Inkochnito's Rectifier/Bridge Board - Williams System 3-11A / DATA EAST / SEGA

There is a design problem in a large number of Williams games.
The problem is about missing the fuses in the 18V (controlled lamps) and 34V (solenoids) circuits before the bridge rectifiers. Because of the missing fuses things can go very wrong with these games.
When a short occurs in a bridge rectifier there is a possibility of burning wires from the transformer to the bridge rectifiers. In worst case scenario even the transformer goes up in smoke. In the best case the main fuse blows and turns the machine off. Look at the bottom of the page for a few examples of how things can go wrong.

To remedy this problem simply placing fuses in the circuit before the bridge rectifiers is advised. A very doable solution. Another problem could be the very large capacitor in the 18V circuit. The life expectancy of 10 to 15 years is already long past for all machines. Now isn’t that much of a problem for the controlled lamps, but the electronics might object.
When your controlled lamps burn less bright there might also be a problem with the bridge rectifier.

All these problems can be fixed by using the brand new Inkochnito Bridge Board:



Available from stock @ PinballShop.nl:
www.pinballshop.nl/electronics-parts/boards/inkochnitos-rectifier-bridge-board/?sl=en