Image Formation; Outline - Canon FC220 Service Manual

V. IMAGE FORMATION
A. Outline
Pressure roller
The copier is an indirect photorepro
graphic system constructed as shown in
Figure 1-501A.
The image formation process con
sists of seven steps as discussed below.
Step 1 : Primary charging (negative)
Step 2 : Image exposure
Step 3 : Development (AC and DC bias)
Step 4 : Transfer (negative)
Step 5 : Separation
Step 6 : Fixing
Step 7 : Drum cleaning
COPYRIGHT © 1998 CANON INC.
Copyboard glass
Scanning lamp
Primary charging roller
Cleaning
Fixing film
blade
Figure 1-501A
CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 1 GENERAL DESCRIPTION
Lens array
Developing blade
Photo-
sensitive drum
Static eliminator
Latent static Image Formation
1. Primary charging
7. Drum cleaning
6. Fixing
Delivery 5. Separation
: Flow of copy paper
: Rotation of drum
Figure 1-502A
The photosensitive drum has a layer
construction: the photoconductive layer
on the outside and the conductive alu
minum base, inside.
Figure 1-503A
Developing
cylinder
Transfer charging roller
2. Image exposure
3. Development
4. Transfer
Registration
Photoconductive layer
Aluminum base
Multifeeder
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