Canon LBP-2000, Service Manual

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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
N o t e : 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.