On Williams pinball machines from System 3 through System 11, you will find one or two bridge rectifiers in the back of the backbox, under the power supply. They may seem harmless, but the issue is that when the old bridge rectifier fails, there is no fuse between the transformer and bridge.. and it is possible, and has been know to catch the game on fire.

The bridge rectifier and fuse are provided.. all you do is remove the old and install the new. Peace of mind in only 5 minutes.

Your bridge probably has the Fastons soldered to it, so new ones are included. You will have to clip off the wires and crimp them on. Be careful to do this one wire at a time, keeping track of which wires go where.

The part comes with thermal paste already spread on the bridge rectifier.