• DELL Inspiron 3537 - nie działa bez baterii

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#1 DELL Inspiron 3537 - nie działa bez baterii


by hanomag 11 January 2017, 16:07
DELL Inspiron 3537
Płyta LA-9982P

Laptop po zalaniu, nie uruchamiał się, miał zwarcie w linii CHG_B+.

Aktualnie uruchamia się tylko z baterią, ładuje. Bez baterii natychmiast gaśnie i nie można uruchomić.

ACOFF bez baterii około 260mV, z baterią 0V. Wymieniać KBC?

Proszę o sugestie.

Re: DELL Inspiron 3537 - nie działa bez baterii


by Google Adsense [BOT] 11 January 2017, 16:07

#3 Re: DELL Inspiron 3537 - nie działa bez baterii


by hanomag 11 January 2017, 17:33
Machine wrote:Short circuit has been eliminated?

Of course - yes. Laptop works when battery is present, also charging.
Why ACOFF is rising to 260mV, when power supply is plugged?

#5 Re: DELL Inspiron 3537 - nie działa bez baterii


by hanomag 11 January 2017, 19:57
PQ701:
D1 - 19,75V
D2 - 19,39V
S - 19,75V
G - 19,75

PU701:
5 - 3,38V
6 - 2,59V
16 - 6V
20 - 19,75V

#6 Re: DELL Inspiron 3537 - nie działa bez baterii


by JPserwis 11 January 2017, 21:33
Na tranzystorze pq701 nie masz przebicia między g-s?

#7 Re: DELL Inspiron 3537 - nie działa bez baterii


by hanomag 12 January 2017, 06:35
Sprawdzałem to już - nie ma przebicia.

#8 Re: DELL Inspiron 3537 - nie działa bez baterii


by JPserwis 12 January 2017, 08:44
Kbc narazie bym nie ruszał. Sprawdz tranzystor pq706. Zasilacz w biosie prawidłowo wykrywany?

#9 Re: DELL Inspiron 3537 - nie działa bez baterii


by dominik555 12 January 2017, 09:33
Podaj napięcie noga 3 i 4 z układu PU701.

#10 Re: DELL Inspiron 3537 - nie działa bez baterii


by hanomag 12 January 2017, 09:52
n.3 - 17,90V
n.4 - 20V

#11 Re: DELL Inspiron 3537 - nie działa bez baterii


by dominik555 12 January 2017, 11:25
Pomiar na samym zasilaczu?

#12 Re: DELL Inspiron 3537 - nie działa bez baterii


by hanomag 12 January 2017, 11:28
Tak

#13 Re: DELL Inspiron 3537 - nie działa bez baterii


by dominik555 12 January 2017, 11:40
hanomag wrote:PQ701:
D1 - 19,75V
D2 - 19,39V
S - 19,75V
G - 19,75

PU701:
5 - 3,38V
6 - 2,59V
16 - 6V
20 - 19,75V


Te pomiary też na samym zasilaczu?

#14 Re: DELL Inspiron 3537 - nie działa bez baterii


by hanomag 12 January 2017, 11:53
Tak

#16 Re: DELL Inspiron 3537 - nie działa bez baterii


by dominik555 12 January 2017, 12:29
Ogólnie to:
ACDRV Charge pump output to drive both adapter input n-channel MOSFET (ACFET) and reverse blocking n-channel MOSFET (RBFET). ACDRV voltage is 6V above CMSRC when voltage on ACDET pin is between 2.4V to 3.15V, voltage on VCC pin is above UVLO and voltage on VCC pin is 275mV above voltage on SRN pin so that ACFET and RBFET can be turned on to power the system by AC adapter. Place a 4kΩ resistor from ACDRV to the gate of ACFET and RBFET
limits the in-rush current on ACDRV pin.


Rozumiem, że LDO - VREG3 masz na samym zasilaczu?

#17 Re: DELL Inspiron 3537 - nie działa bez baterii


by hanomag 12 January 2017, 12:31
Podałem wcześniej pomiar:
hanomag wrote:n.3 - 17,90V
n.4 - 20V


Lecz zmierzyłem jeszcze raz, aktualnie mam:
n.3 - 19,7V
n.4 - 19,7V

Pomiary cały czas robię na samym zasilaczu.

#19 Re: DELL Inspiron 3537 - nie działa bez baterii


by dominik555 12 January 2017, 12:38
Według mnie to charger do wymiany.

#20 Re: DELL Inspiron 3537 - nie działa bez baterii


by Vogelek23 12 January 2017, 12:54
Sprawdź jeszcze napięcie na n. 12 układu PU701 przed jego wymianą.

Re: DELL Inspiron 3537 - nie działa bez baterii


by Google Adsense [BOT] 12 January 2017, 12:54

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