Star Tech Journal

11
STAR*TECH JOURNAL/DECEMBER 1983
"Astron Belt" continued from page JO.
MAINTENANCE
Cleaning the player
• Use a soft, clean cloth to wipe off dust and
dirt accumulated on the player. If necessary,
moisten a soft cloth with diluted neutral
detergent to remove heavy dirt.
• Never use paint thinner, benzene, or other
solvents. They react with the surface and
cause color changes and melting.
Video disc care
• Video discs are made of hard plastic. Use a
soft cloth to lightly wipe off dust and dirt.
• Finger prints and dust on the video disc do
not affect the recorded signal. However,
excessive dirt may interfere with reproduced
picture quality, so it is a good idea to keep
the video discs clean.
• Therefore, it is best to handle video discs by
the outer edges and center holdonly,just as
you would do with ordinary phonograph
records.
• Always replace discs in their jackets after
use. To prevent warping, keep discs away
from high temperature and humidity.
Objective lens care
The objective lens is a key part of the player.
Note that the lens surface must be clean in
order to maintain best performance. Never try
to touch the lens surface. Hold the lid closed to
keep out dust and dirt unless it is necessary to
open for installing and removing a video disc.
If an amount of dust or dirt becomes heavy
enough, it may degrade picture quality. Dust
can be removed from the lens with an air
blower for a camera lens.
ASTRON BEL TVIDEO DISC PRECAUTIONS
WARNING. Game cabinet MUST NOT be
moved without first securing video disc player.
See instruction labels inside cabinet for proper
securing procedures.
To open player, connect power cord of
game to outlet Pull out safety interlock spring/
button near game power cord.
(CAUTION: Game is now energized.)
O.E.M. Replacement
Monitor
Actuate power switch, then press eject
button. Lid will open slightly. ( If lid does not
open, see owner's manual.) Open lid. Loosen
shipping screw near center of table, and remove
lens cap. Store lens cap onto boss on underside
of player cover.
Place disc on turntable. (Refer to label for
proper side down.) Close lid.
Reattach bracket.
Slide shelf forward.
Reinstall screw into shelf.
Press play button.
IMPORTANT: Clean disc once every
other week either with warm soapy water or
Windex. Rinse thoroughly to remove all cleanser
residue. Air dry completely before reinstalling.
(CAUTION: When transporting game and
during long idle periods, remove disc. Reinstall
lens cap and tighten shipping screw.)
Align arrows before tightening shipping
screw.
FILTER CLEANING
To prevent an overheating condition, the fan
filter must be vacuumed every two weeks for
proper air circulation.
ASTRON BELT LASER DISC
The laser disc has been programmed on both
sides. When, if ever, the top side is damaged,
the disc can be flipped over and played.
Guarantee 90 Days Exchange
,~
...
"\,
'' /,
Superior
Brightness,
Clarity, Sharpness.
For Info. Call: (213) 768-7144
• spectra
ASTRON BELT LASER DISC STORAGE
8Dvts1on
When the game is inoperative for a long period,
remove the laser disc and store it in a vertical
position.
Storing it in this manner will prevent a
warping condition.
Sun Valley, California
ASTRON BELT FALSE ERROR MESSAGE
Subject: IC-I Bad in Self Test
IC-I (5473B) has been newly added to your
game's EPROM PC Board.
This can cause a properly functioning game
to give a false error message in the self-test
mode.
As long as your game is functioning properly,
disregard this message.
~VIDEO
~GAME
TROUBlfSIIOOTING
GUIDE
GINO RONDINA
RALLY VIDEO CAR CIRCUIT OPERATION (PART 2)
FOR
By Duane Erby, Kiddie Rides USA, Davenport, IA
In this article, we will discuss four subcircuits
·used in the Gino Rondina Rally Race Video
Car. These four circuits are the heart of the
system. They generate the timing and control
signals and some of the actual video to the
screen. Other signals are encoded and used to
drive the actual video generating circuits. There
are several PROM chips (PROGRAMMABLE
READ ONLY MEMORY) that are addressed
and their memory contents multiplexed to
configure the serial stream of information
required by the video output circuits. Now to a
brief overview of the subcircuits to be discussed
The first subcircuit (A) is the main timing
oscillator and dividers. These signals are the
main control signals that assure the picture and
all effects are synchronized with respect to the
main MHz oscillator.
The second circuit (B) generates the basic
control pulses that are used to construct the
bonus markets that appear along the sides of
the road The output signals are labeled Q 1 OPT,
Q20PT, Q50PT, and Q GAS.
The third circuit ( C) to be discussed is a
19"- $188
13"-$110
rather complicated way to, in effect, cause the
road to curve after the score reaches 400
points. Op amp F9 (LM399) outputs a pulse
train of varying time period. This changing
pulse train clocks IC Cl0, a 7473 Dual J-K
Flip Flop. The varying output of C 10 alters the
number of times per second that B-10 (Bi-
Quinary Dual Decade Counter) is reset This
alters the timing of the "road" clock that can
create road movements on the screen. Driver
car movements (red car) are done using the
same method.
The fourth subcircuit generates serial pulse
trains that are actual video signals for generation
of trees, the road (less center line) and the
bonus markers.
More detail on circuit A.A4 is a crystal
controlled oscillator that employs inverters.
A4c is its buffer. C4 (a dual BCD counter)
divides the 4.5MHz ( output ofFF B4) further.
B4, D2, and A4 set the modulus ofC4B. A4b
and A4c inverted signals are required elsewhere
in the circuit The arrangement ofD4, B5 , D2,
Continued on page 20.
VIDEO
GAMES
•CUT TO THE PROBLEM IN SECONDS
• EASY TO UNDERSTAND
• DESIGNED FOR OPERATORS,
ARCADE OWNERS & TECHNICIANS
• LAMINATED FOR DURABILITY
• UNCONDITIONAL MONEY BACK
GUARANTEE
CHECK QR
MONEY ORDER OR
SEND
•
COD
$12 95
VIDEO
Please send
I TROUBLESHOOTING
I
GUIDE
VIDEO CHARTS.
TOTAL ENCLOSED
I
I
: RICH~5Nt.sJtio8s SHIP. CHG. INc.
TO SEND C.O.D. CALL 816/776-5938
I I
I
I
I
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