• Lenovo Ideapad L340-15IRH NM-C361 rev.1 Brak napięć

It is currently 14 December 2024, 07:59

Lenovo Ideapad L340-15IRH NM-C361 rev.1 Brak napięć

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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.
  3. Before posting a new topic please read all topics in TRAININGS subforum and make a preliminary diagnostic based on the content of those trainings.
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#1 Lenovo Ideapad L340-15IRH NM-C361 rev.1 Brak napięć

by victrix1 • 26 February 2024, 14:18
Cześć, mam problem z diagnozą Lenovo Ideapad L340-15IRH Gaming.
Płyta: FG541/FG741 NM-C361 rev.1
Płyta po zalaniu. Miała zwarcie w sekcji zasilania B+ poprzez skorodowane kondensatory w okolicy chargera oraz zwarcie do bramki na kluczu wejściowym. Charger, skorodowana drobnica, wszystkie układy, gdzie znalazła się ciecz zostały naprawione. Na slocie ramu też są ślady zalania. Płyta startuje, reaguje na włącznik power. Pobór prądu to (stały) 0,020A. Po włączeniu miga dioda power 12 razy, raz czerwona i się restartuje.
Napięcia, które występują na płycie: 3/5V Valw, 1,05V Valw, 1,8Valw oraz 0,225V od ładowania baterii (napięcia chargera ok).
KBC:
pin 2 - 3,27V
pin 12 - 1,78V
pin 18 - 0,00V
pin 21 - 0,00V
pin 26 - 3,30V
pin 69 - 2,89V
pin 72 - 1,89V
pin 76 - 3,29V
pin 86 - 3,30V
pin 107- 0,00V
pin 108 - 3,26V
pin 111 - 3,29V
pin 128 - 3,29V
Rezystancja na cewkach:
PL301 - 44,02kΩ / 0,225V
PL3502 - 5,80kΩ/ 5V
PL3501 - 4,60kΩ/ 3,3V
PL503 - 98,30Ω/ 1,05V
PL502 - 4,39kΩ/ 1,8V
PL501 - 204Ω
PL701 - 95,8Ω
PL7502 - 1,70Ω
PL7501 - 1,70Ω
PL3201 - 27,06,Ω
PL3001 - 3,00Ω
PL3002 - 3,00Ω
PL3004 - 3,00Ω
PL3003- 2,90Ω
PL5501 - 45,6Ω
Podmieniony wsad bios - bez zmian. Podejrzewam uszkodzone PCH. Proszę o pomoc.

Re: Lenovo Ideapad L340-15IRH NM-C361 rev.1 Brak napięć

by Google Adsense [BOT] • 26 February 2024, 14:18

#3 Re: Lenovo Ideapad L340-15IRH NM-C361 rev.1 Brak napięć

by victrix1 • 1 March 2024, 14:14
93 pin of kbc- 3,3V

Re: Lenovo Ideapad L340-15IRH NM-C361 rev.1 Brak napięć

by Google Adsense [BOT] • 2 March 2024, 10:34
 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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