Canon iR2200 Service Manual page 174

CHAPTER 3 LASER EXPOSURE SYSTEM
J307
1
2
3
4
J310
1
2
3
4
5
J312 INT_TOPO_PD [4]
A14
J304 Y_REG_PD [8]
A8
DC controller
PCB
The laser power of the laser unit is adjusted at the factory, and it must not
be adjusted in the field.
REF.
ADJUST>LASER>PVE-OFST
Use it to adjust the position of laser illumination.
ADJUST>LASER>LA-OFF
Use it to adjust the timing of laser trailing edge de-activation for non-de-
fault size papers.
3-6 P
COPYRIGHT © 2001 CANON INC.
J500
GND
4
DATA(+) [1]
3 3
DATA(-) [1]
2
2
GND
1
1
J501
GND
5
+5V
4
DAOUT [7]
3
S/H [2]
2
LDE* [3]
1
Laser driver PCB
F03-301-01
Laser
drive
circuit
2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001
Laser assembly
[6]
Laser
Intensity
monitor [5]
Laser unit
Image leading edge
sensor
(PS12)
Horizontal registration
paper sensor
(PS11)