Iphone4 Mic Not Working Thread..... - Page 2 - GSM-Forum

richsea · 10-27-2010, 03:16

Quote:

Originally Posted by yehndrahcir

i also tried it 3 or 4times just only today this problem i make reset,erase all content.restore but the problem still there when you check recording mic is working but when you make call its not working i even also change the mic flex cable but its the same problem..if anybody have solution to this problem please share it here

I think till now nobody have solution to solve this problem completely. Many iPhone 4 have this problem!

francis1986 · 10-27-2010, 14:02

Solution exists, re-ball the IC marked in the image attached. But guys be careful because there are several glued components on the other side of the PCB. Make sure to use shield cover for the CPU (A4) and adjust the SMD Rework station Temperature.

Remember* It a a nano BGA IC. First find a reballing stencil.

This is 100% working solution!!

Cheers,

Francis Rodrigues

smorbe · 10-27-2010, 14:18

Quote:

Originally Posted by francis1986

Solution exists, re-ball the IC marked in the image attached. But guys be careful because there are several glued components on the other side of the PCB. Make sure to use shield cover for the CPU (A4) and adjust the SMD Rework station Temperature.

Remember* It a a nano BGA IC. First find a reballing stencil.

This is 100% working solution!!

Cheers,

Francis Rodrigues

what is the diff from reballs?..it means this can be fix also by re-hot?

alexlaboratory · 10-28-2010, 01:17

Did someone try replacing this

Br
Alex

richsea · 10-28-2010, 04:08

Quote:

Originally Posted by francis1986

Solution exists, re-ball the IC marked in the image attached. But guys be careful because there are several glued components on the other side of the PCB. Make sure to use shield cover for the CPU (A4) and adjust the SMD Rework station Temperature.

Remember* It a a nano BGA IC. First find a reballing stencil.

This is 100% working solution!!

Cheers,

Francis Rodrigues

Thank for ur sharing, let's me try with my iP! Wait for my result!

alexlaboratory · 10-28-2010, 07:30

Quote:

Originally Posted by francis1986

Solution exists, re-ball the IC marked in the image attached. But guys be careful because there are several glued components on the other side of the PCB. Make sure to use shield cover for the CPU (A4) and adjust the SMD Rework station Temperature.

Remember* It a a nano BGA IC. First find a reballing stencil.

This is 100% working solution!!

Cheers,

Francis Rodrigues

the re-flow and re-balling of this ic done by someone with no uBGA expirience may not actually fix the problem but cause more issues.

it's a very sensitive task i recomend if you are a nubie do not attempt this.

.:SUBRATA:. · 10-30-2010, 07:25

So guyz, any successful report to this problem ? i m having same problem. it works sometime sometime not.

still can record voice as usual. but no voice on call.

mp3 · 10-30-2010, 08:42

in my experienced I think this is the hardware issue because even how many times we changed a good assembly the problem still exist.

mp3 · 10-30-2010, 08:46

Quote:

Originally Posted by francis1986

Solution exists, re-ball the IC marked in the image attached. But guys be careful because there are several glued components on the other side of the PCB. Make sure to use shield cover for the CPU (A4) and adjust the SMD Rework station Temperature.

Remember* It a a nano BGA IC. First find a reballing stencil.

This is 100% working solution!!

Cheers,

Francis Rodrigues

I also tried to reheat this IC but no luck, probably reballing can help but it needs good timing and precision in removing this one.

francis1986 · 10-30-2010, 12:01

I am solving this issue on daly basis. It is a underfilled smd IC, re-heat will not solve the issue. Re-balling is the only solution. Once I get time, will post a video of the complete process.

Cheers,

Francis Rodrigues

.:SUBRATA:. · 10-30-2010, 14:33

Quote:

Originally Posted by francis1986

I am solving this issue on daly basis. It is a underfilled smd IC, re-heat will not solve the issue. Re-balling is the only solution. Once I get time, will post a video of the complete process.

Cheers,

Francis Rodrigues

Hi, it might sound dumb, but how u remove glue ?

if possible post a tutorial, so i can Transfer this task to my hardware table.

mp3 · 10-30-2010, 19:44

Quote:

Originally Posted by francis1986

I am solving this issue on daly basis. It is a underfilled smd IC, re-heat will not solve the issue. Re-balling is the only solution. Once I get time, will post a video of the complete process.

Cheers,

Francis Rodrigues

removing glued ic's is not an easy task, in my experienced out of 10 ic's removed only 3 or 4 are working after reballs.
Anyway, im hoping you can post ur videos here so that we can cement the possible solution for this one.

Best regards,
Mp3

francis1986 · 10-31-2010, 11:56

Quote:

Originally Posted by .:SUBRATA:.

Hi, it might sound dumb, but how u remove glue ?

if possible post a tutorial, so i can Transfer this task to my hardware table.

Here is the tutorial PART1 and PART2

Make the thread STICKY if you like it

Cheers,

Francis Rodrigues

.:SUBRATA:. · 11-01-2010, 09:09

Quote:

Originally Posted by francis1986

Here is the tutorial PART1 and PART2

Make the thread STICKY if you like it

Cheers,

Francis Rodrigues

Excellent tutorial, but my man afraid to do so. as its a bit risky for him

Anyway thanks for tuto

rr · 11-01-2010, 10:38

Quote:

Originally Posted by francis1986

Here is the tutorial PART1 and PART2

Make the thread STICKY if you like it

Cheers,

Francis Rodrigues

Hello!
Thx for your research!!!
10000 % working solution !
WBR !

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10-28-2010, 01:17	#19 (permalink)
alexlaboratory No Life Poster Join Date: May 2008 Location: Hell and beyond Posts: 914 Member: 771230 Status: Offline Thanks Meter: 773	Did someone try replacing this Br Alex

10-30-2010, 07:25	#22 (permalink)
.:SUBRATA:. No Life Poster Join Date: Jul 2006 Location: Bangladesh Age: 42 Posts: 5,925 Member: 319447 Status: Offline Thanks Meter: 4,949	So guyz, any successful report to this problem ? i m having same problem. it works sometime sometime not. still can record voice as usual. but no voice on call.

10-30-2010, 08:42	#23 (permalink)
mp3 Freak Poster Join Date: Aug 2005 Location: "Proudly Pinoy" Posts: 147 Member: 166929 Status: Offline Sonork: 1675060:mp3 Thanks Meter: 84	in my experienced I think this is the hardware issue because even how many times we changed a good assembly the problem still exist.

10-30-2010, 12:01	#25 (permalink)
francis1986 Registered User Join Date: Aug 2006 Location: Dubai U.A.E. Posts: 218 Member: 324136 Status: Offline Thanks Meter: 99	I am solving this issue on daly basis. It is a underfilled smd IC, re-heat will not solve the issue. Re-balling is the only solution. Once I get time, will post a video of the complete process. Cheers, Francis Rodrigues