Zasilacz stacji dokującej i-tec CHARGER-C112W USB C - brak napięcia

Cześć,

Mam zasilacz z urwaną wtyczką USB C. Wstawiłem na chwilę zlącze C z kabla i okazało się, że nie ładuje. Rozebrałem zasilacz.

Na wejściu mamy 230V. Mostek Gretza wydaje się sprawny. Na USB A brak 5V.
Zasilacz jest tak złożony, że nie ma jak odkręcić dużej blachy aby rozładować duży kondensator...







Proszę o pomoc

Hello!

Measure the voltage directly on the highlighted capacitor.

Skacze od 1.3-1.6V

Zdjęcia w lepszym świetle:

Measure the resistance on the same capacitor.

31 Ohm

Wylutowałem go (1000uF/25V) i posiada 1.02mF więc wydaje się ok.

Iryseq написав:31 Ohm

This resistance seems too low.
Perform a short circuit test described here on this capacitor and check which component is heating up. For a short circuit test limit the voltage to 5V.

matic написав:

Iryseq написав:31 Ohm

This resistance seems too low.
Perform a short circuit test described here on this capacitor and check which component is heating up. For a short circuit test limit the voltage to 5V.

Yes, I have big short circuit
I don't have LAB-Power Supply

Try to remove the USB Type-C module from the board and remeasure the resistance.
If the resistance does not change also remove the chips U2 and U3 one by one and check if anything changes.

matic написав:Try to remove the USB Type-C module from the board and remeasure the resistance.
If the resistance does not change also remove the chips U2 and U3 one by one and check if anything changes.

I found it! Damaged SC2151A but found this chip in network is impossible...
Short circuit is dissapeared after desoldered USBC PCB

The new chip SC2151A needs to be programmed (except if you find the pre-programmed ones).

Yes, these chips are quite hard to find.
I found them on AliExpress (item number: 1005004318785088), but the minimum order quantity is 10 pcs in addition they are pre-programmed for 45W power supply (yours is 100W).
You can contact the seller and ask for 100W chips and a smaller quantity.

matic написав:The new chip SC2151A needs to be programmed (except if you find the pre-programmed ones).

Yes, these chips are quite hard to find.
I found them on AliExpress (item number: 1005004318785088), but the minimum order quantity is 10 pcs in addition they are pre-programmed for 45W power supply (yours is 100W).
You can contact the seller and ask for 100W chips and a smaller quantity.

I can't find that thing by id. I think that will be a difficult mission to repair power supply.

I don't know, why this item can't be find by id...
However, type the phrase "SC2151AQDER" into the AliExpress search bar and you should find it.

After conversation with support of i-tec I've recevied new charger for free!!!

These chips are impossible to getting