Various Controls; Controlling The Laser Activation Timing - Canon imageRUNNER 2270 Service Manual

6.3 Various Controls

6.3.1 Controlling the Laser Activation Timing

6.3.1.1 Turning On and off the Laser Light
The laser light is turned on and off according to the combination of laser control signals
(CNT0/1/2) from the DC controller PCB.
Laser control signal
CNT2 CNT1
0 1
0 1
0 0
0 1
1 1
0 1
0 0
0 1
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Laser status
CNT0 Laser A
0 ON (for APC control)
1 OFF
1 OFF
1 OFF
1 Video signal input enabled
1 OFF
1 OFF
1 OFF
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Laser B
OFF
OFF
ON (for APC control)
OFF
Video signal input enabled
OFF
ON (for APC control)
OFF
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