Hi;
I'm having a problem with my EBD left slingshot. It fires seeming randomly about 2-3 times/game. Actually, maybe not 100% random as it seemed like it may have been tied to the right flipper and maybe 3X bonus target. Regardless, it will not fire 100% of the time with either of these inputs, again maybe 2-3x per game total.

So far I have replaced what I thought was the capacitor on the slingshots with a 0.047 mfd ceramic disk. The reason I said "thought was" is because what I thought was the cap, sure looks like a diode or resistor. Per the picture below, I just disconnected one leg of it and then attached the new cap.

I also added fishpaper between the active switch leaf and the bracket, based off a tip from RGP. The problem remains, although (this might be my imagination) it seems a little better.

Note that this is the 1984 version of the game, not the original nor the LE.
http://www.ipdb.org/machine.cgi?id=5021

Any help would be appreciated.

DSCF1424.JPG

OK. The cap was added, so I'll ditch that and replace the diode.

I'll replace the diode, as if I just hook it back up, I think I'll end up right back were I was.

WOW, that was a long thread. I will have to order the EOS switches, which means it won't happen for a bit. I also noticed that there was no mention of replacing the switches, just adding a cap. I may try this, since I can just run to the rat shack and buy one.

I bought a few diodes, to I can give that a whirl as well.

Thanks for all the input so far.

I think it is fixed, or at least I haven't noticed it fire in about 20 games.

Replaced all the caps on the switches.
Replaced the diode on the slingshot.
Dressed up the EOS points.
Added a 0.01mfd 500v capacitor across the EOS. Per the schematic, this was used in Germany.

Thanks for the help and responses.

Spoke too soon. It started popping about once/game again.