Page 6 - WilliamsMidway WPC Theory Of Ops & Schematics 16-9289

SEO Version

REV DESCRIPTION Of CHANCE ECN NO.
OAT£
;(_
K '
i
e e.,
~(O3?'1
J ~:
<J';."
t;i
. ' !: ' :1 ( · ,. . • ) ' \.
.3-
,q- Gj I
3
REVISED
u- .;_.~
j
2
s·-/'-,
~ ~EV\ SED
~. ::."1'
9j
}
,
VCC
J802
Ul
2
1
A12
Al0
1 A
YO
~
All
All
2
4 3
.Al0
A I2
3
8
Yl
ptt-
8
.5
A9
V
C
Y2
~
8
7
A8
Y3
~
10
Q
A7
8
Y4
12 11
A8
4. Gl Y5
PORT
~QBI
14 13
A~
I
.5
C2A Y6 7
cONTRoL
<PORT
I
16 15
G28 Y7
18 17
...__
"
~
I/O
74HCT138
20 19
22 21
r --
I~C E
24 23
~
I:)
28 25
HOR 2X13
VCC
CLOCK SICNALS ARE RELATIVE TO ~C SYSTEM CLOCK
2
U7A
A1 Yl 18
:"'TEl
4
18
6 A2 Y2 14
0
('Q"' "t
A8
8 A3 Y3 12
A4 Y4
U1B
1
G
11 Al Yl
+
13
E
74HCT240
15 A2 Y2
.5
E
11 A3 Y3
~
A4 Y4
19.
G
14HCT240
A9
1
U3
A8
2
V
_A1
3
1'114 A5
4_
>
100
V
A4
8
.5
A3
6
A2
11
12
74LS30 VCC
U2
.5
G2B Y7 7 OISPAGERO
SPAGER[
4
9
SPAGE'IIIt'R
8 G2A Y6
w,-
O. SPAGE'IIIt'R
G1
Y.5 11 lO~AGE'IIIt'R
Y4
OM"AGE'NR
A1
Y3 1_2_ f :RQRi
F RQRD
3 C
Y2 13
ROW :R
111)"'_ .1'1
AO
2
B
Y1
~
HIG.t:lI"AG.EWR
RL'I'I_
1
15
A
YO
H GHPAGEWR
74HCT138
~C
B/W
<~C
R/wl
J801
If
fie
rIRO
3. 33
r- -
-
32 31
30 29
r--
BLANK
BLANK
28 27
.M .
.BLANK
26 25
2. 23
A 1_"
22 21
A2 "
20 19
A3 _"
18 11
A.
~O
-,
Aro
1 '1
18 15
1
A[O
.12J
14 13
~2
12 11
t3
10 9
o.
8
7
~.5
6 5
6
4
3
7
2
1
HOI'!
17X2
oro
7]
O.. 7J
>
PCB NO. 5760-12710-00
ASSY NO. A-14039
Dot Matrix Controller Board (sheet 1 of 4)
Page 5·7