Canon Paper Deck-V1, Service Manual

Page: 26 / 90

Chapter 2
2-6
2.2.3 Controlling the Deck Main Motor (M101)
0009-2049
1. Controlling the Deck Main Motor (M101)
The deck main motor is controlled by the host machine's DC controller. The following diagram shows the circuit
used to drive the deck main motor, and the circuit has the following functions:
[1] turns on/off the deck main motor
[2] changes the speed of rotation of the deck main motor
a. Turning On/Off the Motor
The deck main motor is turned on or off by controlling the output of the pulse signals (A, A*, B, B*) from the host
machine.
b. Changing the Speed of Rotation of the Motor
The deck is designed to automatically change the speed of pickup so as to support future host machines. The pickup
speed is changed in response to external clock signals (M-CLK) that are sent by the host machine's DC controller to
the side deck drive PCB in keeping with the speed of motor rotation.
F-2-6
2.2.4
Controlling the Deck Lifter Motor (M102)
0009-2050
2. Controlling the Deck Lifter Motor (M102)
The deck lifter motor control circuit is found as part of the side deck driver PCB. The following is a block diagram
of the circuit:
The combination circuit shown in the diagram consists of various logic circuits, and the deck lifter motor is rotated
in normal or reverse direction using combinations of the deck lifter drive signal (DECK_LIFT_ON) and the deck
lifer DOWN/UP signal (DECK_DW/UP) from the host machine's DC controller and the output signals of various
sensors.
If, for some reason, the deck lifter position sensor (PS104) does not detect the lifter within a specific period of time
in the presence of the deck lifter DOWN/UP signal, the machine will indicate an alarm code ('05'; may be checked
M101
+24V
A
A
*
B *
B
Deck main motor
Side deck driver PCB
DC controller
PCB
Motor rotation
control circuit