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Lakai started a topic 820-01958 PPVCC_NAND_SSD0 problem

in Troubleshooting Laptops, Tablets, and Mobile Devices

11-05-2023, 03:58 AM
820-01958 PPVCC_NAND_SSD0 problem

Hi all!

Got this lightly water damaged (C6528 fried).
20V generated, everything seems to warm up, but I have problems with U9060.
This little guy is outputing 7V
So it cycles on trying to power SSD.
I try to read datasheet,TPS62130 seeems to be adjustable but by what?
Hope SSD is not fried.

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Lakai replied to Macbook A1706 no power

in Troubleshooting Laptops, Tablets, and Mobile Devices

10-21-2023, 11:58 PM
Re: Macbook A1706 no power

PPVCC_S0_CPU 7 ohm
PPVCCGT_S0_CPU 5 ohms
PPVCCSA_S0_CPU 3 ohms
PPBUS_G3H to PPVCC_S0_CPU=477 ohms
PPVCCIO_S0_CPU to ground=2 ohms

Forgot to mention, board is 820-00239...

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Lakai replied to Macbook A1706 no power

in Troubleshooting Laptops, Tablets, and Mobile Devices

10-21-2023, 09:35 AM
Re: Macbook A1706 no power

When L7960 removed:
PPBUS_G3H 13.1 V
PP3V3_G3H 3.3 V
PP3V0_G3H 3.0 V
No cpu rails, 0v6 rail or 1v rail
PP1V8_SUS 0.015v
PP5V_S4 5.14 V
PP3V3_S5 3.35 v
PP3V3_S5_T139 3.3 V

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Lakai replied to Macbook A1706 no power

in Troubleshooting Laptops, Tablets, and Mobile Devices

10-21-2023, 05:39 AM
Re: Macbook A1706 no power

820-00239 sir

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Lakai started a topic Macbook A1706 no power

in Troubleshooting Laptops, Tablets, and Mobile Devices

10-21-2023, 04:43 AM
Macbook A1706 no power

Hi all!
Got this touchbar 2016 macbook, topcase and battery replaced by apple for the ancient owner, suddenly died.
No corrosion or liquid trace, perfect condition.

-20v negociated
-no PPBUS_G3H

Removed f7000, short on pin2, then I have PPBUS_G3H 13V.
Injected 0.9v 2A on pin2 of F7000, power removed, the only component that gets little warm is U7960.
Removed L7960, current injection on pin2, amperage rising to 2.4A then stabilizes...

Any clues for this one?

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Lakai replied to New Members - please post your introductions here

in Announcements & Related News

10-21-2023, 03:32 AM
Re: New Members - please post your introductions here

Hi from france.
Long time lurker, just repairing macbooks as hobbyist.

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820-01958 PPVCC_NAND_SSD0 problem

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Macbook A1706 no power

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