COPYRIGHT © 2002 CANON INC.
2000 2000 2000 2000
CANON iR1200/iR1300 Series REV. 0 AUG. 2002
CHAPTER 4 OPERATION
4-2
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,
and 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
flow of paper
rotation of drum
Static image formation block
Cartridge
1.Primary charging
2.Laser exposure
3.Development
4.Transfer
5.Separation
6.Fixing
7.Drum cleaning
Registration
Manual feed tray
Cassette
Delivery
F04-101-02
The machine’s sequence of operation is controlled by the CPU on the image processor
PCB and the CPU on the DC controller PCB. F04-101-03 shows the sequential flow, and
T04-101-01 provides descriptions of the periods involved. For a timing chart, see Appendix.