MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

[Lgolebio]

Hi
MacBook AIR 1466
MB: 820-00165-A

I followed the power scheme https://logi.wiki/images/a/af/G3_-_S...ell.drawio.png. I have all voltages up to "PM_SLP_S5_L" = 0V. When I plug the charger it tries to power on, goes to 0,250A then goes to 0,023A and does nothing. No fan spin.

I'm confused, board looks good under microscope. No corrosion.

[mon2]

Re: MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

You may have a shorted part on the part which causes the current sensors to power down the logic board.

Remove all power. Meter in resistance mode.

Measure the resistance to ground of each coil on the board.

Each coil is linked to a local buck regulator power rail. Checking for low resistance readings.

[Lgolebio]

Re: MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

Sure.







Board is a little bit dirty with flux, because I replaced a capacitor and a TPS22924 switch.

[mon2]

Re: MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

The damaged cap in the last pic looks interesting. Check the resistance across this cap.

[Lgolebio]

Re: MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

It was replaced as I mentioned. And resistance is high.

[mon2]

Re: MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

What is the exact voltage to ground of PPBUS_G3H ?

Update:

Remove all power -> meter in resistance mode -> check the resistance to ground of PPBUS_G3H @ fuse F7140.

[Lgolebio]

Re: MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

F7140 = 8,574V, as I said all voltages are fine up to PM_SLP_S5_L based on https://logi.wiki/images/a/af/G3_-_S...ell.drawio.png

Even the battery charging works.

[mon2]

Re: MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

Are the voltages stable? The battery is able to charge at 23mA?

Remove all peripherals. No lcd, no trackpad, etc.

From the first post, you peak at 250mA and then immediately down to a rest of 23mA. Is this correct?

Check your current sense resistor loop values on each power rail. Remove all power for these checks. If there is an open leg in the current sense circuit, the unit will power down.

[reformatt]

Re: MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

With these boards, check if you get a single or double pulse on the power rails up to the CPU.

Double pulse is often a no fix and is specific to 00165 boards as I've never seen this on a 3437. I have quite a number of boards in my dumpster pile with double pulse. When I've troubleshooted them, it always comes back to the PCH.

[Lgolebio]

Re: MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

Yes, nothing is connected to the board, only power supply. Then it cycles two times and go to 0,023A

[olegi]

Re: MacBook AIR 1466 [ 820-00165-A] = Missing "PM_SLP_S5_L"

Hi Can you remove U8130 and see what is the voltage on pin 6