Star Tech Journal

Issue: 1990-September - Vol 12 Issue 7

.
~ Hantarex
MTC 9000
Introducing the
Dynamo
Pix Width
Jean-Guy Hardy
Service Coin Ltd
St. John, New Brunswick, Canada
POWER PlUSI
PROBLEM
Picture width has changed and there is no
control of the horizontal amplitude control.
Dynamo's newestinnovation - the
POWER PLUS, a power supply for the
90's will increase your capacity and
keep your games going longer!
SOLUTION
Replace capacitor C42, 4. 7 uf/50 volts.
CAUSE
Hantarex: makes use of transistors Tr 16 and Tr
17 as a resistive load control circuit in series with
the bridge coil B3, horizontal linearity coil Bl
and the horizontal yoke to control the amplitude
of the picture width.
{ Tr 16
Rv4
Horizontal~
Applitude ~
j
C42

150 watts, 15 amps at 5
volts increases capacity
for growth.

Adapts to either 110 or
220 currents for
operation in any
country.

External 15 amp
fuse andEMI
filters offer
increased protection.

Adjustable by 5 volts to
adapt to any game.
Tr 17
Simplified Drawing
~
Capacitor C42, shunts the collector circuit of Tr
17, to provide an AC signal path. When C42
becomes open the picture will decrease in width
and even with Rv 4 turned to maximum width
amplitude, Tr 17 will still not provide the AC
shunt required for the signal.
NOTE
One of the reasons that C42 will become open is
that it is located near R97 which gets warm and
tends to diy this capacitor out.

AMOA standard 3 - and 9-pin MOLEX connectors
for simple :installation.

Built-in a.c. receptacle for easy access for repairs.
'
Dynam.o's Response to Air Hockey
Coin Mech Problem.
Mark Robbins
Dynamo Corporation
Richland Hills, Texas
SUBJECT
The problem which Bob Hade ofIBI Games had
with his Air Hockey push chute coin mech (see
S,n'J June '90) is one in which we are familiar
with and is relatively simple to solve.
DESIGN
The design of the coin switch bracket is ifltended
to provide extra additional anti-cheat protec-
tion.
to look through the two holes near the access
door, just open the coin door and eyeball it.
A slight adjustment of the extension up or down
is all that is usually necessary. Another alterna-
tive is to bend the metal guide bracket up and out
of the way. This reduces its potential anti-cheat
capability, but a number of operators have done
this with no problem whatsoever.
Toe coin mech extension,
when it trips the switch,
goes between a molded
plastic piece below and a
right-angled metal guide
piece above.
NOTE
Finally, I would like to en- ~
courage all operators to
bring any problems with Air
Hockey to my attention, no
matter how small they
might seem to be. Call me at
Dynamo (800/527-6054)
or
contact
your
distributor's service de-
partment.
This provides protection
against the unlikely possi-
bility that someone could
cheat the machine by
pushing the slide in and
jamming it up and down
hard enough to trip the
switch.
Operators may not always
realize how important they
are in providing feedback to
manufacturers.
CAUSE
Toe possible cause for the
misadjustment was men-
tioned in Bob's previous
article. Toe extension may have gotten bent
inadvertently during collection, by banging the
floor or whatever. (Sometimes things get jarred
during shipping so a new table could have such
a problem.)
SOLUTION
In either case, a slight bending of the extension
up or down will eliminate the problem. No need
There are hundreds of parts
in every machine and the
slightest variation here or
there can cause unforeseen problems. Your in-
put is vitally needed to make the machine, in this
case, Dynamo Air Hockey, as trouble-free as
possible.
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