Canon LBP1760P, Service Manual

Page: 71 / 394

Step 2: Laser beam exposure
Figure 2-4-7
When the laser beam scans the drum surface, it causes the charges in the areas struck by the
laser beam to be neutralized. These areas on the drum surface form the electrostatic latent
image.
2. Developing block
Particles of toner are placed onto the electrostatic latent image on the surface of the drum to
form a visible image. This printer uses the toner projection development method with a single-
component toner.
Step 3: Developing
Figure 2-4-8
Note: Charges in the exposed areas of the photosensitive drum are shown as positive in this
figure, even though they are actually negative. It means that the photosensitive drum
potential is higher as compared with that of cylinder.
2 - 33
CHAPTER 2
Laser beam
Unexposed area Exposed area
Blade
Stirrer
Photo-
sensitive
drum
AC bias
DC bias
Developing cylinder
Cylinder
Magnet