• Acer AN515-57 LA-L181P REV: 1C martwy

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#1 Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 17 January 2024, 13:07
Witam kolegów.

Acer AN515-57
LA-L181P REV: 1C
PCH: SRKMA
CPU: SRKT1
EC: ENE9052QD



Laptop zupełnie martwy, właściciel zrobił konserwację chłodzenia i od tej pory laptop nie reaguje na nic, twierdzi, że bateria była odpięta.
Nie widzę żadnych przypaleń czy uszkodzeń mechanicznych, ani podejrzanie niskich rezystancji.
Jedyne napięcia są na
PL501-5V
oraz na cewce baterii
Brak 3,3V na PL301

PL301 - 4,6 kOhm
PU301
5-19V
11-4,49V
15-0,3V
17-3,19
Proszę kolegów o pomoc w dalszej diagnozie.

Re: Acer AN515-57 LA-L181P REV: 1C martwy


by Google Adsense [BOT] 17 January 2024, 13:07

#2 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by mmike 17 January 2024, 14:06
Co masz na n.1 JKB1?
Sprawdź czy w tej platformie nie masz switcha od zamknięcia obudowy.

#3 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 17 January 2024, 14:21
Na n 1 JKB1 3,3V spada do 0 po wciśnięciu power.
Switcha brak

#4 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by carrneiro 17 January 2024, 17:30
Zasilacz klienta?
Jaki pobór po podpięciu zasilania na zasilaczu serwisowym?
Jaki pobór po włączniku na zasilaczu serwisowym?
Sprawdziłeś linię ADAPDET?

#5 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 18 January 2024, 10:05
Moje zasilacze serwisowe , a mam dwa nie rozmawiają z Acerami tymi mocniejszymi, dlatego używam oryginalnego z podpiętym miernikiem.
Pobór prądu bez baterii 0,015A brak reakcji po wciśnięciu power po kilkunastu sekundach spada do 0,007A.
Jak sprawdzić linię ADAPDET? mam na niej 0V\
Zauważyłem przy oględzinach dziurkę w UX1 czyli nie była odpięta bateria przy podpinaniu taśmy.
UX1 sam w sobie nie ma zwarcia.
Czy PCH mógł się uszkodzić?
Image

#6 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 23 January 2024, 09:20
Wymieniłem PU301 zachowanie płyty bez zmian.
Ma ktoś z kolegów jakieś pomysły?
czy na PL1002 20 Ohm to nie za nisko?

#8 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 23 January 2024, 11:53
Dziękuję Machine za zainteresowanie.
PL301 4,7 kOhm
PL501 10 kOhm rośnie 5V
PLM1 0,7 kOhm
PL1102 0,65 kOhm
PL1801 1,97 kOhm
PLW1 93 Ohm
PLV2 0,33 Ohm
PLV3 0,33 Ohm
PLV4 0,33 Ohm
PLB2 20 kOhm rośnie 0,2V
PLH2 29 Ohm
PLH3 29 Ohm
PLH4 29 Ohm
PLH14 29 Ohm
PLG101 175 Ohm
PL1002 20 Ohm

Tylko na dwóch cewkach jest jakieś napięcie

#10 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by matic 23 January 2024, 16:27
Which GPU chip is on this board?

#11 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 23 January 2024, 19:53
gn20-p0-a1
Czy 0,33 Ohm dla tej grafiki jest za nisko?

#12 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by matic 24 January 2024, 08:14
If this value is the resistance with the test leads excluded, then I think the resistance is fine for this type of the GPU chip.

- Remove the chip UX1 from the board and measure the resistance to ground on pad 1 on the place of this chip with the matrix connected to the board.
Also measure the following resistances to ground:
- On pin 6 of chip PU2501.
- On pin 1 of chips UT1, UVD2.
- On pins 8, 14 of chips UQ1, UQ2, UV11.

#13 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 24 January 2024, 10:13
dziękuję matic za zainteresowanie.
Rezystancja moich przewodów jest 0 Ohm
Pomiary
UX1
1 - 5,3 kOhm

PU2501
6-8k Ohm rośnie

UT1
1 - nie mogę namierzyć na płycie nie zgadza się boardview, który mam

UVD2
1 - nieobsadzony na padzie OL

UQ1
8 - 6k Ohm rośnie
14 - 3,8 kOhm rośnie


UQ2
8 - 33 KOhm rośnie
14 - 3,8 kOhm rośnie

UV11.

8 - 50 kOhm
14 - MOhm

#14 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by matic 24 January 2024, 10:43
- Measure the voltages to ground on pins 19, 37, 67, 68, 100, 101, 104, 107, 110, 112, 115, 116 of KBC chip.

- Measure the voltages to ground on pins 114, 122 of KBC chip in the following cases:
a) Power button released.
b) Power button pressed.

#15 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 24 January 2024, 11:42
19 - 0V
37 - 0V
67 - 3,25V
68 - 3,25V
100 - 0V
101 - 0V
104 - 3,25V
107 - 0V
110 - 3,25V
112 - 3,25V
115 - 3,25V
116 - 0V


114 - 3,25V
114 wciśnięty 0V

122 - 0V
122 wciśnięty - 0V

#16 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by matic 24 January 2024, 14:33
- Measure the voltages to ground on both pins of quartz YH1. It's best to measure it with an oscilloscope, if you don't have it, measure with a multimeter.
- Measure the voltages on capacitors CH17, CH18.
- Measure the voltage to ground on pin 1 of diode DH1.
Diode DH1 pinout:
Image

#17 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 24 January 2024, 15:08
CH17 - 3,1V
CH18 - 3,1V
DH1
pin1 - 3,1V
Image
Image
Image

#18 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 30 January 2024, 11:08
Koledzy jakieś pomysły? podejrzenia?

#19 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by matic 31 January 2024, 16:21
psikus123 wrote:[ Obrazek ]
[ Obrazek ]
I think you don't know how to use an oscilloscope.
Set the voltage sensitivity on your oscilloscope to 2Vdc/div and the time base to 10µs/div.
Use a probe with 10x attenuation. Make sure you connect the ground clip of the probe to ground on the board and perform the measuremens again.

#20 Re: Acer AN515-57 LA-L181P REV: 1C martwy


by psikus123 1 February 2024, 12:47
matic wrote:
psikus123 wrote:[ Obrazek ]
[ Obrazek ]
I think you don't know how to use an oscilloscope.

To prawda :?
Image
Image

Według Twoich zaleceń.

Re: Acer AN515-57 LA-L181P REV: 1C martwy


by Google Adsense [BOT] 1 February 2024, 12:47
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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