Star Tech Journal

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A table of contents from our past
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MARCH '81
Midway "Galaxian" Substitute +5v Regulator •
Atari "Battlezone" Control Handle Mod • Gottlieb
New System 80 Service Manual • Midway "Pac-
Man" Ram/Rom Location Code • Atari "Missile
Command" Power Interrupt Mod • Atari "Battle-
zone" Random Score Problem • Gottlieb Auxiliary
Lamp Driver Board • Microprocessor Trouble-
T shooting (Part 3) • Midway "Pac-Man" Degree of
Difficulty Mod• Atari "Battlezone" Aux PCB Mod•
Stem "Berzerk" Service Notes • Cinematronics
"Star Castle" V3 Roms • Atari "Asteroids" Switch
Maintenance • Rowe/AMI Turntable Maintenance
Tips
APRIL '81
Midway "Rally-X" Test Mode • "Big Computer" in
one chip • Seeburg "SMC 1," "SMC 2" Potential
SPKR Damage• Williams General Illumination Mod
• Midway"Rally-X" Monitor Fuse Rating• Midway
"Pac-Man" Cocktail Table Static PCB • Early
Warning (Field Maintenance Tips) • Rowe/AMI
Number Conversions• Exidy "SPECTAR" Program
Update Mod (11 A-1 to 11 A-2) • Williams C8363
Master Display Board Troubleshooting Procedures
• HVL Circuits-Atari "Missile Command" Color
Monitors
MAY '81
Williams Service Notes • Midway "Rally-X" Static
PCB • Centuri "Phoenix" Options • Exidy Color
Board Ribbon Cables • Updating Older Rowe/AMI
Phonos to Contemporary Prices • Midway "Pac-
Man" Joystick Modification • Signature Analysis
(Part 1) • Atari "Missile Command" Diagnostic
Tests• Rowe Bill Changer Modifications• Gottlieb
Coil Chart
JUNE '81
"Repair of Rock-Ola Dollar Bill Programmers" •
Midway "Galaxian", "Pac-Man" Substitute +5VDC
Power Transistor• Centuri "Phoenix" Modifications
• Midway "Gorf' Program Change• Early Warning
#2 (Field Maintenance Tips) • Signature Analysis
(Part 2) • Stern "Berzerk" Credit Accumulation
Checklist • Stern "Berzerk" Joystick Mod Kit •
Suggested Game Improvements • Color to B&W
Converter CKT • Texas Instruments Power Semi-
conductor Catalogs
JULY '81
Atari "Asteroids Deluxe" Program Change Kit •
Stern "Berzerk" Joystick Adjustment • Rowe 44 7
Product Price Upgrading • Stern "Scramble" Power
Supply Modification • Gremlin "Astro Blaster''
Audio Modification • Wiring Diagram for Wico
Manual/Remote Volume Control • Gottlieb Reset
Modification • Taito "Crazy Climber'' Joysticks •
Signature Analysis (Part 3) Williams "Defender''
System Summary• Midway "Pac-Man", "Rally-X"
& Gort Anti-Static Cleaner Application • Williams
"Black Knight" Service Notes• Loss of All Coils on
Bally Pins • Atari "Asteroids" Troubleshooting Tips T
• Stern Joystick PCB Troubleshooting Tips
---------------------~~~~--------------------
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CENTURI
"PHOENIX"
UPRIGHT
MODIFICATION
Modification for C.P.U. Board
When Using - G07 - Electrohome
Symptom:
Touchy horizontal hold, screen dis-
torted in upper right hand corner,
second player score digits will not
straighten up.
Fix: Make changes on C.P.U. board
as per steps 1 & 2 below.
1. Cut trace on pin #5 on IC-22.
Connect jumper to pin 5, other
end to+s volts.
2 1 Cut trace to pin #12 on IC-
23. Connect jumper to pin 12,
other end to pin #11 on IC-19.
AUGUST 1 9 8 1 ' ~
15