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!