(Topic ID: 265419)

1974 Gottlieb Big Brave "Bonus Stuck" Issue


By Jamesholm1

54 days ago



Topic Stats

  • 7 posts
  • 2 Pinsiders participating
  • Latest reply 50 days ago by DaMoib
  • Topic is favorited by 1 Pinsider

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    #2 54 days ago

    Check the operation of your "On Add Bonus Unit" switch (indicated in the picture). As a bonus is added, this switch should open and release the hold on the "A" relay.

    If you open the switch during the bonus runaway, does it stop?

    bonusunitswitch (resized).jpeg
    #3 53 days ago

    A 2B motor switch releases the hold on the "D" relay, check that switch out, too.

    Does the machine have the same bonus lock/runaway behavior if you simply hold down the "I" rollover switch?

    Another issue that could cause the behavior is a drop target, rollover or rollover button switch that is gapped too closely.

    If your bonus lights are operating correctly, I don't think the extra wire on the disk of the bonus unit is an issue.

    DrelayRelease (resized).png
    #6 53 days ago

    That's 1C, move clockwise one more switch stack (against the side of the cabinet) and down one level for the 2B switch. Match the wire colors to identify the correct switch.

    https://pinwiki.com/wiki/index.php?title=EM_Repair#Gottlieb.C2.AE_Score_Motor

    #7 50 days ago

    It looks like the upper blade of your "On Add Bonus Unit" switch is missing a contact and definitely needs to be replaced. That might cause scoring problems when you activate a lit star rollover button (100 points plus bonus), but I don't think it can cause the bonus stuck problem.

    MissingUpperContact (resized).jpg
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