Star Tech Journal

STAR*TECH Journal
Saptembe r 1987
[ 4)
Atari GAUNTLET Audio Amp
Sub Mod
By
Sam Cross
Godwin Distributing Co.
Nerth Little Rock, Arkansas
ProBLEM: TDl\2030 audio amp blows on the
audio anp/power supply board blowing the
AC supply fuses.
SOLlJI'IOO: Either replace the TDl\2030 or
roodify the surrounding components to
adapt the circuit to use a TDl\2002.
INFORMATIOO: '!he 'IDA.2030 operates from a
split p:>wer supply of +15 and -15 voe, 30
VOC total, and the TDl\2002, the more
corrm:>nly used amplifier chip which looks
package-wise just like the TDl\2030,
operates from only positive voltage and
ground, and the maximl.Dll safe supply
voltage is around +15 voe.
l-kxlifying the original factory circuit to
use the single supply voltage TDl\2002
involves eliminating the negative supply
voltage to the TDr\2002 and substituting
g 7 oun~ potential and substituting sorre
circuit COJllX)nents to allow for its single
supply type operation.
Using a progressive substitution approach,
I changed one component at a time to see
it~ effect on the TDr\2002. About the only
thing you really need to do to substitute
one for the other is to eliminate the
negative supply voltage so as not to
overvoltage the TDr\2002, but these extra
steps past STEP WMBER OOE are up to
you ...
1. cut the trace to pin 3, the
middle""100st leg of the TDl\2002, or s~ly
lift it up and insulate it from the
original negative supply, and connect it
to ground, i.e., the center leg of the
transformer windings supplying the +15,
-15 voe power.
capacitator oriented with its+ side
facing pin 4 of the TDr\2002.
•
4. You might, as a precaution against
distortion, reduce the value of the input
capacitance to that particular amp.
Bally Midway Anti-Cheat
Devices
By Bally Midway Field Service Dept.
Franklin Park, Illinois
A090-00087-0000
A090-00064-0000
0017-00005-0003
0017-00005-0214
0017-00005-0211
A090-00061-0000
A090-00061-0100
0017-00005-0203
(Rev. D)
M051-00127-A003
A090-00113-0000
A090-00114-0000
M051-00127-A004
M051-00127-A005
A090-00601-0000
2. Renove CR9 and CRl0 if Ql was bad, or
CR7 and CR8 if Q2 was bad.
M051-00086-A007
3. cut the trace after the lOK feedback
resistor, RB if Ql or R9 if Q2 and insert
in series a 470 microfarad at 16 voc
A090-00607-0000
Coin Chute with Pin
Anti-Penny Device
Metal Acceptor with
String CUtter(Coin
Mech)
Metal Acceptor with
String cutter (Coin
A
Acceptors Inc.)
W
Plastic Acceptor with
Anti-String Device
(Coin Acceptors Inc.)
Anti-String Device
Anti-String Device-Mini
Anti-Wire Coin switch
Guide
Anti-Wire Cheat Clip
Anti-Wire Cheat Barrier
Anti-Penny Coin switch
Wire Adjustrrent
Procedure
Anti-Static Insulator
Installation
Anti-Static Insulator
Kit
.800" Token Kit
. 800" Token SWi tch
Installation
Anti-Wire Cheat Shield
Installation Procedure
Anti-Wire Cheat Shield
~it
Aladdins castle Token
and 8 Sided Token
-
switch Installation
Aladdins castle Token
and 8 Sided Token
switch Kit