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Help with air hockey digital scoreboard

Discussion in 'Troubleshooting and Repair' started by hugabone, Sep 22, 2015.

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  1. hugabone

    hugabone

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    0
    Sep 22, 2015
    I just bought a used air hockey with a overhead scoreboard. The problem is both goals sometimes counts on their own, if you disconnect both goals then neither counts. I tried adjusting the sensors but eventually they will count. I think the problem is with the controller because after about forty seconds the scoreboards will flicker and it seems to really happen after the flicker. I have some background in electronics but havent dealt with it on the board level in about twenty two years. Where should I look, would it help if I up loaded the board? thanks
     
  2. dorke

    dorke

    2,342
    665
    Jun 20, 2015
    Please start with brand and model.
    Schematics and/or service manual may help a lot.
    Take some closeup photos as well and upload them.
     
  3. hugabone

    hugabone

    3
    0
    Sep 22, 2015

    Attached Files:

  4. dorke

    dorke

    2,342
    665
    Jun 20, 2015
    Can you describe the "flicker"?at what rate?
    Is the display readable when it flickers?
    Doe it count correctly before it stars "flickering" ?

    On one display board(the one without the LEDs) there are signs of something spilled.
    It needs cleaning with rubbing alcohol and a cotton swab- especially near the bare wires.

    There are 6 LEDs on the other board,what are they indicating?
    Can you please take photos of the print side of both display boards.
     
  5. hugabone

    hugabone

    3
    0
    Sep 22, 2015
    The scoreboard has two identical sides, they both will start to go dim at about 40 seconds after the timer starts, a minute or so later they will totally go out for about a split second. Once it flickers a few times the scoreboard no longer counts. It still flickers whether the two goal sensors are connected or not.

    It is still readable, they just go dim then a little while later they go totally out for a bit. How can a video be uploaded here?
     
  6. dorke

    dorke

    2,342
    665
    Jun 20, 2015
    What is feeding power to the board?What voltage?
    Is there a Power Supply?

    Try touching the parts on the board,Any parts are warm or getting hot?

    Have you got a DMM?
    If so measure the voltage on DZ and U02(2 pins).

    Don't know how to load video here,you can load on youtube or such and post the link here.
     
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