Image Formation System; Image Formation Process - Canon LBP351 Series Service Manual

Image Formation System

Image Formation Process

■ Outline
The image formation process consists of the following seven steps divided among five functional blocks:
Latent image formation block
• Step 1: Primary charging
• Step 2: Laser-beam exposure
Developing block
• Step 3: Developing
Transfer block
• Step 4: Transfer
• Step 5: Separation
Fixing block
• Step 6: Fixing
Drum cleaning block
• Step 7: Drum cleaning
Delivery
■ Latent image formation block
During the two steps that comprise this block, an invisible latent image is formed on the photosensitivedrum.
Step 1: Primary charging
To prepare for latent image formation, the surface of the photosensitive drum is charged with a uniform negative potential. The
primary charging bias is applied to the primary charging roller and the roller charges the drum directly.
Media path
Latent image formation
Direction of
the drum rotation
Block
Step
1. Primary charging
Drum cleaning
7. Drum cleaning
6. Fixing
Fixing
Primary charging roller
Photosensitive drum
2. Laser-beam exposure
3. Developing
5. Separation 4.Transfer
Transfer
Primary charging bias
16
2. Technical Explanation (Device)
Developing
Pickup