Canon iR5000i Service Manual page 500

CHAPTER 8 PAPER DECK
1.6 Controlling the Deck
1.6.1 Controlling the Deck Main Motor (M101)
The deck main motor is a stepping motor controlled by the DC controller of the host ma-
chine. The following figure shows the circuit used to drive the deck main motor, and has the
following functions:
[1] Turing on and off the deck main motor.
[2] Changing the speed of rotation of the deck main motor
a. Turning On and Off the Motor
The deck main motor is turned on or off by controlling the output of the pulse signals
from the host machine. (DMMA, DMMA*, DMMB, DMMB*).
b. Changing the Speed of Rotation of the Motor
The deck is designed to automatically change the speed at which paper is moved in con-
sideration of future models of its host machine. As such, its speed is changed by the motor
clock signals (M-CLK) arriving at the deck driver PCB from the DC controller of its host
machine.
DC controller
PCB
8-14 P
Deck driver PCB
+24V
Motor switching
current switching
circuit
Motor rotation
control circuit
F08-106-01
COPYRIGHT © 2001 CANON INC.
+5V
*
DPUMA
DPUMA
DPUMB
*
DPUMB
2000 2000 2000 2000 CANON iR5000i/iR6000i REV.0 JUNE 2001
M101
Deck main motor