• DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza

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#1 DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by Sasni 19 November 2023, 20:49
Cześć, proszę o pomoc w diagnozie laptopa DELL Precision 3510
Płyta główna ADP80 LA-C841P Rev. 3.0 (A02)

Laptop po drobnym zalaniu w kilku miejscach, wydaje mi się, że wszystko oczyściłem i wymieniłem, Raz włożony do obudowy mi się uruchomił, (świeciła chyba na pomarańczowo dioda baterii) następnie wymieniłem starą pastę, skręciłem ucieszony, że laptop już żyje, a tu niespodzianka.
Po podłączeniu zasilacza zaświeca się na biało dioda baterii i gaśnie.
Wciśnięcie włącznika zaświeca się na chwile dioda power, i gaśnie. Słychać delikatne syczenie / bzyczenie (wydaje mi się, że okolice gniazda zasilania (ta strona płyty).

na PJP1806 powinienem mieć ~13V ?

Sprawdziłem napięcia W stanie S4/AC Raczej wszystkie napięcia obecne i prawidłowe. Tj.
+5V_ALW
+3.3_ALW
+3.3_ALW_PCH
+RTC_CELL
+1.8V_PRIM
+1.0_PRIM

Na termowizji tuż po włączeniu, rdzenie w miarę równomiernie, jakby startowały i PU301 z drugiej strony UR2 i PU801,
PU801 to chyba on bzyczy.
Coś tu jeszcze mogę sprawdzić, aby sprecyzować źródło problemu?

Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by Google Adsense [BOT] 19 November 2023, 20:49

#2 Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by matic 20 November 2023, 12:32
Hello!

Measure the following voltages to ground in cases "a", "b".
a) Before pressing to the power button (machine turned off).
b) After pressing to the power button (for a short time, when the power LED is turned on).
- On pins 1, 2, 4 of chips UC9, UE5.
- On pins 2, 4 of chip UD1.

#3 Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by Sasni 27 November 2023, 16:20
Scenario A
UD1:
pin 2 - 0V
pin 4 - 3,36V

UC9
pin 1 - 3,39V
pin 2 - 0V
pin 4 - 0V

UE5
pin 1 - 0V
pin 2 - 0V
pin 4 - 0V

Scenario B (when press)
UD1:
pin 2 - go to ~1,2V on the moment and back to 0V
pin 4 - drop to ~2V and back to 3,3V

UC9
pin 1 - 3,39V (no change)
pin 2 - go to 3,39V and back to 0V
pin 4 - go to 3,39V and back to 0V

UE5
pin 1 - go to 3,39V and back to 0V
pin 2 - go to 3,39V and back to 0V
pin 4 - go to 3,39V and back to 0V

#4 Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by matic 27 November 2023, 22:17
Measure the voltages to ground on all coils for a short time, when the machine is turned on (power LED is turned on). You will need to turn on the machine multiple times to measure all of the voltages.

#5 Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by Sasni 29 November 2023, 17:51
PL802 - 19,8V / 19,6V
PL801 - 13,54V / 13,45V
PL101 - 5,11 / 5,11
PL100 - 3,4V / 3,4V
PL604 - 0V / 1,08V
PL603 - 0V / 1,08V
PL607 - 0V / 0V
PL608 - 0V / 0V
PL609 - 0V / 1,13V
PL201 - 0V / 1,2V
PL1901 - 0V / 0,9V
PL401 - 0V / 0,95V
PL301 - 1,01V / 1,01V
PL1303 - 0V / 0,9V
PL1301 - 0V / 0,9V
PL1600 - 0V / 1,35V

PJP602 - 13,54V
Signal PWM1_GT, PWM2_GT (n12,13 on PU601) is 0V and when i Press power button go to 2,5V
FCCM_GT (n.11 on PU601) 1,968V, when press drop to 0,01V
On PU601 n. 47 - 0V, when press go to 3,38V

#6 Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by matic 30 November 2023, 09:18
Measure the following voltages to ground in cases "a", "b".
a) Before pressing to the power button (machine turned off).
b) After pressing to the power button (for a short time, when the power LED is turned on).
- On pin 4 of chip UC4.
- On pins 2, 4 of chip UE4.

#7 Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by Sasni 30 November 2023, 13:21
UC4 - pin 4 3,39V / 3,38V
UE4
pin 2 - 0V / 3,39V
pin 4 - 0V / 0,9V

#8 Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by matic 30 November 2023, 13:27
- Measure the voltages to ground on pins 1, 2, 5 of chip UC4 in cases "a", "b".
a) Before pressing to the power button (machine turned off).
b) After pressing to the power button (for a short time, when the power LED is turned on).

#9 Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by Sasni 30 November 2023, 13:36
UC4
pin 1 - 3,39V / 3,38V
pin 2 - 3,38V / 3,38
pin 5 - 3,399V / 3,39

nothing changes.

#10 Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by matic 16 December 2023, 13:56
Please, post a clear pictures of spilled areas of the board in their current state.

Re: DELL Precision 3510 na płycie LA-C841P - Od razu się wyłącza


by Google Adsense [BOT] 16 December 2023, 13:56
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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