STAR*TECH Joumol
0
ARACHNID
April 1993
ATARI TETRIS
No
DARTS
PICTURE;
MONITOR
BUT
UNSTABLE
SELF TEST
OK
DATA EAST
TIME MACHINE
No DISPLAY
No HI-VOLTS
John Michael Bevar
Ries Amusement Inc.
Denison, Iowa
William Simpson
Greenstone Services
Wheeling, Illinois
Scott Serpa
Arcade Services
Albany, Oregon
SUBJECT
PROBLEM
SUBJECT
Arachnid 6000 Series Darts
In the game mode there is no
picture, but in test everything
looks good.
Data East pinball power sup-
ply.
PROBLEM
Unstable picture and/or sync
with little to no contrast
screen control.
SYMPTOM
SOLUTION
Put the game in test, go to
bookkeeping and write down
the numbers, now clear book-
keeping.
SOLUTION
At first look you might think
it's a monitor problem but it's
not. I found Ql (2N2222 or
ECG 123A) on the Main Game
Board leaky, sending a video
signal to the monitor that's
weak or unstable.
Go back to game mode, if the
picture is back and everything
looks OK, you can re-enter the
bookkeeping data.
Data East pinball (Time Ma-
chine) that has no display.
SOLUTION
Check for+ and- 100v. If one is
missing check not only the
100v zener diodes but the 39k
resistors at RB and R9, if one
opens up or changes value it
could keep the respective tran-
sistors from turning on.
INvENTORY ALERT
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Don't Let Those Time & Money Saving
Mod's, Fixes & Technical Tips
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In my most recent attempt at
an onsite repair, I found that
the 100v zeners (that I do keep
in the truck) were ok and that
the 15 cent resistor that
should be 39k ohms was now
about 4 meg and 62 miles
away. Where is a Radio Shack
when you need one?
..
• (dn<::f 'y't>µr compariy's) qqf ih fr§htWrth the most progr~Ni~
technicians in ·tt1e C9ib-op lr1ddsfry. Shore the knowledge!·
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PO BoxTa,s, M~rchantville, NJ 08109 •
Phone: @1662--Joso Fdx.-·@;662-0531
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