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November 2003 © TOSHIBA TEC 3 - 9 e-STUDIO3511/4511 COPY PROCESS
3
Conductive blade
(10) Discharging process
Discharging is a process of eliminating the (–) charge
remaining on the photoconductive drum before the next
charging process.
If the charge remaining on the photoconductive drum
is not eliminated, the following phenomenon would
occur:
(–) charge remaining on the photoconductive drum
surface causes uneven application of the charge for
the next copying.
The next copy obtains a double image. (The preceding
image remains.)
To prevent this :
The entire surface of the photoconductive drum
is flooded with light by the discharge LED array.
The photoconductive drum becomes electrically
conductive.
All of the (–) charge remaining on the
photoconductive drum is conducted away to
ground (However, (+) charge is eliminated by
the conductive blade as mentioned in (8)).
Preparation for the next copying process is
completed.
Photoconductive
drum
Discharge LED
array
Drum rotation
Recovery blade
• Cleaning
The edge of the conductive blade is pressed
against the photoconductive drum surface to scrape
off residual toner. The toner removed is then caught
by the recovery blade.
Fig. 3-317
Fig. 3-318
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