by Mullet » Tue Apr 28, 2015 3:50 pm
Used good magnification. Solder paste, a hot air re-work station, and kapton tape and had success with replacing the known faulty (leaky) mosfet. The only caveat was that there was a tight fit between the kapton tape, the molex picoblade header (wire housing), and the area of re-work. As a result, I ended up melting two picoblade headers. Luckily, I had replacements available just in case.
All said, I now have a working M4 again.
Due to the fact that these mosfets are end-of-life, it looks like this might be a suitable replacement...
771-PMV20XNER. Not sure if the lesser power dissapation and slower fall time would make much of a difference. They can handle more current though...