Canon PC720 Service Manual - Page 80

OPERATIONS, controller, Singlefeeder, paper, sensor, COPYRIGHT, CANON, PC720I740fT50770, REV.0, AUG.

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Page 80 highlights

MEMOPERATIONS AND TIMING''. 3. Controlling the Singlefeeder Pick-Up Roller The singlefeeder pick-up roller is con- trolled by the singlefeeder paper sensor (PS7). When copy paper is inserted into the singlefeeder assembly, the single feeder paper sensor turns on; the main motor (M1) starts to rotate automatically as soon as the single feeder paper sensor turns on. When the main motor (M1) rotates, the single feeder pick-up roller starts to rotate to move the copy paper to the registration roller, which controls the copy paper so that its leading edge matches the leading edge of the image on the photosensitive drum. DC controller PCB 0 U- PA1 O Copy paper Singlefeeder paper sensor (PS7) Figure 3-403 3 - 40 COPYRIGHT © 1994 CANON INC. CANON PC720I740fT50770 REV.0 AUG.1994 PRINTED IN JAPAN ompRitit AU JAPON)

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MEM
OPERATIONS
AND
TIMING''.
3.
Controlling
the
Singlefeeder
Pick
-Up
Roller
The
singlefeeder
pick-up
roller
is
con-
trolled
by
the
singlefeeder
paper
sensor
(PS7).
When
copy
paper
is
inserted
into
the
singlefeeder
assembly,
the
single
feeder
paper
sensor
turns
on;
the
main
motor
(M1)
starts
to
rotate
automatically
as
soon
as
the
single
feeder
paper
sensor
turns
on.
When
the
main
motor
(M1)
rotates,
the
single
feeder
pick-up
roller
starts
to
rotate
to
move
the
copy
paper
to
the
registration
roller,
which
controls
the
copy
paper
so
that
its
leading
edge
matches
the
leading edge
of
the
image
on
the
photosensitive
drum.
DC
controller
PCB
0
U
-
Copy
paper
PA1
O
Figure
3-403
Singlefeeder
paper
sensor
(PS7)
3
-
40
COPYRIGHT
©
1994
CANON
INC.
CANON
PC720I740fT50770
REV.0
AUG.1994
PRINTED
IN
JAPAN
ompRitit
AU
JAPON)