Large 192 x 64 display power connectors by display maker

Dale: input P3 pin 1 +5 V, pins 2 and 3 ground, pin 4 the low supply (marked 24 V but fed about 16 to 18 V from backbox bridge BR1 or BR3); its on-board supply makes about +80 V (P1 pin 8), -90 V (pin 2) and -100 V (pin 1), with pins 4 and 5 ground. Babcock: no P3; P1 pin 1 +12 V, pins 2 and 3 ground. Cherry: no P3; P2 pins 1 and 2 +12 V, pins 4 and 5 ground, pin 6 +5 V. Babcock and Cherry boards make the +80, -90 and -100 V themselves.

The display power supply carries about 100 V or more; work on it with the game unplugged and let the capacitors discharge.

Systems

• Data East/Sega CPU Version 3b

Games

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

Related tips

• 192 x 64 display blanks out or the game resets
• Build your own 192 x 64 display power harness
• Large display still unstable after the harness fix
• Large 192 x 64 DMD power supply CN5 pinout
• Running the large display on the bench
• Setting up a replacement 192 x 64 display
• The 192 x 64 display makes its own high voltage
• 192 x 64 games: separate backbox supply for the display

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