Canon PC1000s Service Manual page 156

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 sewing 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
Static image formation block
r _ _ _ _ _ _ - _ _ _ _ _ _ - - - - _ - - - _ _ - - - -
Cartridge
I
I
I
I
2.laser exposure
I
I
I _ _ _ _ _
I
7.Drum cleaning
.
Registration
Delivery 6.Fixing
Cassette
4 - flow of paper
+
- -
rotation of drum
F04- 1 0 1 -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.
COPYRIGHT02002 CANON INC.
CANON Kt 000slimageCLASS
DGM)s
REV.
1
AUG.2002