A while back I had a problem with two of my Flight 2000 displays not working. I had 175 volts but the two displays were dark. Someone advised that the glass needed to be replaced. I just moved those displays to players 3 and 4 and the game works fine. Just can’t have 3 or 4 players.

I’m in the process of replacing the connectors and headers on the working displays when I thought I’d try to check the bad displays again. I cranked up the voltage to 185 volts and the two displays sort of work. One shows a glow in the bottom (looks like a dot) and the other is trying to show numbers.

Do you think these are salvageable?

Thanks

Bob

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Which transistor would be causing the segments to be dim or not fully lit?

Thanks

Bob

Thanks Xenon,

My plan was to replace the header pins and 100K resistors on all the displays. (parts on order).

Would bad transistors cause the segments to just partially light? Or light dimly?

Bob

Well, that didn't work so well. I replaced the header pins, connectors, 7 100K resistors, all 21 transistors, and the decoder chip. I even re-flowed the glass display connectors. At 190 volts I got basically the same results - first 3 digits are still dark or dim.

Anyone care to guess what is going on here? What can I do next.

Thanks

Bob

Would that be CR1 ? I can check it tonight.

Thanks

Bob

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At 185 volts I have no digits showing - and 68.5 volts at R45

At 190 volts I have 2 digits showing - and 69.8 Volts at R45

At 195 volts I have 6 digits showing. (one digit out)

I read on PinWiki " If there is any light at all on the display, then it is probably repairable. Some type of Bally display glasses will have some light on them, besides the digits. If there is light anywhere on the display, then the glass is most likely OK and your problems are elsewhere."

However, I think Barakandl might be right that the glass is GOING bad. I hate to run it over 180 - 185 volts just for this one display.

Any other thoughts?

Thanks

Bob

That's what I think It's doing. The higher the voltage be more digits show. Replacements are a little hard to find and get expensive. I guess I'll just stick in in Player 4 and work on player 3 display. Maybe I'll have better luck there.

Thanks for the help and suggestions.

Bob