Samsung CLX-8640 series

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4.Troubleshooting

a)Removetherearcoverafterremoving7screws.

b)Removethemaindriveunit.

(Referto3.3.9.MainDriveUnit)

i)Rotatethegearbyhand.

•Ifthemotoroperationisstiff,replacethemotor(JC31-00149A)

ii)MeasuretheresistancevaluewithDVM.

•Ifthemeasuredvalueisoutofthestandardarea(7~10ohm),replacethemotor(JC31–00149A)

c)Ifthemotorisnormal,measurethemotorsignalwithDVM.

•Ifthephaseoutputvoltageischangedin0~24V(8~10V),theoutputvalueisnormal.

•Ifthephaseoutputvoltageisnotchangedto0or24V,replacethemainboard(JC92–02429A).

Samsung CLX-8640 series - Page 258