Page 35 - WilliamsMidway WPC 91 Schematics 16-9289

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Switch Circuit
For an the switches, the number on the left indicates the column, the number on the right indicates
the row. Example-Switch 23 means 2nd column, 3rd row.
The switch circuit operates on +12VDC .Most of the switches are tied to a column and row circuit.
Some of the switches are "dedicated", which means the circuit is tied directly to ground through a
switch.
The 'playfield and cabinet switches make up the matrix, while the coin door makes up the dedicated
switches.
Switch Matrix
Whit.
-......I•.•.
+I-".••
-Gr.en
~
1
2
3
4
5
6
7
8
Grounded
GrH.
G•.•• n-
Gr•• n-
Gr.en·
ar•••
G•.•••
a•.••
n-
Green-
Swnche.
Brown
Red
Oraflll_"
Yellow Ba.ck
Blue
Violet
Gr.y
Or.n~Brown
Left CoIn
1
White-
Rl@ht
Slam
Cbnte
Brown
FliptMU'
'JUt
n,
-t
~'
.,
••
.•.
.lI1_
. ll
.1.
Or.nge.RMI
C~rColn
2 White-
Left
From
Chute
Red
FH","",
Door
D2
1;
22
u
42
52
112
12
112
Ou,np.Ba.ck
RlMhtCoiD
3 Whl:le-
Start
'Iklwt
Chute
Or••••
8IlUon
l)ho"",_r
0"
1
23
sa
43
53
n
73
63
Or ••• ~Y"1ow
Test
WhIttI·
PI.umb
4thCein
4
V8Ilow
llh
P< :.eitiol>.
Chute
TIll
AlW8)'B
D.
~~
C~
,24
3.
••
"
u
U M
Or.nge-Gr •• n
- I
Tool
White-
"'"""""'~
5
=:I~
G_
t:
25
: l!I
n
55
ft5
15
as
Or ••• ~Blue
-
I
Too'
F\notion
"'-lIon
S While-
~"I
no-
Blu.
[l$
1e
2$
Je
••
H
Ie
7$
N
Or.n~VI<)"1
-
I~
White--
"'""""'"
7
VollllD"
I
Violet
Up
Up
0'1
t
21
31
.7
51
.7
77
e7
~rq
T•.•
t
White-
A.n:don . ,Fundlon
8
B<wIn ,Enter
n
•.
Gr.y
T<oet
t
,.
""
u
.~
".
T~
-
3-5