Laser War and Secret Service use a different backbox layout

Only the first two games copy the Williams System 11A layout: power supply at the upper right with a separate 50 V coil board below it and no PPB. All later games put the power supply at the upper left and use the PPB playfield power board.

Systems

• Data East CPU Version 1/2

Games

• Laser War
• Secret Service

Related tips

• SMIG relay boards on Laser War and Secret Service
• Laser War can have a version 1 or version 2 CPU
• Flipper circuit on Laser War to Time Machine
• Fusing the special coils on Laser War to Playboy
• Laser War: CPU and display EPROM types and latest versions
• Secret Service: CPU and display EPROM types and latest versions

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