Star Tech Journal

Issue: 1990-June - Vol 12 Issue 4

Dynanio Air Hockey
Coin Mech Probleni
Fabtek Toki
Dipswitch Bypass
Bob Hade
TBI Games
Rockford, Illinois
Doug Hutton
Heavenly Amusement
Poway, California
PROBLEM
Whoever designed this coin mechanism should
have his head examined! I'll bet anyone who's
put one of these out on the route has had prob-
lems with the coin mechanism, (i.e. trip wire,)
inside the coin box.
PROBLEM
How many of you are pleased with the fact that
when you turn this game on, it comes up show-
ing the dip switch settings and their interpreta-
tions!
SOLUTION
I just came back from location, and I tell you
they're nothing but a pain in the neck. The
biggest problem is that you have to look through
two little holes in the access door to see which
way you have to bend the extension on the coin
mech to get it to go in between two pieces, metal
and wood.
CAUSE
We've put out 3 in the last 3 months and they've
all had this same problem. What must have
happened here is that it was initially set right,
but the route collector must have set the unit on
the floor, thereby moving the extension a little
bit.
I can't imagine a company this big doing such a
crappy job on this part of the machine. Sure it
can be worked out, but what a extra pain in the
neck.
Not only did our 3 all have this problem, but I
know of a bar owner out of town who bought one
and had the very same problem! Four out of four
looks like they're batting 100 percent.
I, for one, would not like to see kids turning the
game off and on to see if the game is set harder
than at another location, or gives fewer free men!
SOLUTION
A quick solution is to switch the player two start
wire from the normally open (NO) terminal to the
normally closed (NC) terminal on the 2P start
button. This way, the game immediately exits
the dipswitch settings screen upon power-up
but does not prevent lP games or the "continue"
function.
Willianis F-14
Randoni Tilting
Todd Tuckey
TNT Amusements
Southhampton, Pennsylvania
PROBLEM
I have had several different Tomcats that would
tilt out inexplicably. I changed all the flipper coil
diodes, CPUs and resistor packs all to no avail.
CAUSE
Then, I discovered the left flipper lane change
switch was factory wired so that the diode was
not in the circuit! If both bottom flippers were
up, and the left sling shot was hit - instant tilt.
SOLUTION
I checked over one dozen of my Tomcats and
three were wired wrong! Simply move the wire to
the other side of this diode and instant cure!
Ninja
Gaiden IC Seating
TeCDlO
Midway Galaga
Older WG Monitors
Jim Santa Cruz
Tecmo Inc.
Carson, California
James Beck
Greater Southern Distributing
Atlanta, Georgia
PROBLEM
Nirya Gaiden can develop various intermittent
SYMPTOM
problems. This board, as well as most new game
boards, contains several custom, surface-
mounted controller IC chips.
The screen on the Midway Galaga video, which
uses the Wells Gardner monitor, changes to a
dominant green or blue background with verti-
cal retrace lines. The color amp drivers are all ok.
CAUSE
CAUSE
A common problem with these chips is that, with
time, a pin(s) can become disconnected from the
board. This can cause many different symptoms
from loss of partial video to total reset (lock-up).
More than likely, it's CR'f failure. The indication
is that there is probably oxidation particles
laying between the electron gun and either the
heater or G 1 grid.
SOLUTION
To clear this problem on Tecmo boards, first call
SOLUTION
our customer service tech to help you to isolate
which chips and which section the problem is in.
Secondly, check each pin's contact by carefully
pushing out on it one at a time.
REPAIR
If you are an experienced solderer, you may
want to attempt these repairs yourself, but
remember: These pins are closely seated next to
each other and that this is a semi-difficult
procedure. Resoldering the intermittent con-
nection is the only sure way to eliminate future
contact problems.
NOTE
If you do it and repair it yourself, great! But, if
you in any way damage the chip or board, you'll
be looking at an expensive manufacturer repair
job. Finally, if you'd rather we did the repair, call
your local distributor to set up a board r~tum.
For more information, contact Jim Santa Cruz
at Tecmo Inc.
Ill . .
Since this is a very old and used monitor, before
you replace it (on what now is a marginally
profitable game) try this: Blow it out!
I have had good results blowing off these shorts
with a B&K brand CR'f rejuvenator. This test
unit provides a charge designed to free the
internal tube elements of shorts from small
particles and will either cure it or finish it for
good!

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