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is it a transistor or mosfet? its behaving like N channel mosfet because when i touch black probe of multimeter on top single pin (drain) and red probe on right bottom pin (source) multimeter is reading 0.5v in diode mode.
General question - does anyone have advice on how to most easily desolder the analog stick modules on this board? My fancy Hakko FR-300 desolder gun works perfectly on the 1537 and 1708 models, but for reasons I can?t explain it has a really tough time pulling the solder from this board. I am using rosin core flux and even mixing in leaded solder to each joint, and applying heat with a heat gun, but it is still unbelievably difficult to desolder.
If you are measuring that with a DMM that will not really be accurate enough to see exactly what is going on there. You need to put a scope on there to really see what the actual U9 Output is doing because the Enable line of that thing is turned on/off 125 times per second by the MCU, so the Output is also turned on/off 125 times per second.Could be a leaky or shorted cap on the Output of U9 dragging the voltage down or a bad Hall sensor doing it or as you mentioned U9 could also have petered out.