Data East boards follow the Williams System 11 design
The 1987-1995 Data East and Sega electronics were modelled closely on Williams System 11, so System 11 repair knowledge, test methods and many parts carry over directly when fixing these games.
Systems
Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part One, Clay Harrell (pinrepair.com)