Canon iR1200 Series Service Manual page 112

Chapter 3
The machine has a cartridge construction, in which the drum, toner housing, primary charging assembly, developing
cylinder, and cleaning blade are designed as a single entity (items serving as the core of image formation).
It uses SURF as its fixing method, in which a fluorine-coated film is heated by a heater, nd paper is moved between
the film and the fixing pressure roller (the image is fused by the work of heat and pressure.)
The machine's image formation processes are as follow:
Step 1 Primary charging (AC and negative DC)
Step 2 Laser exposure
Step 3 Development (AC and negative DC)
Step 4 Transfer (positive DC)
Step 5 Separation
Step 6 Fixing
Step 7 Drum cleaning
3-8
Copyboard glass
Contact sensor
Image processing block
Laser scanner assembly
Primary charging roller
Cleaning blade
Fixing assembly
Static eliminator
Transfer charging roller
Cartridge
Photosensitive drum
Paper
F-3-4
Developing
cylinder
Paper
Vertical path roller