Macbook A2338 820-02020 5v

[MrPhoneDoctor]

Hi Everyone new here, I am working on the above macbook model that is not charging. It turns on with a charged battery however does not take charge. I am thinking this has something to do with current sensing.
I put under thermal camera and had chips UF400 and UF260 heat up. I replaced these 2 chips and heating is no longer present. UF260 was reprogrammed with proper bios. I am stumped, have spent few days trying to figure this out so am now reaching out to all you masters out here.

Below are some readings before fuse removal.

Ameter - 20v in 5v load & 0-150ma fluctuating power.

F5200
Voltage - 4-5v fluctuating
diode - .518

UF400
FF200 - 4-5v fluctuating
LDO - 1.5v
LDO Core - 3.3v

UF500
FF202 - 4-5v fluctuating
LDO - 1.5v
LDO CORE 3.3v

PPBUSAON - 8-12v Fluctuating
PP3V8_AON -3.8v

Removed fuse to test upstream and am now getting constant 12v on pin 1 F5200
Diode Pin 1 F5200 .566
Diode pin 2 f5200 - .510

 

[2informaticos]

First of all, welcome to the forum!

Did you replace UF400 from donor board, same model and position?

 

[MrPhoneDoctor]

First of all, welcome to the forum!

Did you replace UF400 from donor board, same model and position?

I purchsed the uf400 from my vendor phone lcd parts. Installed in correct position. Attached is photo of chip removed and the new chip installed.

 

[2informaticos]

With "position" I meant that it MUST be removed from same position of donor board (same model).
I wasn't talking about chip orientation, when soldering.

Please, write directly into bottom reply box, instead of clicking Reply button.
I don't see any reason to quote an entire post, visible few centimeters above.

 

[MrPhoneDoctor]

Ok so I don't know what position the chip came from. It was purchased individually from my parts vendor.
Do I need to get a Donor board with same model # 820-02020 and replace the new chip on the right that was installed?

 

[2informaticos]

Exactly, CD3217 chips require to maintain their position.

 

[MrPhoneDoctor]

Thank you, the donor has been ordered will let you know once transplanted and outcome.