Star Tech Journal

TEST OPERATION
To operate the unit, you just plug the tester
in the AC outlet in the machine, turn the
game off and unplug the jacks that come
from the driver boards. With the probe tip
and the clip lead, you apply the test voltage
across the coil and observe the two LED's.
Note: A shorted circuit condition could be
the diode or a coil related problem.
PARTS LIST
Rl = 5.1 ohm resistor 5 w
R2 = 100 ohm resistor l/2w
D 1 = Light Emitting Diode
D2 = Light Emitting Diode
Tl = Transformer 110 volts
primary/6.3 volts@ 300ma
NOTE
You can also check coils that you have in
your parts box before installing them.
LEGEND
.. 1 LED on and 1 LED off
= Good Diode
.. Both LEDs on at same time
= Open Diode
.. Both LEDs off at same time
= Shorted Circuit
The assembly of parts is not critical and you
can use the case of your choice and style .
The transformer can be a DC adaptor that
you can modify to get an AC output. I hope
you enjoy building and using your In-Circuit
Diode Tester.
Steering Wheel
"Shifter"
HAPP CONTROLS Manufacturer and Distributor of Game Controls
106 Garlisch Avenue • Elk Grove Village, IL 60007
Phone: 312/593-6130 • Telex: 297-249Ur • Fax: 312/593-6137