[Ferchica]

Finally I got parts to fix my tablet.

I soldered a cable to connect an external charger circuit and it seems to works.

I am not the best with the iron 😉 , but circuit works and it delivers  around 4.19V@1A, I expect to take longer to charge the battery but at least it is alive again

Here you have some pictures, I hope it will helps somebody

Attachments:

You must be logged in to view attached files.

[Ferchica]

Sergey first of all, thank you for your time help me with this problem.

Checking USB mode I was unable to see any voltage, multimeter show 0 V

 

[Ferchica]

I did it in OTG mode

[Ferchica]

Tablet has been a couple of days with battery unsolded, I solder it again, battery still has 3.7 V enough to show it the logo and battery low icon before it shut down again. Trough the OTG before press power button, no voltage but after press on button it shows 5.06 V without an load. Tablet still doesn’t charge the battery. I have not idea about next step

 

[Ferchica]

Thanks I will follow your suggestion and post the result

[Author]

Posts