Automated Fixtures - No power to Mac 250K

[HairyAz]

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

[65535]

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.

[HairyAz]

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.

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?

[mstaylor]

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?

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

[65535]

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.

[MNicolai]

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