Image Formation System; Outline; Image Formation Process - Canon imageCLASS LBP6780dn Service Manual

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Technology > Image Formation System > Image Formation Process > Outline

Image Formation System

Outline

The image formation system forms a toner image on print media.
The following are the main components of the image formation system:
• Cartridge
• Transfer roller
• Fixing unit
• Laser scanner
The DC controller controls the laser scanner and high-voltage power supply to form the toner
imageon the photosensitive drum. The image is transferred to the print media and fixed.
Diagram of the image formation system is shown below.
Laser beam
Laser scanner
Fixing unit
High-voltage power supply
DC controller
Engine controller
2 Technology > Image Formation System > Image Formation Process > Outline
Cartridge
Transfer roller
F-2-3

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
: Media path
: Direction of drum rotation
: Block
Latent image formation
: Step
2. Laser-beam exposure
1. Primary charging
Drum cleaning 7. Drum cleaning
Delivery
6. Fixing 5. Separation
Fixing
2-5
Developing
3. Developing
Pickup
4. Transfer
Transfer
F-2-4
2-5