Alphanumeric supply: parts for the -100 V side
TR4 MJE350 (or MJE15031, or a 2N5416 with a star heat sink); TR2 2N5551; D8 1N5228 or 1N4730A; D7 1N4004; D10 1N4764 or 1N4763A; R9 39k 1-2 W flameproof; R13 680 ohm 1/2 W; R10 330k 1/2 W; C12 0.1 µF 500 V (250 V works) metal polyester.
The display power supply carries about 100 V or more; work on it with the game unplugged and let the capacitors discharge.
Systems
Related tips
- Check the ±100 V display supply at CN5
- High-voltage display fuse F3 keeps blowing
- Set an aftermarket "B" display supply for alphanumeric games
- Run alphanumeric displays at 91 V for longer life
- Alphanumeric games need the 520-5000-00 supply
- Displays weak with low 100 V even unplugged
- Alphanumeric displays dim or dead
- Alphanumeric displays show only a few digits at a time
Source: Repairing DataEast 1987 (Laser War) to Sega 1995 (Batman Forever), Part Three, Clay Harrell (pinrepair.com)