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(Topic ID: 258584)

Display problem on cactus jacks

By paddythegreek

4 years ago



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    #2 4 years ago
     
    TOX

    ChrisHibler

    Chris' Pinball Repair

    US Chesterfield, MO

    12y 120K 9,992 46

    OP
    Quoted from paddythegreek:

    Also in attract mode I get both rows of displays showing exact garbage in each digit.

    I just fixed a problem identical to this with a system 80B display board. Gottlieb system 3 display boards are different from 80B display boards. In the case of the 80B display board it was U1, the first 10939 in the series.

    I would diode test each of the 7400 series chips to look for irregularities.
    —
    Chris Hibler - CARGPB #31
    Http://chrishiblerpinball.com/contact
    http://www.PinWiki.com/ - The new place for pinball repair info

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