Star Tech Journal

.
~ 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.
'