(Topic ID: 270842)

1972 Chicago Coin Home Run Knocker not working!

By PinballTom113

3 years ago



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    #1 3 years ago

    When you score enough runs to win a game the credit advances but the knocker does not work. Please help!

    #2 3 years ago

    I don't have that schematic, but this might be similar.

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    #4 3 years ago

    According to the Home Run schematic the knocker does NOT fire when you earn/add credits. The knocker is only fired when the bat relay (bat re) pulls in during a bat swing, to simulate the crack of the bat.

    If you do not get the knocker during a swing, then check the third switch (contact C) on the bat relay for a clean and proper closure.

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    #5 3 years ago
    Quoted from jeffc:

    According to the Home Run schematic the knocker does NOT fire when you earn/add credits. The knocker is only fired when the bat relay (bat re) pulls in during a bat swing, to simulate the crack of the bat.

    Wow, that's different!!

    #6 3 years ago

    That's CC for ya. OP, does it knock when batting as intended? If not, it could be simply disconnected if a previous owner found it annoying, dunno how that could be but ya never know!

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