode
U1–2117
U1–212x
U1–213x
U1–23xx
►Errormessage
FuserUnitFailure:#U1-21xx.Turnoffthenon.
FuserUnitFailure:#U1-23xx.Turnoffthenon.
►Symptom
Thetemperaturecontroloffuserunitisabnormal.Thefusertemperaturehasdroppedbelowthenormalvalue.
►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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