Alphanumeric games need the 520-5000-00 supply

Laser War to The Simpsons need the +100 V that only the 520-5000-00 supply produces. None of the later 520-5047 supplies will run these displays.

Systems

• Data East CPU Version 1/2
• Data East CPU Version 3

Games

• Back to the Future
• Laser War
• Monday Night Football
• Phantom of the Opera
• Playboy 35th Anniversary
• Robocop
• Secret Service
• The Simpsons
• Time Machine
• Torpedo Alley

Related tips

• Adding jumper wires across DB1 and C4 (520-5047-00/-01/-02)
• CPU won't boot, 5V collapses under load: replaced bridge not joined on the top side
• Z1 on the power supply is a varistor, not a diac
• Power supply board versions and their +5 V filter capacitors
• Power supply CN1 pinout, pins 1-6
• Power supply CN1 pinout, pins 7-12
• Power supply gives no +5 V
• No or low +5 V from the power supply

Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part One, Clay Harrell (pinrepair.com)