Various Control; Controlling The Laser Activation Timing; Turning On/Off The Laser - Canon iR C3200 Series Service Manual

8.3 Various Control

8.3.1 Controlling the Laser Activation Timing

8.3.1.1 Turning On/Off the Laser

The laser light is turned on/off in keeping with combinations of control signals (TRL0/1/2) from the DC controller
PCB.
CTR
L2
0
0
0
0
1
1
1
1
CTR CTR Status of laser A
L1 L0
0 0 OFF
0 1 OFF
(bias current applied)
1 0 APC control
1 1 OFF
(bias current applied)
0 0 ON
(for factory adjustment)
0 1 OFF
(bias current applied)
1 0 ON
(for factory adjustment)
1 1 ON
(for image formation)
T-8-6
Status of laser B
OFF
APC control
OIFF
(bias current applied)
OFF
(bias current applied)
ON
(for factory adjustment)
ON
(for factory adjustment)
OFF
(bias current applied)
ON
(for image formation)
Chapter 8
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