(Topic ID: 177089)

1979 Supersonic- Fuse advice


By LawlorFanatic

3 years ago



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  • 2 posts
  • 2 Pinsiders participating
  • Latest reply 3 years ago by drscottsmith
  • Topic is favorited by 1 Pinsider

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#1 3 years ago

I have a 1979 Supersonic in great condition. The game powers up fine, but blows a fuse (#f4, 5v) when I hold the right flipper in for longer than a few seconds. I checked the manual to make sure I had the proper fuse inserted, I did, but would anyone recommend where to begin in solving the problem? I've read that poor-dirty soldering can result in shorts, but any advice on troubleshooting would be greatly appreciated! Thank you! -Alex

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#2 3 years ago

Last time I dealt with the same issue on an early Bally SS, the EOS switch on that flipper was not being fully opened by the cam on the flipper assembly - the high side of the coil was staying energized instead of switching over to the low side for holding. In this case it was made worse by the fact that the flippers were so worn that the switch would open and then kind of bounce partially closed because of the slop in the mechanism.

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