• laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania

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#1 laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by Krzys 17 February 2024, 12:34
Witam wszystkich,
trafiła dom nie laptop jak w temacie lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 z uszkodzonym gniazdem zasilania. Po wymianie gniazda niestety laptop nie uruchamia się. Napięcie jest obecne tylko przed pierwszym tranzystorem PQ5400 brak jest napięcia na bramce. Na PU5400 VCC 19V obecne, ACDET - 2,7V.
Co mogę jeszcze pomierzyć.

Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by Google Adsense [BOT] 17 February 2024, 12:34

#2 Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by clops35 17 February 2024, 15:47
Cześć,

Czy na samej baterii laptop się uruchamia?

Zmierz napięcie na n.24 PU5400 po podłączeniu zasilacza, bez baterii.

Zmierz rezystancję do masy na rezystorze pomiarowym PR5425.

#3 Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by Krzys 23 February 2024, 16:22
Na nodze 24 jest 6V.
Nie wiem czy na baterii się uruchamia bo jest rozładowana, ale na pewno nie jest ładowana.
Natomiast jak pominąłem PQ5400 (zwarłem go ) to laptop się uruchomił.

#5 Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by Krzys 24 February 2024, 11:42
Machine wrote:Measure the voltages on pins 3, 4, 5, 6, 11, 12 of PU5400.

3-0V
4-0V
5-0V
6-2,6V
11-0V
12-0V

#7 Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by Krzys 26 February 2024, 20:20
Na PQ5400 była duża rezystancja, wymieniłem PU5400, rezystancja zmalała ale nadal to samo.

#9 Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by clops35 28 February 2024, 09:46
Zmierz napięcia na n. 1, 2, 3 PD5400 i n.28 PU5400.

#10 Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by Krzys 28 February 2024, 16:40
Machine wrote:Measure the voltages on pins 3, 4, 5, 6, 11, 12 of PU5400.


3-0V
4-0V
5-0V
6-2,6V
11-0V
12-0V

PD5400 1- 19,7V, 2-20V, 3-0V
noga 28 PU5400 - 19,7V

#11 Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by clops35 29 February 2024, 11:02
Zmierz rezystancję pomiędzy n.1-4, 1-8, 4-8 PQ5400 i PQ5401 wyniki pomiarów opublikuj.

#12 Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by Krzys 2 March 2024, 14:07
clops35 wrote:Zmierz rezystancję pomiędzy n.1-4, 1-8, 4-8 PQ5400 i PQ5401 wyniki pomiarów opublikuj.


PQ5400
n.1-4 - 160ohm, 1-8- 23Kohm, 4-8- 23Kohm
i PQ5401
n.1-4- 132ohm, 1-8- 14ohm, 4-8- 140 ohm

#13 Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania  [SOLVED]


by clops35 2 March 2024, 15:20
Wymień oba te mosfety.

#14 Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by Krzys 6 March 2024, 17:46
wymieniony PQ5401 i laptop uruchamia się .

Re: laptop lenovo ideapad 3 15ITL6 płyta NM-D471 rev.2.0 brak zasilania


by Google Adsense [BOT] 6 March 2024, 17:46

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