(Topic ID: 208668)

Need Help Undoing Interlock Bypass

By fatcake

6 years ago



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  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 6 years ago by wayout440
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    #1 6 years ago

    I bought a super clean Who Dunnit and I've been enjoying the heck out of it!

    I was doing a general look over and noticed that one of top interlock switch was out of its metal bracket and was dangling free behind the bracket. Note that the game played fine when it was dangling off the bracket with the coin door closed. So I went and put the switch back into the bracket. Now when I close the coin door the flippers don't work, and when I open the coin door the flippers work. So I'm assuming that someone bypassed the interlock and the interlock allowed the game to play when it was dangling. So its all backwards.

    What's the correct way to undo this? I tried to reading the schematic but couldn't find anything obvious. Sorry if this is a bit of a newbie question, but this is my first WPC game and these are so much more complex than the early solid state machines that I'm used to!

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    #2 6 years ago

    Looks like your wires are swapped around. For example, one interlock switch is supposed to make/break the white/red set of wires.

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    #3 6 years ago

    Perfect! Where did you find that? Was that in the schematic and I just missed it?

    #4 6 years ago
    Quoted from fatcake:

    Perfect! Where did you find that? Was that in the schematic and I just missed it?

    Found in the IPDB .pdf online schematics. It's on the transformer diagram page.

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