Toshiba e-STUDIO281c Service Manual page 102

9) Blade cleaning
While eliminating the (+) charge on the photoconductive drum applied during the transfer stage, the
conductive blade recovers the toner left on the drum at the same time.
- Elimination of transfer charge
With this OPC photoconductive drum, (+) charge on their surface cannot be eliminated optically.
Therefore, (–) voltage is applied to the conductive blade, which is pressed against the drum, to
eliminate the (+) charge applied at the transfer process.
- 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.
e-STUDIO281c/351c/451c
COPY PROCESS
Surface potential of photoconductive drum
800V
0
± 800V
Elimina-
Transfer
tion of
transfer
charge
Fig. 3-20
Drum rotation
Conductive blade
Fig. 3-21
3 - 12
Discharge Charging
Recovery blade
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