Canon LBP-2000 Service Manual download pdf (Page 80)

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CHAPTER 2

Step 2: laser beam exposure

Laser beam

Dark area Light area

Figure 2-4-7

When the laser beam is run across the photosensitive drum, the charges in the light area become

neutralized, forming a latent static image.

2 . Developing block

In this block, toner is deposited to cover the latent static image on the surface of the photosensi-

tive drum, thus turning it into a visible image.

The Printer uses a toner projection development method, and its toner is a 1-component type.

Step 3: development

Photosensitive

drum

Developing cylinder

Blade

Stirring rods

AC bias

DC bias

Figure 2-4-8

Note: The light area of the surface of the photosensitive drum actually carries a negative poten-

tial, but the diagram expresses it as carrying a positive potential. The fact indicates that

the potential of the photosensitive drum is higher than that of the cylinder when the latter

is used as the point of reference.

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Canon LBP-2000 Service Manual Page 80