Image Forming Process - Canon MF8580Cdw Service Manual

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Technical Overview > Image Formation System > Image Forming Process > Static latent image forming block

Image Forming Process

■ Overview
The image forming process of this product is composed roughly of 6 blocks and 9 steps.
Block Step
1 Primary charging
Static latent image forming
block 2 Laser beam exposure Form a static latent image on the
3 Development
Development block
4 Primary transfer
Transfer block 5 Secondary transfer
6 Separation
Fixing block 7 Fixing
ITB cleaning block 8 ITB cleaning
Drum cleaning block 9 Drum cleaning
Delivery
Fixing block
Static image formation block
7. Fixing
2. Laser beam exposure
Development
1. Primary charging
6. Separation block
3. Development
Drum cleaning block
ITB cleaning
9. Drum cleaning
block
8. ITB cleaning
5. Secondary transfer
Transfer block
Registration
Pickup
2 Technical Overview > Image Formation System > Image Forming Process > Static latent image forming block
Description
Charge the photosensitive drum surface
negatively.
photosensitive drum.
Deposit toner to visualize the static latent
image.
Transfer the toner image on the
photosensitive drum to the ITB.
Transfer the toner image on the ITB to the
paper.
Separate the paper from the ITB.
Fix the toner image on the paper.
Clean the residual toner on the ITB.
Clean the residual toner on the
photosensitive drum.
T-2-11
Flow of paper
Rotation of ITB/photosensitive drum
Block
Step
F-2-18
■ Static latent image forming block
This block consists of 2 steps to form a static latent image on the photosensitive drum.
● Step 1: Primary charging
Before forming a static latent image, the photosensitive drum surface should be charged
negatively.
This product employs the method to charge the photosensitive drum directly from the primary
charging roller, applying the DC negative bias in order to negatively charge the photosensitive
drum surface.
Primary charging roller
Photosensitive drum
2-18
DC bias
F-2-19
2-18