Coin Slot

Coin Slot Magazine - #090 - 1982 - August [International Arcade Museum]
much about it as you could tell me, including the
current value.
B.B.B.
Helena, Montana
the current in this common circuit the larger the
voltage drop between the transformer and point "A"
resulting from any unwanted resistance in this common
circuit. The resulting voltage at point "A" would be the
transformer voltage, "E(S)," MINUS the voltage drop
through the common circuit components.
The resulting voltage at point "A" can be considered
as the supply voltage to each of the individual circuits
fed by the common circuit. As you can see, the lower
this supply voltage to a circuit the less chance that
circuit has to operate properly. Now, since the individ
ual circuits attached to point "A" are, for the most part,
being turned on and off (sometimes drawing current
and sometimes not) during operation of the game, the
resulting current flow through the common circuit is
always changing, thus the resulting voltage drop (and
hence the supply voltage to the individual circuits) is
also changing. It should be plain to see that this
condition can result in intermittent problems occurring
in the game's operation.
Dear B.B.B.:
Your machine was made by the Buckley Manufac
turing Company in Chicago probably around 1945. For
a detailed history of your machine The Coin Slot Guide
No. 25 is the answer. $1,300 to $1,500 should be the
current value on your machine.
Dear Pappy:
A friend and I have had a slight disagreement. He
says Bally Manufacturing has made substantially more
slot machines than Mills Novelty Co., and I think he is
wrong. Can you tell me who made more machines?
R.M.
Washington, D.C.
Dear R.M.
You are right! Mills serial numbers are in the 600,000
range and Bally has probably not produced over a
quarter of a million. Don't forget, Baliys market is
limited to Nevada, Atlantic City and exports. Mill's
market was the world!
If you have questions, please send them to:
Larry Lubliner
c/o Bandits
458 Central
Highland Park Illinois 60035
.com
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w of electrical circuits is such that
operate. The behavior
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the total h
current flowing through the common circuit
would be the sum of all the individual currents flowing
in the circuits fed by it. You can also see, from the
previous disscussion of voltage drop, that the larger
1982 Arcade Museum
© August
The International
It should be kept in mind that all these
problems can only occur if there is unwanted
resistance (caused by a malfunction) in one
or more of the components in the common
circuit. If all components in this circuit had Zero(or very
little) resistance, the voltage drop across them would
be Zero (or very small) no matter how much current (i.e.
one or many circuits operating) was flowing. A good
test to see if this type of problem is occurring is to use a
voltmeter to monitor the voltage at the common
connection point (point "A" in the example) during
actual playing of the game, to see if the voltage
fluctuates to any great degree (say more than ten
percent). If it does, then either the Zero Ohms Test or
the Voltage Drop Test can be used to isolate the cause
of the problem (the component(s) having unwanted
resistance).
This concludes the discussion of circuit theory.
While at first it may seem highly technical, the principles
are really quite simple and logical and, when under
stood, are of great value in enabling one to understand
why things happen as an aid to diagnosing malfunctions
in a game. Next month some typical types of circuits
will be described, and their operation will be discussed
step-by-step.
Correction
In the July issue of The Coin Slot an error was made
in Russ Jensen's article, "Pinball Troubleshooting,
Part 6, Basic Circuits." Some copy was inadvertently
left out of the third paragraph, first column on page 39,
the note about parallel switches. This paragraph should
have read:
(NOTE: If more than two switches are connected
in "parallel," their function would be the functions
of each switch connected by OR. For example:
two normally open switches("A" and"B") and one
normally closed switch ("C") connected in "par
allel" would have thefunction"A"OR"B" OR NOT
"C." This would appear to be reasonable, since for
current to flow in a "parallel" circuit any one
switch need only be closed.)
We apologize to Russ and our readers for this error
and hope it has caused no inconvenience.
THE COIN SLOT-49
http://www.arcade-museum.com/