• Brak ładowania, spalone elementy - laptop ASUS UX3490, płyta UX490UAR

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#1 Brak ładowania, spalone elementy - laptop ASUS UX3490, płyta UX490UAR


by dfcom 4 December 2025, 14:54
Cześć, mam do naprawy laptop ASUS UX3490U. Płyta UX490UAR. Klient ładował całą noc i nic się nie naładował, podłączył ponownie rano i spod laptopa poszedł dym.
Zdjęcia spalonego elementu - ktoś pomoże zidentyfikować co to jest ? jest na nim chyba 6dg opisane.
Image
Dodatkowo zapytam po pierwsze czy coś jeszcze tu warto sprawdzić? Laptop normalnie się uruchamia ale nie ładuje baterii. Zauważyłem na tym układzie BGA (tps65982da) tuż obok spalenia że są takie ciemniejsze kondensatory - zaznaczyłem na czerwono. Jest na nich zwarcie do masy - to jest normalne?
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Re: Brak ładowania, spalone elementy - laptop ASUS UX3490, płyta UX490UAR


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#2 Re: Brak ładowania, spalone elementy - laptop ASUS UX3490, płyta UX490UAR


by matic 4 December 2025, 15:23
dfcom wrote:Zdjęcia spalonego elementu - ktoś pomoże zidentyfikować co to jest ? jest na nim chyba 6dg opisane.
[ Obrazek ]
An actual marking on this component is SDG.
It's LDO regulator Texas TPS70933DBVR.
Datasheet attached.

dfcom wrote:Dodatkowo zapytam po pierwsze czy coś jeszcze tu warto sprawdzić?
Yes. Remove this chip from the board and measure the resistance to ground on the output (pin 5) on the place of this chip.

dfcom wrote:Zauważyłem na tym układzie BGA (tps65982da) tuż obok spalenia że są takie ciemniejsze kondensatory - zaznaczyłem na czerwono. Jest na nich zwarcie do masy - to jest normalne?
[ Obrazek ]
These components are not capacitors, they are ferrite beads (filter coils).
It's normal that they have low resistance between the pins, but not to the ground.



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Re: Brak ładowania, spalone elementy - laptop ASUS UX3490, płyta UX490UAR


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