Star Tech Journal

Issue: 1988-August - Vol 10 Issue 6

August 1988
Kranier High Speed
Bonus Diode Mod
Drew's Card Ganies e
Power Supply Adj
Ronnie Belitz
Lark Amusement Inc.
Bristol, Tennessee
Service Department
Drew's Distributing Co., Inc.
Fairforest, South Carolina
SYMPTOM
Coin lock-out coils and front panel lights fail
and/ or game goes into a reset condition after
several hours of operation.
PROBLEM
We have experienced complaints of white
screens on our card games. While each game
is checked here, it never hurts to check and
be sure.
CAUSE
Recent shipment of these games have Dl0
and D9 used in the power supply inter-
changed. Dl0 is a 1N4750B/28V zener
diode and should have the cathode tied to
the base of Ql and D9 is a 1N4148 diode in
series with Dl0.
CURE
Remove D 10 and D9 and interchange.
COMMENT
When these diodes are incorrectly installed,
it allows 45V to reach the LM7824 and the
LM7812 regulators -causing them to shut
down due to overheating. When the diodes
are installed correctly, the voltage
to the regulators should be 28V.
SOLUTION
Set the power supply on all of our card games
at 5.30vdc +/- .05v. This is best accom-
plished with a digital multimeter.
PROCEDURE
Look at the top of the power supply from th: e
back of the game. Select the 20 volt de scale
on the multimeter. Connect the black test
lead to any of the three black wires coming
out of the top of the power supply. Put the red
test lead in the socket that has the white with
red stripe wire coming from it. Adjust the
potentiometer until the multimeter reads
5.30vdc +/- .05 volts.
Data East Heavy Barrel Video Wave
John M. Bevar, Service Technician
Ries Amusement Inc.
Denison, Iowa
SUBJECT
Wavy lines in picture.
SYMPTOM
New game kit when installed develops wiggly
e
lines and cannot be adjusted out. A conflict
of grounds exists.
SOLUTION
Remove the earth ground strap going to the
monitor chassis.
(
August 1988
Bally Party Animal
Pinball Coil
STAR*TECH Journal
Darryl Williams
Romstar, Inc.
Torrance, California
PROBLEM
Right saucer and left bottom saucer.
SYMPTOM
Number 3 player start button does not
work.
SOLUTION
Remove the 29-2100 coil in each saucer and
install a 2 7 -1300 Bally coil, which will kick
the ball out easily and will not damage the
playfield.
)
Ronistar Gold
Medalist Start Mod
Ed Romasko
Penn Vending
Bensalem, Pennsylvania
SYMPTOM
With ball in saucer, eject arm will energize
and will keep trying to eject ball, and will
keep trying until coil burns up, and possibly
shorting out their associated transistor driv-
ers which are Ql5 and Ql8 (Tip 122).
e
5
CAUSE
Ajumpermaybe required atJPl position a3
to b3 located at 2c on the PCB (near dip
switch 1). Not all PCBs will require this
modification but if the Third Player Start
does not work, then this modification will
solve the problem.
We apologize for any inconvenience this
problem may have caused. Please refer to
the manual for proper adjustment on the dip
switch setting for your type of location (i.e.,
Arcade, Street Location, etc.).
SNK Fighting Golf Prograni Update
James Beck
Greater Southern Distributing
Atlanta, Georgia
PROBLEM
Game play on this one is "too fast for new
players," said SNK Corp. of America, so
they've released updated program chips that
gives novice golfers more time to aim, select
clubs and make their shot.
-
IMPROVEMENTS
* The original program gave players 10 or 12
seconds to make the shot (operator's choice);
the new program gives players 12 or 15
seconds.
* The power gauge (swing gauge) moves
slower when a ball is on the green, allowing
greater putting accuracy.
* Finally, the hit check area around the cup
is enlarged for easier putting.
ORDER INFORMATION
These new ROMs are available to all opera-
tors who feel the above changes would en-
hance player enjoyment and acceptance.
Chips have been shipped in quantity to all
SNK authorized distributors; they're avail-
able free upon request to owners of the
game. All new units of the game will come
with the chips already installed.

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