Page 118 - Road Show

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GENERAL ILLUMINATION CIRCUIT
ipowERDRNERBOARo----------l
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0 rive
vee
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J12D
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G.I. LIGHTS
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Power
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c
J115
When
point
"Aft toggles low,
points,
"8" and "C" are high. This turns on the triac and the desired general
illumination string of lights.
BLOCK DIAGRAM OF GENERAL ILLUMINATION CIRCUIT
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Power Driver Boord
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P;;;e-;:-
D~;-
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Board
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IPlo0ieid ;;;:-
&;ckbo-:l
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C.I.
l.iq-its.
Up to
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18 bulbs per string.
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JJ2l
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:
® :
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ill
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;>
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;>
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6.3 volt secondary
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Triac
Drivers
r--
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+ _
~----------------------------------------~
1-------,
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Power Driver Board
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CPU Board
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>-
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Zero Cross Detection I--+I----,---il
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5
It
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Circuit
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Microprocessor
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vo secon cry
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3-10
LS374
Latch