(Topic ID: 264408)

Intermittent recognition of ball going in playfield hole


By keywest

4 months ago



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  • 4 posts
  • 3 Pinsiders participating
  • Latest reply 4 months ago by keywest
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    #1 4 months ago

    For our Key West machine there are a few holes on the playfield (10,15,22,23...) that intermittently do not register on the backglass lights or for scoring purposes. We might play 20 games where all is well but then there are ten games where these holes do not light the backglass or register as having a ball in them for completing three in a row, etc. Any clues on where to focus my attention for a fix are appreciated.

    #2 4 months ago

    It sounds like maybe the clutch is slipping on the "B" square which would cause it to never seat in the proper position. Push the button while observing what that does, it sounds like it's not grabbing properly.

    #3 4 months ago

    You need the Backglass off and the front panel down to observe what "okorange" has stated above.
    If "B" is rotating properly, it should be resting in the detent.
    If it is, the fingers on that assembly might be dirty or rusty. You may have to clean them to get a
    clean connection to light the lamps.
    Or it could be the switch contacts in the 10,15,22, and 23 holes of the playfield. I would think the
    problem is above in the "Magic Squares" assy.
    *********** BE CAREFUL....... there is 115VAC on the MOTOR TERMINALS.***********

    See Pic below of schematic...........
    ScreenHunter_207 Mar. 19 06.47 (resized).jpg

    #4 4 months ago

    Thank you gentlemen! With this info I should be able to get things working properly

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