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(Topic ID: 169893)

Gottlieb display missing single digit

By Archieball

7 years ago


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#10 4 years ago
 
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AlonzoMoselyFBI

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US Lynn, MA

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Quoted from Archieball:

Happy ending! After two weeks I got my UND6118A's from China, and they did the trick! I found a useful troubleshooting guide from Gottlieb (http://arcarc.xmission.com/Newsletters/Gottlieb%20On-Target%20Newsletters/ontarget_julyaugsept82.pdf) which allowed me to test the old chip before taking it out, and yes, the chip tested bad. Now I have a bonus display with six digits!

Thanks for that link, Archie. Lots of great technical info in those "On Target" fliers. I'm trying to figure out why my bonus and status (4-digit) displays will not display the number '1' in any position. (Otherwise work fine)

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#11 4 years ago
 
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AlonzoMoselyFBI

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US Lynn, MA

5y 38,300 91 10 1

Quoted from AlonzoMoselyFBI:

Thanks for that link, Archie. Lots of great technical info in those "On Target" fliers. I'm trying to figure out why my bonus and status (4-digit) displays will not display the number '1' in any position. (Otherwise work fine)

Update: I found that pin #2 on Z17 was shorted internally. This pin strobes the digit '1' on the bonus & status displays. I removed the IC, installed a socket and a new 7404 -- the ones are BACK.

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