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Moving NAND chip from 1 board to another

by OmegaTomato / October 14, 2009 11:11 PM PDT

So, my Lexar Jumpdrive which had worked wonderfully for the last 6 or 7 years died yesterday. This was not unexpected so I have a backup of the data from about 1 month ago so I didn't lose anything critical. But, there are a few files that I'd like to try and get off there (and even if I don't succeed the challenge should be fun).

So, I got an identical flash drive and I'm planning on removing the NAND chip from the first drive and soldering it to the board of the new drive. I'm pretty sure that it's the first board that failed and not the NAND chip as no computer even detects the drive (if the NAND chip failed I'd expect the device to be detected but for there to be nothing on there).

I was essentially going to follow the procedure shown in these 2 videos: http://www.metacafe.com/watch/2189147/solder_nand_memory/ and http://www.metacafe.com/watch/2190303/desolder_nand_memory/

I don't have the "heat gun" type thing that the video used but I thought I could just use my soldering iron to heat the solder and then use my solder pump to remove it.

I only need this to work once.

Can anyone think of why this might not work and how to get around those problems? Or, can anyone think of an easier way to get my data off the old NAND chip? If someone's done this before I'd be very interested in any advice that you have to give.

Thanks.

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Should work, provided...
by Willy / October 15, 2009 2:07 AM PDT

You get the chip out w/o any damage besides physical also from heat. Its important in such operations to use the right tools. Since, you like to play you can go forward and come back with results. On the other half, use LGA socket in order to mount the ram for ease of install/removal.

tada -----Willy Happy

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Thanks
by OmegaTomato / October 15, 2009 2:27 AM PDT

Could you just explain what you meant when you said:

"On the other half, use LGA socket in order to mount the ram for ease of install/removal."

I think I just don't understand the basic principle of what you're trying to say. After Googling LGA socket I'm not sure how that would help me with what I'm doing.

Thanks for the help.

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Check out the links
by Willy / October 15, 2009 3:49 AM PDT
In reply to: Thanks

LGA = large grid array

Basically, you use it instead of resoldering the chip back on. The socket allowing for ease of install/removal. A good example if present are mtrbd. bios, provided they're not soldered on. I assume you plan to remove a NAND elsewhere that's probably soldered on or not and mount the problem chip in order to access it. Check out this supplier and others of your choosing:

http://www.jdr.com
http:/www.bgmicro.com

The socket products should give a clear example as well of what I propose you use. The other half eant where you were going to take the old chip to.

On a last thought, ever think of a test probe clip. It mounts over the trouble chip and you try to check it out, provided you know the specs, etc. to do. Yeah, this is techie stuff, look for test clips for ICs. If I really have to explain this too much, think are you capable or just gutsy. Wink

tada -----Willy Happy

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