e-STUDIO520/600/720/850 COPY PROCESS March 2005 © TOSHIBA TEC
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3) The recovery blade picks up the scraped toner.
Fig.3-20
(9) Discharging
Discharging is a process of eliminating the (-) charge remaining on the photoconductive drum before
the next charging process begins.
If discharging does not occur, the following phenomenon will 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 photoconductive drum to the light by the discharge LED array.
!
The photoconductive drum becomes electrically conductive.
!
All the (-) charges remaining on the photoconductive drum are conducted to the ground.
!
The preparation for the next copy is completed.
Fig.3-21
Cleaning blade
Drum rotation
Flicker
Recovery blade
Cleaning brush
Discharge LED array
Drum
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