TEST POINTS
Strobe
16ms
#
STROBE 1
+100VDC
_n_n_
®
l_ 4J_§_·5
T
_n_n_
10
®
8
8
T
r
IC7
NORMAL 0.33 VDC
BLANKING 0 V
INCORRECT VOLTAGE
INDICATES FAULTY
IC9, IC10, IC11
NORMAL 4.8 VDC
BLANKING 5 VDC
INCORRECT VOLTAGE
INDICATES FAULTY
CPU BOARD IC6
IC)
11
NORMAL 24.0 VDC
BLANKING 0V
INCORRECT VOLTAGE
INDICATES FAULTY
IC7, IC8, IC12, IC13
4J8·13 )
5J5·13
I
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
□
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
A
B
c•
IC11·9
IC11-5
IC11 ·3
IC10-1
IC10-3
IC10-5
IC10-13
IC10-11
IC11·11
IC10-9
IC9·13
IC9·11
IC9·9
IC9·1
IC9·3
IC9·5
IC11·8
IC11·6
IC11·4
IC10-2
IC10-4
IC10-6
IC10-12
IC10-10
IC11-10
IC10-8
IC9·12
IC9·10
IC9·8
IC9·2
IC9·4
IC9·6
IC7· 11 (IC13·18)
IC13·16 (IC8·16)
IC13·17 (ICB-17)
IC 11 · 15 (IC8· 15)
IC11·14 (ICB-14)
IC13· 13 (IC8· 13)
IC13·12 (IC8· 12)
IC1 3- 11 (IC8·11)
IC8·18 (IC12·16)
IC12· 17 (IC7· 17)
IG12·18 (IC7· 18)
IC12·15 (IC7· 16)
IC12·14 (IC7·15)
IC12·13 (IC7·14)
IC12· 12 (IC7· 13)
IC12· 11 (IC7·12)
• second test point for Credit or Player 3 and Player 4 .
+9o voe
~
ON
~
6
+125VDCON
0VOFF
ON
d
+125VDCON
WI
._j,. @ 8
OVOFF
COMMA 1 + 2 ·4J5·18~--<-.....----<~-...:....:::,,---..._ 10
OFF DISPLAY EVEN
9
1----------,
ON DISPLAY ODD
,----------t
~
®
ABCDEFG
J[
7/ 31
-60VDC
®
®
@
INCORRECT VOLTAGE
INDICATES FAULTY
IC3, IC4
INCORRECT VOLTAGE
INDICATES FAULTY
IC1, IC2
INCORRECT VOLTAGE
INDICATES FAULTY
IC1 , IC2·R1 ·R14, GD1
4J8·2
5J5·2
R27
1 MEG (
'""G:'"' l
1 - - - - - - - - : - · --"ta
@
; -,owoc t-\.c~~-v..------1 _____ _.
C
IC I
d
e
DISPLAY
1
BLANKING
t
+5.0VDC
+0.2VDC
+0.2VDC
+0.2VDC
+s.2 voe
-1,
+0.2VDC
+0.2VDC
+0.2VDC
+5.0VDC
INCORRECT VOLTAGE
INDICATES FAUL TY
CPU BOARD IC18
-~
1'
®
f
g
DISPLAY
8
R16
-41 VDCON
-21 VDC OFF
DISPLAY 1
®
®
@
®
®
@
a
0V
+5.0VDC
+5.0VDC
+ov
+ov
+ov
+ov
-21 .0VDC
-98.0VDC
-98.0VDC
-21 .0VDC
-21 .0VDC
-21.0VDC
-21.0VDC
-20.0VDC
-52.0VDC
-52.0VDC
-20.0VDC
-20.0VDC
-20.0VDC
-20.0VDC
ALL
+5.0 VDC
ALL
- 97.0 VDC
ALL
-52.0 VDC
C
d
e
f
g
l l l
4J8·15
5J8· 15
-100 VDC
R26
1 MEG
1'
-35 VDC ON
-20VDC OFF
+1oov
DISPLAY !l
SEGMENTS
b
@
• •
•
• •
BCD
FUNCTION
TEST
POINT D
SEGMENT
FUNCTION
A1
B1
C1
D1
IC3·5
IC3·3
IC3·2
IC3·4
a
b
1-2 comma
IC14·8
IC4·5
IC4·3
IC4·2
IC4·4
A2
B2
C2
D2
3·4 comma
IC14·12
C
d
e
f
g
-
a'
b'
c'
d'
e'
f
g'
-
TEST POINTS
E
F
G
IC3·9
IC3·10
IC3·11
IC3·12
IC3·13
IC3·15
IC3·14
IC1 ·12
IC1-13
IC1-14
IC1-15
IC1 · 16
IC1 · 18
IC1·17
R1
R2
R3
R4
RS
R7
R6
IC14· 10
IC4·9
IC4·10
IC4·11
IC4·12
IC4·13
IC4·15
IC4·14
IC14·11
IC1-11
IC2· 11
IC2·12
IC 2· 13
IC2· 15
IC 2· 16
IC 2·1 8
IC2·17
IC2· 14
R16 bottom
RB top
R9top
R10 top
R11 top
R12 top
R13 top
R14top
R15 top
bottom
bottom
bottom
bottom
bottom
bottom
bottom
• •
• •
• •
•
•
(/)
~
l>
"'U
JJ
r
.....
0)
.....
---.I