Galaxy S2 i9100 Data usb faulty. - GSM-Forum

seraser · 02-24-2013, 21:12

Hello.

I have one problem with this phone.

First, do not charge and is not recogniced by Windows.

Opened and cleaned oxid with one by-pass the phone charge the battery perfectly.

But one problem, if I conect the charger or an usb adapter the phone is always on MPT mode and Windows can not recogniced it and D- and D+ are in shortcut, if I do not connect anything D- and D+ are not in shortcut.

Is the 6pin IC U502?

Can solve this only with replace the little board or can be a problem with U504?

Thank you very much.

seraser · 02-24-2013, 21:56

I can not edit the post.

Only one correction, D- and D+ only are shorted with ac adaptor, this is fine.

But If I charge the phone with an AC adaptor the system show Charging(USB) and go to MPT mode but Windows can not recognice the phone.

If I charge the phone with the computer D- and D+ are not shorted go to MPT mode but Windows can not recognice the phone.

Thank you.

rnld989 · 02-24-2013, 22:13

brother,, try changing that charging cable,, spare is available

knap · 02-24-2013, 22:18

I also have this same problem in a galaxy s2.

In practice the phone with usb cable charging, comes in MTP mode, but is not recognized by windows ...

Is not recognized in Download Mode by Odin and then you can not send anyone Firmware ....

Help me ...

knap · 02-24-2013, 22:28

Tomorrow I will try to change U504 and
New USB Charging Plate Mother

and I tell you if I solve in this way ....

seraser · 02-24-2013, 22:29

Ok Knap, thank you very much, you first can test only with USB Charging Plate Mother, maybe only is broken U502.

Thank you, really.

seraser · 02-25-2013, 18:00

Hello.

Solved, clean and press to much over the connector of the USB Charging Plate Mother and working fine.

knap · 02-25-2013, 22:20

Fixed with change new tab USB Charging ...

All working and Tested !!!

Work 100%

seraser · 02-25-2013, 22:24

Thank you knap, I too go change the USB board because if I no press over the connector the phone fail again.

Best regards.

knap · 02-25-2013, 23:26

No You do not have to force the connector Flex USB ... It is very delicate ...

I have replaced 2 times unsoldered from other motherboards and welded on the motherboard in question on which I carried out the repair.

With the 1st New Connector USB charging not work.

Now with the 2nd New USB charging connector everything works 100%.

Genuine Parts East (China) ...

I also made the change Firmware via Odin ... 100%'s Work

Best regards.

02-24-2013, 21:56	#2 (permalink)
seraser Junior Member Join Date: Oct 2010 Posts: 10 Member: 1419056 Status: Offline Thanks Meter: 6	I can not edit the post. Only one correction, D- and D+ only are shorted with ac adaptor, this is fine. But If I charge the phone with an AC adaptor the system show Charging(USB) and go to MPT mode but Windows can not recognice the phone. If I charge the phone with the computer D- and D+ are not shorted go to MPT mode but Windows can not recognice the phone. Thank you.

02-24-2013, 22:13	#3 (permalink)
rnld989 Insane Poster Join Date: Feb 2012 Location: working table Posts: 74 Member: 1717317 Status: Offline Sonork: zxcvb123 Thanks Meter: 16	brother,, try changing that charging cable,, spare is available

02-24-2013, 22:18	#4 (permalink)
knap Major Poster Join Date: Nov 2012 Posts: 43 Member: 1843401 Status: Offline Thanks Meter: 12	I also have this same problem in a galaxy s2. In practice the phone with usb cable charging, comes in MTP mode, but is not recognized by windows ... Is not recognized in Download Mode by Odin and then you can not send anyone Firmware .... Help me ...

02-24-2013, 22:28	#5 (permalink)
knap Major Poster Join Date: Nov 2012 Posts: 43 Member: 1843401 Status: Offline Thanks Meter: 12	Tomorrow I will try to change U504 and New USB Charging Plate Mother and I tell you if I solve in this way ....

02-24-2013, 22:29	#6 (permalink)
seraser Junior Member Join Date: Oct 2010 Posts: 10 Member: 1419056 Status: Offline Thanks Meter: 6	Ok Knap, thank you very much, you first can test only with USB Charging Plate Mother, maybe only is broken U502. Thank you, really.

02-25-2013, 22:20	#8 (permalink)
knap Major Poster Join Date: Nov 2012 Posts: 43 Member: 1843401 Status: Offline Thanks Meter: 12	Fixed with change new tab USB Charging ... All working and Tested !!! Work 100%

02-25-2013, 22:24	#9 (permalink)
seraser Junior Member Join Date: Oct 2010 Posts: 10 Member: 1419056 Status: Offline Thanks Meter: 6	Thank you knap, I too go change the USB board because if I no press over the connector the phone fail again. Best regards.

02-25-2013, 23:26	#10 (permalink)
knap Major Poster Join Date: Nov 2012 Posts: 43 Member: 1843401 Status: Offline Thanks Meter: 12	No You do not have to force the connector Flex USB ... It is very delicate ... I have replaced 2 times unsoldered from other motherboards and welded on the motherboard in question on which I carried out the repair. With the 1st New Connector USB charging not work. Now with the 2nd New USB charging connector everything works 100%. Genuine Parts East (China) ... I also made the change Firmware via Odin ... 100%'s Work Best regards.