• lenovo legion y750 Brak 3.3V i 5V

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lenovo legion y750 Brak 3.3V i 5V

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
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#1 lenovo legion y750 Brak 3.3V i 5V

by michal1490 • 15 November 2025, 14:10
Witam
Oznaczenie płyty FlY00 La-J561P rev:1B

Po podłączenie zasilacza brak napięcia na cewkach 3.3V oraz 5V . Po wciśnięciu przycisku power i przytrzymanie go napięcia się pojawiają.
Napięcie na przetwornicy PU401

1- 0,46V
2- 0
3- 3,3v
4- 0V
5- 1,04V
6 - 0V
7 - 0V
8- 0V
9 - 4,8V
10 - 0V
11 - 0V
12- 20V
13- 5V
14- 0V
15- 0V
16- 0V
17-4,8V
18- 0V
19- 0V
20 -0V

Przeprogramowany Bios oraz KBC
Mogę prości o pomoc w rozwiązaniu problemu

Re: lenovo legion y750 Brak 3.3V i 5V

by Google Adsense [BOT] • 15 November 2025, 14:10

#3 Re: lenovo legion y750 Brak 3.3V i 5V

by michal1490 • 15 November 2025, 16:23
Oporności na wszystkich cewkach:
PL402 2,1KΩ
PL403 1,7KΩ
PL502 400Ω
PL1201 2,6kΩ
PLZ6 - 7,5 Ω
PLZ4 - 2,5Ω
PLZ5 - 2,5Ω
PLZ 8- 2,7Ω
PLZ 7 - 2,8Ω
PLZ9 - 23Ω
PL1809 -83Ω
PL1801 - 1,6KΩ
PLV3 - 0,2Ω
PLV4 -0,2Ω
PLW3 - 30Ω
PLW4 - 30Ω
PL702 - 106Ω
PL302 - 3,4KΩ

Brak napięci na cewkach, dopiero jak trzyma się włącznik pojawiają się napięcia na cewce PL402 - 3.3V , PL403 - 5V

Re: lenovo legion y750 Brak 3.3V i 5V

by Google Adsense [BOT] • 15 November 2025, 16:23
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