(Topic ID: 68310)

Bally 7-digit display - comma stuck ON - FIXED!

By midcoastsurf

10 years ago


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Topic Stats

  • 19 posts
  • 6 Pinsiders participating
  • Latest reply 10 years ago by MrBally
  • Topic is favorited by 4 Pinsiders

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#14 10 years ago

I had a very similar issue with my 7 digit display in a Skateball. Both commas would light when the scoring showed "00" before gameplay started. It ended up being a long process of troubleshooting, but in the end it was the zener diode VR1.

You may want to check the voltages on both sides of this diode - there should be about 100-110 volt difference. In my case, there was no difference in voltage - the zener was shorted. Replacing VR1 solved the problem.

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