Canon PD-82K Service Manual page 22

CHAPTER 2
B. Paper pick-up
1. Pick-up operation
This paper deck conducts paper pick-up operation by lifting the paper to the paper pick-up
position with the lifter and lowering the rotating cassette pick-up roller to the paper level.
Paper pick-up operation is conducted only when the paper deck driver receives the pick-up
command from the option controller. The pick-up roller is lowered to the paper level by the
rotational force of the paper deck drive motor (SPM1). At the same time, the pick-up roller is
rotated by the rotational force of the pick-up motor.
Paper pick-up operation is conducted as follows.
On receiving the pick-up command from the option controller, the paper deck driver runs
the paper deck drive motor (SPM1) and the pick-up motor (SPM3). When the cassette pick-up
solenoid (SL1) is turned ON, the paper deck drive motor rotates the cassette pick-up cam via
the gear to drive the shaft drive arm.
At the same time, the rotational force of the pick-up motor is transmitted to the cassette
pick-up roller via the feed roller gear. As a result, the rotating cassette pick-up roller goes
down to the paper level, picks up a sheet of paper, goes up to the paper pick-up standby
position, and stops rotation.
When the pick-up motor rotates clockwise, the paper is picked up from the upper cassette
by rotating the cassette pick-up roller, feed roller 1 and separation roller of the upper cassette.
When the pick-up motor rotates counterclockwise, the paper is picked up from the lower
cassette by driving the cassette pick-up roller, feed roller 1 and separation roller of the lower
cassette.
Pick-up roller
Feed roller 1
Separation roller
2 - 8
Paper lifting plate
Print paper
Pick-up roller shaft
Pick-up motor drive
Feed roller gear
Pick-up roller shaft fixing arm
Figure 2-2-3
Cassette pick-up cam
Shaft drive arm
Lift-up release arm
Lift-up cam
Paper deck
motor drive
Gear
Cassettte pick-up
solenoid