Seeking bypass solution for i9100T with broken RF switch - GSM-Forum

mrpld · 07-24-2014, 04:28

Client handed me a phone for screen repair - after repair, very poor signal.

Seems the client tried plugging in an external antenna in to the Galaxy S2 / i9100T and subsequently the internal antenna now is disabled.

Reception is good with a 90mm length of wire plugged in to the RF socket, but that obviously isn't a solution.

Is there a bypass / link I can solder on to get around this broken RF socket?

mrpld · 07-24-2014, 04:46

Based on this datasheet, if I can actually remove the device I should be able to simply short the two internal pads.... getting it off thus far however has been less than successful, even with preheating, hotair and low-temp-solder.

http://www.farnell.com/datasheets/58824.pdf

mrpld · 07-24-2014, 05:19

All fixed. Had to push the hot air to 360'C, which is more than I usually deal with.

Single 0R 0603 SMD resistor used to bridge the two inner pads left after removing the antenna test socket

07-24-2014, 04:28	#1 (permalink)
mrpld Freak Poster Join Date: Sep 2012 Location: Australia Posts: 203 Member: 1817312 Status: Offline Thanks Meter: 13	Seeking bypass solution for i9100T with broken RF switch Client handed me a phone for screen repair - after repair, very poor signal. Seems the client tried plugging in an external antenna in to the Galaxy S2 / i9100T and subsequently the internal antenna now is disabled. Reception is good with a 90mm length of wire plugged in to the RF socket, but that obviously isn't a solution. Is there a bypass / link I can solder on to get around this broken RF socket?

07-24-2014, 04:46	#2 (permalink)
mrpld Freak Poster Join Date: Sep 2012 Location: Australia Posts: 203 Member: 1817312 Status: Offline Thanks Meter: 13	Based on this datasheet, if I can actually remove the device I should be able to simply short the two internal pads.... getting it off thus far however has been less than successful, even with preheating, hotair and low-temp-solder. http://www.farnell.com/datasheets/58824.pdf

07-24-2014, 05:19	#3 (permalink)
mrpld Freak Poster Join Date: Sep 2012 Location: Australia Posts: 203 Member: 1817312 Status: Offline Thanks Meter: 13	All fixed. Had to push the hot air to 360'C, which is more than I usually deal with. Single 0R 0603 SMD resistor used to bridge the two inner pads left after removing the antenna test socket