• MacBook Air A2337 (820-02016-A) - brak podświetlania LCD (po zalaniu)

It is currently 8 January 2026, 12:19

MacBook Air A2337 (820-02016-A) - brak podświetlania LCD (po zalaniu)

 Forum rules: Click here to view the forum rules

  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
  3. Before posting a new topic please read all topics in TRAININGS subforum and make a preliminary diagnostic based on the content of those trainings.
  4. Uploading of any complete schematics, BIOS / firmware files or any other kind of documentation, or linking to 3rd party websites with such files, is STRICTLY PROHIBITED. You can only upload the small portion of documentation or, link to BIOS file on UNVERIFIED BIOS FILES subforum, which simplifies the diagnostics/repair. You are not allowed to upload more then one complete page of instruction/schematic per single topic. The file you upload must not contain any watermarks, "confidential" markings, links or email addresses and cannot be password-protected.
  5. It is only permitted to describe one faulty device per single topic - you should always open a new topic for each subsequent device.
  6. Requesting of the full schematics, BoardView files, BIOS files or any other kind of documentation is NOT ALLOWED in this subforum. If you need to ask for any of these, you should open a new topic in DOCUMENTATION/BIOS REQUEST subforum.

#1 MacBook Air A2337 (820-02016-A) - brak podświetlania LCD (po zalaniu)

by DaCoPL • 31 December 2025, 12:21
Laptop: MacBook Air A2337
Płyta: 820-02016-A

Sprzęt jest po zalaniu. Kapnęło na elektronikę związaną z USBC (naprawione), ale tez niestety na elektronikę matrycy. Lekko zalane złącze cienkiej taśmy flex (naprawione). Zalane również pod blaszką ekranującą na elektronice matrycy. Podniosłem blaszki i zalanie było z lewej strony płytki, na odwrotnej stronie głównego złącza idącego do płyty głównej laptopa (zaznaczam na zdjęciu). Linia I2C_BKLT_SDA miała zwarcie 40Ω do masy. Wyczyściłem diody po zalaniu, wylutowałem i wlutowałem ponownie. Zwarcie ustało i pojawiło się 5V na tej linii.

Niestety dalej brakuje PPVOUT_LCDBKLT.
PPVIN_LCDBKLT_R = 12V
LCDBKLT_EN_L = 12V (tutaj jak wnioskuje powinno zejść niżej, żeby tranzystor QP800 się załączył, więc UP800 uszkodzony, albo problem z magistralą danych?)
BKTL_EN_R = 1.8V

Co moge jeszcze sprawdzić/zmierzyć?

Image

Re: MacBook Air A2337 (820-02016-A) - brak podświetlania LCD (po zalaniu)

by Google Adsense [BOT] • 31 December 2025, 12:21
Similar Topics
MacBook Air A2337 - nie przełącza na 20V
  Apple MacBook AIR 13 A2337 M1 - Problem z baterią  [SOLVED]
  Macbook Air A1466 płyta 820-3437-B bardzo wolna praca  [SOLVED]
Schemat Apple MacBook Air 15 2024 A3114 820-03286 051-09343
Schemat Apple MacBook Air 13 2024 A3113 820-03285 051-09344
  MacBook Air 13 A1466, płyta 820-3437-A - wentylator na max oraz wolno pracuje.  [SOLVED]

Who is online

Users browsing this forum: No registered users and 13 guests

_______________________________
All rights reserved. Unauthorised copying of this website's content or any of its part is strictly forbidden.
Any trademarks, brand names, products or services published on this website belong to their legal owners, are copyrighted and used for information purposes only.