주요 콘텐츠로 건너뛰기

10.1" tablet released in February 2014, powered by a custom version of Android 4.4 KitKat, and identified by model number: SM-T520NZKAXAR

35 질문 전체 보기

Won't turn on, won't charge battery

Hello! I open this topic becouse I think this is a diferent problem from the other topics.

I try to fix a SM-T 520 how won't turn on. I replace the USB charge flex cable but it Still not working. With multimeter it is possible mensure 5,4V in one diodo in motherboard when it plug to charger (the current arrives to motherboard) , but in the battery plug pin's arrives only 0,2V how it's not enought to charge battery. The battery shows 3,7V and I think it's not enought to turn on the device. Next week I will try to connect to a variable power supply to know if is a battery problem but I don't beleave. I try every possible reset solution but it don't turn on and it don't show's any led light when it plug to charge. Thank you

Update (10/04/2015)

Block Image

Picture from the motherboard

Update (10/05/2015)

Block Image

Another picture from the motherboard.

답변되었습니다! 답변 보기 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

점수 2
댓글 3개

Good picture but it shows only part of the board. For the charging circuit we need to see the rest of it as well.

Its further to the left under an EMI shield :-)

댓글 달기

답변 1개

선택된 답변

rubenmplopes, just because you got some 5.4V on a random diode, does not mean that your charge connector is working. I would suggest that you measure on the connector itself. If you only got 0.2V on the battery connector and if your charging port shows the proper voltage on the pins, then you do want to check the power management IC as well as other components on your charging circuit.

Block Image

Update (10/04/2015)

Use this guide to add images.

Block Image

해당 답변은 도움이 되었습니까?

점수 1

댓글 5개:

Thank you for your answer. I allready check the charger cable how plug to motherboard and somewhere in the ribbon cable I mensure 5.4V. Next step is find the power manager IC... I can't find any motherboard schematic on web... Another thing I forgot to tell is the tablet works fine untill battery drained. After it don't charge and don't shows any signal.

"untill battery drained" sounds like either a bad battery or bad PMIC. Post some good pictures of your logicboard with your question, that way we can identify a few parts for you.

You can see the picture from the motherboard

I post another photo

Hello oldturkey03 did you find any solution? Thank you

댓글 달기

귀하의 답변을 추가하세요

Ruben Lopes 님은 대단히 고마워 할 것입니다.
조회 통계:

24 시간 전: 1

7일 전: 8

30일 전: 11

전체 시간: 2,459