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Chapter 2
2-8
The latent image formed on the photosensitive drum is transferred into a visible image by the toner on the developing cylinder and the transfer charging roller trans-
fers it onto a print paper. Then the transferred toner onto a paper becomes a permanent image by heat and pressure in the fixing unit. After the surface of the pho-
tosensitive drum is cleaned by the cleaning blade, the drum potential is uniformed by the primary charging roller to get ready for the next print.
F-2-7
2.4.1.2 Print Process
0011-2453
The principal process of the image formation is described in this paragraph.
The process can be broadly divided into 5 blocks with 7 steps. A toner image is formed on a print paper as it goes step by step in each block.
F-2-8
1. Electrostatic latent image formation block
Form an electrostatic latent image on the photosensitive drum.
Step 1: Primary charging (Charge the surface of the photosensitive drum uniformed negative potential)
Step 2: Laser beam exposure (Form an electrostatic latent image on the photosensitive drum)
2. Developing block
Make an electrostatic latent image on the photosensitive drum visible by applying the toner on.
Step 3: Development
3. Transfer block
Transfer a toner image on the photosensitive drum surface onto a print paper.
Step 4: Transfer (Transfer a toner on the photosensitive drum onto a print paper)
Step 5: Separation (Remove a paper from the photosensitive drum)
4. Fixing block
Fix a toner image on a print paper.
Step 6: Fixing
5. Photosensitive drum cleaning block
Clean the residual toner on the photosensitive drum.
Step 7: Drum cleaning
2.4.1.3 Electrostatic latent image formation block
0011-2454
This block consists of two steps and forms an electrostatic latent image on the photosensitive drum.
Laser/Scanner unit
Cleaning blade
Photosensitive drum
Primary charging roller
Cartridge
Developing cylinder
Transfer charging roller
Laser beam
Pressure roller
Fixing film unit
Engine controller PCB
Print command
VIDEO signals (VDO, /VDO)
Video controller PCB
Fixing unit
6. Fixing
Photosensitive drum cleaning block
3. Developing
Fixing block
Transfer block
Electrostatic latent image formation block
Developing block
2. Laser beam exposure
1. Primary charging
Delivery
Paper path
Rotational direction of the drum
5. Separation
4. Transfer
7. Drum cleaning
Pick-up
Содержание LBP3300 Series
Страница 1: ...Jan 19 2006 Service Manual LBP3300 Series LBP3300 ...
Страница 9: ...Chapter 1 PRODUCT DESCRIPTION ...
Страница 16: ...Chapter 2 TECHNICAL REFERENCE ...
Страница 43: ...Chapter 3 DISASSEMBLY AND ASSEMBLY ...
Страница 56: ...Chapter 4 MAINTENANCE AND INSPECTION ...
Страница 59: ...Chapter 5 TROUBLESHOOTING ...
Страница 63: ...Chapter 6 APPENDIX ...
Страница 68: ...Sep 19 2006 PARTS CATALOG LBP3300 LBP3360 ...
Страница 97: ......