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(Topic ID: 276572)

WPC switch matrix oddity


By EStroh

53 days ago



Topic Stats

  • 4 posts
  • 4 Pinsiders participating
  • Latest reply 52 days ago by PinballManiac40
  • No one calls this topic a favorite

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    #1 53 days ago

    WPC fliptronics 2 (Black Rose)

    In switch edge test I'm getting a strange issue between columns 5 and 2.

    If I hit ANY switch in column 5, it not only registers there, but also the corresponding switch in column 2. For example, if I hit the switch at col5 row1, it will register as a contact with BOTH col5 row1 AND col2 row1.

    It doesn't happen in reverse (activating a switch in column 2 just registers as expected).

    Any ideas?

    Probably not related: also happening at this time the cannon immediately fires when a ball is loaded. The switch for the fire button is in column 3, so I'm not sure what's going on here.... but both issues started at the same time. Odd

    #2 53 days ago

    Perhaps a short downstream of a diode on column 5 that connects it to column 6?

    #3 52 days ago

    Remove J205 from the MPU board and test again. Just a hunch.

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