Basic Sequence Of Operations (Copying) - Canon CLC 1120 Service Manual

CHAPTER 2 BASIC OPERATION
B. Basic Sequence of Operations (copying)
Figure 2-202 shows the basic sequence of operations executed during copying.
Photosensitive drum revolution
Transfer drum revolution
Side A sensor (PS2)
Side B sensor (PS3)
Scanner motor (PM15)
Scanning lamp (LA2)
Laser
Registration sensor (PS70)
Attraction high-voltage output
Pre-exposure lamp (LA1)
Post-cleaning high-voltage output
Primary high-voltage output
Developing bias DC component
Developing bias AC component
Transfer high-voltage output
Separation high-voltage output
Internal/external static eliminating
high-voltage output
Main motor (M4)
Drum motor (M2)
Figure 2-202 A4/LTR, 2 Copies, Full Color, Direct, Cassette 1
DSRDY (scanner ready)
INTR (initial rotation)
COPY (copy)
LSTR (last rotation)
2-6
COPYRIGHT © 1999 CANON INC.
Copy Start key ON
DSRDY INTR
1
1
M
M
M
[1] Shading correction [2] Drum surface potential control
Period
From when the Copy Start key is
pressed until when the transfer
drum starts to rotate.
From when DSRDY ends to when
attraction of copy paper is
started.
From when attraction of copy
paper to the transfer drum starts
to when all toner is deposited
on copy paper.
From when COPY ends to when
the drum motor stops.
Table 2-202
COPY
2 3 4
2 3 4
M C C Y Y K
K
C Y
K
C Y
M M C C
Y Y
Performs an original detection
scan.
Picks up copy paper.
Turns on and off the laser by
video signals, and develops and
transfers the selected color.
Discharges copy paper. The transfer
drum is freed of charges (cleaned).
Stabilizes the sensitivity of the
photosensitive drum, and measures
and controls the surface potential of
the drum. Takes measurements for
shading correction.
CANON CLC1120/1130/1150 REV.0 MAR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
LSTR
5 6 7
5 6 7
[1]
[2]
K
K K
Purpose
STBY
8
8