• LENOVO S340-15IWL LA-H101P Brak napięcia na pierwszych mosfetach

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LENOVO S340-15IWL LA-H101P Brak napięcia na pierwszych mosfetach

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#1 LENOVO S340-15IWL LA-H101P Brak napięcia na pierwszych mosfetach

by elenium115 • 4 October 2024, 19:39
Mam do napraw Lenovo. Mosfety wejściowe PQ311 oraz PQ312 są wyłączone brak napięcia na bramce.
Opór na cewkach wyglądają poprawnie względem masy.

PL701 - 43Ω
PLA1 - 18Ω
PLZ4 - 3,8Ω
PLZ3 - 3,8Ω
PLG1 - 5,9Ω
PL802 - 1,42Ω
PL803 - 1,42Ω

PL404 - 40kΩ i rośnie
PL402 - 9kΩ i rośnie
PL1201 - 360Ω
PL301 - 1MΩ i rośnie
PL502 - 155Ω

Po ominięciu mosfetów pobór bez baterii 0.6A laptop startuje poprawnie.
Rezystor pomiarowy PR303 jest ok przelutowałem go.
Wyminiłem mosfet i układ nimi sterujący Intersil 88739A bez zmiany zachowanie identyczne.
Coś jeszcze mogę zrobić zanim zdenerwuję się i je ominę :(

Re: LENOVO S340-15IWL LA-H101P Brak napięcia na pierwszych mosfetach

by Google Adsense [BOT] • 4 October 2024, 19:39

#2 Re: LENOVO S340-15IWL LA-H101P Brak napięcia na pierwszych mosfetach

by Vogelek23 • 5 October 2024, 11:08
elenium115 wrote:Coś jeszcze mogę zrobić zanim zdenerwuję się i je ominę :(
Żadnego omijania, jeśli nie chcesz doprowadzić do eksplozji baterii. Zdejmij zwory z MOSFETów, podłącz baterię oraz zasilacz (w tej kolejności) i zmierz napięcia względem masy na pinach 1, 2, 13, 18, 19, 20, 24, 25, 26, 29, 30 i 32 chargera PU301.

Re: LENOVO S340-15IWL LA-H101P Brak napięcia na pierwszych mosfetach

by Google Adsense [BOT] • 5 October 2024, 11:08
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