I'm looking for some guidance of what to look for - I rebuilt 3 working flippers on my Whirlwind. The Right ones turned out fine, initially, but the left one was quite weak. I thought perhaps I had the wiring wrong as regards the power wires to the ends, tried reversing those. That didn't work at all; flipper was dead. Tried re-reversing them; flipper still dead and R sided flippers working but acting weaker and chattering some since then.

I checked Ohm resistance on the 3 lugs and the meter goes from infinity to zero when I make contact between either outside lug and the middle, or between the two outside lugs. I think this is good , that the coil wires haven't lost contact with the lugs (with all the soldering I did), but am not sure.

Additionally, does polarity matter as regards the two power wires which are hooked up to the outside two lugs? What happens if they are reversed? Could I have blown a fuse if the R sided flippers are still working some?

Thanks.

Ranhorton. That would be great, would like to see what your wiring looks like to L flipper. I did replace the EOS switches and caps.

I'm going to check the fuses later. Anybody know which one it would be? Thx

thank you all very much - great bunch of people here to offer this much help. will see if I can get this fixed within the next few days.

I'm not sure what has gone wrong. Fuse seems to be ok when I test it (plus R sided flippers work). R sided flippers are working, but weak. Eject coil for the cellar has gotten weak. L flipper is not working at all. I've tried hooking it up with the power wires one way and reversed it to the other way (both on the outside lugs). Also have used alligator clips to make connect the wires to the 3 terminals to make sure that contact is being made in case I had a cold solder joint there. No luck.

These were all new parts - new coil, new capacitor and leaf switch, etc. I've attached a photo of my alligator clip test setup, which didn't work. Any ideas? Could I have blown a transistor or something?

IMG_2146.jpg

the way it is in the above photo is the opposite of Ranhorn's photo #2, but it didn't work for me that way either. Just dead now.

I don't have any experience checking voltages to coils with the machine on and the playfield raised. Is that something that I need to do? Anybody that could walk me through that one?

I'm only getting 38.3 volts at all 3 coils. All 3 coils are weak, especially the L one, which barely moves. I bought a new coil, by the way, in case I had vaporized one of the wires or it was making poor contact.

Is 38 volts actual vs. 50 volts required the problem? Why would that be happening and what do I have to do about it?

Thanks