Outline Of Operations; Outline - Canon iR2200 Service Manual

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
Laser intensity control
Laser scanning
Synchronization control
Laser scanner motor control
COPYRIGHT © 2001 CANON INC.
Laser power auto control (APC control)
By semiconductor laser
Main scanning direction: control by BD signal
Sub scanning direction: control by image leading edge signal
Constant speed rotation control
T03-101-01
2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
CHAPTER 3 LASER EXPOSURE SYSTEM
Description
3-1 P