Star Tech Journal

5
STAR*TECH JOURNAL/NOVEMBER 1983
BALLY MIDWAY
SERVICE BULLETIN: DISCS OF TRON WIRING ERROR
GAME: Discs of Tron (Environmental cabinet
produced before Sept 9, 1983)
SUBJECT: Fluorescent light assembly- 6-volt
transformer.
CONDITION: Overheating condition caused by a
wiring error.
REMEDY: Refer to Figure# 1 for proper wire
sequence and light location.
NOTE: Only a small percentage of games have the
wiring error. When a strong odor is detected,
this would indicate a wiring problem.
FIGURE #1
DISCS OF TRON (ENVIRON)
FLUOR. LIGHT WIRING DIAGRAM
See the DIAGRAMS below for the appropriate
WIRING SEQUENCE for each FLUOR. LIGHT
as indicated.
WHITE -TO TRANSFORMER
BLACK - TO BALLAST
BLUE/ORANGE - TO PIN
ORANGE - TO TRANSFORMER
BLACK- TO TRANSFORMER
GREEN -TO PIN #4
YELLOW - TO TRANSFORMER
GREEN - TO PIN #5
PIN# 2 - GROUND
WIRE DIAGRAM "A"
OPEN
BLACK-TO PIN #1
ORANGE- TO PIN #3
GREEN - TO PIN #5
BLUE/
ORANGE- TO PIN #7
OPEN
PIN #6 - GROUND
WHITE-TO PIN #2
GREEN - TO PIN #4
WIRE DIAGRAM "B"
A GLOSSARY OF MICROPROCESSOR TERMS
MICROPROCESSOR - one of several micro-circuits that perform the
function of a computer's CPU. Sections of the circuit have arithmetic and
comparative functions that perform computations and executive instructions.
ROM - read-only memory. The program, or binary on-off bit pattern, is set
into ROM during manufacture, usually as part of the last metal layer put
onto the chip. Nonerasable. Typical RO Ms contain up to 16,000 bits of data
to serve as the microprocessor's basic instructions.
CPU - central-processing unit. A computing system's "brain", whose
arithmetic, control and logic elements direct functions and perform compu-
tations. The microprocessor section of a microcomputer is on one chip or
several chips.
RAM - random-access memory. Stores binary bits as electrical charges in
transistor memory cells. Can be read or modified through the CPU. Stores
input instructions and results. Erased when power is turned off.
PROM - programmable read-only memory. User permanently sets binary
on-off bits in each cell by selectively fusing or not fusing electrical links.
Non-erasable. Used for low-volume applications.
LSI - large scale integration. Formation of hundreds of thousands of so-
called gate circuits on semiconductor chips. Very large scale integration
(VLS) involves microcircuits with the greatest component density.
EPROM- erasable, programmable, read-only memory. Can be erased by
ultraviolet light bath, then reprogrammed. Frequently used during design
and development to get programs debugged, then replaced by ROM for mass
production.
MOS - metal-oxide semiconductor. A layered construction technique for
integrated circuits that achieves high component densities. Variations in
MOS chip structures create circuits with speed and low-power requirements,
or other advantages (static will damage an MOS chip).