(Topic ID: 294382)

KAHR WPC MPU Power Fix Circuit add-on daughterboard

By zhu808

2 years ago


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  • 81 posts
  • 23 Pinsiders participating
  • Latest reply 1 year ago by Asmig
  • Topic is favorited by 5 Pinsiders

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    #31 2 years ago
    Quoted from zhu808:

    Thank you very much for this explanation. I did read extensively through the l.v. reset section for WPC systems on PinWiki about all of the things you mentioned.
    I'll be doing some probing soon. Assuming the 12V circuit reads low, is there any way to bring it back up within parameters without getting rid of the mods, or is this always going to be the case? So, since the mods run off of the 12V circuit, the l.v. reset won't be triggered because it runs off of the 5V circuit (assuming it doesn't drop below 4.7V)?

    Fix the 12v circuit. Usually the cap is the culprit and needs replacement. Hopefully it hasnt leaked and taken out a bunch of components.

    #35 2 years ago
    Quoted from phishrace:

    Did you see the list of mods above? Color dmd, tiger saw blade motor and hat motor are all likely running off 12 volts. Who knows what else is running off the 12 volts.
    Needs a separate 12 volt power supply plugged into the utility outlet and a bunch of the mods moved to that supply. After that is done, the 12 volts should be tested on the driver board before any repairs are attempted.

    Wrong post! My mistake.

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