Backbox bridges, filter capacitors and fuses

BR1 makes the 18 V for CPU-controlled lamps and has a large filter capacitor. BR2 makes the 32 V for solenoids and needs no filter capacitor. Games with the 192x64 dot matrix (Maverick to Batman Forever) add BR3, a second capacitor and fuse F3 for the display; all other games lack them.

Systems

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

Related tips

• Three backbox bridges on 192x64 DMD games
• Power supply board versions and their +5 V filter capacitors
• Backbox bridge fuses (late games)
• Choosing replacement bridge rectifiers
• Won't boot, only some lamps on: bad capacitor joints on the power supply board
• Fit a 120 V plug, line fuse and MOV

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