Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White.

3179 Questions View all

Antenna Connection has GND Contact

Hello,

i have a little big problem. The Antenna has a connection from the speaker to the logic board. The connection on the logic board is shown here: http://thumbs.ebaystatic.com/d/l225/m/mU...

My problem is that this line has contact to GND when i test it with my voltmeter. But i don't think that its correct, because normally the outer things, like the ring of the antenna connection cable is contacted to GND and not the inner golden dot.

Does anyone know why its contacted to GND? Because of this i have always "Searching.../No Service"

Thanks,

Christian

Answered! View the answer I have this problem too

Is this a good question?

Score 0

Comments:

I am confused. The outer ring should have ground...."The Antenna has a connection from the speaker to the logic board. " where do you see this?

by

Add a comment

1 Answer

Chosen Solution

chisaw234,I am confused. The outer ring should have ground...."The Antenna has a connection from the speaker to the logic board. " show us where you see this.

Block Image

Block Image

Was this answer helpful?

Score 1

Comments:

Thank you very much for the pictures. My problem is that the browm/gold dot in the connector, which is line 1 in the bottom picture, seems to be connected to ground on my logic board.

Like if the capacitor C95_RF would have a short circuit. (the blue coil isn't there anymore, because i made a solder bridge there, because i thought it was damaged).

I ask me, where the short circuit could be, but at least the bottom picture is a nice help. Maybe someone as a suggestion?

by

The capacitor will let ground pass. So I do not think this is your issue at all. Check your components a little further down the line. You replaced the inductor,and it did not change anything, therefore it appears as if your issue is further down the line. Check along the other connectors. I seem to remember there is an issue with a component that is located between the two antenna conectors.

by

Thank you for your good answers! So, you mean the two antenna connectors J2_RF and J9_RF? Ok, then i will check both capacitors if there is a short circuit. Or do you mean with down the line somewhere else?

Greetings from Germany,

Christian

by

By down the line, I would check the other components, check visually to make sure they are A: there and B; not looking burned etc. You did not tell us if anything happened to the phone prior to the "no Service " issue. Besides bridging the inductor, what else have you tried?

by

After someone changed the display (before i got it) there were no signal. The iPhone says always "Searching.." and then "No Service" and after a few seconds "Searching" and "No Service" and so on. So i thought some screw is loosen and disassembled it and rebuild it again carefully (already did this a few times on other iPhones, where i changed the screen and never had problems). So then i saw that the connecotr J9_RF was a little bit broken. One quarter of the outer ring was torn and bent down. But i bent it up again with a screwdriver. Then i replaced the metal contact under the battery contact, which connects the antenna with the backcover. But again the same with Searching/No Service. So i looked up in the internet and there a lot of people had a problem with the blue inductor. So i removed it (because maybe it was damaged) and did a short circuit there. But again Searching/No Service. Then i measured with my volt meter and found out that the inner brown dot and the full line has direct contact to ground.

by

Show 5 more comments

Add a comment

Add your answer

chisaw234 will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 4

Past 30 Days: 5

All Time: 313