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1V.
PAPER TRANSPORT SYSTEM
A. PAPER PICK-UP UNIT AND
FEEDER
|
1. Outline
When the pick-up roller clutch solenoid
(SL1) engages, main motor M1
turns the
roller, feeding a sheet of copy paper to the
registration rollers. The number of rotations
of the pick-up roller varies with the length
of the copy paper. (See Table 3-4)
The copy paper is fed by the registration
rollers so that its leading edge is in line with
. the leading edge of the toner image on the
photosensitive drum. It then passes through
the transfer, separation,
feed, fixing and
delivery stages to the copy tray.
The copy paper is sensed by. phototran-
sistors (Q2 and Q5). If it does not reach or
pass the sensors within the specified pe-
riod, the DC controller PCB judges that a
jam has occurred
and causes the PAPER
JAM indicator on the control panel to flash.
Delivery unit paper sensor (PDP2)
Phototransistor
(Q1) senses
whether
there is paper in the cassette. If there is not,
the CASSETTE
PAPER OUT signa! (CPEP)
becomes "0", causing the PAPER OUT indi-
cator on the control panel to go ON.
Control ring
Figure 3-29
DC controller
MAIN MOTOR DRIVE}
command (MMD)
[J rotter
9g
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w A | w2 2
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a~
—
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EB
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|
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ae
GC ei D0uWS
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=
es
: a
CASSETTE
PAPER
OUT
signal
(CP
Registration
2
roller
Y
Registration
[J
Cassette size sensor
Figure 3-30
COPYRIGHT © 1088 CANON IRC.
CARON NP-1215 REV.O MAR. 1988 PAINTED IN JAPAN (IMPRIME AU JAPOH)
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