The 192 x 64 display makes its own high voltage

Unlike the smaller displays, the 192 x 64 display receives only +5 V and a low supply of about 12 to 18 V, and builds its own high voltages on the display board. The main power supply sends it no high voltage.

Systems

• Data East/Sega CPU Version 3b

Games

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

Related tips

• Build your own 192 x 64 display power harness
• Setting up a replacement 192 x 64 display
• 192x64 display games have their own display supply fuse F3
• 192 x 64 games: separate backbox supply for the display
• 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
• 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)