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Thread: Stern Meteor driver board firing 2 solenoids at once

  1. #1

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    Stern Meteor driver board firing 2 solenoids at once

    Ok, next up is Meteor which i've had for a almost a year and never gotten working properly!
    When i got it, the slingshots where not wired properly which i eventually fixed....but it still has issues!


    The issue is when the M-E-T-E-O-R drops are all down it resets the bank but also resets drop bank 3. When all drops are down on 3, it resets METEOR drops

    The same with 1 and 2. Either one that goes down will reset the other.

    I swapped out the MPU board with an ALTEK board. the exact same issues happened but the sound was also ****ed.

    I swapped the Solanoid driver board out with one that was in another machine that needs fixing, its a BALLY board and not Stern.
    The issues don't happen at all with the other board. but some other small issues happen with the other board even though it is seemingl fine in the other machines.


    The Stern board that is in there has some burnt tracks that seem to have been fixed 'OK'. im not an expert on how clean they should be.


    Attached is a picture of the board hacks and a video of the machine in solanoid test which you can see double resets.

    - - - Updated - - -

    Original board in test









    Altek board gameplay



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    Board hacks

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    Original dude who probably tried to repair it years and years ago marked these 2 connectors if that helps with clues!


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    Actually there are no burnt tracks around the yellow and orange wires. Had he just joined them for no reason and that's why maybe 2 signals are going through?

  5. #5

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    Whilst the 74L154 chips do go bad, usually it's just bad connections on J4. Replace the molex header and pins is always a good tactic if skills and parts permit. This fixes most "wrong solenoid firing" issues in my experience. You should also do the molex on the other end too (CPU board). (Dodgy quick fix is to hit the molex up with DeOxit to try and track down the bad connection).

    BUT... you open saying "2 solenoids at once". If it really is 2 at once, then the 74L154 is my main suspect. The circuit is designed so that only one solenoid can fire at a time.
    Tangles' Pin Parts.

    Pinball Replacement Boards - Designed and Manufactured in Australia
    http://tanglestech.com

  6. #6

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    also agree with mr tangles ...you need to repin it before you get excited changing chips

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    I've repined almost all connectors a while ago. But I ran outvof connectors and it was 6 months ago and I stupidly can't remember which ones I've done.


    If the other board doesnt have the same issue then it's probably not the pins right?

  8. #8

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    it might be the board yes.

    "some other small issues happen with the other board even though it is seemingl fine in the other machines." is likely connector related though

  9. #9

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    Unless it is the pins on the board.......reflowing solder can be your friend.

    - - - Updated - - -

    Screw you Doug, too fast for me
    ************************************************** *******************
    Remember--The early bird catches the worm, but the second mouse gets the cheese!

  10. #10

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    Quote Originally Posted by furballx View Post
    Unless it is the pins on the board.......reflowing solder can be your friend.

    - - - Updated - - -

    Screw you Doug, too fast for me
    awww lol .you're right though ...the 100 header pins on a bally board can look innocent and be screwy as well as the connector pins

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