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Repair information and guides for the iPhone 6S released by Apple on September 25, 2015. Models: A1688, A1633

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iPhone 6s - Move/migrate chips from a busted board to a new one

Hello guys, I have an Iphone 6s that was dropped on the sea, and has EXTENSIVE water damage, the board itself is a mess beyond repair. I want to know if its possible to move the key components to another board ( maybe those that you can get on ebay with bad EMEIs or ICloud locks) and maybe get the phone to work again ( using my original chips in it).

I have experience on soldering and have done some research on how to proceed ( using hot air to get the chips out, etc etc), and I think that with some trial an error I should be able to do it.

Thoughts?

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Technically speaking, this is possible. You would have to move all of the paired components over to an otherwise functional board. That would be the CPU, NAND, Baseband, EEPROM and maybe some other bits. I don't know exactly because this is not a repair I typically offer so I have not researched it fully.

Realistically speaking, this is essentially an impossible repair unless you are a very advanced micro-solderer. The CPU is a dual-layer IC (CPU/SDRAM) that has ~35x35 grid of tiny solder balls underneath a 1/2 inch x 1/2 inch die.

Considering the amount of heat you will have to blow across the logic board, this is not really a trial and error repair. You will have to try this multiple times on dead boards and then eventually on a good board to see if the process actually works electrically and digitally without blowing out solder balls all over the board. Only then do you attempt the repair.

Now, educationally speaking, this is a fantastic project and I encourage you to do it but start with smaller IC's first to get a feel for your gear and skills and move your way up. Report back too so we can all learn from it as well.

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Thanks a lot for the awesome response Minho!!

I have been doing some research, and checking out some youtube videos around it (https://www.youtube.com/watch?v=o7cA-fmH... - https://www.youtube.com/watch?v=lOEwBMjF... - Please ignore the title of the videos, I do NOT condone any type of illegal behavior at all, and my purpose is only to reuse the parts I have on a completely useless phone).

Do you have any suggestions on the type of heat blower to use for soldering? as well as the type of flux to use? I want to start with something small since I am no pro.

I will start the hunt for some dead boards on ebay so I can do some trial and error and drop by at some point once I finished my experiment to share the results.

Thanks a lot for your time!!

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You can get a low-cost Atten 858D type of station (or it's various clones) but I have never used one and it probably doesn't work that well. It should suffice for small chips but I can't say either way. If this is more than a hobby, then you might consider a Quick 861DW. I haven't used it myself but it's the one I had researched for myself and it is very highly rated. When I wanted to order it, it was very difficult and expensive to get one in Canada so I opted for a Hakko 810. In the end, it was more expensive but had local support (I am running a business after all!). You can always look for a used Hakko 802/803.

As for flux, the Amtech NC-559-V2 is popular but harder to find outside the USA. There are numerous reports of fake flux so you have to get it from a reputable source. The MG Chemicals No Clean Flux (8341) works well too and is probably easier to find.

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Leandro Filipczyk will be eternally grateful.
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