Star Tech Journal
Issue: 1992-September - Vol 14 Issue 7 - Page 14
STAR*TECH Journal
m
..t4.
September 7992
Kerry Messana
Betson Advance
Syracuse
New York
Closer
Look
EARLY WILLIAMS/UNITED SHUFFLE ALLEY
SURVNALKIT
This months column will cover
the older Williams and United
electronic shuffle alleys that uti-
lize System 3 through 6 logic
boards. I will cover both mechani-
cal and electronic aspects in two
parts. The electronic aspect will
be covered this month. Keep in
mind that most of this informa-
tion can be applied to older
pinballs.
ELECTRONICS
The electronics used in the early
shuffies is relatively dependable
but after all those years of service
will require some attention to
make keep it working right. If you
are familiar with the later Sys-
tern 9 and 11 boards then the
System 3 through 6 should be just
as familiar since the System 9-11
boards are for the most part
based on the early System boards
except the Cpu and Driver are
combined on one board.
The most common problems you
will run in to on the boards will be
intermittent in nature. This is
mostly due to connections being
poor. This will be broken down to
the different boards and the more
common problems you will run
into on them.
PttoiifiMs COMMON TO ALL BOARDS
Probably the biggest cause of
problems is the connectors on the
boards themselves. They will
''barrel" crack around the pins
and will cause all kinds of prob-
lems, mostly sporadic ones. The
cure for this is simple, resolder
them.
Do not just resolder them how-
ever, flow a little bit of fresh sol-
der on them and then evacuate
the solder from them. Then flow
fresh solder into the clean con-
nection and it will probably hold
up for another 5 to 10 years. If you
do not evacuate the old solder off
first you will be mixing whatever
dirt and corrosion that may be
there already into your connec-
tion and this will cause it to fail
again in a very short period of
time.
On boards that have larger ca-
pacitors, check to make sure
there are no barrel cracks around
their connections.
FUSES
Always check the fuses when you
have the game in for an overhaul.
Make sure they are good and
have a good solid connection in
their holder. Also check their
value and type. Always use the
value that is recommended.
,,-,,
One important note I want to
mention, I often find 25 amp
fuses where a 2.5 (2-1/2) amp fuse
should be. This is usually because
the fuse failed while in some dark
bar and you or your routeman
went out to correct the problem
but did not see that important
decimal point on the original
fuse. Hence, the 2.5 became 25
and if you shoulddevelop a short
in that line you are almost guar-
anteed a major repair to put it all
back together again!
POWER SUPPLY
The Power Supply/Regulator
board feeds all voltages to the
machine with the exception of
General Illumination. There is a
+100 and -100 volt section for
displays, +28 volts for solenoids,
+18 for Cpu controlled lamps, +5
volts for logic power and +5 volts
unregulated for Power-On Reset
circuits.
~
m
..t4.
September 7992
Kerry Messana
Betson Advance
Syracuse
New York
Closer
Look
EARLY WILLIAMS/UNITED SHUFFLE ALLEY
SURVNALKIT
This months column will cover
the older Williams and United
electronic shuffle alleys that uti-
lize System 3 through 6 logic
boards. I will cover both mechani-
cal and electronic aspects in two
parts. The electronic aspect will
be covered this month. Keep in
mind that most of this informa-
tion can be applied to older
pinballs.
ELECTRONICS
The electronics used in the early
shuffies is relatively dependable
but after all those years of service
will require some attention to
make keep it working right. If you
are familiar with the later Sys-
tern 9 and 11 boards then the
System 3 through 6 should be just
as familiar since the System 9-11
boards are for the most part
based on the early System boards
except the Cpu and Driver are
combined on one board.
The most common problems you
will run in to on the boards will be
intermittent in nature. This is
mostly due to connections being
poor. This will be broken down to
the different boards and the more
common problems you will run
into on them.
PttoiifiMs COMMON TO ALL BOARDS
Probably the biggest cause of
problems is the connectors on the
boards themselves. They will
''barrel" crack around the pins
and will cause all kinds of prob-
lems, mostly sporadic ones. The
cure for this is simple, resolder
them.
Do not just resolder them how-
ever, flow a little bit of fresh sol-
der on them and then evacuate
the solder from them. Then flow
fresh solder into the clean con-
nection and it will probably hold
up for another 5 to 10 years. If you
do not evacuate the old solder off
first you will be mixing whatever
dirt and corrosion that may be
there already into your connec-
tion and this will cause it to fail
again in a very short period of
time.
On boards that have larger ca-
pacitors, check to make sure
there are no barrel cracks around
their connections.
FUSES
Always check the fuses when you
have the game in for an overhaul.
Make sure they are good and
have a good solid connection in
their holder. Also check their
value and type. Always use the
value that is recommended.
,,-,,
One important note I want to
mention, I often find 25 amp
fuses where a 2.5 (2-1/2) amp fuse
should be. This is usually because
the fuse failed while in some dark
bar and you or your routeman
went out to correct the problem
but did not see that important
decimal point on the original
fuse. Hence, the 2.5 became 25
and if you shoulddevelop a short
in that line you are almost guar-
anteed a major repair to put it all
back together again!
POWER SUPPLY
The Power Supply/Regulator
board feeds all voltages to the
machine with the exception of
General Illumination. There is a
+100 and -100 volt section for
displays, +28 volts for solenoids,
+18 for Cpu controlled lamps, +5
volts for logic power and +5 volts
unregulated for Power-On Reset
circuits.
~
Future scanning projects are planned by the International Arcade Museum Library (IAML).