(Topic ID: 228586)

Bally Supersonic Blowing F2 at Startup

By GuiitarMan

5 years ago


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  • 11 posts
  • 6 Pinsiders participating
  • Latest reply 5 years ago by BigAl56
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#1 5 years ago

I brought home a Bally Supersonic, my first pin, a few weeks back that would boot, but not flip or have any display. I have gotten everything working except for the displays so far. All displays have been dead since I received the game. I am a total novice at electronics, but am learning a lot as I go. I checked the test points on the display boards and I am getting correct measurements on TP1, but not getting any high voltage at all on the other TP. I checked fuse F2 and it was the only one blown so of course I replaced F2, booted her up, and in a magnificent, bright green flash I quickly blew the new F2.

The only thing I can tell visually (a novice eye of course) is that I have some corrosion on the BR3 rectifier board. (Pictures included) Would this be the probable cause of F2 blowing? What would be the best solution for a complete novice (replacing the board, sending it out for repair, etc)?

Thank you for your time and any suggestions/solutions you may have!

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#3 5 years ago
Quoted from Astill:

one of the diodes on the left of the rectifier board is most likely shorted. they are the small black things. there are four of them. put a meter on continuity and test each one. if you get continuity it is shorted.

I get continuity only on CR1. It has a little corrosion around it as well (as do many of the other solder points on the board).

What is my best course of action knowing I've never done board repair before?
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#9 5 years ago

Thanks for the help! I'm ordering some diodes today and will see what I can do. I haven't done any board work at all before so I think I will start by trying Mr.Bally's method before trying to pull the board out completely. I'll update once I can get it installed.

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