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TEST/DIAGNOSTIC PROCEDURES
(Continued)
SYSTEM-11 B SOUND CIRCUITRY TESTS (Continued)
If
the previous checks did not isolate the problem, tum the Volume Control for maximum output.
Momentarily touch a powered-up AC soldering pencil on the center tap of the Volume Control.
~~lUl'iiO(Q)~
DO NOT use a soldering iron over 40 watts. Note also that cordless soldering
irons will NOT work for this test.
Hearing a low hum or a 'click' indicates that the power amplifier (U1, TDA2002), the Volume Con-
trol, and the speaker are operating satisfactorily, as is the sound circuit cabling. Not hearing a
sound requires repeating the test with the Volume Control turned part way down, to determine
whether the Volume Control is faulty. Also, check the cable connectors for proper mating, and that
no broken wires affect this circuit.
FUSE LISTING.
CPUBd
1111
I
Intereonnect8
r
d.;;.._--+----+--15
16
L___ ~s;::::j--117
L
~======r_18
Fuse Placement Chart - Backbox Interior
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mUN
Fuse Listing -
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±100 Vdc Power Supply
+ 5 Vdc; ±12 Vdc Power Supply
±100 Vdc Player Score Display
25 Vdc Coil (F2A • Brn)
25 Vdc Flashlamps (F2C - Orn)
NC
Select Relay (F2)
25 Vdc Coil (F3 - Red)
25 Vdc Coil (F1 - Red)
50 Vdc Coil (F4 - Vel-Via)
50 Vdc R Flipper (F5 - Blu-Vel)
50 Vdc L Flipper (F6 - Gry-Vel)
50 Vac Input to 50Vdc Pwr Ckt
25 Vac Input to 25Vdc Pwr Ckt
and the Ball Ufter MJtor
13.5 Vac Input to +18 Vdc Lamp
CraJit
5.9 Vac Input (F1 : Lwr R Playfieldl
GnllUurrination)
5.9 Vac Input (F2: Marquee/Gnl
Ullmna1ion)
S.9 Vac Input (F3: Lwr Playfieldl
Gnllllumnation)
S.9 Vac Input (F4: Upr Playfieldl
Gnl H1urrination)
NOTE: All listed fuses are 250V, Slow-blow,
EXCEPT #14, which is a 32V. Slow-blow.
1 -
1/4A.
2 - 7A.
3 -
1/10A.
4 -
2-1/2A.
S -
SA.
6 - W6 (00)
7 -
2-112A.
8 - 2-1I2A.
9 -
2A.
10 - 2A.
11 -
2A
12 - 4A.
13 - 7A.
14 - 8A.
15 - SA.
14
16 - SA.
' .
One 8A., 125V, Slow-blow fuse is installed in the
Cabinet Line Filter Assembly, except for those
foreign games that require a 4A., 2S0V, Slow-blow
fuse.
17 -
SA.
18 - SA.
Figure 3. Fuse Locations & Listing,
/BAN7l.AlI I&[[JN -
7
8
9
-----ir+-'
10
11
"__~___'''C:!..J_
12
'----t-13