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GENERAL ILLUMINATION CIRCUIT
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Drive
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J102
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POWER DRIVER BOARD
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S.B.
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Power
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G.I. LIGHTS
Figure #1
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GJ. LIGHTS
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POWER DRIVER BOARD
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Figure #2
There are five general illumination strings; three like figure #1 and two like figure #2. When point "A"
toggles low. points, "8" and "C" are high. This turns on the triac and the desired general illumination
string of lights.
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BLOCK DIAGRAM OF GENERAL ILLUMINATION CIRCUIT
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pow~r Driver Boord
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P;;e7"
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Board
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IPiayfield -;; Backbo~
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G.I.,
Light s.
Up to
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18 bulbs per string.
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Driver s
Triac
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6.3 volt secondary
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LS374
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Power Driver Board
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CPU Board
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Zero Cross Oetection
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~ 5 volt secondary
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Circu it
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Micropr ocessor
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3-10