Toshiba e-STUDIO520 Service Manual page 86

3) The recovery blade picks up the scraped toner.
(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.
p
Uneven charge is applied to the drum during the next copy.
p
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.
p
The photoconductive drum becomes electrically conductive.
p
All the (-) charges remaining on the photoconductive drum are conducted to the ground.
p
The preparation for the next copy is completed.
e-STUDIO520/600/720/850 COPY PROCESS
Cleaning blade
Drum rotation
Cleaning brush
Flicker
Recovery blade
Fig.3-20
Discharge LED array
Fig.3-21
3 - 10
Drum
March 2005 © TOSHIBA TEC