Canon MF8580Cdw Service Manual page 48

2
Technical Overview > Image Formation System > Image Forming Process > Development block
● Step 2: Laser beam exposure
Expose the photosensitive drum with laser beams to form a static latent image.
The static latent image is formed by laser beam scanning that neutralizes or strips negative
potentials on the scanned parts.
Unexposed area
2 Technical Overview > Image Formation System > Image Forming Process > Development block
Laser beam
Exposed area
F-2-20
■ Development block
The static latent image formed on the photosensitive drum is visualized by toner deposited in
this block.
● Step 3: Development
Toner is deposited on the static latent image formed on the photosensitive drum.
Toner is then charged negatively through friction between the developing cylinder and the
developing blade surface. The DC bias is applied to the developing cylinder to generate
potential difference from the photosensitive drum. When the negatively charged toner
contacts the photosensitive drum, it is deposited on the static latent image due to potential
difference between the drum and the developing cylinder.
Developing cylinder
DC negative bias
Exposed area
Unexposed area
Photosensitive drum
2-19
Developing blade
Unexposed area
Exposed area
F-2-21
2-19