Star Tech Journal

Issue: 1995-September - Vol 17 Issue 7

STAR*TEcH
Journal
September 1995
CD
WILLIAMS
LAZER-TRON
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Email: startech@cyberenet.net
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SF"' on
CD-ROM
Every tech tip, game mod, test
procedure, Mfg change, update,
upgrade, precaution, etc.
for virtually all coin-op games
produced from
John Liikala
Canadian Amusements
Burnaby, BC Canada
Victoria A. Krenz,
Manufacturing Engineering Mgr.
Lazer-Tron Corp.
Pleasanton, California
PROBLEM
Long range opto error during
game play. (Note: Not during ser-
vice tests).
GAME
Four and Single Player Pogger.
PROBLEM
SYMPTOM
When the pinball is turned on, it
will cause auto loading of the
trapped ball on the lower right
hand trap where the ball gets
dragged across the play field.
This will happen when the game
is started every time.
CAUSE/ SoumoN
When ball is loaded into right
hand side trough, the ball will rest
on the metal bracket and will not
break the infrared beam being
transmitted by the transmitter
diode. Therefore, take the
bracket and reform it up so that
the ball is breaking the IR beam.
1979 - 1995
Some of our customers have ex-
perienced excessive wear on the
turntable belt and/ or a burned
out turntable motor.
CAUSE
We believe this is due to high
pressure applied to the turntable
by the tension wheel. The tension
wheel assembly is located along
the edge of the turntable. It has a
spring attached at one end and a
roller wheel on the other.
SoLUTION/PRocEDURE
With the belt removed and by
hand, you should be able to turn
the table freely. If not, you must
move the eyebolt anchoring the
spring until the table spins freely.
Every page (over 5,000!) of
STAR* TECH Journal
Now available on Disc!
CD-ROM technology:
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Best Information Retrieval Available!
See Back Cover For Details
T AITO REFOCUSES EFFORTS ON COIN-OP
Taito America Corp, a subsidiary of the
world's largest manufacturer and opera-
tor of coin-operated arcade games and
a major player in the home video game
software arena, is repositioning its ef-
forts in America.
Rather than develop consumer game
software for the many hardware formats
competing in today's marketplace, th
company is focusing its business plan
on the booming arcade and family fun
center establishments.
September 1995
CD
STAR*TECH
MIDWAY
MIDWAY
MoRTAL KoMBAT 3
KILLER INSTINCT
VERSION
2.1
CONTROL LOCK
Journal
UP
CHANGES
Williams/Midway Service
Williams Electronics
Chicago, Illinois
John Liikala
Canadian Amusements
Burnaby, BC Canada
Figure 1
SYMPTOM
Note: No game should use MK3
2.0 software. Reset problems
were inadvertently introduced in
this version. All games should
have version 2.1 installed.
When the left hand player chal-
lenges the computer, in the
middle of the game control is lost
and freezes in that position.
C=::Jc=J
c=ic=i
c=ic=i
c=ic=i
U98
A-5343-4004 7-1
Game EPROM
SOLUflON
v2.1 KAHAL REsET BuG FIXED
When playing Kahal, if a player
holds down punch for 2 seconds,
then goes towards, towards,
down, towards with the joystick
& releases hi punch, game resets.
v2.1 FREE GAME BuG FIXED
When a player finishes a one
player game, Kano and Kabo
jump on the screen during the
end if there are game credits. If
at the point that they land the
player hangs on the 2 start but-
tons, he will be allowed to start
at the bottom of the ladder again.
v2.1 CREDIT MEssAGE
Maximum Credits Message is
printed in a different position on
the screen. Now it is located at
the top of the screen and does not
interfere with the other text.
v2.1 COMPUTER SMARTER
Computer is no longer a sucker
_ for combo moves when being
attacked from behind. Computer
used to get caught by players who
would hide from behind.
Upgrade your program to ver-
sion 1.5 prior to this repair (see
figure 1 for PROM location).
Note: Check to make sure that
the PROMS that you are replac-
ing are the same speed as what
was taken out (27C040-10). In-
stalling a PROM with a speed
lower than 100 nano seconds, will
cause freezing. resetting and
strange problems to occur.
CPU/Sound Assembly
A-79650-40047
J AMM A
AnDmONAL PROCEDURE
After the PROMs are replaced,
a little work has to be performed
to the control panel. Attach two
lengths of wire from the power
supply logic ground to the com-
mon ground of the joysticks of
each player. This is done because
the ground coming from the har-
ness which is plugged directly
into the computer board, some-
times loses connection thus,
player control is lost.
The PROM upgrade corrected
program problems that were
over looked in version 1.4.
Ju~~~ ~ooN
~~ Yov~tNK
Yov Hf\'Jtlffe
Wof®tD ~100 °Ill._
You crer
~eNI)t}D.

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