• Dell precision 5520 La-e331P rev 2.0 - nie wykrywa zasilacza

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#1 Dell precision 5520 La-e331P rev 2.0 - nie wykrywa zasilacza


by Yamaiko 10 March 2025, 18:12
Witam, od samego początku laptop się nie włączał ( świeciły się diody i gasły).Po odpięciu bateri laptop się uruchomił, wymieniłem więc baterie+gniazdo zasilania (było w środku wyłamane). Laptop wstał i wszystko było okej - wykrywał stan naladowania a także ładował baterie po czym postanowiłem zobaczyć na starej bateri jak to się ma i laptop też wstał co ciekawe ale brak bateri w pasku. Po zainstalowaniu znów nowej laptop nie ładuje baterii a w biosie zasilacz wisi jako unknow. Powierzyłem mosfety jedynie zauważyłem, że pq302 ma spadek napięcia dren-zródło 0,187V, powiedział bym że strasznie nisko. Jak myślicie ?

Re: Dell precision 5520 La-e331P rev 2.0 - nie wykrywa zasilacza


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#2 Re: Dell precision 5520 La-e331P rev 2.0 - nie wykrywa zasilacza


by matic 10 March 2025, 21:26
Yamaiko wrote:pq302 ma spadek napięcia dren-zródło 0,187V, powiedział bym że strasznie nisko.
Hello!
Have you measured it out of the board?
Do you get this voltage drop with both polarities of the test leads, or just one polarity?

#3 Re: Dell precision 5520 La-e331P rev 2.0 - nie wykrywa zasilacza


by Yamaiko 10 March 2025, 21:27
On the board one polarity

#4 Re: Dell precision 5520 La-e331P rev 2.0 - nie wykrywa zasilacza


by matic 10 March 2025, 22:21
So this transistor is probably fine, but it needs to be checked out of the board to make sure.

- Measure the voltages to ground on pins 1, 4, 5 of transistors PQ200, PQ201 with the power supply connected only (without the battery).

#5 Re: Dell precision 5520 La-e331P rev 2.0 - nie wykrywa zasilacza


by Yamaiko 11 March 2025, 00:46
Pq200: p1 20V , p4 9.6V p5 20V
PQ201: p1 20V, p4 9,97V p5 20V
Measure only with power supply without the battery

#6 Re: Dell precision 5520 La-e331P rev 2.0 - nie wykrywa zasilacza  [SOLVED]


by matic 11 March 2025, 13:26
Measure the voltages to ground on all pins of transistor PQ100 with the power supply connected only (without the battery).
Transistor PQ100 pinout:
Image

#7 Re: Dell precision 5520 La-e331P rev 2.0 - nie wykrywa zasilacza


by Yamaiko 11 March 2025, 20:27
Temat rozwiązany uszkodzony był rezystor pr102, dziękuję za pomoc :)

Re: Dell precision 5520 La-e331P rev 2.0 - nie wykrywa zasilacza


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