Any history fault available?
What about PPBUS_AON and 3V8_AON?
Check diode mode to ground on S2 power rails.
What about PPBUS_AON and 3V8_AON?
Check diode mode to ground on S2 power rails.
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A2337 820-02016 2020 Macbok Air Stays On 5V
- Thread starter MeTech Turkey
- Start date
Jumps in diode mode?
I hope you didn't check with power applied.
BTW, write directly into reply box, instead of clicking Reply button.
I hope you didn't check with power applied.
BTW, write directly into reply box, instead of clicking Reply button.
MeTech Turkey
Member
It is 0.676 on diode mode, my fault. Im sorry. It is so busy at the shop and customers took my head off today.
Check diode mode on all big coils.
Also check for any voltage spike.
Should check diode mode on master/slave PMUs rails too.
Also check for any voltage spike.
Should check diode mode on master/slave PMUs rails too.
MeTech Turkey
Member
Okay will do as first thing in the morning and let u know.
MeTech Turkey
Member
LC710 on P3V3S2_SW and PP3V3_S2 gives ground on both legs on diode mode
i have checked all big coils and all i found is the one written above
i have checked pmu rails seems no problem (i dont know if i did it right, i have checked them also on diode mode)
And when I measure it I can see small voltage spikes on LC710 too from 0.00V to 0.024 and back and again
i have checked all big coils and all i found is the one written above
i have checked pmu rails seems no problem (i dont know if i did it right, i have checked them also on diode mode)
And when I measure it I can see small voltage spikes on LC710 too from 0.00V to 0.024 and back and again
Compare resistance to ground at LC710 with known good board.
If is pure short, something got burnt there.
If is pure short, something got burnt there.
MeTech Turkey
Member
I have sorted the problem out. First I took the LC710 our of the board and checked the legs on diode mode. And found the short line. And it was 3.3V leg. So ı took the board under thermal camera and gave 3.3V to that line and found shorted capacitor. Moved it away. Put the LC710 back measured it again and Yay no shorts anymore and back to live.