iPhone 5 battery drain Miss composantes - GSM-Forum

homer51 · 03-10-2015, 22:50

Hello,

On an iPhone 5 i've got a problem with battery, go down in less 3 Hours, and when down impossible to charge it again.

After having a look on the board, i see that it miss somme composantes

Miss
FL 54
FL 18
C 13
C 12
L 20

my question if i replace all charge Will be Ok ? Can i jump some ?

Thanks !

gjnijenhuis · 03-12-2015, 11:02

Bro, your problem is almost certainly caused by a bad charge IC. Replace (NOT reheat/reball) U2 on the logic board and this should solve your problem.

homer51 · 03-12-2015, 11:06

Hi,

Thanks, the not present components are not important for that problem you think ? only U2 to change ?

axiom uk · 03-12-2015, 15:04

Dont listen to this guy, its not always the U2 IC, you need to get the schematics and see if any of the missing components are CRITICAL! if so you need to replace or jump (if possible).

homer51 · 03-12-2015, 17:24

Thanks that i was thinking to do before,
tell me if i'm wrong after having a look on schematics,

i must replace C12 and C13 for the other i think i can jump
L20 used for one way charge - synch

Ionel · 03-12-2015, 18:05

Change u2 ic .

homer51 · 03-12-2015, 18:21

Ok,
I have a damaged Board, can i remove U2 on it to replace it on mine ?

axiom uk · 03-12-2015, 18:24

haha, yeah change U2 IC, why not waste time and money, changing U2 IC solves all iPhone problems!!!!! lets give good advice!!!

ALWAYS CHANGE U2 IC

kaptanci · 03-12-2015, 21:33

try unplug dock connector an see if still same problem before changing any ic. i solved this prblem 3 times by changing dock.

homer51 · 03-12-2015, 21:39

in progress to replace the L20, but really boring to place and weld it.

Just unplugued the dock, i'll see if the battery drain again.

Thanks

homer51 · 03-12-2015, 23:05

Dock unplugued battery drain again .. Less 43% in 3 hours

gjnijenhuis · 03-13-2015, 12:21

Quote:

Originally Posted by axiom uk

Dont listen to this guy, its not always the U2 IC, you need to get the schematics and see if any of the missing components are CRITICAL! if so you need to replace or jump (if possible).

These missing components certainly can not cause a battery drain. Battery drain is almost always caused by U2 IC damage.

homer51 · 03-24-2015, 21:33

I remove U2 IC, wait for a new one ordered, does the iPhone can boot without it ?
Because since i remove it no boot anymore, normal ?
Just expect that i don't damage board white removing U2

Thanks

homer51 · 04-02-2015, 22:08

I've installed a new U2 IC, but now no boot any more on battery or usb, do you think that the U2 IC is damaged ? Can it cause the no boot ?

Thanks for help

homer51 · 04-13-2015, 20:53

Up !

Any idea of my black screen, no boot any more ?

03-10-2015, 22:50	#1 (permalink)
homer51 Major Poster Join Date: Mar 2008 Posts: 46 Member: 726059 Status: Offline Thanks Meter: 1	iPhone 5 battery drain Miss composantes Hello, On an iPhone 5 i've got a problem with battery, go down in less 3 Hours, and when down impossible to charge it again. After having a look on the board, i see that it miss somme composantes Miss FL 54 FL 18 C 13 C 12 L 20 my question if i replace all charge Will be Ok ? Can i jump some ? Thanks !

03-12-2015, 11:02	#2 (permalink)
gjnijenhuis Junior Member Join Date: Sep 2011 Location: Netherlands / OV / Hengelo Age: 39 Posts: 12 Member: 1648562 Status: Offline Thanks Meter: 5	Bro, your problem is almost certainly caused by a bad charge IC. Replace (NOT reheat/reball) U2 on the logic board and this should solve your problem.

03-12-2015, 11:06	#3 (permalink)
homer51 Major Poster Join Date: Mar 2008 Posts: 46 Member: 726059 Status: Offline Thanks Meter: 1	Hi, Thanks, the not present components are not important for that problem you think ? only U2 to change ?

03-12-2015, 15:04	#4 (permalink)
axiom uk Junior Member Join Date: Apr 2008 Posts: 38 Member: 747693 Status: Offline Thanks Meter: 5	Dont listen to this guy, its not always the U2 IC, you need to get the schematics and see if any of the missing components are CRITICAL! if so you need to replace or jump (if possible).

03-12-2015, 17:24	#5 (permalink)
homer51 Major Poster Join Date: Mar 2008 Posts: 46 Member: 726059 Status: Offline Thanks Meter: 1	Thanks that i was thinking to do before, tell me if i'm wrong after having a look on schematics, i must replace C12 and C13 for the other i think i can jump L20 used for one way charge - synch

03-12-2015, 18:05	#6 (permalink)
Ionel No Life Poster Join Date: Sep 2004 Location: Romania Age: 42 Posts: 1,598 Member: 81232 Status: Offline Thanks Meter: 196	Change u2 ic .

03-12-2015, 18:21	#7 (permalink)
homer51 Major Poster Join Date: Mar 2008 Posts: 46 Member: 726059 Status: Offline Thanks Meter: 1	Ok, I have a damaged Board, can i remove U2 on it to replace it on mine ?

03-12-2015, 18:24	#8 (permalink)
axiom uk Junior Member Join Date: Apr 2008 Posts: 38 Member: 747693 Status: Offline Thanks Meter: 5	haha, yeah change U2 IC, why not waste time and money, changing U2 IC solves all iPhone problems!!!!! lets give good advice!!! ALWAYS CHANGE U2 IC

03-12-2015, 21:33	#9 (permalink)
kaptanci Freak Poster Join Date: Nov 2014 Location: Germany Posts: 265 Member: 2289832 Status: Offline Thanks Meter: 48	try unplug dock connector an see if still same problem before changing any ic. i solved this prblem 3 times by changing dock.

03-12-2015, 21:39	#10 (permalink)
homer51 Major Poster Join Date: Mar 2008 Posts: 46 Member: 726059 Status: Offline Thanks Meter: 1	in progress to replace the L20, but really boring to place and weld it. Just unplugued the dock, i'll see if the battery drain again. Thanks

03-12-2015, 23:05	#11 (permalink)
homer51 Major Poster Join Date: Mar 2008 Posts: 46 Member: 726059 Status: Offline Thanks Meter: 1	Dock unplugued battery drain again .. Less 43% in 3 hours

03-24-2015, 21:33	#13 (permalink)
homer51 Major Poster Join Date: Mar 2008 Posts: 46 Member: 726059 Status: Offline Thanks Meter: 1	I remove U2 IC, wait for a new one ordered, does the iPhone can boot without it ? Because since i remove it no boot anymore, normal ? Just expect that i don't damage board white removing U2 Thanks

04-02-2015, 22:08	#14 (permalink)
homer51 Major Poster Join Date: Mar 2008 Posts: 46 Member: 726059 Status: Offline Thanks Meter: 1	I've installed a new U2 IC, but now no boot any more on battery or usb, do you think that the U2 IC is damaged ? Can it cause the no boot ? Thanks for help

04-13-2015, 20:53	#15 (permalink)
homer51 Major Poster Join Date: Mar 2008 Posts: 46 Member: 726059 Status: Offline Thanks Meter: 1	Up ! Any idea of my black screen, no boot any more ?