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Where are the fuses in iPhone 4s

iphone 4s will not charge after replacing battery

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thanks oldturkey03 helped heaps

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you are welcome ;-)

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Hi guys...my 4s motherboard had same problem..but i dont know where can i buy the inductor..i want to know if can i take it on iphone 4 motherboard?

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Yes you can if it has the same values.

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Merv Gower, you want to start by checking 3 inductors. For that, of course, you need a multimeter, or at least an ohm meter, to check for continuity. I hate to refer to those as fuses, but they most certainly control part of the charging circuit. First one is reference designator L3, it is a FERR-120-OHM-1.5A inductor. L4, right below it , has the identical value. Next would be the charger inductor L28 2.2UH-1.8A-155MOHM. All of these are pretty much available at mouser. com or digikey.com. Of course your issue may not be related to those, but could be caused by a bad dock connector, or a totally discharged battery. I suppose you can check the components anyway. Hope this helps, good luck.

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I looked up the inductors on the page as I am having the same problem. I read 5V on the internal cable from the charging port on my 4s. But I do not receive the 5V at the battery terminal. I would love to fix this as I have access to a 2M lab. OldTurkey, do all the inductors come the same shape as long as the specifics are the same? I know this doesn't hold true with a lot of other items. Are there anymore specifics that I can use to order the right inductor?

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@cowboyobe, L3 and L4 are a 0402 package 0.039" L x 0.023" W x 0.014" H (1.00mm x 0.58mm x 0.35mm) L28 is a TDK inductor vls252012-SM and can be matched with those at digikey or Mouser as well as many others. Physical size is 2 mm W x 2.5 mm L x 1.2 mm H. As you can see, they are not very big....Hope this helps.

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For iPhone 4S which is not getting charge even after replacing battery check out your warranty 'if you were still in warranty' when you changed the battery on your own, I suggest find a retail store which specializes in this 'area of issue' and go from there.

All the best!!!!

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Hello. Oldturkey03 talks about a completely discharged battery. Could it made that a iphone doesn´t starts to charge? Thanks

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If your battery is discharged below a certain threshold, it will not charge.

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