• ACER NITRO 5 AN515, płyta LA-H501P - brak zasilania CPU

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#1 ACER NITRO 5 AN515, płyta LA-H501P - brak zasilania CPU


by krisark 25 November 2024, 08:12
Witam wszystkich,
ACER NITRO 5 AN515-55, płyta LA-H501P Rev: 1A
Laptop uruchamia się, ale nie wyświetla obrazu.
Pobór prądu oscyluje w okolicy 0,500A.
Wgrany inny BIOS i KBC z forum, ale jest identycznie.
Wszystkie inne zasilania się obecne i prawidłowe, grafika startuje bo nagrzewa się delikatnie.
Na cewkach PLZ1,PLZ2,PLZ3,PLZ4 - 0V, rezystancja 3,75Ω.

PUZ2:
pin 1 - 5,02V
pin 2 - 2,00V
pin 3 - 4,86V
pin 4 - 5,09V
pin 5 - 0,00V
pin 6 - 0,00V
pin 7 - 0,00V
pin 8 - 0,00V

PUZ1:
pin 15 - 19,06V
pin 16 - 5,0,1V
pin 17 - 4,86V
pin 27 - 5,09V
pin 39 - 1,05V
pin 40 - 1,04V
pin 41 -0,07V
pin 42 - 1,05V
pin 43 - 3,42V
pin 45 - 3,43V

Na układzie PUZ2, pin 2 brak sygnału na oscyloskopie.
Proszę o pomoc w znalezieniu problemu.

Re: ACER NITRO 5 AN515, płyta LA-H501P - brak zasilania CPU


by Google Adsense [BOT] 25 November 2024, 08:12

#2 Re: ACER NITRO 5 AN515, płyta LA-H501P - brak zasilania CPU


by krisark 2 December 2024, 08:41
Nikt nie ma żadnego pomysłu?

#3 Re: ACER NITRO 5 AN515, płyta LA-H501P - brak zasilania CPU


by tekort 2 December 2024, 12:09
Sprawdź czy któryś PQZ od zasilania procesora nie ma zwarcia, to bardzo częste na tej platformie. Zwarcie często występuje między bramką a drenem, jeśli tak jest to poszło 19V na CPU i dlatego nie odpala. Miałem też przypadek zwarcia na cewce PLG od GPU Intela na tej płycie.

#4 Re: ACER NITRO 5 AN515, płyta LA-H501P - brak zasilania CPU


by krisark 2 December 2024, 15:48
Już wszystko sprawdziłem, wcześniej.
Tranzystory PQZ są sprawne, w tym przypadku płyta startuje ale brak obrazu, nie ma zwarcia na linii B+.
Na cewce PLG jest 8,70Ω, PQG1 sprawny.
Więc to zły trop.

#5 Re: ACER NITRO 5 AN515, płyta LA-H501P - brak zasilania CPU


by matic 3 December 2024, 12:39
Measure the power consumption of the board, when the machine is turned on without RAM memory connected.

#6 Re: ACER NITRO 5 AN515, płyta LA-H501P - brak zasilania CPU


by krisark 3 December 2024, 13:42
Sama płyta bez wentylatorów, itd.
Z pamięcią RAM: 0,374A
Bez pamięci RAM: 0,376A

Re: ACER NITRO 5 AN515, płyta LA-H501P - brak zasilania CPU


by Google Adsense [BOT] 3 December 2024, 13:42

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