(Topic ID: 291141)

Bally 6 Digit Display Segment Bleed

By Skidave

3 years ago



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  • 6 posts
  • 5 Pinsiders participating
  • Latest reply 3 years ago by Quench
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    #1 3 years ago

    I repaired a bunch of Bally displays today with all sorts of issues. I blew through my stock of new parts and I have one more issue to conquer.

    I have segment bleed on two segments in a 6 digit display. Each digit has the same bleed. I'm thinking decoder chip, but could also be the segment transistors. I have not checked all the resistors for the segments.

    I know this was discussed here before, but I couldn't find it via the search.

    I grabbed a pic which shows what I'm talking about in one of the segments.

    20210401_200432 (resized).jpg20210401_200432 (resized).jpg
    #2 3 years ago

    I believe this is an internal failure in the glass.

    #3 3 years ago

    Yep. It’s the glass

    #4 3 years ago

    Is that segment ghosting on every digit? We can only see two off ones which i think is what you are pointing at. If so check/replace the segment driver transistor and maybe the 4543

    not exactly your symptom but I think this one goes overlooked.
    Untitled (resized).pngUntitled (resized).png

    #5 3 years ago

    Yes, it is every digit in the same 2 sections. It's hard to get the digits lined with correct numbers. It was hard to capture.

    It's not the glass.

    I'm almost out of parts (in my possession) so I was not planning to shot gun. My gut is 4543.

    Just running it past here for another opinion.

    #6 3 years ago
    Quoted from Skidave:

    It's not the glass.

    Did you swap the glass with another display and the fault followed the board?

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