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(Topic ID: 242890)

Voltages on Test Points of WPC Power/Driver Board?

By PolePosition

4 years ago



Topic Stats

  • 6 posts
  • 5 Pinsiders participating
  • Latest reply 3 years ago by Billc479
  • Topic is favorited by 2 Pinsiders

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    #1 4 years ago
    OP
     
    APE

    PolePosition

    Pinside+ Frequent

    7y 58,150 226

    I was curious what is the normal voltage range to expect for the various test points of a Williams WPC power/driver board?
    I have a working White Water game, and was doing some work on it over the weekend and thought I'd check the test points to get an overall sense of its health. Here's what I have:

    TP1 (+12v unregulated): 12.6v
    TP2 (+5v): 5.09v
    TP3 (+12v regulated): 11.9v
    TP6 (+50v): 69.1v
    TP7 (+20v): 19.5v
    TP8 (+18v): 16.2v

    I did not see this discussed in pinwiki, but may have missed. Any information is greatly appreciated.
    Thanks!

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    #3 4 years ago
    OP
     
    APE

    PolePosition

    Pinside+ Frequent

    7y 58,150 226

    Is there a max/min range to consider for each TP where problems start to pop up?

    I know TP2 is an issue if less than about 4.6v as it causes game resets, but with the other TP's, do you see performance changes if out of range, ie dimmer bulbs, weaker flippers, etc?

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