Sound board versions are not interchangeable

520-5002-00: part of Laser War. 520-5002-02: Laser War to Back to the Future. 520-5002-03: Simpsons, Checkpoint, Ninja Turtles. 520-5050-01: Batman to Lethal Weapon 3. 520-5050-02: Star Wars, Rocky & Bullwinkle, Jurassic Park. 520-5050-03: Last Action Hero, Tales from the Crypt, Maverick. 520-5077-00: Tommy, WWF, Guns N' Roses, Frankenstein. 520-5126-02: Baywatch, Batman Forever.

Systems

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

Related tips

• Data East and Sega sound boards by game
• Check the sound board's regulated -5 V and +5 V
• No sound at all: check the -5 V regulator
• Loud hum from the speakers
• Sound board power input connector CN2
• No sound with all voltages present: the PALs
• No sound, only amplifier hiss with the volume up
• No sound though sound board voltages are fine: unreadable sound ROM

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