Above is Magnet board taken out of the game. This magnet board is located under the playfield on the left side. It controls 3 magnets used in the game to fling the balls around by pulsing them repeatedly during multiballs and Super Seance mode.
Another angle. The board has 3 powerful transistors controlling the magnets. They get hot during the game, so they are mounted on heatsinks. These are TIP36C transistors, available online or in any electronics store. NTE replacement part# is "NTE393".
The problems occur with the design flaw of the game. If one of the transistors shorts internally, that magnet will be locked on as long and the game is powered on. properly the magnets only pulse on and off and then shut down when the mode is over or 2 balls are no longer in play. The result is magnets getting extremely hot. Since they are mounted under the playfield made of wood, if left unchecked the result will be damaged playfield. Usualy, that is demonstrated in playfield discoloration, mild burn marks or "browning" and yellowing of the artwork...
This particular board had its resistor get real hot and burn through the board damaging components and traces. It will need to be replaced and jumpered. Nothing could be done about the hole in the board. It'll look ugly, but it'll be fully functional.
Board mounted in its place under the playfield.
Other side of the board showing the damage already done.
it is very important NOT to overfuse the electronics circuitry running the game. The fuse used in conjunction with this board is 250 Volt (do not use 32 Volt fuses!), 5 Amp, slow blow (they are also called MDL) fuse. The other kind is a fast-blow fuse, often called AG or AGC. We'll use the slow-blow here. This is a cheap and easy part to replace...
To be continued...
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