Star Tech Journal
Issue: 1995-December - Vol 17 Issue 10 - Page 16
STAR*TEcH
Journal
December 1995
WILLIAMS
STAR*TECH Journal
TWILIGHT ZoNE PIN
Your Source For:
v" Monthly Tech Journals
v" Service Manuals
v" Video Pattern
Generator
v" STJ on CD-ROM
v" Indexing, Database and
Tracking Software
v" Coin-Op Mail List Rental
v" Industry Bulletin Board
v" Back Issues from 1979
Order Prepaid or COD.
Phone:
609/654-5544
Fax:
609/654-1441
Bbs:
610/251-9387
Email: startech@cyberenet.net
ULTIMATE CLOCK Fix
Jonathan Deitch
Games Technician
Atlanta, Georgia
PROBLEMS
CHECK PINOUTS
The hands were not aligned
properly causing the game to
declare it bad every so often. One
of the =#=86 bulbs were burned
out, and it was noisy.
Also, the pins that go between the
two board have a tendency to
tarnish after getting cooked for a
while in the heat ... this will cause
connectivity troubles between
the mintutes and hours optos
boards. Cleaning the pins ( using
either steel wool, pencil eraser or
a razor blade) will restore the cir-
cuit. This problem can cause
symptoms similar to bad optos.
If you keep replacing optos and
SYMPTOMS
Even the =#=86 bulbs produce too
much heat. There were discolora-
tion marks on the PCB fiberglass
by the bulbs. Not quite scorch
marks, but still serious discolora-
tion.
THE VENrING FIX
AMERICA'S
DREAM TEAM
One of America's fastest
growing entertainment cen-
ters is seeking mechani-
cally inclined, dynamic and
results oriented Managers
for its stores throughout the
U.S. Excel. advancement
opports. Exper. in amuse-
ment industry is a must. Fax
or send your resume to: Hu-
man Resources Director,
Fernandez Entertainment,
91-246 Oihana St., Kapolei,
HI 96707 . Fax: 808/682-
4271. EOE.
The fix of drilling holes above the
PCB's (as reported in a previous
issue of S'JJJ plus the following
clarification:
• The holes above must be in two
places - above the hours opto
board (ie: the gearbox section) for
ventilation for the hours optos
• And over the minutes opto
board, but between the board
and the clock facing -otherwise
the heat from the light bulbs can-
not escape.
• Also drill inlet vents on the
clock sides at the very bottom to
allow for cool air to vent in, then
out the top.
"Originally, the
lamps in the Twilight
Zone clock were
controlled lamps ... ,,
they go bad again or act intermit-
tently bad, this might be the
problem.
ADDING DIODES
Lastly, D1-D4 on the minutes
opto board have zero ohm jump-
ers installed. Wms did this appar-
ently when the clock lamps went
from controlled lamps (which
require diodes) to GI lamps
(which don't). Installing 1N4001
diodes here (Radio Shack has
them for 25 cents each) or even
1 N 4004 if they're on hand, (like
Journal
December 1995
WILLIAMS
STAR*TECH Journal
TWILIGHT ZoNE PIN
Your Source For:
v" Monthly Tech Journals
v" Service Manuals
v" Video Pattern
Generator
v" STJ on CD-ROM
v" Indexing, Database and
Tracking Software
v" Coin-Op Mail List Rental
v" Industry Bulletin Board
v" Back Issues from 1979
Order Prepaid or COD.
Phone:
609/654-5544
Fax:
609/654-1441
Bbs:
610/251-9387
Email: startech@cyberenet.net
ULTIMATE CLOCK Fix
Jonathan Deitch
Games Technician
Atlanta, Georgia
PROBLEMS
CHECK PINOUTS
The hands were not aligned
properly causing the game to
declare it bad every so often. One
of the =#=86 bulbs were burned
out, and it was noisy.
Also, the pins that go between the
two board have a tendency to
tarnish after getting cooked for a
while in the heat ... this will cause
connectivity troubles between
the mintutes and hours optos
boards. Cleaning the pins ( using
either steel wool, pencil eraser or
a razor blade) will restore the cir-
cuit. This problem can cause
symptoms similar to bad optos.
If you keep replacing optos and
SYMPTOMS
Even the =#=86 bulbs produce too
much heat. There were discolora-
tion marks on the PCB fiberglass
by the bulbs. Not quite scorch
marks, but still serious discolora-
tion.
THE VENrING FIX
AMERICA'S
DREAM TEAM
One of America's fastest
growing entertainment cen-
ters is seeking mechani-
cally inclined, dynamic and
results oriented Managers
for its stores throughout the
U.S. Excel. advancement
opports. Exper. in amuse-
ment industry is a must. Fax
or send your resume to: Hu-
man Resources Director,
Fernandez Entertainment,
91-246 Oihana St., Kapolei,
HI 96707 . Fax: 808/682-
4271. EOE.
The fix of drilling holes above the
PCB's (as reported in a previous
issue of S'JJJ plus the following
clarification:
• The holes above must be in two
places - above the hours opto
board (ie: the gearbox section) for
ventilation for the hours optos
• And over the minutes opto
board, but between the board
and the clock facing -otherwise
the heat from the light bulbs can-
not escape.
• Also drill inlet vents on the
clock sides at the very bottom to
allow for cool air to vent in, then
out the top.
"Originally, the
lamps in the Twilight
Zone clock were
controlled lamps ... ,,
they go bad again or act intermit-
tently bad, this might be the
problem.
ADDING DIODES
Lastly, D1-D4 on the minutes
opto board have zero ohm jump-
ers installed. Wms did this appar-
ently when the clock lamps went
from controlled lamps (which
require diodes) to GI lamps
(which don't). Installing 1N4001
diodes here (Radio Shack has
them for 25 cents each) or even
1 N 4004 if they're on hand, (like
Future scanning projects are planned by the International Arcade Museum Library (IAML).