Canon IR2200, IR3300, IR2800 manual Flow of Sync signals, F03-202-01

CHAPTER 3 LASER EXPOSURE SYSTEM

2.2 Flow of Sync signals

[1]The BD signal goes ‘0’ when laser light is detected.

[2]The phase is matched with the phase of the printer, and a sync signal is generated.

[3]Based on the printer sync signal, image data is read from the image memory.

[4]Video signal

[5]The 2-pixel parallel signal is converted into a single-pixel serial signal.

[6]The laser drive signal is used to drive the laser unit to suit the video signal.

BD PCB

Laser driver

PCB

	J3129		J312
		GND
4				B11
		GND
3				B12
		[1]
2				B13
		5V
1				B14
			J307
J500		[6]

Sync signal generation [2]

Parallel/

serial

conversion

[5]

DC controller

PCB

	J316	J1015
		[3]
A18			A18

Memory

control

J316 J1015

[4]

Controller assembly

F03-202-01

E100

Indicates that the BD signal cannot be detected within a specific period of time after the laser has been turned on.

3-4 P COPYRIGHT © 2001 CANON INC. CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001