Page 108 - Star Trek The Next Generation

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General Illumination CjrcuH
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POWER DRIVER BOARD
Drive
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G.I. Lights
J115
S.B
X
1-----<1
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Power
1__ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
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Block Diagram of Generallllumjnatjon Circuit
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1
Driver
1
1
Board
1
1- Playfleld 0-;-1
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Backbox.
1
I
Up to 18 bulbs.
1
1
1
I
1
6.3
volt secondary
5 volt secondary
Zero Cross Detection
Circuit
Power Driver Board
Microprocessor
CPU Board
When point "A" toggles low, then polnts "B" and "C" are high. This turns On the triac and the desired
General Illuminationstring lights.
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1HEREXT liEREIIJI71I1R 3-111