F. Controlling the Deck Motor
1. Controlling the Deck Main Motor (M101)
The deck main motor is controlled by the copier’s DC controller; Figure 8-110 shows
the circuit used to drive the deck main motor, and the circuit has the following functions:
q
Turning on and off the deck main motor.
w
Switching the speed of rotation of the deck main motor.
a. Turning On and Off the Motor
When the deck main motor drive signal (DMON) from the copier goes ‘1’, the motor
drive circuit turns on to rotate the motor at a specific speed. When the deck main motor
drive signal (DMON) goes ‘0’, on the other hand, the motor drive circuit turns off to stop
the motor.
The copier’s DC controller monitors the speed of rotation of the motor in reference
to the deck main motor clock pulse signal (DMFG); if the pulse signal stops for a specific
period (1.4 sec during initial rotation; 2.8 sec during normal copying), the DC controller
will indicate ‘E043’ on the copier’s controller.
Figure 8-110
Deck main motor driver PCB
DC
controller
PCB
Side
deck
driver
PCB
Motor drive
circuit
Deck main
motor
M101
Encoder
-9
-7
J2
-5
J7
-5
-1
-3
-9
Deck main motor drive
command (DOMON)
Deck main motor clock pulse
signal (DMFG)
J2001
A-11
B-9
SW1
(*)
*Deck main motor high-speed signal (DMHS)
J10
-7
COPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 8 PAPER DECK-A1
8-13
