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OT-SD card repair?
Way OT and most likely the wrong grougp but
I have a 4 MB SD card that has physcially bit the dust. The termain end has split and broken with a number of the terminals sunk lower that the others. Would anyone have an idea how, or if, it's possib;e to bring the card back so I can backup the file that are on the card? Running W7 x64 R. Wink --- This email has been checked for viruses by AVG. http://www.avg.com |
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#2
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OT-SD card repair?
rwwink wrote:
Way OT and most likely the wrong grougp but I have a 4 MB SD card that has physcially bit the dust. The termain end has split and broken with a number of the terminals sunk lower that the others. Would anyone have an idea how, or if, it's possib;e to bring the card back so I can backup the file that are on the card? Running W7 x64 R. Wink There are data recovery companies who recover data from Flash media. And they charge a lot, considering no cleanroom and Class 10 airflow is needed, to work on flash. It should not require $500 of labor to recover the data. If I was working on it: 1) Buy a USB to SD reader, one where you know you can separate the casing on the thing, and gain access to the socket. This is so you could (attempt) to join the reader contacts to the SD contacts, without relying on the normal "spring" action. 2) Some low temperature solder, in case the socket idea isn't working out. Something like ChipQuik. https://en.wikipedia.org/wiki/Solder Bi Pb Sn In 58C "Cerrolow 136" Also the ChipQuik desoldering alloy. ChipQuik is normally used to "poison" a solder connection, dropping the melting point to a level where you can slide dental floss between a chip and the substrate, while the chip is only moderately warm. It's an aid in situations where you would otherwise not be able to separate all the contact points at once. In this case, you'd be using it, to attempt to make a temporary connection to the contacts, without upsetting any higher temperature materials inside. You would preferably not want to use solder if at all possible. I don't even know if anyone carries ChipQuik any more. The trick is to get one of their small samplers, at a reasonable price. Not a huge kit with a pound of the stuff in it. Even a small sample of the stuff is expensive. ******* The Wikipedia article shows some examples. https://en.wikipedia.org/wiki/Secure_Digital You can see why you wouldn't want to get the PCB too hot, as there are surface mount components in there. https://upload.wikimedia.org/wikiped...Sd_insides.png And this more modern one, the controller chip is a "glob-top". There is a bare silicon die, underneath the black plastic bump. It's wire bonded (or gold bumped) to the substrate, then the black plastic is applied on top of it. Glob top was first applied to digital clock designs, many years ago. https://upload.wikimedia.org/wikiped...DHC_inside.jpg HTH, Paul |
#3
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OT-SD card repair?
In message , Paul
writes: rwwink wrote: Way OT and most likely the wrong grougp but I have a 4 MB SD card that has physcially bit the dust. The termain end has split and broken with a number of the terminals sunk lower that the others. Would anyone have an idea how, or if, it's possib;e to bring the card back so I can backup the file that are on the card? Running W7 x64 R. Wink [] If I was working on it: 1) Buy a USB to SD reader, one where you know you can separate the casing on the thing, and gain access to the socket. This is so you could (attempt) to join the reader contacts to the SD contacts, without relying on the normal "spring" action. Seconded. Probably get the reader from a poundshop (or the US equivalent) - mainly because it's for this one-off activity so you don't want to spend much, but also, the ones they sell are more likely to be flimsily made! [] You would preferably not want to use solder if at all possible. [] You can see why you wouldn't want to get the PCB too hot, as there are surface mount components in there. [] And this more modern one, the controller chip is a "glob-top". There is a bare silicon die, underneath the black plastic bump. It's wire bonded (or gold bumped) to the substrate, then the black plastic is applied on top of it. Glob top was first applied [] Although since these wire bonds are spot-welds rather than solder, they can be surprisingly robust! You could also try building up the contacts with (maybe several folds of) tinfoil or similar. (Ideally get a scalpel for cutting it, unless you're better than I am with scissors!) Use a long strip, so you can fold it back round the other side of the card, so it doesn't come loose inside the reader. Sort of |\ CZC| where C is the card and contact surrounds, and - / \ Z CCCCCCCCCCCCCC| are the foil. --------------/ (If the depressed contacts are adjacent, maybe some double-sided tape on the back of the card to keep the strips straight and not touching each other.) -- J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf "Bother," said Pooh, as he tasted the bacon in his sandwich. |
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