Image Formation Process; Electrostatic Latent Image Formation Block - Canon MF8100 Series Service Manual

Chapter 2

2.3.1.2 Image Formation Process

An image formation process is the basic procedures of operations for image formation.
The process can be divided into 5 blocks and 12 steps. By performing steps in each block, a toner image is formed on paper.
The following are the blocks and steps of the image formation process.

1) Electrostatic latent image formation block

Forms an electrostatic latent image on the photosensitive drum.
Step 1: Primary charging - A uniform negative charge is applied onto the surface of the drum.
Step 2: Laser beam exposure - An electrostatic latent image is formed on the drum.
2) Developing block
Turns an electrostatic latent image on the drum to a visible image by applying the toner onto it.
Step 3: Auxiliary development
Step 4: Development
3) Transfer block
Transfers a toner image on the drum on paper.
Step 5: Primary transfer - Toner on the drum is transferred to the ITB.
Step 6: Secondary transfer - Toner on the ITB is transferred to paper.
Step 7: Separation - Paper separates from the ITB.
4) Fixing block
Fuses a toner image onto paper.
Step 8: Fixing
2-8
Toner cartridge
VDO
Memory tag
Developing
rotary
Fixing unit
ITB Auxiliary
cleaning ITB cleaning
roller roller
VIDEO
Print command
signal
1. Electrostatic latent image formation block
2. Laser beam exposure
2. Developing
3. Auxiliary development
block
4. Development
Delivery
5. ITB cleaning block
1 1. ITB cleaning
10. ITB cleaning roller charging
9. Auxiliary ITB cleaning roller charging
8. Fixing
4. Fixing block
Paper path
Directions of rotation
ITB
Primary charging roller
Developing
cylinder
Blade
Photo
sensitive
drum
SUB-
H.V.T
H.V.T
F-2-12
1. Primary charging
Photosensitive
drum
12. Drum cleaning
ITB
5. Primary transfer
6. Secondary transfer
7. Separation Registration
3. Transfer block
F-2-13
Memory tag
Primary transfer
roller
Image cartridge
Secondary transfer
roller
Multi-purpose tray pick-up
0007-4977