•
April 1992
Gottlieb/
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Catastrophic
Failures
STAR*TECH Journal
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PROBLEM
,-,,, But the point I'm making here is
that in all four cases I was able to
replace one IC on the control
board, get the machine to power
up and go to work from there.
MONITOR UPDATES
All monitor articles
Over the last year or so I've ran
across four Gottlieb pins that
wouldn't power up, two of which
were damaged in electrical
storms (lightening ... the techni-
cians most dreaded word).
Anyway, once you get them to
power up, you'll usually find a few
fried IC's and/or transistors on
the control board.
1990
1991
1992
covered in 1989/'90
or 1990/'91 or 1991 /
Address Changes
'92 published in a
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video monitor Symp-
Thank you!
viously appeared in
SOLUTION
The culprit was always U4
(R6532P Priot) in the switch ma-
trix circuit.
toms and Fixes in
each. These tips pre-
STAR*TECH Journal's
Volume l l, 12 or 13.
Bally/Wms
Lo Solenoid
Voltage
L
A
STAR*TECH
L
JouRNA
cal library with these
FIRST FoR ALL VouR
TEST EQUIPMENT NEEDS
valuable references.
DIGITAL MUTIMETERS
PROBLEM
Solenoid B+ (34vdc) low
23.7vdc).
Update your techni-
C
(@
~SOLUTION
Check for cold solder joint at or
replace C5 (l00u @ 100v) on
power supply (D-8345-1914).
PARTS TESTERS
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