Star Tech Journal

4 _ _ _ _ _ _ _ _ _ _ S~~TECH
Universal
"Magical Spot''
Audio Modification
MAIN TRANSFORMER
In the first "Magical Spot" Upright
games, the Audio Voltage to I.C.'s 7 & 8
is too high.
The symptoms of this problem are either
no audio or audio fades out after turn-on.
To correct this problem, disconnect the
two yellow wires on the main transformer
and reconnect them to the two green
wires on the same transformer. This
lowers the Audio Voltage from 20.3 volts
to 18 volts.
MAIN TRANSFORMER
Midway
"Space Encounters"
Monitor Adjustment
Subject: Special Wells Gardner Monitor
Adjustment to prevent Distortion
1. Measure collector voltage at
Transistor 0203 and adjust to 64VDC
using the Video Bias pot R206 (with
contrast control at minimum setting).
2. Adjust brightness control to a
minimum setting (counter-clockwise).
3. Adjust contrast control to 20 degrees
of maximum (clockwise).