Im in the middle of repairing my Nazgul, iv replaced an arm and a motor to date and just thought id power it up[ via a smoke stopper just to be on the safe side…
I tripped straight away so I started a little fault finding and disconnected the FC from the ESC and tried again. It tripped, so I’m wondering if the battery I’m using would cause this as its not a fully charged 1?.
If no then its just a case of un-soldering the motor 1 by 1 and basically stripping back to bare bones and keep testing till I’m just left with components.
So you have the fc fully disconnected and only motors connected to the esc board now? Are all the motors free spinning by hand? No screws touching the stator of the motors?
So remove everything else and just check your ESC and motor wiring with a continuity tester.
GND and VBAT should NOT have continuity to any motor pad or each other. You may get slight beeps between them as the capacitor charges/discharges.
Motor pads should HAVE continuity to both of the other pads on the same motor. This is through the motor coils, so if you remove the motor then there should be no continuity.
Motor pads should NOT have continuity to any other motor pads on different motors.
If any of that is not as it should be, then you may have a busted ESC. Do a visual check of the components, any burn marks etc could be the problem.
Was just about to post this Bardwell video on exactly the same thing but @Yith beat me too it lol I will post it anyway as sometimes its good to have a visual reference to help
Get some IPA and a cotton swab and clean it up and have a closer inspection, it might just be dirt making it look like its bridged.
Continuity test between the pins of the power pigtail will also give you a better idea. (Make sure everything is disconnected from the ESC first)
Also a short beep followed by nothing means it’s fine (that’s just the capacitor) If its a long continuous beep then their is 100% a short somwhere on the ESC.