Canon 1000 Service Manual page 192

3. OPERATION AND TIMING
4. Paper Deck Lifter Operation
a. Outline
The lifter of the paper deck receives drive from the paper deck motor (M8001) transmitted through gears
and chains and moves up and down as the motor switches its direction of rotation.
The paper deck motor is turned on/off and its direction of rotation is switched based on combinations of
signals from various sensors (Figure 3-618) and switches (PS8002, SW8001, SW8002, SW8003) and
control signals from the CPU on the DC controller PCB.
The lifter moves and stops when the lifter position sensor (PS8002) detects the top surface of the paper
stacked on the lifter.
When paper runs out and the sensor arm blocks the paper absent sensor (PS8001), the message 'ADD
PAPER' will be indicated on the control panel.
At this time, the lifter will move up until it pushes the lifter upper switch (SW8001) and then stop.
On the other hand, the lifter will move down until its cam pushes the lifter lower limit switch (SW8002)
and then stop.
J2223A
-8
-7
DC controller
PCB
-10
-9
-4,-5
3-148
COPYRIGHT © 2001 CANON INC.
Lifter position signal (LTP)
Paper absent signal (STPE)
Lifter upper limit signal
Paper deck lifter upper
switch (SW8001)
Cam
Paper deck cover open
signal (STDO)
Paper deck lifter lower
limit switch (SW8002)
Lifter lower limit signal (LFLM)
Paper deck motor drive signal
Figure 3-618
CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Paper deck lifter position sensor (PS8002)
Paper deck paper
absent sensor (PS8001)
Sensor arm
Paper
Hole Lifter
Paper deck cover
open/closed detection
switch (SW8003)
M8001 Paper deck motor
Paper deck
Paper deck
cover