Star Tech Journal

Atari Hard Driving
Jerky Steering
Electrohom.e G07
Vertical Deflection
Mark McAvy and Bruce C. White
Fun Factory
Kennesaw, Georgia
James Beck
Greater Southern Distributing Co.
Atlanta, Georgia
PROBLEM
PROBLEM
We had no shifting control. The steering was
erratic and would only work on half of the
screen, and the coin mech lights were dim.
SOLUTION
A slo-blow 3 amp fuse took care of the dim
lights and the steering then worked across
the whole screen. The shifter was not yet
working nor was the jerky motion of the
steering wheel solved. After talking to Atari
and getting voltage readings for the main
PCB, we still could find no problem.
We then noticed that a resistor on the sbifter
PCB assembly seemed burned. After check-
ing R28 and found that it was bad, we also
checked QS and found that the +5 volt
regulator was also bad. The replacement
was made and the board reinserted back
into the game. The shifter was working and
had complete control over the steering with
no jerky motion.
Concerning an Electrohome GO7 Robotron
monitor: No Vertical Deflection and FR401
(68 ohm, 2 watt fusible resistor) keeps open-
ing. Known good: Deflection yoke, R414,
R415 and C412.
SOLUTION
Check these suspected parts for failure:
X402
X401
D401
C411
(may be shorted)
(may be shorted)
(open or shorted will
cause problems)
(may be shorted)
NOTE
Make sure you're replacing FR401 with a
wire-wound replacement and NOT a carbon
type.
Electrohom.e G07 Replacem.ent Capacitor
Mike Cowen
Video Images
Scottsdale, Arizona
PROBLEM
If you are having trouble finding a replace-
.ment capacitor for the main filter C604, try
checking with your local Panasonic
(Matsushita) parts distributor.
SOLUTION
They should stock an exact replacement
part or they can order it.