Latent Static Image Formation Block - Canon CP660 Service Manual

CHAPTER 1 GENERAL DESCRIPTION
B.

Latent Static Image Formation Block

This block consists of three steps, performed to generate a latent static image on the
photosensitive drum.
At the end of the last step in this block, the dark areas of the drum which have not
been exposed to the laser beam retain negative charges, while the light areas of the
drum which have been exposed to the laser beam are rid of negative charges.
The image on the drum formed by negative charges is not visible to the human eye,
and therefore is called "latent static image."
0
-100
Surface
potential
(V)
-500
Pre-exposure
(step 1)
1-22
COPYRIGHT © 1999 CANON INC.
Download free service manual at http://printer1.blogspot.com
Light area
Primary charging
Laser beam exposure
(step 2)
(step 3)
Figure 1-803
Time (t)
Dark area
Pre-exposure
Primary transfer
(step 5)
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Primary charging
(step 1)
(step 2)