• Dell Latitude 5510 płyta LA-J381P martwy

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Dell Latitude 5510 płyta LA-J381P martwy

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
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#1 Dell Latitude 5510 płyta LA-J381P martwy

by dggn • 24 October 2024, 09:06
Laptop nie uruchamia się kompletnie. Po podłączeniu zasilacza grzeje się delikatnie układ PU2.
Napięcia na nim licząc od lewej
n1. 18.80V
n2. 0V
n3. 3.3V

rezystancja licząc od lewej
n1. 1.6MΩ
n2. 12Ω
n3. 17.8kΩ

Rezystancja na cewkach
PL1 1.47MΩ
PL2 1.42MΩ
PL4 295kΩ
PL100 5.25kΩ
PL101 61kΩ
PL201 189Ω
PL301 3.2Ω
PL501 1.4Ω
PL610 4.1Ω
PL612 6.2Ω
PL613 3.9Ω
PL614 15.6Ω
PL615 3.7Ω
PL701 40kΩ

Schematu nie udało mi się znaleźć. Czy coś mogę sprawdzić ?

Re: Dell Latitude 5510 płyta LA-J381P martwy

by Google Adsense [BOT] • 24 October 2024, 09:06

#2 Re: Dell Latitude 5510 płyta LA-J381P martwy

by ctro • 24 October 2024, 09:29
Zmierz napięcia do masy na tych cewkach, jakie są po podpięciu zasilacza i ew czy jest jakaś reakcja na guzik na cewkach, na których nie ma napięcia. Musisz kilka razy przekładać sondy i wciskać guzik.

#3 Re: Dell Latitude 5510 płyta LA-J381P martwy

by dggn • 24 October 2024, 09:54
na PL4 mam 19.88V reszta cewek 0V i brak reakcji na przycisk

#4 Re: Dell Latitude 5510 płyta LA-J381P martwy

by matic • 29 October 2024, 08:46
- Post a clear picture of the chip PU2 with nearby surroundings.
- Measure the power consumption (in mA) of the board without the battery connected.

#5 Re: Dell Latitude 5510 płyta LA-J381P martwy

by dggn • 28 November 2024, 09:03
okolica PU2
Image
Płyta pobiera 4mA

a jeszcze zauważyłem robotę kogoś przede mną przy UC9 - fotografia poniżej. Może też coś wniesie
Image

#6 Re: Dell Latitude 5510 płyta LA-J381P martwy

by matic • 28 November 2024, 09:57
Your pictures are not very clear. Post better pictures with visible markings on the chips PU2, PU402, UC9.

dggn wrote:Po podłączeniu zasilacza grzeje się delikatnie układ PU2.
dggn wrote:Płyta pobiera 4mA
If this chip heats up, the power consumption must be definitely greater than 4mA.

Re: Dell Latitude 5510 płyta LA-J381P martwy

by Google Adsense [BOT] • 28 November 2024, 09:57
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