Canon Paper Deck Unit-B1, Service Manual

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Chapter 2
2-2
F-2-2
2.1.3 Controlling the Deck Main Motor (M1D)
0023-7222
The following diagram shows the circuit used to drive the deck main motor:
The serial signal from the host machine is used to control the following signals to turn on/off the deck main motor and switch the speed of its rotation: FEE_M_A,
FEED_M_A*, FEED_M_B, FEED_M_B*.
F-2-3
2.1.4 Controlling the Deck Lifter Motor (M2D)
0023-7223
The deck lifter motor is controlled by the deck driver circuit.
The deck lifter motor is rotated clockwise/counterclockwise using the following signals:
- output signals from various sensors
- deck lifter drive command/deck lifter up command (signals from the host machine's DC controller)
1. Moving Up the Lifter (a through e must be satisfied)
a) the deck is connected to the host machine.
deck set signal (DECK_MOUNT_SENS)="1"
b) the compartment is closed.
deck open detection signal (DECK_OPEN_SENS)="1"
deck open detecting switch (DECK_OPEN_SW)="ON"
c) the deck lifter upper limit detection signal (LIFT_M_UPLMT)="0"
and, in addition, deck lifter position detention signal (PAP_TOP_SENS)="0"
d) deck lifter motor down signal (LIFT_M_DOWN)="0"
e) deck lifter up signal (LIFT_M_UP*)="0"
2. Moving Down the Lifter (a through d must be satisfied)
a) the compartment is open.
deck open detection signal (DECK_OPEN_SENS)="0"
b) deck lifter lower limit signal (LIFT_LOW_LMT)="0"
and, in addition, deck lifter position detection signal (PAP_TOP_SENS)="0"
c) deck lifter motor down signal (LIFT_M_DOWN)="1"
d) deck lifter up signal (LIFT_M_UP*)="1"
<If the lifter was not detected within a specific period of time>
If, for some reason, the deck lifter position sensor (PS4D) does not detect the lifter in the presence of the deck lifter up signal, the machine issues an alarm code.
INTR LSTR STBY
Deck main motor
(M1)
Deck pickup clutch
(CL2)
Deck pickup roller
releasing solenoid
(SL1)
Deck pickup paper sensor
(PS6)
Deck feed sensor
(PS1)
SCAN
PRINT
Start key
ON
M1D
+24V +5V
FEED_M_A
FEED_M_A*
FEED_M_B*
FEED_M_B
Deck main motor
Deck drive PCB
DC controller PCB
Motor rotation
control signal
Motor drive current
switch circuit