iPhone 3gs Power I.C. replacement (Process How To...) - GSM-Forum

maui_1856 · 02-19-2011, 12:46

Case:

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:

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

it-repair · 02-19-2011, 12:53

good work!

tell me. If you use only new pmic or used one. I have always problems to remove the old glue on the chip for new reballing. Can you tell me please?

BR

maui_1856 · 02-19-2011, 12:59

Quote:

Originally Posted by it-repair

good work!

tell me. If you use only new pmic or used one. I have always problems to remove the old glue on the chip for new reballing. Can you tell me please?

BR

Actually the 2 photos i remove showing the new ic, but since only 10 photos allowed i remove it...

HERE:

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...

That's the 1st and 2nd steps...

BR

it-repair · 02-19-2011, 13:14

Quote:

Originally Posted by maui_1856

Actually the 2 photos i remove showing the new ic, but since only 10 photos allowed i remove it...

HERE:

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...

That's the 1st and 2nd steps...

BR

Ok, you use new IC, thats i want to know.. thanks.

But i have only used PMIC here, and there ist the old black glue around these IC contacts. How to remove this glue, without destroy the PMIC?

maui_1856 · 02-19-2011, 13:25

Quote:

Originally Posted by it-repair

Ok, you use new IC, thats i want to know.. thanks.

But i have only used PMIC here, and there ist the old black glue around these IC contacts. How to remove this glue, without destroy the PMIC?

You need to introduce mild heat to remove it... just mount in a plate that ic wont move while you heated it and scratch with flat tools or what your convenient tools to used..

I saw your video regarding removal of ic using infrared too... i've used it too but my eyes have problem seeing bright light...

BR

chapster · 02-20-2011, 21:40

Where can the replacement PM ICs be purchased, and how much?

My 3GS had failed battery. After replacement, the new battery drains very quickly. When put on charge, it shows charging symbol, but battery doesn't charge at all. Sometimes when using USB lead or mains charger, the symbol goes straight to the plug symbol, meaning fully charged, even though battery is totally dead and cannot charge it.

Bomber · 02-20-2011, 21:57

yes, where the hell these damn power ic's are sold
can't find a place to purchase

maui_1856 · 02-21-2011, 05:31

I'm trying to reach our supplier but no answer yet anyway i try again and PM me those are interested so that we can order 1 time... we got our stuff from china...

BR

vlmobiles · 02-21-2011, 05:39

Very good work brother

its use for all

THANKS

yobb · 02-22-2011, 11:41

Quote:

Originally Posted by Bomber

yes, where the hell these damn power ic's are sold
can't find a place to purchase

Surf in this site Manufacturers, Suppliers, Exporters & Importers from the world's largest online B2B marketplace-Alibaba.com and look for a trusted supplier.. Check its feedback..

yobb · 02-22-2011, 11:56

Or directly HERE. Post feedback if you anyone have transactions.

Risk: 3 out of 10 is good

chapster · 02-24-2011, 00:05

These ICs are very expensive, especially since they are only power management ones. I wonder why they cost so much. Usually China is very cheap for spares, as long as you can get them to send by airmail instead of highly expensive UPS couriers.

chtimily · 02-24-2011, 08:33

i can see on photos that a hotair station is used to unsolder the old IC,
can you pls detail how the new IC is soldered? is it with hotair station? how is the IC compressed on the board when soldering?
Please give some details on the crucial step

Thank you for this very nice tutorial.

chtimily · 02-25-2011, 10:32

Is it possible to replace 338S0533 pmic with 338S0768-AE pmic?

rifziyad · 03-03-2011, 19:46

PMIC 338S0768-AE or PMIC 338S0533-AE.
is this both ics are same?

02-19-2011, 12:46	#1 (permalink)
maui_1856 Freak Poster Join Date: May 2005 Location: Brunei Posts: 110 Member: 145396 Status: Offline Thanks Meter: 218	iPhone 3gs Power I.C. replacement (Process How To...) Case: 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: 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

02-19-2011, 12:53	#2 (permalink)
it-repair Freak Poster Join Date: Nov 2010 Location: Earth and around Posts: 325 Member: 1442842 Status: Offline Thanks Meter: 103	Good Work! good work! tell me. If you use only new pmic or used one. I have always problems to remove the old glue on the chip for new reballing. Can you tell me please? BR

03-03-2011, 19:46	#15 (permalink)
rifziyad Freak Poster Join Date: Sep 2002 Location: K S A Age: 41 Posts: 257 Member: 15539 Status: Offline Thanks Meter: 100	power ic PMIC 338S0768-AE or PMIC 338S0533-AE. is this both ics are same?

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02-20-2011, 21:40	#6 (permalink)
chapster Insane Poster Join Date: Jul 2009 Posts: 86 Member: 1086977 Status: Offline Thanks Meter: 50	Where can the replacement PM ICs be purchased, and how much? My 3GS had failed battery. After replacement, the new battery drains very quickly. When put on charge, it shows charging symbol, but battery doesn't charge at all. Sometimes when using USB lead or mains charger, the symbol goes straight to the plug symbol, meaning fully charged, even though battery is totally dead and cannot charge it.

02-20-2011, 21:57	#7 (permalink)
Bomber No Life Poster Join Date: Jul 2000 Location: hiroshima Age: 50 Posts: 878 Member: 1756 Status: Offline Thanks Meter: 9	yes, where the hell these damn power ic's are sold can't find a place to purchase

02-21-2011, 05:31	#8 (permalink)
maui_1856 Freak Poster Join Date: May 2005 Location: Brunei Posts: 110 Member: 145396 Status: Offline Thanks Meter: 218	I'm trying to reach our supplier but no answer yet anyway i try again and PM me those are interested so that we can order 1 time... we got our stuff from china... BR

02-21-2011, 05:39	#9 (permalink)
vlmobiles Freak Poster Join Date: Aug 2007 Posts: 428 Member: 560942 Status: Offline Thanks Meter: 78	Very good work brother its use for all THANKS

02-22-2011, 11:56	#11 (permalink)
yobb No Life Poster Join Date: Aug 2006 Posts: 1,133 Member: 337450 Status: Offline Thanks Meter: 718	Or directly HERE. Post feedback if you anyone have transactions. Risk: 3 out of 10 is good

02-24-2011, 00:05	#12 (permalink)
chapster Insane Poster Join Date: Jul 2009 Posts: 86 Member: 1086977 Status: Offline Thanks Meter: 50	These ICs are very expensive, especially since they are only power management ones. I wonder why they cost so much. Usually China is very cheap for spares, as long as you can get them to send by airmail instead of highly expensive UPS couriers.

02-24-2011, 08:33	#13 (permalink)
chtimily Junior Member Join Date: Nov 2010 Posts: 6 Member: 1435402 Status: Offline Thanks Meter: 0	i can see on photos that a hotair station is used to unsolder the old IC, can you pls detail how the new IC is soldered? is it with hotair station? how is the IC compressed on the board when soldering? Please give some details on the crucial step Thank you for this very nice tutorial.

02-25-2011, 10:32	#14 (permalink)
chtimily Junior Member Join Date: Nov 2010 Posts: 6 Member: 1435402 Status: Offline Thanks Meter: 0	Is it possible to replace 338S0533 pmic with 338S0768-AE pmic?