• Dell inspiron 15 zwarcie, gaśnie dioda w ładowarce

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#1 Dell inspiron 15 zwarcie, gaśnie dioda w ładowarce


by viperr2 15 March 2019, 15:04
Witam, naprawiany sprzęt to dell Inspiron 15, płyta główna Cedor_intel-MB. 13269-1 (fx3mc) rev A00.

Laptop jest martwy, po podpięciu oryginalnego zasilacza dioda w zasilaczu gaśnie. Zrobiłem próbę zwarciową i grzeje się PU4201. Prosiłbym o pomoc w naprawieniu płyty.

Re: Dell inspiron 15 zwarcie, gaśnie dioda w ładowarce


by Google Adsense [BOT] 15 March 2019, 15:04

#2 Re: Dell inspiron 15 zwarcie, gaśnie dioda w ładowarce


by marcin79 15 March 2019, 15:25
Jaka rezystancja na PU4201 nóżki 1,4,8 względem masy?

#3 Re: Dell inspiron 15 zwarcie, gaśnie dioda w ładowarce


by viperr2 15 March 2019, 16:52
1S- 1,74 KΩ
4G -39KΩ
8D - 138KΩ

#5 Re: Dell inspiron 15 zwarcie, gaśnie dioda w ładowarce


by viperr2 15 March 2019, 18:03
1,5Ω i maleje

#6 Re: Dell inspiron 15 zwarcie, gaśnie dioda w ładowarce


by marcin79 15 March 2019, 18:28
Rozlutuj zworki PG4402 i PG4403 i zmierz jeszcze raz rezystancję na PU4402
Image

#7 Re: Dell inspiron 15 zwarcie, gaśnie dioda w ładowarce  [SOLVED]


by matic 15 March 2019, 21:03
It is a short circuit to ground on main power rail. No need to remove the jumpers PG4402 and PG4403, because the short circuit is not caused by the charger chip PU4404 almost for sure.

Perform a short circuit test described here on any pin of resistor PR4402. For a short circuit test limit the voltage to 1V.
It is probably bad one of the filer capacitors in the main power rail.

#8 Re: Dell inspiron 15 zwarcie, gaśnie dioda w ładowarce


by viperr2 16 March 2019, 13:43
matic miał rację, kondensator był uszkodzony. Po wymianie wszystko działa. Dzięki wielkie

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