(Topic ID: 276572)

WPC switch matrix oddity

By EStroh

1 year ago

Topic Stats

  • 4 posts
  • 4 Pinsiders participating
  • Latest reply 1 year ago by PinballManiac40
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    #1 1 year 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 1 year ago

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

    #3 1 year ago

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

    Chris Hibler - CARGPB #31
    http://www.PinWiki.com/ - The new place for pinball repair info


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