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CHAPTER 4 OPERATION
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
Cartridge
1.Primary charging
7.Drum cleaning
Delivery
6.Fixing
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.
4-2
COPYRIGHT © 2001 CANON INC.
Static image formation block
2.Laser exposure
4.Transfer
5.Separation
flow of paper
rotation of drum
F04-101-02
2000 2000 2000 2000
3.Development
Registration
Cassette
CANON SmartBase PC1200s/iR1200s REV. 0 DEC. 2001
Manual feed tray
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Troubleshooting
