Various Controls; Controlling The Laser Activation Timing - Canon imageRUNNER 1750 Series Service Manual

2
Technical Explanation > Laser Exposure System > Various Controls > Controlling the Laser Activation Timing

Various Controls

■ Controlling the Laser Activation Timing

● Laser ON/OFF Control
Laser ON/OFF control is dependent on the combination of the laser control signal (A/B laser:
CNT0-0/0-1/0-2, C/D laser: CNT1-0/1-1/1-2) from the image PCB.
<A laser/B laser>
Laser control signal
CNT0-0 CNT0-1 CNT0-2 A Laser
1 1 1 Image data output
0 1 1 Forcible output
1 0 1 OFF
0 0 1 Forcible output
1 1 0 Forcible output OFF
0 1 0 ON (For APC control)
1 0 0 OFF
0 0 0 Discharge: APC reset
(Fixed when laser is not used)
<C laser/D laser>
Laser control signal
CNT1-0 CNT1-1 CNT1-2 C Laser
1 1 1 Image data output
0 1 1 Forcible output
1 0 1 OFF
0 0 1 Forcible output
1 1 0 Forcible output OFF
0 1 0 ON (For APC control)
1 0 0 OFF
0 0 0 Discharge: APC reset
(Fixed when laser is not used)
2 Technical Explanation > Laser Exposure System > Various Controls > Controlling the Laser Activation Timing
Laser status
B Laser
Image data output
OFF
Forcible output
Forcible output
Forcible output OFF
OFF
ON (For APC control)
Discharge: APC reset
(Fixed when laser is not used)
T-2-23
Laser status
D Laser
Image data output
OFF
Forcible output
Forcible output
Forcible output OFF
OFF
ON (For APC control)
Discharge: APC reset
(Fixed when laser is not used)
T-2-24
J8142
Main Controller PCB
2-37
F-2-59
2-37