• Dell Precision 5530 z poborem 22mA - nie uruchamia się

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#1Dell Precision 5530 z poborem 22mA - nie uruchamia się


by danielb406 9 January 2024, 13:17
Dell Precision 5530, płyta główna LA-F541P Rev. 2.0 (A01). Kupiłem za grosze nie działający z uszkodzoną matrycą jak się okazało, oraz bez baterii, chałasujący wentylator GPU... Laptop nie uruchamiał się, po przeprogramowaniu BIOS wstał i działał poprawnie. Dlatego znalazłem matrycę, baterię, oraz jeden z wentylatorów przyszedł z Chin i jak nagle wszystko mam pobór 22mA z zasilacza, laptop nie uruchamia się. 3V, 5V, oraz na cewce przy baterii 19,2V jest, UT2 i UT5 kości mają zasilanie, ale UH8 nie ma - jeszcze raz zaprogramowałem, ale bez zmian. Włącznik również sprawny. Od czego zacząć? Baterii nie ładuje. Kość BIOS dostaje zasilanie dopiero po uruchomieniu laptopa rozumiem?
Za pomoc w znalezieniu przyczyny wyślę 50zł blik.

Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by Google Adsense [BOT] 9 January 2024, 13:17

#2 Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by matic 11 January 2024, 08:53
danielb406 wrote:płyta główna LA-541P
Hello!
Do you mean LA-F541P?

Does the power consumption change, when you press on the power button?

#3 Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by danielb406 11 January 2024, 10:55
Dziękuję, tak LA-F541P :oops:
Pobór prądu z zasilacza po naciśnięciu włącznika bez zmian.

#4 Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by matic 18 January 2024, 16:32
- Measure the voltages on capacitors CE17, CE18, CE31, CE40, CE44, CE1501.
Measure the following voltages to ground:
- On pin 1 of resistors PR1942, RH533, RH5869, RT1136.
- On pin 2 of resistors PR101, PR106, PR108, RE145, RH5884.
- On pads 1, 2, 4, 5, 6, 9, 13, 15 on the place of connector JAPS.
- On both pins of quartz YE1.
- On all pins of transistors QRTC, PQ1906.
Transistors QRTC, PQ1906 pinout:
Image

- Measure the voltages to ground on pin 2 of resistors RE34, RH6 in the following cases:
a) Power button released.
b) Power button pressed.

#5 Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by danielb406 23 January 2024, 14:55
Measure the voltages on capacitors :
CE17 - 3,07V
CE18 - 3,36V
CE31 - 3,37V
CE40 - 1,18V
CE44 - 3,34V
CE1501 - 0,0080V

Zmierz następujące napięcia do masy:
- Na pinie 1 rezystorów
PR1942 - 3,37V
RH533 - 3,3495V
RH5869 - 3,34V
RT1136 - 0V

On pin 2 of resistors
PR101 - 3,3V
PR106 - 3,37V
PR108 - 3,37V
RE145 - 3,34V
RH5884 - 3,07V

On pads
1 - 0,09V
2 - 0V
4 - 0V
5 - 0V
6 - 0V
9 - 3,07V
13 - 0,09V
15 - 0,02V
on the place of connector JAPS (mam same piny bez złacza).

Na obu pinach kwarc YE1
1 - 1V
2 - 0,46V

Na wszystkich pinach tranzystorów
QRTC :
1 - 3,07V
2 - 0V
3 - 3,07V

PQ1906:
1 - 3,02V
2 - 0V
3 - 0V

Układ pinów tranzystorów QRTC, PQ1906: - Zmierz napięcie do masy na styku 2 rezystorów RE34, RH6 w następujących przypadkach: a) Zwolniony przycisk zasilania. b) Naciśnięto przycisk zasilania.
RE34 naciśnięty - 0,03V
RE34 zwolniony - 3,04V
RH6 naciśnięty - 3,35V
RH6 zwolniony - 3,35V

#6 Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by matic 25 January 2024, 09:31
- Measure the resistance to ground on pin 1 of transistor QH1.
- Measure the voltages to ground on all pins of transistor QH1.
Transistor QH1 pinout:
Image

#7 Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by danielb406 25 January 2024, 18:13
matic wrote:- Measure the resistance to ground on pin 1 of transistor QH1.

19,8kohm
matic wrote:- Measure the voltages to ground on all pins of transistor QH1.

1 - 3,37V
2 - 0,30V
3 - 3,37V

#8 Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by matic 26 January 2024, 07:58
- Measure the voltages to ground on pin 1 of resistors RH309, RH515.

#9 Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by danielb406 26 January 2024, 10:33
RH309, RH515 - 3,37V

#10 Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by pehol193 26 January 2024, 12:41
Wymień układ ISL 88738, chyba U1900, typowe dla tej płyty.

Re: Dell Precision 5530 z poborem 22mA - nie uruchamia się


by Google Adsense [BOT] 26 January 2024, 12:41
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