Image Formation; Outline - Canon CP660 Service Manual

CHAPTER 1 GENERAL DESCRIPTION
VIII. IMAGE FORMATION
A.

Outline

Face-up
delivery
The machine's photosensitive medium is a seamless drum, and is constructed as
shown in Figure 1-701. The photosensitive drum consists of a photoconducting layer
(organic photosensitive conductor, OPC) on the outside and an aluminum base (con-
ductor) on the inside.
The printer unit forms images as follows:
A color original is exposed to light, and the light reflected by the original is separated
into three primary colors for detection by a CCD. Using the data from the CCD, a laser
beam is directed to the photosensitive drum to develop a specific color (complementary
of the filter in question), and the resulting image is transferred to the intermediate trans-
fer drum (primary transfer). This series of processes is repeated for each color (Y, M, C,
and Bk) in sequence.
The toner image on the intermediate transfer drum is then transferred to paper (sec-
ondary transfer), and fused to generate a color print.
1-20
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Scanning lamp
Face-down delivery
Black toner
cartridge
Developing rotary
assembly
Color toner
cartridge
ITD cleaning
Upper fixing roller
Lower fixing roller
Separation static
eliminator
Duplexing unit
Cassette 1
Cassette 2
Figure 1-801
CCD
Lens
Image processing
assembly
Laser scanner
assembly
Primary charging
rollen
Pre-exposure LED
Photosensitive
drum
Intermediate transfer
drum (ITD)
Registration roller
Secondary transfer belt
Pick-up roller
Feeding roller
Pick-up roller
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Waste toner case
Secondary pre-transfer
charging assembly
Density
sensor
Multifeeder
Separation roller
Feeding roller
Separation roller