Brother 2060, Руководство по обслуживанию

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II-5
3. IMAGE FORMATION SYSTEM
3.1 Outline
The image formation system is the main part of the printer. The print information, after
input from the video controller circuit into the engine controller circuit as a TVDO signal,
forms a toner image on the photosensitive drum.
Then the toner image is transferred onto the paper by the transfer charging roller. The
image formation system is composed of the photosensitive drum the charging unit, the
developing unit and the cleaning unit.
3.2 Printing Process
The major part of the image formation system is contained in the cartridge, as shown in
Figure 2.5.
Figure 2.5
The cartridge used by the printer has a seamless photosensitive drum with the structure
shown in Figure 2.6. The outer layer of the drum consists of an organic photoconductor
(OPC); the base is aluminum.
The printing process can be divided into five major stages:
Figure 2.6
1. Electrostatic latent image formation stage
Step 1 Primary charge (-)
Step 2 Scanning exposure
2. Developing stage
Step 3 Development
Photoconductive layer
Base
Laser beam
Developing cylinder
Primary charging roller
Cleaning blade
Photosensitive drum
Static charge eliminator
Cartridge
Transfer charging roller
Blade
Paper