Entering Easy A-Just diagnostics and audits

Steps

• Inside the coin door are a black momentary button and a green latching (up/down) button.
• For diagnostics, set the green button down, then press the black button from attract mode.
• For adjustments and audits, set the green button up, then press the black button.
• The black button steps through the items; the green button position sets the direction.
• Press the start button to change a value, then the black button to accept it.
• To leave, hold the black button so it scrolls to the end; the game then reboots.

Systems

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

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