Canon IR2800 Generating Sync Signals, Sequence of Operations laser exposure system, F03-102-01

CHAPTER 3 LASER EXPOSURE SYSTEM

1.2 Sequence of Operations (laser exposure system)

Laser scanner motor

Image leading edge signal

Main power switch ON/sleep mode OFF

Original set/ADF opened/key operated

Start key ON

180˚C

AINTR		STBY	INTR	PRINT	LSTR	STBY
	8 sec					*

Laser

BD signal

*: If silent mode (in user mode) is selected, the motor stops after a specific period of time.

F03-102-01

2 Generating Sync Signals

2.1 Outline

Part 2>Chapter 4>2 “Generating the BD Signal”

The BD signal used to synchronize the video signals in laser scanning direction is gener- ated by the BD PCB with reference to the laser beam reflected by the BD mirror mounted in the path of the laser beam.

The edge of paper re-picked in double-sided mode is detected by the horizontal registra- tion sensor to measure the displacement to the rear/front. Based on the measurement, the timing of laser activation is changed with reference to the BD signal so that the image will be placed at a specific position on the paper without fail.

COPYRIGHT © 2001 CANON INC. CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001 3-3 P