• Dell G3 15 3500 Wistron PCB SELEK G3 MLK N18P 19795-1 Niska rezystancja w lini 5V_S5

It is currently 14 December 2024, 06:46

Dell G3 15 3500 Wistron PCB SELEK G3 MLK N18P 19795-1 Niska rezystancja w lini 5V_S5

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#1 Dell G3 15 3500 Wistron PCB SELEK G3 MLK N18P 19795-1 Niska rezystancja w lini 5V_S5

by psikus123 • 28 March 2024, 15:18
Witam Kolegów
W laptopie po podłączeniu zasilania gasła dioda w zasilaczu uszkodzony był PU5541 rezystancja na cewce PL4551 była około 1 Ohma, po wymianie wzrosła do 2 Ohm.
Zdemontowałem cewkę i na pad z niską rezystancją podałem 1V - pobór był niewielki, zasilacz nie wykazywał przeciążenia więc podniosłem napięcie do 5V i grzał się PU5001 zdemontowałem go i rezystancja wzrosła do 7 Ohm
PU5001 nie wykazuje sam w sobie zwarcia.
Czy mogę dalej na tą linię podać 5V i szukać dalej?
7Ohm na linii 5V to za nisko.
Proszę kolegów o pomoc w diagnozie.

Re: Dell G3 15 3500 Wistron PCB SELEK G3 MLK N18P 19795-1 Niska rezystancja w lini 5V_S5

by Google Adsense [BOT] • 28 March 2024, 15:18

#2 Re: Dell G3 15 3500 Wistron PCB SELEK G3 MLK N18P 19795-1 Niska rezystancja w lini 5V_S5

by matic • 29 March 2024, 11:25
psikus123 wrote:uszkodzony był PU5541
Hello!
You probably mean PU4551.
In such a case, all the chips powered from the "5V_S5" power rail are usually damaged.

psikus123 wrote:i grzał się PU5001 zdemontowałem go i rezystancja wzrosła do 7 Ohm
PU5001 nie wykazuje sam w sobie zwarcia.
If this chip gets warm/hot during the test, it's definitely damaged.

psikus123 wrote:Czy mogę dalej na tą linię podać 5V i szukać dalej?
Yes, you can.

psikus123 wrote:7Ohm na linii 5V to za nisko.
Yes, this resistance is definitely too low. The correct resistance should be in kΩ range.
As mentioned, all the chips connected to this power rail may be damaged.

#3 Re: Dell G3 15 3500 Wistron PCB SELEK G3 MLK N18P 19795-1 Niska rezystancja w lini 5V_S5

by romicamp • 1 April 2024, 14:43
Проверь ключи питания USB.

Re: Dell G3 15 3500 Wistron PCB SELEK G3 MLK N18P 19795-1 Niska rezystancja w lini 5V_S5

by Google Adsense [BOT] • 1 April 2024, 14:43
 This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).
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