Printing Process; Basic Process; The Print Unit; Printing Stages - Canon LBP-CX Series Service Manual

2. Printing process
a. Basic process
Fixing roller
cleaner felt
Lower roller
Beam-to-drum mirror
Laser unit
Primary , ,, ,
"(~-~
- \ \ _
corona ass y
___,..~
J Cleaner
,, ,, " blade
,
I
Dustproofing glass
,------
-----------
..
I
I
- J
I
Figure 2-11 The
~rint
unit
Scanning
mirror
This printer has a seamless photosensitive drum
with the structure shown in Fig. 2-12. The drum
consists of an outer layer of an organic photo-
conductor (OPC) on a conductive aluminum base.
The image-forming process can be divided into
seven steps. The first three steps constitute one stage,
while each other stage is a single step.
2-8
Photoconductive
layer
1)
Electrostatic latent
I
Step 1 Preconditioning
image formation exposure
stage Step 2 Primary corona
Step 3 Scanning exposure
2) Development stage Step 4 Development
3) Transfer stage Step 5 Transfer
4) Fixing stage Step 6 Fixing
5) Drum cleaning stage - Step 7 Drum cleaning
Figure 2-12
Print
deliver
Electrostatic latent image formation stages
r- - - - - - - - - - - - - - - - - - - - - - - - - - - - - -,
I I
I
I
I
I
I
I
I
I
I t _______ _
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ J
Drum cleaning
stage
r - - - - - - -
-----
-..,
1
I
7. Drum cleaning
!_ ______ _
-- - _ J
Direction of drum rotation
Figure 2-13 Printing stages
COPYRIGHT
©
BY CANON INC. CANON LBP-CX SERIES REV.2 JULY 1985 PRINTED IN JAPAN (IMPRIME AU JAPOlll