CHAPTER 1 GENERAL DESCRIPTION
COPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
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B. Static Latent Image Formation Block
The static latent image formation block consists of three steps, at the end of which
negative charges are left in the areas of the photosensitive drum corresponding to the
black areas of an original while removing negative charges from the areas of the
photosensitive drum corresponding to the white areas of the original.
The static image formed on the photosensitive drum is not visible to the human eye
and, therefore, is called a static latent image.
Figure 1-604
C. Pre-Exposure (step 1)
Figure 1-605
In preparation for primary charging, the light from the pre-exposure lamp is shone
on the photosensitive drum surface, thereby removing the residual charges from the
photosensitive drum surface and, ultimately, preventing uneven copy density.
Surface potential (V)
Pre-exposure
(step 1)
Image exposure (step 3)
Dark area
Light area
Time (t)
0
500
Primary charging
(step 2)
Pre-exposure lamp
Содержание NP6330
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