Some time ago I heard about the 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. 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 my brand new Bridge Board.
On this new board are the bridge rectifiers, capacitor replacements and the newly added fuses. These components can continue to serve you for another 10 to 15 years and replacements are easily available. Simple screw connections, no soldering skills needed. The bridge rectifiers are on the back side of the board and are also used for mounting the board in the back box. This way the bridge rectifiers have the best cooling thru the metal back plate in the back box of the machine. If you want you can also mount the bridge rectifiers on the front of the board, but an extra cooling body is advised and the use of mounting spacers. Additionally this new board also has 2 leds for checking if the exit power is present.
You can use this board in ALL games from Williams System 3 up to System 11A. Data East used a lot of technology from Williams. So you can also use this new Bridge Board for Data East games as well. Even the first 4 games from Sega too.
I do have to mention that Williams solved this fuse problem from System 11B. From this series Williams used an Aux. Power board which has the fuses added. Data East solved this missing fuse problem from their 3rd game (Time Machine).
Despite of the solved problem in Data East games, you can still use the new Bridge Board to replace the large expensive capacitor. The big advantage is that you also replace the old bridge rectifiers and the fuse holders all with one new board.
The price for this Bridge Board would be 30 euro ($41) plus shipping. Shipping to countries within the EU would be 15 euro ($20). Shipping to the USA would be 25 euro ($35). Combined shipping is advised to keep the shipping costs low. If you have any questions about this board or its connections, please send e-mail me at inkochnito @ kpnplanet . nl or inkochnito @ gmail . com.