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CHAPTER 5 LASER EXPOSURE SYSTEM
5-2
COPYRIGHT
©
1999 CANON INC. CANON imageRUNNER 600 REV.1 JAN. 2000 PRINTED IN U.S.A.
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).
Figure 5-101 External View
Table 5-102 Components
Photosensitive drum
BD PCB
BD mirror
8-facet mirror
Laser scanner motor
Imaging lens
Laser unit
Laser mirror
Laser driver PCB
80 µm
A
B
18 pixels
(760µm)
Laser A
Laser A
Laser B
Laser B
Component
Laser semiconductor
Laser scanner motor
Polygon mirror
RD mirror/BD detection PCB
Laser driver PCB
Laser scanner motor driver PCB
Description
Visible laser light (675 nm), 2 beams
DC motor, 2-speed control
8-faceted
Laser activation control
Laser scanner motor rotation control
Notation
M4