Basic HTML Version
FLIPPER CABINET SWITCH CIRCUIT
LEFT FlIPPER
OPTOeOAAO
POWER DRIVER BOARD
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Ground
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Slue.Gray L.
Left
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1
Black,Slue
U.lett
Flipper
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2 J905
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2 ~~~--~~~~--~~~~~~~--~
5
~------------------~
FUPTRONlC
a
BOARD
RIGHT FLIPPER
OPTOBOAAD
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Flipper F6
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FUPTRONIC II BOAR
J905
(U4B-7)
FUPPER OPTO BOARDS
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Black-Yellow F2
F2 Lower Right Fllpper
Fe Upper Right Flipper
F4 lower Left Flipper
Fa Upper
left
Flipper
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{U6B-7)
3
BI ue-G ray
U40·11)
2
Black-Blue
(U6D-11)
5
.• 12V
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lK11
Oedk:ated Input
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Brue-Violet
4700
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The fiipper switch circuits operate similar to the dedicated switch circuit. The circuits are active low and tied to ground
fhrougtllhe switch circuit.
When a switch closes, the row side, (dedicated Input), of the circuit actives. The
'+.
input to the LM339 drops below
+5V. therefore, its output is low. Since the row. (dedicated input). circuit is lied directly to ground through the switch,
the sWitch is consisered closed by the mlcroprocessor, When the Switch opens. the
.+.
input to the lM339 is above
-+5V. its output is high and the row, (dedicated input), is macnve.
3-13
Oray·Yellow
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