Canon iR3570 Series, Service Manual

Page: 223 / 722

Chapter 6
6-1
6.1 Construction
6.1.1 Specifications, Control Mechanism, and Functions
0006-9404
iR2270 / iR2870 / iR3570 / iR4570 / iR2230 / / / iR3530 /
Laser Light
T-6-1
Scanner Motor
T-6-2
Polygon Mirror
T-6-3
Control Mechanism
T-6-4
6.1.2 Major Components
0006-5970
iR2270 / iR2870 / iR3570 / iR4570 / iR2230 / / / iR3530 /
F-6-1
T-6-5
6.1.3 Construction of the Control System
0006-5971
iR2270 / iR2870 / iR3570 / iR4570 / iR2230 / / / iR3530 /
The laser exposure system is primarily controlled by the DC controller PCB.
iR2270/2270F/2870/2870F/2230/2230F/2830
Number of laser beams 2
Output 5mW (iR2270/2870/2230/2830)
10mW (iR3570/4570/3530)
Wave length 785 nm - 800 nm (infrared light)
Type of motor DC brushless motor
Number of revolutions 16000 rpm (approx.; single control)
(iR2270/2870/2230/2830)
27000 rpm/16000 rpm (approx.; double control)
(iR3570/4570/3530)
Type of bearing Oil
Number of facets 6 (40-mm dia.)
Synchronous control Main scanning direction
Light intensity control APC
Others Laser activation/deactivation
Laser scanner motor control
Laser shutter control
Name Description
[1] Laser unit Generates laser light
[2] Polygon mirror Scans laser light in main scanning direction.
[3] BD mirror Reflects laser light in the direction of the BD PCB.
[4] BD PCB Generates the BD signal.
[1]
[2] [4]
[3]