Huawei P8 Lite Charging Issue: Voltage Drop, Warm Component & Element Functionality

Question

Hello.
Huawei P8 lite, it does not charge.
Where there is 5V in the picture, I have around 2V and the element I have marked with the arrow is very warm. After its desoldering the phone is charging. The question is: what is the element responsible for?

MAXTEAM · Answer

Maybe the computer sees the phone responsible for data transmission or after desoldering this element?

adribuja · Answer

Yes. After desoldering this item, the phone normally installs itself and the computer can see it.

MAXTEAM · Answer

Does this desoldered element have any markings?

adribuja · Answer

Yes. The first line says: 12P in the second line: UT.

MAXTEAM · Answer

Nothing can be found after these signs, I just leave a tel without this element and check everything and see if something is working.
And if this phone has an OTG maybe it's just an arrangement from OTG.

adribuja · Answer

In some forum I read that probably the phone hardware has such a feature but it is apparently inactive software.

MAXTEAM · Answer

So maybe it's some kind of chip from OTG or some 5VUSB security element. If everything works on your phone, there is no problem to look for.

napster2 · Answer

Gentlemen, just like in the picture, when I touch the meter on the red pin on the micro USB socket and I give it to the mass, I hit it, so I have a short circuit plus a mass. where is the problem? I soldered the socket, I cleaned the pads nicely, nothing will help anyone?

I will add that on the red pad I do not have any voltage at the 5v socket I desoldered and there is no breakdown plus on the socket itself

plustek · Answer

The element marked with an arrow is a protection diode. If it has a short circuit, it can be desoldered.

mysterdominik · Answer

Hello,

I have a problem with p8 lite, I do not land. Changing the socket did not help with the wine of the software, it is not. I traveled everything as in the picture above and it's ok to check if there is voltage on the battery socket. Does anyone have any schematic or idea what I could check?

Added after 1 [minutes]:

I also have a p8 lite that turns on under the charger and after disconnecting it turns off.

Azemek · Answer

Also no charging.
In the points marked with the red line from 1 # I have 4.91 V.
What can I check?

Before the replacement of the broken display and touch, the charging was ok - despite the cracked touch and dark display.

Can another touch screen cause a lack of charging?

All other functions work.

Dark82 · Answer

Check if there is no shortage of the transistor next to the connector on the switch belt, often it goes to repair when, for example, someone puts the feet alone. If I find a photo, it will show.

Azemek · Answer

In addition to replacing the touch display (full set with frame) nothing else was done.

GAD666 · Answer

Hello, if the feet from plus and minus have a short circuit and are on the gauge, what a colleague earlier wrote on the top. Simply desoldering the element marked with an arrow and there will be a guitar. Recently, I did and helped.

Huawei P8 Lite Charging Issue: Voltage Drop, Warm Component & Element Functionality

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