Please help me identify these two missing IC chips?

Question

iPhone 4S

Quinta generacion de iPhone. La reparación de este dispositivo es fácil y requiere destornilladores, herramientas de hacer palanca, y paciencia. GSM/CDMA /16, 32, o 64 GB / Negro o Blanco.

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yingwang01 @duckysaysquack

Rep: 69

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2

Publicado: 7 de jul. de 2013

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Please help me identify these two missing IC chips?

I was trying to fix my power button but instead I think I bricked my phone. I think while trying to pry out the battery I broke off two IC chips. Currently my phone keeps searching for a signal and also the power button doesn't seem to work but I'm sure the button is functioning and properly plugged in.

Please see the pics:

http://i.imgur.com/Su4YlXI.jpg?1

http://i.imgur.com/J43HqxU.jpg

http://i.imgur.com/0VnEeu3.jpg

I've searched online and it seems the top (right) is a U18_RF. Can anyone confirm this?

However I have no idea what the second (blue thing that looks like a resister) is. Can anyone help? Also where may I find these parts? Any good tips on how to resolder these on? I've done some some soldering before however just nothing this small and was wondering if there are any useful tips for tiny circuitry that I am unaware of. Thank you!

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Heres a good pic showing the area of the components you damaged, sorry to say it doesn't offer much 4S Logic Bd.

7 de jul. de 2013 - de Dan

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oldturkey03 @oldturkey03

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Publicado: 8 de jul. de 2013

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yingwang01, you got the U18_RF right. U17_RF is a SASLE1G58AA0F57 IC. The other component is U18_RF is a logic gate 74AUP1G08GF SOT891 package available right here. Here is the datasheet. U17_RF is a LGA IC and both components will require SMD soldering. This will give you a broad idea of how to solder those components. Hope this helps, good luck.

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Oldturkey03! Wow you are just...amazing! I posted on here kinda expecting people to toss around suggestions. I NEVER thought I'd get the EXACT answer nor a diagram and links to purchase! Just wow! Thank you! :)))

8 de jul. de 2013 - de yingwang01

Also might I add, where might I find the U17_RF? Thanks!

8 de jul. de 2013 - de yingwang01

yingwang01, I'll be looking out for that one. I know I've found it once before :-) Thank you for accepting my answer.

8 de jul. de 2013 - de oldturkey03

Thanks a lot Oldturkey03. I see how you got 92.5k points!

9 de jul. de 2013 - de yingwang01

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Heres a good pic showing the area of the components you damaged, sorry to say it doesn't offer much 4S Logic Bd. — Dan
Oldturkey03! Wow you are just...amazing! I posted on here kinda expecting people to toss around suggestions. I NEVER thought I'd get the EXACT answer nor a diagram and links to purchase! Just wow! Thank you! :))) — yingwang01
yingwang01, I'll be looking out for that one. I know I've found it once before :-) Thank you for accepting my answer. — oldturkey03

Vincent Monteil @vmonteil Rep: 6.9mil 31 16 20 · Answer 1 · 2013-07-08T03:52:47-07:00

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Vincent Monteil @vmonteil

Rep: 6.9mil

31

16

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Publicado: 8 de jul. de 2013

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Looks like your antenna is no longer plugged in ! Try to fix it. Mabe did you lose the antenna cable. You can own a new one @ iFixit store.

Tell ys if it worked !

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I'm pretty sure the antenna is plugged in. The open port you are probably looking at is empty. The antenna is actually under the small black clip to the bottom left of the battery. Thanks for keeping a sharp eye though :)

8 de jul. de 2013 - de yingwang01

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