JED T440 simple system block diagram #1:
projector/no-audio control configuration
Power amp.
+ speakers
Powered
speakers
VGA 1
(VGA 2)
Comp./S-Video
(Audio can bypass projector
and use just one channel,
with manual control. Then can
use a freeze/mute keyboard.)
Projector RS232/1 (or IR)
video + audio control
12 volt
plug pack
JED T440
12v
Blue: RS232
Black: VGA/Video
Red: Audio
Green: PIR/Screen
Screen
Up/Down
PIR
detector
OR
