Overview/Configuration; Overview - Canon iR C1020 Series Service Manual

Chapter 7

7.1 Overview/Configuration

7.1.1 Overview

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The laser exposure system forms latent images on the photosensitive drum according to the video signals with the control by the DC controller.
The laser exposure system consists of the laser scanner unit.
The 2 laser driver PCBs, the 2 scanner motors, and the 2 polygon mirrors are installed on the laser scanner unit.
There are two (two colors of) laser diodes for one laser driver PCB. The laser beams of two colors emitted from the laser diode are reflected by one polygon mirror.
In this machine, the process speed varies according to the print mode. The rotational speed of the scanner motor and the laser light intensity are switched according
to the process speed.
Main controller PCB
DC controller PCB
Photosensitive drum Laser driver PCB
BD sensor
Focusing lens
Reflective mirror
Polygon mirror (Four-faced)
Scanner motor
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7-1