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

It is currently 14 December 2024, 07:57

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

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
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#21 Re: Acer AN515-57 LA-L181P REV: 1C martwy

by matic • 1 February 2024, 13:11
That's much better.

Set your multimeter to the diode test mode and measure the voltage drops to ground on pins 6, 7, 8, 12, 25, 28, 29, 30, 34, 36, 37, 39, 40 of LVDS connector JEDP1 with the matrix disconnected from the board.

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

by Google Adsense [BOT] • 1 February 2024, 13:11

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

by psikus123 • 1 February 2024, 13:45
6 - 0,57V
7 - 0,60V
8 - 0,81V
12 - 7,90V
25 - 0,10V
28 - 0,10V
29 - 0,45V
30 - 0,45V
34 - OP
36 - 0,46V
37 - 0,46V
39 - 0,60
40 - 0,60V

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

by matic • 4 February 2024, 13:43
psikus123 wrote:12 - 7,90V
Is this measurement correct?

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

by psikus123 • 5 February 2024, 08:39
Masz rację, błąd w pisowni
12 - 0,79V

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

by psikus123 • 7 February 2024, 10:07
Koledzy jeszcze ktoś ma jakiś pomysł?

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

by matic • 7 February 2024, 10:30
Remove the chip UX1 from the board and measure the voltage drop to ground on pad 4 on the place of this chip.

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

by psikus123 • 7 February 2024, 10:39
Dziękuję matic za dalsze chęci.
Nie dodałem wcześniej ale to chyba mało istotne na tym etapie, że UX1 mam cały czas zdjęty z płyty.
Jak dobrze liczę pin-out na foto.
Image

4- 0,53V
5 - 0,35V

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

by matic • 7 February 2024, 21:39
psikus123 wrote:Jak dobrze liczę pin-out na foto.
Yes, your pinout is correct.

Open the jumper PJ302 and check if the voltage appears on coil PL301 (maybe only for a short time after connecting the power supply to the board).

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

by psikus123 • 8 February 2024, 11:24
Po rozpięciu PJ302 na PL301 pojawia się napięcie poniżej 0,02V i pływa od 0,00V do 0,02V.

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

by matic • 8 February 2024, 11:37
The communication between KBC and PCH chip is missing.
Possible causes:
- Corrupted KBC chip firmware.
- Damaged KBC chip.
- Damaged PCH chip.

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

by Google Adsense [BOT] • 8 February 2024, 11:37
 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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