Print Process - Canon LBP-1120 Service Manual

CHAPTER 2
B. Print Process
The major portion of the image formation system is contained in a cartridge as shown in Figure 2-4-2.
Primary charging roller
Cleaning blade
Photosensitive drum
Static charge eliminator
The cartridge used by the printer contains a two-layered seamless as shown in Figure 2-4-3.
The seamless drum consists of an external organic photoconductive layer (OPC) and an internal aluminum substrate.
The printing process can be divided into five major stages.
1. Electrostatic latent image formation stage
Step 1: Primary charging (-)
Step 2: Scanning exposure
2. Developing stage
Step 3: Developing
3. Transfer stage
Step 4: Transfer (+)
Step 5: Separation
4. Fixing stage
Step 6: Fixing
5. Drum cleaning stage
Step 7: Drum cleaning
2 - 24
Laser beam
Cartridge
Blade
Developing cylinder
Transfer charging roller
Figure 2-4-2
Photoconductive
layer
Substrate
Figure 2-4-3