Hello,

I've been confronted with a big problem.

I am using APM2.5 + the Power sensor board to provide the +5V. 

The output JP is removed to provide seperately power to output (gimbal servos).

I experimented with a new PPM converter which didn't work yesterday. The guy who build it said I shoud check power. I did and found 4,4V on the input line.

Then I saw smoke and now lights are out for the APM2.5.

The power-meassurment-module provides 5,3V!

The APM2.5 is still alive, but only when powered directly by ESC on the Input line.

So is there any fuse on the power supply/meassurement port?

I don't know what to do. I am devestated. I need some ideas. Please.

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Replies

  • What's the fuse part number ?

    Thanks

  • Same problem, different solution.

    I could only arm my APM 2.8 when connected through a USB cable.

    I got ~5v on both sides of the fuse, but only on the bottom (exterior) side of the diode.  top (interior) side was dead.

    I was looking at replacing/bypassing the diode.

    I'd previously used ESC's (yes, multiple) and then a UBEC to power the FC.  When I instead used the power lead from an APM power module, I then got ~5v on both sides of the diode.

    I assembled the works and it all arms/flies fine now.

    Worth a shot...

    Unsure of the explanation, but it proved a relatively simple fix.

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