Image Stabilization Control - Canon imageRUNNER ADVANCE 4551i Service Manual

Primary
charging block
Laser exposure
block
Image Formation Process
Primary charging block
Laser exposure block
Developing block
Transfer block
Separation block
Drum cleaning block

Image Stabilization Control

At times, changes in the environment or wear on the machine can cause its image output to become unstable. To obtain a stable
image, the machine uses the following control mechanisms.
■ PASCAL Control
This control stabilizes gradation density characteristics on the image.
This control is executed when the following is selected in user mode: Auto Adjust Gradation > Full Adjust
Patch pattern on the test print is scanned by the Reader to create a gradation table.
Primary charging roller
Cleaning Blade
Developing cylinder
Charges the surface of the photosensitive drum to a uniform negative potential.
Exposes laser beam on the surface of the drum for charge neutralization to form the latent image
formation.
Causes the negatively-charged toner on the developingcylinder to adhere to the latent image for-
mation on the surface of the photosensitive drum to form a visible image.
Applies positive charge to the back of a paper to transfer the toner on the drum to the paper.
Separates a paper from the photosensitive drum with its elastic force and at the same time applies
negative charge to the back of paper to facilitate paper separation.
Scrapes off the residual toner on the surface of the drum using the cleaning blade and feeds it to
the waste toner container.
Drum cleaning block
Photosensitive drum
Developing block
Transfer charging roller
Transfer block
Description
91
2. Technology
Paper
Separation block
Static eliminator