• Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

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Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
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#1 Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by adysowski • 20 June 2023, 16:44
Witam, jak w tytule - laptop uszkodzony przez ciecz, do czasu wyładowania się wg. poprzedniego właściciela był w pełni sprawny. Brak zalania na laminacie poza okolicami układu PU300, wypalone trzy ścieżki - nr 1, 2 i 3. Po rekonstrukcji ścieżek i wlutowaniu tego samego układu laptop nadal nie ładuje się. Czekam na układ i wymieniam, czy coś jeszcze warto sprawdzić? Oporności na CPU, RAM, PCH są w porządku. Pozdrawiam.

Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by Google Adsense [BOT] • 20 June 2023, 16:44

#2 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by Vogelek23 • 20 June 2023, 21:41
Proszę zmierzyć rezystancję pomiędzy pinami 1 i 2 układu PU300.

#3 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by adysowski • 20 June 2023, 23:02
Wlutowany w płytę 700Ω.

#4 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by Vogelek23 • 22 June 2023, 05:06
adysowski wrote:700Ω
Zmierz rezystancję pomiędzy pinem 1 PU300 a dowolnym padem PR304, oraz pomiędzy pinem 2 PU300 a dowolnym padem PR304. Najprawdopodobniej jeden z rezystorów PR323 (2,2Ω) lub PR324 (2,2Ω) jest uszkodzony. Pomiędzy pinami 1 i 2 układu PU300 powinieneś mieć rezystancję 4,4Ω (suma wartości PR323 i PR324).

#5 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by adysowski • 27 June 2023, 21:46
Po wymianie układu PU300 jak i drobnicy wokół niego - PR324 i PR323 rezystancja pomiędzy pinami 1 i 2 układu PU300 jest poprawna - 4.5Ω. Niestety laptop dalej nie ładuje ani nie uruchamia się, zwarcia w B+ nie ma, 19.5V wchodzi na płytę.

#6 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by matic • 29 June 2023, 08:05
Measure the voltages to ground on pins 1, 3, 4, 8, 12, 14, 15, 16, 17, 18, 19, 24, 25 of chip PU300 with the power supply connected only (without battery).

#7 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by adysowski • 29 June 2023, 21:35
Pomiary układu PU300:
1 - 1,2V skacze do 0
2- 1,2V skacze do 0,5V i spowrotem do 1,2V
3- 1,4V do 1-5V
4- spada od 5V do 0
5 - 0
6 - 0
7 - 0
8 - 5,3V
9 - 0
10 -0
11 -0
12 - 5V
13 - 0
14 - 19,5V
15 - 19,5V
16 - 19,5V
17 - 19,5V
18 - 5,3V
19 - 3,8V
20 - 0
21 - 0
22 - 0
23 - 0
24 - 0,03V
25 - 0,12V
26-0
27-0
28-0
29-0
30-0
31-0
32-0

Dziękuję za pomoc.

#8 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by matic • 3 July 2023, 08:27
- Measure the voltages to ground on pins 1, 4, 8 of transistors PQ100, PQ108 with the power supply connected to the port JUSBC1.
- Measure the voltage to ground on pin 5 of chip PU101.

#9 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by adysowski • 3 July 2023, 19:25
Podpięty zasilacz do JUSBC1
PQ100 - pin 1,2,3 - 19.9V, pin 4 - 1.8V, pin 5 - 19.9V
PQ108 - pin 1 - 19.6V, pin 2 - 1.8V

PU101 - pin 5 - 3.3V, pin 1 - 20V, pin 3 - 0.3V, pin 4 - 9.5V

Thanks for help :)

#10 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by matic • 4 July 2023, 08:38
Measure the resistance to ground on coil PL301 and on any pin of resistor PR304.

#11 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by adysowski • 4 July 2023, 19:33
Resistance
Ground to PR304 - 345 Ω
Ground to PL301 - 9.9k Ω

Thanks

#12 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by Machine • 5 July 2023, 08:22
Ground to PR304 - 345 Ω

Value too low. Desolder PL500, PL502, PL600, PL700, PL800, PL900, PL1101, PL1102, PL1106, PL1108, PL1400, PL1402, PL1500, PL1502 one at a time and re-measure the resistance to ground on PR304. Communicate the abbreviation of the PL removed which increased the resistance on PR304.

#13 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by adysowski • 7 July 2023, 14:42
After desoldering all of this coils u mentioned nothing has changed at the PR304 resistor, still range of measurement is about 350-380Ω, how much Ω should be on this resistor? Thanks for help :) Also in this mobo there is no PU1500 and PU1501 IC's, they (and their coils) are missing from factory.

#15 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by matic • 7 July 2023, 15:17
adysowski wrote:how much Ω should be on this resistor?
The correct resistance to ground on this resistor should be in the kΩ or even MΩ range.

Perform a short circuit test described here on any pin of resistor PR304.
For a short circuit test limit the voltage to 19V.

#16 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by adysowski • 7 July 2023, 15:47
matic wrote:
adysowski wrote:how much Ω should be on this resistor?
The correct resistance to ground on this resistor should be in the kΩ or even MΩ range.

Perform a short circuit test described here on any pin of resistor PR304.
For a short circuit test limit the voltage to 19V.



I found PC322 to be shorted. I Have desoldered it and now there is reading of almost 2MΩ on PR304. Should this motherboard work "standalone" without KBCB and battery? I mean should it turn on at least for a moment when there is only charger plugged in?

#17 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by matic • 7 July 2023, 15:51
adysowski wrote:without KBCB
What exactly do you mean by "KBCB"?

#18 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by adysowski • 7 July 2023, 15:53
There is a connector labeled KBCB (on boardview JKB1), there is a ribbon flex cable to plug in to small daughterboard that is connected to Keyboard and touchpad.

#19 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by matic • 7 July 2023, 15:58
adysowski wrote:Should this motherboard work "standalone" without KBCB and battery?
Yes, it should.

#20 Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by adysowski • 7 July 2023, 16:20
Okay, so i replaced the shorted PC322 component, but board still doesn't turn on. What should i check? Voltage on PR304 is 0V.

Re: Dell XPS 13 9370 CAZ60 LA-E671P zalany, brak ładowania

by Google Adsense [BOT] • 7 July 2023, 16:20
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