Scanning Motor Control Circuit - Canon NP6330 Service Manual

2. Scanning Motor Control Circuit

The scanning motor (M2) is a 4-phase control stepping motor.
Figure 3-302 is a block diagram of the circuit used to control the scanning motor, and
the circuit has the following functions:
Turning on and off the motor.
Controlling the rotation of the motor.
Controlling the speed of the motor.
Stabilizing the motor.
DC
controller
PCB
COPYRIGHT © 1997 CANON INC.
J106 J202
-5A
SCM1
-3
-6A -2
SCM2
-3A SCCLK -5
-4A SCMD -4
*
-1A -7
SCRET
-7A SCVREF -1
-2A SCRON -6
Figure 3-302
CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)
±5V ±24VB
Drive circuit
Motor driver 1 PCB
CHAPTER 3 EXPOSURE SYSTEM
SCA
SCA
*
SCB
M2
SCB
*
Scanning motor
3-7