I just put new pop bumper skirts on my bally kick off EM machine and when I was playing I heard a funny sizzling after hitting the pop bumper. Pulled the playfield up and the spoon switch was in flames. Melted the tip of the skirt too. I adjusted the switch after replacing the skirts but maybe they we're too close? Anyone know why this would happen? Any help would be appreciated.

I didn't use contact cleaner but I did run some very fine sandpaper through the contacts. There's actually more to this story so here goes: when I got the game the fuse under the playfield was blown and the pop bumpers were wired to the flipper power. This game has a diode bridge under the playfield which converts the AC to DC to drive the pop bumpers. I properly wired the pop bumpers and replaced the fuse although the fuse was supposed to be a 5a and I put in a 5a slow blow... I'm gonna fix that. Anyway since then the game has actually ignited 2 of the spoon switches. What I'm thinking is that the diode bridge could be shorted(ive read that it's not uncommon). This will give the pops AC current and probably over power them. Also probably the reason the fuse was blown in the first place. I'm going to test this stuff and see. If anyone has similar experience please chime in. Thank you guys for the replies!

I think I want to replace the diode bridge even if it tests good. From what I see on the pin repair site they should be upgraded to a higher rating. What is the original one rated for? How high can the replacement one be rated and it still work? There seems to be a lot of 600v or even 1000v ones, would they be fine? What about amperage? Seems to me like it would work fine as long as the ratings are higher than orig but I'm not an expert.