Star Tech Journal

Issue: 1991-August - Vol 13 Issue 6

Cellular Telephone
Static Cures
Wnis Progranis Out
Hardware Failures
Bill Johnston
Johnston Video
Buffalo, New York
Larry DeMar
Williams Electronics
Chicago, Illinois
SUBJECT
SUBJECT
Service tip for your mobile phone. In our van,
increasing problems of static noise on the cellu-
lar phone was making me crazy.
For the problem of "what to do while you're
waiting for the part". In the case of the Fun
House's Trap Door, as well as the Steps Gate and
Rudy's Mouth, there are adjustments to disable
these mechanisms, and compensate in the soft-
ware.
SYMPTOMS
I went through the system for antenna problems
and reset with power problems, etc, with no
luck.
This went on for months while I avoided the
inevitable high-cost service call, expecting a
$120 bill for what is now a $1 phone (with a 12-
month contract, of course).
SOLUTION
I
Tums out to be a corroded battery terminal in
the van. Cleaned it up and now the cellular
phone has absolutely static-free clarity again,
just like when it was new 5 years ago.
I feel just a little bit dumber and smart.e r at the
same time. So, I guess that whether it's a video
game or a cellular phone, check the power
supply.
Evan Wessel
Mercury Amusement
Havertown, Pennsylvania
II
Glass mounted cellular antennas are the cause
of most static and disconnects. As soon as I went
roof mount, my problems almost disappeared.
SOLUTION
PROCEDURE
These adjustments are the last few in the "fea-
ture adjustment" menu.
• For the Trap Door, you need to cover up the
hole, and set "Disable Trap Door" to "yes". The
game will not try to operate the door, and will use
the switch above the door to indicate a hit.
• If you lose a Rudy Jaw gear, set "Disable Rudy
Jaw" to "yes" and force his mouth open. The
game will not operate the Rudy Jaw motor.
FACTORY Poucy
Our software staff is constantly trying to come
up with new ways to keep the games running,
while reporting problems that we come across.
We also try to design game rules with the possi-
bility of component failure in mind to make sure
the player can still get most or all of the major
features as different parts stop working.
We are also striving to limit the failures through
better mechanical design and quality control,
but it never hurts to have a really large safety net.
It has been a company-wide policy to program
the games in this manner. Its a philosophy that
we started on High Speed, and have been refin-
ing ever since.
Phone & Fax
See page 21 for updated manufacturer
customer service phone & fax numbers.
* * *
Use Circuit
Breakers Vs Fuses
Erik Wittenzellner, Service Manager
Kemp Enterprises. Inc.
South Windsor. Connecticut
Beckman
DM25XL
Multimeter
EASY ro UsE, LARGE D1sPLAY, Low Cosr!
PROBLEM
One of the most aggravating things that a tech-
nician can have happen is to replace a blown
fuse. only to have it blow seconds after you
install it.
• 29
• Bu1LT-IN
20
RANGES
MHz LOGIC PROBE
• CAPACITANCE MEASUREMENT To
20
MFD
2000
AND De
• RESISTANCE MEASUREMENT To
SOLUTION
I find that this can be expensive as well as an
extreme hassle. To solve this problem. I have
acquired some low amperage circuit breakers
and put clip leads on them. I have several
different values: 2 amp. 3 amp. 5 amp and 10
amp. I now use these while I'm troubleshooting
the circuit instead of a box full of fuses.
MEGOHM•
1 O AMP
RANGE Ac
• TRANSISTOR GAIN MEASUREMENT
SOURCE
These breakers cost about $5.00 to $10.00 each
and are an asset to any technicians box. They are
available at most electronic stores and are
manufactured by Potter & Brumfield. The part#
is W58-XB1A4A-(Amp Rating).
Endless Greenwald
Coin Chutes
Todd Erickson
Summit Amusements
St. Paul. Minnesota
PROBLEM
The ends have been breaking off the Greenwald
coin chutes. They knew about the problem and
added a metal support to some production units
but never released it to the field.
SOLUTION
If you have a breakage problem contact either
Greenwald Industries at 800/221-0982 (Harry
Silberglib) Valley. Dynamo or your local dis-
tributor for replacement.
New! Best of STAR*TECHJournal.All about Switching
Power Supplies. From the very beginning! Switchers are
covered from when they first appeared in our Industry
up to the current models and uses.
Theory and Circuit Analysis. Voltage Measurements,
Substitute Parts and Failure Modes.
Modifications. Getting negative voltages from posi-
tive-only switchers, Identifying power legs on ICs,
Capacitor Replacements.
Troubleshooting. Peter Chou, Condor, Wico, Power Plus,
Nintendo, Sieracin, HiTron, Penn-Ray.
Never before published information outside of our
journals. This info can not be found in any ofour current
service manuals.
So, if you 're looking for the definitive word on Switching
Power Supply servicing and repair, this is it. Now, you can
detennine if that switcher is repairable or simply not worth
your time. Look up the symptom, perfonn the solution and
you 're back in business. Take another look at that pile of
useless supplies in the corner of your shop -are thay really
beyond help? Maybe not! $29.95 (plus $3.50 s /h) NJ add 7%.
STAiiJTECHJoUrnal PO Box 1065,
Merchantville, NJ 08109. 609/662;.1080

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