Star Tech Journal

S*TJ JANUARY 1982 10
TAITO "QIX"
BY JOE CONNOR, ACTIVE AMUSEMENT, PHILADELPHIA, PA
A.C. IN - Shipped at 120 VAC/60HZ
A voltage programming block located on primary side of transformer for varied line voltages.
Interlock Switches
On/Off Switch
Service Outlet
No.
2
1
1
Located
Back door, coin door
Front of game; bottom left
Power transformer assembly
TRANSFORMER - Primary 120VAC located on
Secondary Winding Wire Color Approx. AC Voltage
Jl-1
Jl-2 Red
10.8
Jl-3
Jl-4 Yellow
15.3
Jl-5
Jl-6 Brown
15.6
Bracket
Green
6.3
Bracket
White
120
bottom of cabinet.
Function
Input for +5VDC bridge
Input for +12VDC bridge
Input for -voltage bridge
Cabinet Lamps
Isolated line voltage for monitor
FUSES - There are 8 fuses used; seven on power supply assembly, and one in the
bracket where the AC line cord enters the cabinet.
Protecting
Location
Value
Line in voltage
Line cord bracket
3A SB
Isolated line voltage for monitor
Pwr. sup. bracket
2A SB
Incandescent lighting
Pwr. sup. bracket
2.5 A
BRI (Bridge Rectifier)
Pwr. sup. P.C.B. (Fl)
15 A
BR2 (Bridge Rectifier)
Pwr. sup. P.C.B. (F2)
5 A SB
BR3 (Bridge Rectifier)
Pwr. sup. P.C.B. (F3)
2 A
+ 5 out Video Processor PCB
Pwr. sup. P.C.B. (F4)
4 A
+5 out Data Sound PCB
Pwr. sup. P.C.B. (F5)
4 A
POWER SUPPLY - Located on bottom of cabinet. Provides all necessary DC voltages.
Can Be
DC Voltage Measured At Adjustment Voltage-Reg. Function
Supply for Logic IC's
UA723
TrimPotR16
13-I
+ 5
Supply for Audio AMP
UA723
TrimPotR28
13-6
+12
& Display RAMs
1408 (DAC) on Data
None-Fixed
7912
-12
13-8
Sound PCB
Voltage for 4116 RAMs,
None-Fixed
79L05
13-4
- 5
also for TMS5200 and
LM324 (Data Sound PCB)
POWER SUPPLY COMMENTS:
The power supply is fairly similar to the multivoltage ones being used by most manufacturers.
It is not a switching power supply as was formerly used by Taito, which should be good news to
anyone attempting repairs. There are 4 voltage indicator LEDs which can be helpful, but as
always, the voltage should be checked with a meter even if the corresponding LED is on.
In addition to the +5 volt and+ 12 volt adjustment pots, there are also current fold back pots
(identified on power supply as +SI (Rl8) and+ 121 (R25). These pots are adjusted and sealed by