CHAPTER 3 EXPOSURE SYSTEM
COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-9
2.
Driving the Scanner Motor (M2) and the Mirror Motor (M3)
Figure 3-402 is a block diagram showing the drive circuit used for the scanner motor (M2) and
the mirror motor (M3). These motors are 4-phase stepping motors.
The pulse signals used to drive the motors (MIRRA, MIRRA*, MIRRB, MIRRB*) are gener-
ated by Q300 of the DC controller PCB; on the other hand, the motor select signal (MIRRCOM,
SCNCOM) is generated by Q300 and Q303.
The motor selected by the motor select signal is controlled for direction and speed by the pulse
signals from Q300.
Figure 3-402
Q323
Q320
5V
24V
Q325
J303
Q325
Q325
Q325
MIRRA
MIRRCOM
MIRRA
Mirror
motor
COM
MIRRA*
MIRRB
MIRRB*
MIRRB*
DC controller PCB
Q300
(CPU)
5
Q319
Q365
24V
SCNCOM
Q321
3
M3
Q326
Q371
TD
A
MIRRA*
4
Q327
MIRRB
2
Q328
5V
5V
5V
5V
1
Q303
Q324
Scanner motor
driver
Q329
Q370
TDB
5V
Q330
J302
PMA
Scanner
motor
COM
COM
PMA*
PMB
PMB*
M2
5
4
6
2
1
3
Содержание NP6317
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