Looking for a short on VCC MAIN, injected 4.2v blew component
Title pretty much sums it up. I soldered a wire to a cap near the pmic. I hooked the positive up and heard pop and saw a little puff of smoke.
I had a diode reading on vcc main of 0.152, thats why i tried to inject voltage, but as soon as i did the voltage limiting on my dcps kicked in and voltage went to 0 while amps went to 5.16.
The strange thing is that i went through each component and cap on main but didnt find the fried component. Any ideas on what happened, this is the first time ive injected voltage into a line so im unclear on safe voltages to find a short but not blow it off the board.
Is this a good question?