Canon IMAGERUNNER 7095 PRINTER, Service Manual

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Chapter 6
6-1
6.1 Construction
6.1.1 Outline of the Laser Exposure System
0010-8009
The laser exposure system consists of a laser unit (source of laser beams) and a polygon mirror. It scans
the photosensitive drum (main scanning direction) to create a latent static image. It is a 4-laser mechanism
(laser A, laser B, laserC, laserD).
T-6-1
T-6-2
T-6-3
T-6-4
Laser Light
Wave length 645 to 665 mm (visible light)
Output 20mW
Number of beams 4
Laser Scanner Motor
Type of motor DC brushless
Revolution 29527 rpm (approx.)
Polygon Mirror
Number of facets 12 (35-mm dia.)
Control Mechanism
Synchronization main scanning direction
sub scanning direction
Light intensity APC
Others laser activation/deactivation*1 (exposes "light"
areas)
laser scanner motor
laser shutter