Star Tech Journal

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WilliaIDs The
Machine Sw Matrix
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Wells Gardner K-
7000 Series
RandyTeny
Alpine Amusement
Connersville, Indiana
RandyTeny
Alpine Amusement
Connersville, Indiana
PROBLEM
PROBLEM
When ball ejects from head/mouth saucer and
activates top wireform switch, the slam tilt
switch activates.
No raster.
SYMPTOMS
In switch edges test the top wireform switch
(#71) reads slam tilt, bottom wireform switch
(#72) reads coin door closed.
SYMPTOMS
No high voltage, B+ high (130-160vdc).
IC2, IC4, QlO, Ql 1, D10, D12 and C36 known
good.
CAUSE
Poor (if any) filtering of B+ out of regulator IC4.
CAUSE
Short in switch matrix.
SOLUTION
SOLUTION
Replace C57 (47uf@ 160v) with one rated
200v.
Check your left mini-exit switch (#74) for a
shorted switch or diode, or most likely diode
shorting across switch.
@
NOTE
Check this cap. especially if high voltage is
intermittent.
NOTE
Make sure this switch has one of the protective
rubber covers on it.
Phone & Fax
See page 21 for updated manufacturer
customer seNice phone & fax numbers.
Gottlieb System
80 B Pinball
RandyTeny
Alpine Amusement
Connersville, Indiana
SUBJECT
Gottlieb pins utilizing alphanumeric display
boards part #'s MA-644 and MA-644F.
* * *
MURPHY'S LAW
# 1308
PROBLEM
Displays flicker.
CAUSE
Poor (if any) filtering of -45vdc from bridge recti-
fier (CRl-4).
SOLUTION
Replace Cl (470uf@ 50v) with one rated@ 100v.