192 x 64 games: separate backbox supply for the display

The large-display games added their own backbox 18 V fuse (F3), bridge and capacitor feeding a switching supply on the display board, so a blown lamp matrix fuse (F2) no longer upsets the display.

Systems

• Data East/Sega CPU Version 3b

Games

• Batman Forever
• Baywatch
• Mary Shelley's Frankenstein
• Maverick

Related tips

• Setting up a replacement 192 x 64 display
• 192x64 display games have their own display supply fuse F3
• The 192 x 64 display makes its own high voltage
• Last resort for a flaky 192 x 64 display
• Large 192 x 64 display power connectors by display maker
• 192 x 64 display blanks out or the game resets
• Build your own 192 x 64 display power harness
• 192 x 64 display needs 120 ns or faster EPROMs

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