Just picked up a Fathom, Game plays but restarts randomly. I will replace board caps, but found this while making sure the ground was sound.

IMG_2074 (resized).JPG

I am also curious what roll that cap plays in the circuit there. It looks like the positive an negative are both connected to the filter. Just not sure how this filter works.

just found this, Probably what I need. Though this is referring to WPC

The MOV (metal oxide varistor) is designed to have high resistance. But when its rated voltage is exceeded, it internally shorts. This immediately blows the line fuse and halts the power to the game, saving everything but the line fuse and the MOV itself. Smaller voltage surges are absorbed by the MOV without total destruction (though lots of small surges can eventually destroy a MOV and make it short).

The MOV is located inside the cabinet's metal power box, next to the coin box. If you need to replace it, here are the values needed:
North America (115 volt power): 150 volt or 130 volt MOV.
Europe (220/240 volt power): 275 volt MOV.

The rating is the voltage at which the MOV will short. Lower voltage ratings will provide more protection. But remember the power supply circuits have other protections from high input voltages too. So don't select a voltage too low, or you'll be replacing the MOV often from small voltage surges. Radio Shack sell MOV's that work well in WPC games.

wpcmov2 (resized).jpg

Thanks!
When Can I order some parts from you?

I cut the part out while I wait for a new one.