Canon NP2120 Service Manual page 35

F o r m a t i o n o f Electrostatfc Latent I m a g e Separation
r - - - - - - - - - - - - - - - - - --------_ 1
8 . D r u m cleaning
7 . Fixing
The photosensitive drum is of a two-layer construc-
tor (OPC), and the inner layer is an aluminum base
made of conducting material.
Figure 2-3
2. Formation of Electrostatrc Latent Image
This block consists of the first three steps of the
image formation process; at its end, the areas of the
drum corresponding to dark areas of the document
areleftwith negativecharges, andthoserepresenting
The pattern of charges so formed is not visible to
the human eyeand, therefore, iscalled an electrostatic
3. I m a g e e x p o s u r e
4 . Development
5 . Transfer c o r o n a exposure
Figure 2-2
- 5 0 0 -
P r e - c o n d i t i o n i n g P r i m a r y c o r o n a
3. Step 1 Pre-conditionrng exposure
C A N O N NP2120/2MO R N . 0 M A Y 1990 PRINTEO I N J A P A N IIMPAIME AU JAPONI
M a n u a l f e e d tray
T i m e
,
Light area
D a r k area
I m a g e e x p o s u r e (step 3)
Figure 2-4
Figure 2-5