• Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji

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#1 Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by poster 4 June 2024, 06:55
Acer Aspire S7-391
Plyta: Wistron Storm 12223 48.4WE05.011
CPU: i5-3337U
PCH: SLJ8C
KBC: IT8518VG FXS

Laptop nie reaguje na przycisk power (chociaż raz samoistnie się uruchomił). Ładuje baterię.
Przy podłączonej baterii na cewce PL4101 pojawia się 1.29V (a powinno tu być 3.3V 3D3V_PWR).
Napiecia VREG3 i VREG5 obecne
PU4103:
pin3 = 3,30V
pin13 = 5,01V

KBC oraz kość SPI dla KBC (U6001) są prawidłowo zasilane.

Po odpięciu baterii PL4101 = 0V. Dziwi mnie to 1,29V które się tam pojawia.

Proszę o pomoc w dalszej diagnozie płyty.

Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by Google Adsense [BOT] 4 June 2024, 06:55

#3 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by poster 4 June 2024, 18:24
PG4104, PG4105:
Choke side = 15kΩ, 0V (AC only); 0V (AC+BAT connected)
Q3607 side = 30kΩ, 0.04V (AC only); 2.11V (AC+BAT connected)

poster wrote:PU4103:
pin3 = 3,30V
pin13 = 5,01V

An also PWR_3D3V_EN and PWR_5V_EN are present.
Pin 6 = 3.30V
Pin20 = 3.30V

#4 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by matic 5 June 2024, 06:55
Measure the voltages to ground on pins 1, 5, 7, 9, 14, 17 of chip PU4103 with the jumpers PG4104, PG4105 opened.

#5 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by poster 5 June 2024, 21:08
PU4103 = TI51275 with the jumpers PG4104, PG4105 opened:
1 = 0.48V
5= 0.74V
7 = 0V
9 = 5.64V
14 = 0V
17 = 4.83V

#6 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by matic 5 June 2024, 21:16
Replace the chip PU4103 (TPS51275RUKR).

#7 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by poster 5 June 2024, 22:23
Chip replaced.
PU4103 (AC only, PG4104, PG4105 opened):
1 = 0.48V
3 = 3.29V
5= 0.70V
6 = 3.28V
7 = 0V
9 = 5.34V
13 = 5.01V
14 = 0V
17 = 4.81V
20 = 3.28V

#8 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by matic 6 June 2024, 07:16
Measure the following voltages to ground with the jumpers PG4104, PG4105 opened:
- On pin 12 of chip PU4103.
- On pin 4 of transistors PU4101, PU4105.

#9 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by poster 6 June 2024, 21:38
pin 12 of chip PU4103 = 19.47V
PU4101 pin4 = 19,47V
PU4105 pin4 = 19,47V

#10 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by matic 7 June 2024, 06:46
Please, post a clear picture of chip PU4103 area of the board with a nearby surroundings.

#11 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by poster 7 June 2024, 21:51
Image

Image

#12 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji  [SOLVED]


by matic 10 June 2024, 10:03
Check the resistors PR4103 (39.2kΩ), PR4107 (57.6kΩ), PR4106, PR4108 (both 2.2Ω).

#13 Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by poster 10 June 2024, 20:08
Found PR4108 damaged. After soldering new one, board works.

Thanks alot!

Re: Acer Aspire S7-391 Wistron Storm 12223 48.4WE05.011 brak reakcji


by Google Adsense [BOT] 10 June 2024, 20:08

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