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(Topic ID: 180356)

Gottlieb System 1 Displays - What do you guys think?

By Arcane

7 years ago



Topic Stats

  • 6 posts
  • 5 Pinsiders participating
  • Latest reply 7 years ago by ForceFlow
  • Topic is favorited by 1 Pinsider

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    #1 7 years ago
    OP
     
    YCV

    Arcane

    Pinside member

    US Raleigh, NC

    7y 54,550 890 6

    I just received my Janin PI-1 board and installed it with just A1J1, A1J2, A1J3 and A1J6 connected. Basically, Power supply, Display controls and the Coin door switches.

    This is what I am getting:
    DSC02658 (resized).JPGDSC02658 (resized).JPG
    Obviously, Player 2 and Player 4 displays seem to be good.
    Player 1 and Player 3 displays have issues as well as the Credit display.
    I moved the culprit displays around; apparently the issues are moving with the displays. Here is a closeup:
    DSC02659 (resized).JPGDSC02659 (resized).JPG
    What do you think can be done for these displays and the credit display? Are the chips still available?

    Thanks for your help and suggestions.
    Yves

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    #2 7 years ago
     
    TOX

    ChrisHibler

    Chris' Pinball Repair

    US Chesterfield, MO

    12y 120K 9,997 46

    With power off, reseat the connectors on the display a few times.

    Retest.

    The udn6118 chips can still be found. Sometimes the glass just fails too, rarely.
    --
    Chris Hibler - CARGPB #31
    http://ChrisHiblerPinball.com/contact/
    http://www.PinWiki.com - The new place for pinball repair info

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    #3 7 years ago
     
    WOZ

    woz

    Pinside member

    14y 77,050 1,866

    Be careful not to break the glass nipple on the back of the display!

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    #4 7 years ago
     
    ZAC

    zacaj

    RPC

    US Rochester, NY

    11y 158K 10,387 85 122 1

    Do a diode test between the ground and five volt pins on the chips to the other pins, compare it with the good displays

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    #5 7 years ago
     
    TOX

    ChrisHibler

    Chris' Pinball Repair

    US Chesterfield, MO

    12y 120K 9,997 46

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    #6 7 years ago
     
    ---

    ForceFlow

    Pinside Moderator

    9y 238K 31,369 268 14

    Quoted from woz:

    Be careful not to break the glass nipple on the back of the display!

    I usually put a glob of Silicon caulk on the hippie to help protect it before I do any work. It cures within 24 hours.

    The display with bleeding segments probably has a short wither in the segment driver chip, the caps, or the resistor.

    I would start by replacing the resistor. Then if that didn't work, test the chip, then if that's ok, replace the caps.

    For the display missing the digit, that can be one of several things, which would be covered on pinwiki--the segment driver chip, connector issues, possibly a cracked solder joint on one of the legs for the glass, or a broken leg on the glass.

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