Toshiba e-STUDIO2500c Service Manual page 92

11)(–) 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 9)).
↓
Preparation for the next copying process is completed.
e-STUDIO2500c/3500c/3510c COPY PROCESS
Photoconductive
drum
Discharge LED
array
Fig. 3-22
3 - 12
May 2006 © TOSHIBA TEC