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Automated Fixtures No power to Mac 250K

Discussion in 'Lighting and Electrics' started by HairyAz, Jan 4, 2012.

  1. HairyAz

    HairyAz Member

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    Looks like I blew a 2Amp / 250v fuse on the power supply on my Mac250K.

    Symptom was that the LED was not lighting up. According to the manual you should want 3 green LED indicator lights on the board. After replacing the blown fuse, I only see one and have no LED display on the outside of the fixture. Any ideas what might be going on here? This happened to both fixtures I was using. I am wondering if I had an arc in a cable and it blew both. But if the fuse is bad, is it possible it got to shorting something else like the power supply?

    Any help is appreciated.

    Thanks
  2. 65535

    65535 Member

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    There are 3 fuses on the unit I would check/replace all 3. Make sure everything is still attached, I don't know what replacing fuses on that unit entails, but make sure everything is plugged in.
  3. HairyAz

    HairyAz Member

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    I replaced all 3 fuses. Now here's what's odd... the 2amp fuse immediately blew when I powered back up. Replaced the fuse again just to see if it was a bad fuse, same thing happened.

    Is it possible I have a short somewhere? Thoughts?
  4. mstaylor

    mstaylor Well-Known Member

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    Sure sounds like it. Start at the fuse and start tracing back from there.
  5. 65535

    65535 Member

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    My first inclination is you are using the wrong power to feed these units. If not it could be anything from a small short somewhere on the board that can be fixed easily to something very wrong with the fixture.
  6. MNicolai

    MNicolai Well-Known Member Premium Member

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    Did you replace the 2A fuse with a fast-blow fuse instead of a slow-blow?

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