My QMX+ worked perfectly on all Bands for 1 day until today. When I tried to connect the QMX+ via USB c to my laptop to use Putty. It did not work, then suddenly : smoke and bad smell. Now my QMX+ is dead, can not switch on. Is tehre an issue with USB c or did the buck converter fire? thanks for help. Guido HB9BQB
Daniel No, when I saw the smoke, I detached the PS as fast as possible. I can not see any burnt component or even traces of smoke. The USB cable is under suspicion, may be defective. But I can not see how this cable could do any harm?
Problem resolved! Happy again. There was a short on the 3.3V Buck converter, between D102 and Q107. D102 was soldered not precise on track and made contact with Q107. Had to replace the buck converter.
Daniel Conklin