Laser Scanner Motor; Controlling The Laser Scanner Motor - Canon CP660 Service Manual

III. LASER SCANNER MOTOR
A.

Controlling the Laser Scanner Motor

D-CPU
PRNT*
20
(IC201)
J211-2
The machine's laser scanner motor is a 3-phase, 8-pole DC brushless motor.
The laser scanner motor driver circuit is in the GA (IC204), and is equipped with two
control circuits, controlling speed and discrepancies in phase to ultimately control the
rotation of the laser scanner motor.
COPYRIGHT © 1999 CANON INC.
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DC controller PCB
SCNON
54
VDWN*
GA 29
VUP*
(IC204)
27 28
PLDWN*
30
PLUP*
33 31
J211-5
SCMFG
BD*
Figure 3-301
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 3 LASER EXPOSURE SYSTEM
Speed
control
voltage
generation
circuit
Lock
detection
circuit
C286
J901-3
J2-2
Motor
drive
voltage
generation
circuit
J211-7
SCND
J901-1
7
M
5
Scanner motor
BD
2
BD PC
3-9