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Vendo 720 multiple columns vend


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I'm attempting to tackle this old gremlin again. I have a vendo 720 that vends multiple columns simultaneously. Currently, I saw most motors work fine. However, when column 8 ran, 3 ran too.  When 10 ran, 5 ran as well.  I can only test vend these selections if the sold out paddles are depressed in the column I am testing.  I have already replaced the harnesses from the board to the motors with no success. Although most of the machine functions properly, these multiple vends make the machine an obvious problem.

At this point, I'm not sure if the previously replaced board shorted out on me (broken standoffs allowed metal contact) or if bad motors could cause this or something else. I'm open to all suggestions and I will be replacing the board.

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