Canon IR2200, IR3300, IR2800 manual Part 2Chapter 41.1 Outline of Laser Exposure System, T03-101-01

CHAPTER 3 LASER EXPOSURE SYSTEM

1 Outline of Operations

1.1 Outline

Part 2>Chapter 4>1.1 “Outline of Laser Exposure System”

The reader controller PCB serves to read image signals from the CCD and send image signals to the main controller assembly. The video signals from the main controller assem- bly are converted by the DC controller PCB into laser drive signals, and are turned into laser intensity signals to suit signal levels by the laser driver PCB.

The laser intensity signals are used to cause the laser unit to generate a laser beam, which is directed to the photosensitive drum for the formation of latent static images.

Item	Description
Laser intensity control	Laser power auto control (APC control)
Laser scanning	By semiconductor laser
Synchronization control	Main scanning direction: control by BD signal
	Sub scanning direction: control by image leading edge signal
Laser scanner motor control	Constant speed rotation control
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COPYRIGHT © 2001 CANON INC. CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001 3-1 P