Laser Driver Pcb; Outline - Canon GP605 Service Manual

III . LASER DRIVER PCB
A.

Outline

Figure 5-301 shows items of control related to the laser driver circuit:
[1] Turning on and off the laser.
[2] Controlling the intensity of the laser.
Clock pulses for the laser B
Image signals for the laser B
J1106
1
VIDEO-B
16
17
CLK-B
20
21
CLK-A
24
25
VIDEO-A
40
J1107
Light intensity
10
control signal
18
1 Activation control
signal
9
19
30
COPYRIGHT © 1999 CANON INC.
Relay PCB
J1714
1 2 3 4 5 6
J1301
1
16
17
20
21
24
25
40
J1353
J1354
10
EEPROM
18
1
9
19
30

Laser driver PCB 2

[2]
VR for image area activation adjustment
Figure 5-301 Function Construction
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5 LASER EXPOSURE SYSTEM
[1]
The laser diode is turned on
to suit the image signal.

Laser driver PCB 1

Laser B
Intensity monitor
Laser A
5-7