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Damaged MicroSD slot

Posted: Sun Nov 06, 2016 2:49 pm
by sabareeshchambayil
My raspberry pi2 sd card slot damaged and pi not booting.i figured out its problem with microsd card slot and managed to run for 2 months with inserting a small piece paper along with micro sd card.

Now that Is not working(paper piece fix).

And I found a pin bend downward and tried to pick it up little with a small needle and the result is broken pin.So I thought it's better to replace the card slot and removed the microsd slot from pcb .
Now the problem is micro card slot is not available in my area .
Tried the mobile spare shops and I figured out the raspberry pi2 card slot is not using by any mobile.

What's I am supposed to do now.?
From Anywhere I can get MicroSD slot to repair my pi

Re: Damaged MicroSD slot

Posted: Sun Nov 06, 2016 3:58 pm
by Heater
Put your Pi in the trash and get a new one.

Fixing it will likely cost more time and money than it's worth.

Re: Damaged MicroSD slot

Posted: Sun Nov 06, 2016 6:08 pm
by Tinderbox (UK)
There is supposedly a thread on how you can boot from an usb 2.0 port instead of the microsd.

viewtopic.php?f=63&t=155167

John.

Re: Damaged MicroSD slot

Posted: Sun Nov 06, 2016 6:11 pm
by DirkS
Tinderbox (UK) wrote:There is supposedly a thread on how you can boot from an usb 2.0 port instead of the microsd.

viewtopic.php?f=63&t=155167

John.
Only works on a Pi3B. OP has a model 2B

Re: Damaged MicroSD slot

Posted: Mon Nov 07, 2016 6:47 am
by karrika
This could be a suitable replacement. And it looks as shipping to India is supported for free.

http://www.ebay.com/itm/10Pcs-TransFlas ... Sw9VZXO-Wi

As 10 pieces only cost 1€ (shipping included) it is worth a try. My guess is 30 minutes work with a soldering iron and good magnifying glass. You also get 9 spares in case you ruin it again.

My suggestion is to unsolder it first. Then apply solder on the bare pads and clean up the area with alcohol. After that put the new part in the correct place. Solder one corner to the board to keep it in place. Then heat up the pads with a clean soldering iron. No more tin. Keep the iron at 255 degrees Celcius. (Or use hot air through a very small nozzle if you have this option available.)

It is definitely worth to spend a little time in fixing this. €35 for 30 minutes of work. And you learn to work with small electronics at the same time.

Re: Damaged MicroSD slot

Posted: Mon Nov 07, 2016 8:59 am
by lumsdot
You will struggle to solder that without bridging gaps

Re: Damaged MicroSD slot

Posted: Mon Nov 07, 2016 9:18 am
by gregeric
lumsdot wrote:You will struggle to solder that without bridging gaps
Drag soldering FTW. Seeing it for the first time was like watching a magic act.

Re: Damaged MicroSD slot

Posted: Mon Nov 07, 2016 10:34 am
by Burngate
gregeric wrote:Drag soldering FTW. Seeing it for the first time was like watching a magic act.
Beautiful, init?

Re: Damaged MicroSD slot

Posted: Mon Nov 07, 2016 2:23 pm
by karrika
Burngate wrote:
gregeric wrote:Drag soldering FTW. Seeing it for the first time was like watching a magic act.
Beautiful, init?
Drag soldering is more difficult than spreading the tin first and then heating. But if you get bridges you can use drag soldering to get rid of the bridges. I hate to clean up afterwards. That is why I don't use this technique much.

Re: Damaged MicroSD slot

Posted: Mon Nov 07, 2016 2:30 pm
by DavidS
Easier and less expensive to do it correctly, use some solder paste, and a home made solder mask. Cheaper in amount of solder used, electricity used, and time consumed. Also gives better results, can still be done with a soldering iron for repairs like that.

Re: Damaged MicroSD slot

Posted: Mon Nov 07, 2016 6:29 pm
by karrika
DavidS wrote:Easier and less expensive to do it correctly, use some solder paste, and a home made solder mask. Cheaper in amount of solder used, electricity used, and time consumed. Also gives better results, can still be done with a soldering iron for repairs like that.
Most people don't have fresh solder paste in their fridge. Also making a solder mask is difficult and costly. Applying a layer of tin on the pads before you set the connector on the board does the same thing without a need for professional equipment.

If you have a smd workstation then things are easier.

Re: Damaged MicroSD slot

Posted: Tue Nov 08, 2016 8:20 am
by sabareeshchambayil
OK friends.
Thanks for replies.

One more thing I need to know- what are the two pins in black circle?

Re: Damaged MicroSD slot

Posted: Tue Nov 08, 2016 9:29 am
by gregeric
They are likely unused pads for the card-detect switch built into the socket.

Re: Damaged MicroSD slot

Posted: Tue Nov 08, 2016 10:10 am
by sabareeshchambayil
gregeric wrote:They are likely unused pads for the card-detect switch built into the socket.

So they should be jumpered to make sure memory card will work

Re: Damaged MicroSD slot

Posted: Tue Nov 08, 2016 10:14 am
by sabareeshchambayil
Some of the compatible micro sd slot are available in aliexpress but without card detect

Re: Damaged MicroSD slot

Posted: Tue Nov 08, 2016 10:22 am
by gregeric
You can safely ignore them, they are not required for correct operation.

All that is needed is GND, 3V3, CLK, CMD & D0-D3 (the 8 pads in a row, function not in my quoted order though). And the shield soldering, so that the socket is anchored mechanically.