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Old 19-02-11, 05:29 PM   #1
maui_1856
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Default iPhone 3gs Power I.C. replacement (Process How To...)

Same case from HERE:

iPhone 3gs fast drained batt and getting hot if it charge...


Cause:

Mainboard shorted


Solution:

Change Power Management IC...


Here's the way how to replace IC:


Remove PM IC from MB, take extra care IC is sealed and adjust low heat settings...


Replace it with new PM IC... New IC has no lead yet, it's color gold...


Preparing for reballing leads... I'm using heat resistant tape way of resoldering...


Mounting on solder plate...


Put solder paste (lead)...


Make sure lead paste must evenly distributed to holes...


Apply low heat and lead gradually melting...


After reballs from plate must reheat IC for even and fine lead settling...


Mounting to MB, heat must controled to prevent IC/MB spoiled...


Here's new IC mounted perfectly and beside is the shorted IC...


After assemble and plug in charge... It works but still lowbatt... (noticed at photo only 5 percent batt charged and the DATE when phone was dead)



Here's after how many minutes charge is 50 percent and for documentation compare IMEI on phone and the written IMEI on reciept and the problem written...



My first success change power IC is link HERE last year...

And somebody copied HERE...



BR
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Old 22-02-11, 01:58 PM   #2
scarrypie
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Default Re: iPhone 3gs Power I.C. replacement (Process How To...)

Great work. Thanks!
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Old 10-10-11, 12:49 AM   #3
wahooza
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Default Re: iPhone 3gs Power I.C. replacement (Process How To...)

can you post a list of equipment you need? I'm going to attempt this install but not too experienced with soldering and stuff. i might ask you for detailed instructions later too...
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Old 02-11-11, 09:59 PM   #4
ffalcetta
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Default Re: iPhone 3gs Power I.C. replacement (Process How To...)

maui hi greeting.I congratulate you for your post, to see if I can help ...

1-case. iphone 3g 32gb, just turn on when I plug the power cord and stuck on the apple, remove the power cord and off, new battery 100% charged, problem of resistance will be green. that could be?.

2. case. iphone 3g 16g does not start anything. The board is very hot. specifically in the area where 6R8, 109x and power ic, if you change this power ic, could solve that problem. thank you very much waiting for prompt reply. from Spain
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