• ASUS UX435E - zwarcie na płycie głównej

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#1 ASUS UX435E - zwarcie na płycie głównej


by daro19862 8 November 2025, 12:37
Płyta główna UX435EG zwarcie do GND miał podwójny tranzystor PQH8901 po wymianie zwarcie ustało po podłączeniu ładowarki nie przełącza na 20V cały czas jest 5V 20mA na obu gniazdach tak samo. Jakieś wskazówki naprawy?

Re: ASUS UX435E - zwarcie na płycie głównej


by Google Adsense [BOT] 8 November 2025, 12:37

#2 Re: ASUS UX435E - zwarcie na płycie głównej


by matic 8 November 2025, 12:54
Hello!

- Please specify the motherboard revision number.
- Measure the voltages directly on the capacitors C3410, C3411.

#3 Re: ASUS UX435E - zwarcie na płycie głównej


by daro19862 8 November 2025, 14:06
UX435EG R2.2
C3410- 3.258V
C3411- 1.571V
the same on both USB-C

PRS8901 - 4,6V why?

#4 Re: ASUS UX435E - zwarcie na płycie głównej


by matic 9 November 2025, 15:43
Set your multimeter to diode test mode and measure the voltage drops to ground on pins 1, 2, 3, 4, 5, 11, 12, 14, 15, 19, 20 of the chips U3403, U3404 with the positive (red) probe connected to ground.

#5 Re: ASUS UX435E - zwarcie na płycie głównej


by daro19862 9 November 2025, 16:26
U3403:
1- 0.754V
2- 0.754V
3-0,661V
4-0,753V
5-0,753V
11-0,600V
12-0,606V
14-0,620V
15-0,620V
19-0,824V
20-0,824V

U3404:
1- 0.753V
2- 0.754V
3-0,662V
4-0,752V
5-0,752V
11-0,599V
12-0,606V
14-0,749V
15-0,749V
19-0,825V
20-0,825V

#6 Re: ASUS UX435E - zwarcie na płycie głównej


by matic 10 November 2025, 08:13
- Measure the resistances directly on the capacitors C3401, C3414, C3419.
- Measure the resistance between pin 1 of capacitor C3401 and pin 1 of capacitor C3414.
- Measure the resistance between pin 1 of capacitor C3424 and pin 1 of capacitor C3414.

#7 Re: ASUS UX435E - zwarcie na płycie głównej


by daro19862 10 November 2025, 11:13
C3401 - 5,4k Ω
C3414 - 930 Ω reverse probe 840 Ω
C3419 - 5,4k Ω

resistance between pin 1 of capacitor C3401 and pin 1 of capacitor C3414 is 10k Ω and rise to 80k Ω
resistance between pin 1 of capacitor C3424 and pin 1 of capacitor C3414 is 930 Ω reverse probe 830 Ω

#8 Re: ASUS UX435E - zwarcie na płycie głównej


by daro19862 13 November 2025, 12:52
Still need help

#9 Re: ASUS UX435E - zwarcie na płycie głównej


by matic 13 November 2025, 15:50
daro19862 wrote:resistance between pin 1 of capacitor C3424 and pin 1 of capacitor C3414 is 930 Ω reverse probe 830 Ω
Sorry, my mistake.
I meant pin 1 of C3414 and pin 1 of C3419, so also please measure this resistance.

However, pin 1 of C3424 is directly connected to the pin 1 of C3414, so this resistance should be close to 0Ω, but you measured around 1kΩ. Please, check your meter.

#10 Re: ASUS UX435E - zwarcie na płycie głównej


by daro19862 13 November 2025, 18:11
Pin 1 of C3414 and pin 1 of C3419 is 80k Ω
pin 1 of C3424 and pin 1 of C3414, have 0Ω (I made a mistake earlier)

Re: ASUS UX435E - zwarcie na płycie głównej


by Google Adsense [BOT] 13 November 2025, 18:11

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