Canon ImageRunner 600 Service Manual page 144

CHAPTER 5 LASER EXPOSURE SYSTEM
Figure 5-101 shows the major components of the laser exposure system.
To accommodate the increase in copying speed, laser scanning is performed by two beams
(lasers A and B).
8-facet mirror
Laser scanner motor
BD PCB
Component
Laser semiconductor
Laser scanner motor
Polygon mirror
RD mirror/BD detection PCB
Laser driver PCB
Laser scanner motor driver PCB
5-2
COPYRIGHT © 1999 CANON INC.
80 µm
Laser B
BD mirror
Laser B
Figure 5-101 External View
Notation
M4
Table 5-102 Components
Laser A
Laser driver PCB
Laser unit
Imaging lens
Photosensitive drum
Laser A
18 pixels
(760µm)
Description
Visible laser light (675 nm), 2 beams
DC motor, 2-speed control
8-faceted
Laser activation control
Laser scanner motor rotation control
CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
Laser mirror