Image Formation System; Overview; Parts; Image Forming Process - Canon MF720 Series Service Manual

Image Formation System

Overview

The image formation system holds the core function of this product to form toner images on paper.
To form toner images, the DC controller controls various high-voltage power supply PCBs.
This product is a compact and high-speed color printing device that employs the 4-drum and intermediate transfer method.
The image formation system is composed of the following components.
• 4 cartridges
• ITB unit
• Secondary transfer external roller
The figure below shows the image formation system schematically.
ITB cleaning unit

Parts

ITB Cleaning Brush
Secondary Transfer
Internal Roller
Secondary Transfer
External Roller

Image Forming Process

■ Overview
The image forming process of this product is composed roughly of 6 blocks and 9 steps.
Fixing
unit
Cartridge
ITB
Secondary transfer
external roller
High-voltage power supply
DC controller
ITB Cleaning Roller
Y
ITB Unit
Laser scanner
Laser beam
Developing Cylinder
M C
Primary
Transfer Pad
30
2. Technical Explanation
Photosensitive drum
Primary transfer pad
Toner Cartridge
Photosensitive
Drum
Bk
Color Displacement
/Density Sensor