iPhone 7 no sound during the call (ic replaced!) - GSM-Forum

krisszmix · 10-28-2019, 00:01

Helo All !
I have a special problem, with an iphone 7.
Every speaker is working, i hear the ring, i hear the dial sound. No grey icon !

But if i get a call, no sound any speaker. Just in the call time. When the call period is end, the sounds come back.

I reballed the audio ic, i replaced twice! I reballed the two audio amplifier ic (U3402/U3502). Nothing change. I check any ic pads !

I do not have "loop disease" problem, and i do not have Gray call icon problem.
I check another Main Flex cable, but nothing change.
I put the motherboard, an another good housing, but nothing change.
I repaired many iphone 7 audio ic, but i do not heard this problem.

Can anybody give me an good idea ?

shah77777 · 10-28-2019, 06:54

is your mobile time ok?

timvandenboo · 10-28-2019, 09:03

What i found on the iphone 7 so far is that when i got this problem it originates mainly from a broken pad. Even if they "beep".

For the intel iphone 7 mainly the classic pad is broken. Which is the one close to the side. For the quallcom unit it are mainly the other 3 pads that are ripped.

Just make a jumper on them to be sure. And check again if solved.

krisszmix · 10-28-2019, 10:46

Quote:

Originally Posted by shah77777

is your mobile time ok?

Helo !
Yes, the time is ok, and i did software update with itunes, and i did factory/full reset...
Nothing change..

kwahab · 10-28-2019, 17:23

it seems ic audio u need to change it

krisszmix · 10-28-2019, 22:38

Quote:

Originally Posted by kwahab

it seems ic audio u need to change it

Helo !
But, i reballed the original ic..
And then replace an brand new ic, then replace again an new ic...
It is 3 ic. Would be bad all the 3 ic ?

timvandenboo · 10-29-2019, 09:18

Quote:

Originally Posted by krisszmix

Helo !
But, i reballed the original ic..
And then replace an brand new ic, then replace again an new ic...
It is 3 ic. Would be bad all the 3 ic ?

But did you make jumpers on pads????

krisszmix · 10-29-2019, 23:27

Quote:

Originally Posted by timvandenboo

But did you make jumpers on pads????

No, i did not make the jumpers because, before every ic replace, i check the pads with multimeter and with Zillion diode resistance value. So i make three metering, with the three ic replace. And i had three good measurements...

timvandenboo · 10-30-2019, 09:04

No harm is made when you do make a jumper.

Just a suggestion.

James-R · 04-25-2021, 22:32

Did you solve this problem?

James-R · 05-04-2021, 22:40

? thanks....................

Br

10-28-2019, 00:01	#1 (permalink)
krisszmix Junior Member Join Date: Jun 2010 Posts: 16 Member: 1319762 Status: Offline Sonork: krisszmix Thanks Meter: 2	iPhone 7 no sound during the call (ic replaced!) Helo All ! I have a special problem, with an iphone 7. Every speaker is working, i hear the ring, i hear the dial sound. No grey icon ! But if i get a call, no sound any speaker. Just in the call time. When the call period is end, the sounds come back. I reballed the audio ic, i replaced twice! I reballed the two audio amplifier ic (U3402/U3502). Nothing change. I check any ic pads ! I do not have "loop disease" problem, and i do not have Gray call icon problem. I check another Main Flex cable, but nothing change. I put the motherboard, an another good housing, but nothing change. I repaired many iphone 7 audio ic, but i do not heard this problem. Can anybody give me an good idea ?

10-28-2019, 06:54	#2 (permalink)
shah77777 Junior Member Join Date: Oct 2017 Posts: 3 Member: 2766946 Status: Offline Thanks Meter: 0	is your mobile time ok?

10-28-2019, 09:03	#3 (permalink)
timvandenboo Freak Poster Join Date: May 2013 Location: Netherlands Posts: 376 Member: 1939450 Status: Offline Thanks Meter: 165	What i found on the iphone 7 so far is that when i got this problem it originates mainly from a broken pad. Even if they "beep". For the intel iphone 7 mainly the classic pad is broken. Which is the one close to the side. For the quallcom unit it are mainly the other 3 pads that are ripped. Just make a jumper on them to be sure. And check again if solved.

10-28-2019, 17:23	#5 (permalink)
kwahab Junior Member Join Date: Dec 2013 Posts: 20 Member: 2094358 Status: Offline Thanks Meter: 2	it seems ic audio u need to change it

10-30-2019, 09:04	#9 (permalink)
timvandenboo Freak Poster Join Date: May 2013 Location: Netherlands Posts: 376 Member: 1939450 Status: Offline Thanks Meter: 165	No harm is made when you do make a jumper. Just a suggestion.

04-25-2021, 22:32	#10 (permalink)
James-R No Life Poster Join Date: Jan 2005 Age: 50 Posts: 1,678 Member: 104911 Status: Offline Thanks Meter: 42	Did you solve this problem?

05-04-2021, 22:40	#11 (permalink)
James-R No Life Poster Join Date: Jan 2005 Age: 50 Posts: 1,678 Member: 104911 Status: Offline Thanks Meter: 42	? thanks.................... Br