Play Meter

By Tom Howarth of Amusement Game Services
~I solution
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tive terminal over center of hole,
mark chassis at negative terminal.
Drill hole in chassis to accommodate
screw for negative terminal.
Mount new capacitor negative
terminal to chassis with screw . Use a
star washer to insure good contact .
Install a solder lug under positive
screw of cap , tin lug and solder
terminal of old cap to lug , wires and
all . Splat-new C47!
To insure that the new C4 7
doesn't move around and cause
grief, apply a wad of silicone RTV
(silicone rubber bathtub caulk) be-
tween top of chassis and cap .
Transistor sockets are great for
mounting the TV's devices; how-
ever, they just can't seem to hack it
when used for power supply pass
tran sistors. The two leads on Q20
should be soldered in the socket.
This job is not as easy as it looks,
because the leads of Q20 have been
,.-rnnning super hot for a long period of
fime and will be reluctant to tin easily .
They can , however, be roughed up
with a small file and should then take
solder. Secondly , the socket solder
terminals may fall off when worked
with . If this happens, solder wires
directly to the two pins of Q20 .
On the Trivia Mon itor , the pow-
er I audio board , located in front of
the power transformer, has been
modified so that + 5 volts is
adju stable via trim pot on the board.
This modification has been done to
co mpensate for losses at connections
in harness . Always adjust + 5 volts
measured on logic board .
Other games using the Monitor
+ 5 volt power supply (XM501 and
70 1 Type) , can be made more
reliable by making this simple
modification . Simply replace R91 ,
1.8k resistor with a 2 to 5 K trim pot .
Pot wiper and one lead must be
common.
FUSE: F NEW GUY
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NE.W C47
50Lt::>E:R HERE
Figure Two