Basic HTML Version
SWITCH MATRIX
1
Whit&-
Brow"
J20B-l
Ula-l1
SHOOTER
LANE
1
Green-
Srown
J206-1
U20-16
White
- - -i~Ii----'
~
o-Green
11
58
w:1te-
Violet
J208-8
UI9-S
RIGHT
RIGHT
"MYSTERY"
RETURN
OUTLANE
EJECT
LANE
lEFT
LEFT RAMP
BANK
ENTER
CENTER
7
8
Green -
Gr••
n-
Violet
Gray
J206· 7
J206-9
U20-12
U20-11
Flipper
Grounded
Switches
J20S--1
LQIt Coin ChutQ
Ul?-5
(A)MY
Black..Grsen
NOT
J208-13
US ED
Lower Right
Flipper E.O.S.
J205'-2
Center Coin
Chute
UI7·?
Dl
D2
IN~ER
lEFT
LOOP
2
Whlt.
Red
J208-2
U18-9
UPPER
LOOP
2
Grsen-
Red
J206-2
U20-17_
4
Green-
Yellow
J206-4
U2D-15
S
Green-
Black
J206·5
U20·14
6
Green-
Blue
J206-6
U2D-13
3
Green-
Orange
J206-3
U20-16
SLAM
TILT
"TRAVI"
LEFT
SLINGSHOT
51
61
"COM"
RIGHT
SLINGSHOT
12
5,
62
mS-3
Right COin
Chute
U17-11
D3
W~t.
Orange
J208-3
UI6-S
START
BUTTON
NOT
USED
2-WAY
LEFT
POPPER
JET
BUMPER
13
5~
63
~~~~~e- ,~nu ••
4th
Coin Chute
U17-9
"WE ARE"
RIGHT JET
STANDUP
BUMPER
TARGET
~'~::'!.~Ui6:9
~ o lTTla l
ITe.,
function
Function
~'" crete. E.""I'"
05
D4
4
Whit.
Yenow
J208-4
U18·7
PLUMB
BOB
TILT
ALWAYS
CLOSED
''MINE
SHAFT"
14
44
71
81
Fl
5
White-
Green
J208-5
UI9-11
JET EXIT
RIGHT
EJECT
RUBBER
LEFT
LOOP
"WATCHING"
BOTTOM JET
STANDUP
BUMPER
TARGET
A{M)Y
72
AM(Y)
Black-BtuB
NOT
J208-12
USED
Lower Len
Flipper
E.O.S.
83
F3
73
74
··.·t~;:: ·.
84
··<C·S:·.
F4
(C)ONGO
NOT
USED
C(O)NGO
NOT
USED
J208-11
Upper Right
Flipper E.O.S
J205':;"
UI6-11
~orm.'
IT."
~LJI
Function
Volu mo On Down
D6
~te-
Blu.
U208-7
UI9·~
LEFT
OUTLANE
_?_5_
45
5~
65
NOT
CO(N)GO
USeD
15
LEFT
RETURN
LANE
LEFT
"PERIMETER
BANK
DEFENSE"
TOP
85
F5
75
56
76
RIGHT
CONtGlO
RAMP
ENTER
16
NOT
USED
J208-10
Upper Left
Flipper E.O.S
67
77
si.
17
27
37
47
57
~::~'~.~U~6-5
W!'.
~o'm.1
ITe.1
Gray
EUnc:liO~
Function
J208 .9
~ogln
rMi
En.o,
U19-7
D8
18
26
38
"YOU'
STANDUP
TARGET
RIGHT
EJECT
LEFT
BANK
BOTTOM
LEFT RAMP
EXIT
RIGHT
CONG{O)
RAMP
EXIT
68
78
J2XX
=
CPU BOARD
Eii1±]
=
OPTO, TYPICALLY CLOSED
SWITCH MATRIX CIRCUIT
The microprocessor is constantly strobing the column side of the switch. When paint
"An
on the column
circuit toggles low, the column side is active,
When a switch closes, the row side of the circuit activates. The n+" input to the LM339 drops below +5V,
therefore, its output is low. Corresponding row and column switches must be low at the same time for the switch to
be considered closed by the microprocessor.
When the switch opens, the "+n input to the LM339 is above +5V, its
output is high and the row is inactive.
3-2