Controlling The Deck Motor - Canon GP335 Service Manual

CHAPTER 8 PAPER DECK
F. Controlling the Deck Motor
1. Controlling the Deck Main Motor (M101)
The deck main motor is controlled by the copier's DC-CPU. Figure 8-110 shows the circuit
used to drive the deck main motor, and the circuit has the following functions:
[1] Turning on and off the deck main motor.
[2] Switching the rotation speed 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 goes '0', causing the motor to rotate at a specific speed. When the deck main motor drive
signal (DOMON) goes '0', on the other hand, the motor drive circuit turns off to stop the motor.
The copier's DC-CPU monitors the rotation of the deck main motor with reference to the PLL
lock signal (DMPLK); if, for some reason, the PLL lock signal remains '1' for 900 ms while the
DMON is '1', it will indicate "E043" on the copier's control panel.
DC-
Side deck
CPU
driver PCB
Copier
8-14
Deck main motor
J105
drive signal (DMON)
-4
Deck main motor PLL
-3 lock signal (DMPLK)
Deck main motor speed
-2
switch signal (DBIT 0)
Deck main motor speed
-1
switch signal (DBIT 1)
Figure 8-110
COPYRIGHT © 1999 CANON INC. CANON 405/335 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
J14
-3
-4
Motor drive
signal
-5
-6
Deck main motor driver PCB
Deck main motor
M101
Encoder