Samsung CLX-8640ND - Prepare New Black Developer Unit; Replace with New Black Developer Unit. Call for Service; Black Developer Failure: #C8-5210. Turn off then on; Black Developer Failure: #C8-5310. Install Black Developer Unit Again

4.Troubleshooting
►ErrorCode
C8–5110
C8–5125
►Errormessage
Preparenewblackdeveloperunit
Replacewithnewblackdeveloperunit.Callforservice
►Symptom
Thelifeoftheblackdeveloperunitexpiressoonorhasexpired.
►Troubleshootingmethod
1)Ifitslifeisattheend,turnthemachineoffandreplacethedeveloperunitwithnewone.
(Referto3.2.2DeveloperUnit.
)
►ErrorCode
C8–5210
C8–5310
C8–5313
►Errormessage
BlackDeveloperFailure:#C8-5210.Turnoffthenon
BlackDeveloperFailure:#C8-5310.Installblackdeveloperunitagain
BlackDeveloperFailure:#C8-5313.Turnoffthenon.Pleasecallforserviceiftheproblempersists
►Symptom
Theblackdeveloperunithasaproblemwithtonersupplyorsensorcalibration.
►Troubleshootingmethod
1)Openthefrontcover.
2)Removethewastetonercontainer.
3)Checkifthetonersupplypipeisblocked.Ifitisclosed,openit.
4)Installthewastetonercontainer.Closethefrontcover.
5)Turnthemachineoffthenon.
6)Iftheproblempersists,removeandreinstalltheblackdeveloperunit.
7)Iftheproblempersists,replacetheblackdeveloperunit.
(Referto3.2.2DeveloperUnit.)
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