• HP 255 G9 Płyta LA-K205P brak reakcji na włącznik, uszkodzona przetwornica 5V

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#1 HP 255 G9 Płyta LA-K205P brak reakcji na włącznik, uszkodzona przetwornica 5V


by sircom2 22 January 2025, 13:02
Sprzęt jak w temacie , rezystancje na PL-kach ok, brak zwarć. na płycie mam 19V i 3,3V . Brak napięcia 5V . Po podłączeniu zasilania zapala się lampka ładowania baterii. Jednak na termowizji mocno grzeje się PU302 , nie mogę odszukać schematu a oznaczenie kodowe dla google nic nie mówi . Układ PU302 ma oznaczenie CUHEIA - lub JA . Prośba o identyfikacje układu lub pomoc w doborze zamiennika . Z góry dziękuje.

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Re: HP 255 G9 Płyta LA-K205P brak reakcji na włącznik, uszkodzona przetwornica 5V


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#2 Re: HP 255 G9 Płyta LA-K205P brak reakcji na włącznik, uszkodzona przetwornica 5V


by matic 23 January 2025, 09:05
Hello!

It's Silergy SY8370CTMC.
Datasheet of a very similar chip attached.

Measure the resistance directly on marked capacitor.
Image



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#3 Re: HP 255 G9 Płyta LA-K205P brak reakcji na włącznik, uszkodzona przetwornica 5V


by sircom2 23 January 2025, 10:49
Na zaznaczonym elemencie mam 12kΩ, nie wiem ile być powinno ale wydaje mi się że jest ok. Zamawiam układ i sprawdzam. Dzięki za poświęcony czas.

Re: HP 255 G9 Płyta LA-K205P brak reakcji na włącznik, uszkodzona przetwornica 5V


by Google Adsense [BOT] 23 January 2025, 10:49

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