Canon 1000 Service Manual page 32

2. COPYING PROCESS
For each process color, the CLC1000 uses
one set of components; i.e., photosensitive drum,
developing assembly, cleaning unit. (In other
words, four sets are used for full color
reproduction.)
The CLC1000's photosensitive drum consists
of a photo-conductive layer on the other side
(OPC) and a conductive aluminum substrate on
the inside.
The CLC1000 differs from black-and-white
copiers for the following:
Light is shined on a color original, and the
reflected light is separated by filters into the three
primary colors of light for conversion by a CCD.
Using analog video signals (RGB) from the
CCD, video signals are generated for each
process color (YMCK) to drive a semiconductor
laser.
A laser beam is directed to the appropriate
photosensitive drum to develop the image
representing the corresponding process color (of
toner; complementary to the corresponding filter)
for transfer to paper; the step is executed alike for
Y, M, C, and K.
The resulting image is fixed to the paper,
producing a color copy of the original.
The CLC1000 uses four photosensitive drums
for transfer of images to paper, and a transfer belt
is used to ensure that paper is moved horizontally
under each photosensitive drum for transfer.
Delivery
7. Fixing
2-2
COPYRIGHT © 2001 CANON INC.
2. 2.
2.
Bk C M
1. 1.
1.
8. 8. Drum cleaning
8. 8.
6. Separation 5. Transfer
Figure 2-102
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
The image formation block consists of the
following eight steps:
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Auxiliary processes include pre-primary
charging, pre-fixing charging, and transfer belt
cleaning/static elimination.
Static Latent Image Formation Block
2. Primary charging
Y
1.
Pre-exposure
3. Laser exposure
4. Development
5. Retention/transfer
Duplexing tray
Cassette 1
Cassette 2
Pre-exposure
Primary charging
Laser exposure
Development
Retention/transfer
Separation
Fixing
Photosensitive drum cleaning
Manual feeding
Registration
Paper deck