HP color laserjet 2550 series Manuale Di Servizio
Note
The charges on the exposed area on the drum are shown as positive in
. The charges are actually negative, but they are more positive than the
charges on the developing cylinder.
Figure 4-18.
Developing block
Step 3: auxiliary developing
The dc bias applied to the blade imports a uniform negative potential to the toner.
Step 4: developing
Toner acquires a negative charge through friction from the developing cylinder and the
blade. When the negatively charged toner comes in contact with the drum, the toner adheres
to the electrostatic latent image. The image on the drum becomes visible because of the
toner.
blade. When the negatively charged toner comes in contact with the drum, the toner adheres
to the electrostatic latent image. The image on the drum becomes visible because of the
toner.
Figure 4-19.
Step 3: developing
Transfer stage
ENWW
Image-formation system
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