Star Tech Journal

STAR*TECH Journal
February 1988 (3)
Bally Midway JtllPSIDr Option Sllfitcbes
By Greg McKay, Field Service Rep
Mt. Holly, NJ
Bally Midway Mfg. CO.
Franklin Park, IL
Errors have been detected in the switch
settings for JUMPSOOT. Please disregard
the option switch setting information
(M051-00E18-A007} located on Page 5 of
your JUMPSHOI' field conversion kit
instruction manual.
Refer instead to the option switch setting
information (M051-00E18-B007) that
follows.
Transfer this information to your JUMPSHOI'
field conversion kit manual for future
reference.
JUMPSHOI'
OPl'ION s-ITTOI SErrit,;l;S
GAME '.J!IME
2 mins total game tine
4 mins total game time
2 mins total game tine
&Wll
&Wi2
on
off
on
*off
on
on
off
off
el.AYER SEIOCTIOB
Player 1 Black
White
Player 2 Black
White
&WIJ &Wl4
on
*off
on
*off
MEil'llD QF PIAY
&Wi5
Free Play
R>rmal Play
on
*off
3 mins total game time
1 Player Per 1 Credit
1 or 2 Players Per 1 Credit
Gottlieb SOUnd-Speecb Board Audio 1IIP5
By Dennis Brennan
SYMPIOM: No sound, IJ.1379 Audio Amp Smoked!
'!he IJ.1379 Audio Anp used on Gottlieb
sound- Speech Boards, requires an Amp
voltage of 30 volts DC for proper
operation.
If this voltage is bad or missing, the
Audio Anp will fail and will often bum
up.
Gottlieb pinball games use a separate
sound-speech power supply board, while
Gottlieb video games such as (rBERT or WJ)
PIANETS use one main power supply for all
voltages.
When replacing sound boards, always check
for the proper anp voltage or the new
sound board may be damaged also.
sone ganes used TDA2002 Anps, which are
:rrounted on a small green piggyback board
in location U23. '!he TDA2002 Anp uses +18
volts OC for the anp voltage.
When ordering replacenent Gottlieb sound
boards and power supplies f ran your
distributor, make sure you order the 30
volt power supply for sound boards with
IM379 anps and the 18 volt power supply
for sound boards using the TDA2002
piggyback boards.
&Wi6
on
*off
SJ>ECIAL ftna!QNS
swt7 &Wi8
Freeze Video (:rronitor
presentation stops moving)
on
Game Operates Normally
*off
The power supplies are identical except
for the values of Rl and CRl:
The 30 volt power supply uses a 430 ohn
(1/2 watt) resistor (Rl) and a 1N4751A (1
watt) zener diode (CRl).
'!he 18 volt power supply uses a I.SK ohn
(1/2 watt) for Rl and a 1N4746A (1 watt)
zener diode for CRl.
* indicates factory recomnended settings
lllrply's law 1709
An easily understood, workable falsehood
is more useful than a canplex
incomprehensible truth.