MacBook Air 820 - 00165, SMC _ PM _ G2 _ EN =0v

[xalapamac]

I need your help with a problem. The motherboard is 820 - 00165 and was damaged by liquid on the Smc (u5000).

I Clean the area with isopropyl alcohol and remove the components with sulphate (C142y R195), replace them with one of the same value.

The Charger does not give green light, and I have these readings:

PPBUS_G3H=8.1v
pp3v42 _ g3h = 3.41v
PP5V_S5= 0v
PP3v3 _ S5 = 0v
PPVRTC_g3h=3.41v
SMC_BC_ACOK=3.38v
Sys _ onewire = 3.39v.

SMC_ pm _ G2 _ en = 0v. The reading in diode mode of this signal is 528.

I have doubts about:
That the SMC (U5000) or the source (U7501) is energized first?.
What signals must be present for the SMC to turn on? and
what signals must be present for U7501 to turn on?

that you recommend me?

[piernov]

Re: MacBook Air 820 - 00165, SMC _ PM _ G2 _ EN =0v

SMC tells U7501 to turn on.
SMC is turned on by SMC_RESET_L.

[hlin86]

Re: MacBook Air 820 - 00165, SMC _ PM _ G2 _ EN =0v

Check if "SMBUS_SMC_5_G3_SCL" has continuously with smc. Some time liquid spill burnt the connection apart. Check test point (972) if it is burnt.