• HP 15-eh DAG7HFMB8C0 - PO ZALANIU - IDENTYFIKACJA ELEMENTU

It is currently 7 January 2025, 14:46

 [SOLVED] HP 15-eh DAG7HFMB8C0 - PO ZALANIU - IDENTYFIKACJA ELEMENTU

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#1 HP 15-eh DAG7HFMB8C0 - PO ZALANIU - IDENTYFIKACJA ELEMENTU

by bumper1 • 18 December 2024, 09:46
HP 15-eh3333nw
Platforma: DAG7HFMB8C0
REV: C
CPU: RYZEN 5 7530U
KBC: IT5570E

Panel usb:
G7HA-USB-8L
REV:D
DAG7HATB8D0

Laptop po zalaniu. Głównie panel usb, który robi zwarcie (bez niego laptop uruchamia się).
Zwarcie na panelu, w gałęzi 5V. Między gniazdem usb a układem "JWCXJ" SOT23-5 jakiś model "power distribution switch" do zasilania usb.
Wylutowałem układ, i po kolei kondensatory na tej gałęzi. Zwarcie puściło dopiero po wylutowaniu czarnego elementu (obudowa 0402).
Wylutowany ma 2 Ω (w obie strony). To rezystor, czy jakaś dioda- proszę o pomoc w identyfikacji.

Image

Re: HP 15-eh DAG7HFMB8C0 - PO ZALANIU - IDENTYFIKACJA ELEMENTU

by Google Adsense [BOT] • 18 December 2024, 09:46

#2 Re: HP 15-eh DAG7HFMB8C0 - PO ZALANIU - IDENTYFIKACJA ELEMENTU  [SOLVED] 

by wof • 18 December 2024, 10:49
SMD Type ESD Suppressor TVM0G140M900R

#3 Re: HP 15-eh DAG7HFMB8C0 - PO ZALANIU - IDENTYFIKACJA ELEMENTU

by bumper1 • 18 December 2024, 12:40
Dziękuję. Przeszukałem schematy i znalazłem je tylko na kilku modelach HP. Czy te parametry są krytyczne?
Image

Czy sprawdzi się tam np. AZ5725-01F który jest w identycznym miejscu, na lenovo, ale ma operating voltage 5,5 V; ESD CLAMPING VOLTAGE = 10 V.

edit: jakiś problem z obrazkiem.
TVM0G140M900R ma continuous voltage 14 V, clamping voltage 38 V, inne parametry też się różnią.

#4 Re: HP 15-eh DAG7HFMB8C0 - PO ZALANIU - IDENTYFIKACJA ELEMENTU

by wof • 18 December 2024, 13:37
TVM0G140M900R is used on several other places on G7HA platform, even 3V lines - like fingerprint, cardreader, audiojack... 14V is Max.Continuous Voltage...I expect it is used like overvoltage protection - so Varistor Voltage parametr is also to consider.

#5 Re: HP 15-eh DAG7HFMB8C0 - PO ZALANIU - IDENTYFIKACJA ELEMENTU

by bumper1 • 19 December 2024, 11:39
Zdobyłem element z płyty dawcy. Usb działa. Dziękuję za pomoc w identyfikacji.

Re: HP 15-eh DAG7HFMB8C0 - PO ZALANIU - IDENTYFIKACJA ELEMENTU

by Google Adsense [BOT] • 19 December 2024, 11:39
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