Canon Color imageRUNNER LBP5280, Service Manual, Page: 24 / 284

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Technical Reference > Image Formation System > Construction > Image-formation Process
Technical Reference > Image Formation System > Construction > Image-formation Process
Image Formation System
Construction
■ Outline
The image-formation system is the central hub of the printer. It forms the toner image on the
media.
The following are the main components of the image-formation system:
• Four cartridges
• ITB
• Laser scanner unit
• Fixing assembly
The DC controller controls the laser scanner unit and high-voltage power supply to form
the toner image on the photosensitive drums according to the VIDEO signals. The image is
transferred to the print media through the ITB and fixed.
DC Controller
High-Voltage Power Supply
Laser Scanner
ITB
Fixing
Assembly Cartridge
ITB Cleaning
unit
Secondary
Transfer Roller
Primary Transfer
Pad
Photosensitive
Drum
Laser Beam
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■ Image-formation Process
The image-formation process consists of the following nine steps divided among six functional
blocks:
Step 1: Primary charging
Step 2: Laser-beam exposure
Step 3: Development
Step 4: Primary transfer
Step 5: Secondary transfer
Step 6: Separation
Step 7: Fixing
Step 8: ITB cleaning
Step 9: Drum cleaning
Flow of paper
Rotation of ITB/
photosensitive drum
Block
Step
Static image formation block
2.Laser beam exposure
4.Primary tansfer
1.Primary charging
Transfer block
5.Secondary transfer
ITB cleaning
block
8.ITB cleaning
Registration
Pickup
Fixing block
Delivery
7.Fixing
6.Separation
Development
block
3.Development
Drum cleaning block
9.Drum cleaning
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