Development Block - Canon LBP3250 Series Service Manual

Chapter 2

2.4.1.4 Development Block

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This block is comprised of one step; it puts toners to the static latent images on the surface of the photosensitive drum and visualizes the images using toner pro-
jection development. The toner projection development makes the toner jump on the surface of the photosensitive drum and develops the images.
The toner (developer) used for this equipment is a one-component toner that comprises magnetic body and resin, etc.
Step 3: Development
Toner is affixed to static latent images on the surface of the photosensitive drum.
The toner is charged negatively by friction between the developing cylinder and the surface of the developing blade.
An area on the photosensitive drum exposed with laser beam has higher potential than the developing cylinder; the potential difference between the drum surface
and the cylinder enables the toner to jump on the drum surface and makes them visible images.
AC bias superimposed with the development DC negative bias is applied to the developing cylinder.
Blade
Developing cylinder
AC bias
Unexposed area
Exposed area
Exposed area
Unexposed area
DC bias
Photosensitive drum
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