Service manual

Chapter 2
2-8
F-2-12
2.3.1.2 Image Formation Process
0007-4977
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.
F-2-13
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
Photo
sensitive
drum
ITB
Fixing unit
Developing
rotary
Blade
Memory tag
Primary transfer
roller
Secondary transfer
roller
Image cartridge
Toner cartridge
Primary charging roller
VDO
Memory tag
DCNT board
SCNT board
H.V.T
Print command
VIDEO
signal
SUB-
H.V.T
ITB
cleaning
roller
Auxiliary
ITB cleaning
roller
Developing
cylinder
4. Fixing block
3. Transfer block
1. Electrostatic latent image formation block
2. Developing
block
Delivery
8. Fixing
12. Drum cleaning
Registration
9. Auxiliary ITB cleaning roller charging
Multi-purpose tray pick-up
Paper path
Directions of rotation
ITB
Photosensitive
drum
5. Primary transfer
6. Secondary transfer
5. ITB cleaning block
10. ITB cleaning roller charging
1 1. ITB cleaning
7. Separation
1. Primary charging
2. Laser beam exposure
4. Development
3. Auxiliary development