Basic HTML Version
Flipper Cabinet Switch Circuit Diagram
POWER DRIVER BOARD
LEFT FLIPPER OPTO SWITCH
BOARD
J905
RIGHT FLIPPER OPTO SWITCH J1
BOARD
Flipper Cabinet Switches
F2 Lower Right Flipper
F6 Upper Right Flipper
F4 Lower Left Flipper
Fa Upper Left Flipper
r------------,
, FLiPTRONIC II
, BOARD
FLIPPER OPTO
SWITCH BOARDS
...
------------------------,
, FLiPTRONIC II
I
, BOARD
,
:i=LipPEROPTO swrrCH
-BOARD;
Cabinet Switch
Switch A B
Open H
Closed L
'74HCT244
Dedicated Input
POWER DRIVER BOARD '
H Off
L On
The flipper switch circuits operate similar to the dedicated switch circuit. The circuits are active low and tied to ground
through the switch.
When a switch closes the row side (dedicated input) of the circuit activates. The "+" input to the LM339 drops below +5V
therefore its output is low. Since the row (dedicated input) circuit is tied directly to ground through the switch, the switch
is considered closed by the microprocessor. When the switch opens, the
"+"
input to the LM339 is above +5V, its output
____-
is high and the row (dedicated input) is inactive.
Twilight Zone 3-27