Samsung CLX-8640ND - U2-XXXX Type (LSU) Error Code

4.Troubleshooting
4.6.8.U2-xxxxtype(LSU)errorcode
►ErrorCode
U2–6121
U2–6122
U2–6123
►Errormessage
LSUFailure:#U2-6121.Pleaseturnoffthenon.
LSUFailure:#U2-6122.Pleaseturnoffthenon.
LSUFailure:#U2-6123.Pleaseturnoffthenon.
►Symptom
LSUmotordoesnotoperateoritoperatesabnormally.Motorreadysignalisabnormal.
►Troubleshootingmethod
1)Turnthemachineoffthenon.CheckfortheLSUmotoroperationsoundduringwarm-up.
2)Printademopagetocheckthatthemachineoperatesnormally.
3)Iftheproblempersists,checkthefollowing:
•IftheLSUmotormakesasound,
a)EnterSVCmodetochecktheLSUmotorreadysignal.
(Diagnostics>EngineDiagnostics>EngineTestRoutines)
-Press1,2,3numberkeyssimultaneously.Whenthepassworddialogboxappears,enter“1934”and
pressthe“OK”button.
b)Select“LSUMotor1RunReady”.(Diagnostics>EngineDiagnostics>EngineTestRoutines>
110-0000)
c)Press‘Start’button.Checkthatthestatushaschangedto‘Executing->Low->High’.
d)Ifthestatushasnotchanged,themotorreadysignalisabnormal.ReplacetheLSU(JC97-04073A).
(Referto3.3.6.LSU
)
•IftheLSUmotordoesnotmakesasound,
a)Turnthemachineoffandopenthesidecover.UnplugandreconnecttheLSUcable.(JC39-01743A:Motor
Harness,JC39-01791A:Flatcable)CheckthattheLSUmotormakeasoundafterturningthemachineon.
b)IftheLSUCable(JC39-01743A:MotorHarness,JC39-01791A:Flatcable)isdefective,replaceit.Check
thattheLSUmotormakeasoundafterturningthemachineon.
c)Iftheproblempersists,replacetheLSU(JC97-04073A).
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