AR-651 (serv.man7). Copy process - Sharp Copying Equipment Service Manual (repair manual). Page 9

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AR-651/810  COPY PROCESS  3 - 9
(9) Discharging
Discharging is a process of eliminating any (–)
charge remaining on the OPC drum before the next
charging process begins.
If discharging does not occur, the following
phenomenon could occur:
The (–) charge remains on the photoconductive
drum.
Uneven charge is applied to the drum during the
next copy.
The next copy has a double image. (Preceding image
appears.)
Solution :
Expose the entire surface of the OPC drum to the
light by the discharge LED array.
The OPC drum becomes electrically discharged.
All the (–) charges remaining on the OPC drum are
conducted to the ground.
The preparation for the next copy is completed.
Dischage LED array
Drum
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