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Question about replacing internal memory chip - General Questions and Answers

Is it possible to take a 32 GB chip and replace it with 16 GB chip, if both chips are in the same size, and for the same phone model?
Or in order to change memory, more things inside the phone are changed ? I hope you understand my question :laugh:

How is your chip attached to the board? If it's a BGA, I don't think you can solder that. If it's indeed possible to change the actual chip, the answer depends a lot of things like the system, the chip operation etc. This is a bit vague question to answer for good. Maybe add some details about the chip and system, board and such?

tapiov said:
How is your chip attached to the board? If it's a BGA, I don't think you can solder that. If it's indeed possible to change the actual chip, the answer depends a lot of things like the system, the chip operation etc. This is a bit vague question to answer for good. Maybe add some details about the chip and system, board and such?
Click to expand...
Click to collapse
Thanks for the help!
I am actually talking about the Galaxy s3 i9300 and the sudden death syndrome which occurs on the 16 GB version, where the eMMC chip fails (it is a BGA :crying,
It makes sense that you can replace the broken 16 GB chip with a new 16 GB, but do you think it is possible to replace it with 32 GB? or things don't work that simple, and when you change from 16 GB to 32, not only the chip itself changes, but many things around it do, so for a 16gb version, you can replace it with only the 16 gb chip?
Btw, theoretically, if I replace an eMMC chip on a dead i9300 , will it revive the phone? or the sudden death kills more components on the way, and not just the eMMC ?

I don't know a lot of the I9300 or the sudden death bug. It does sound to me that the eMMC in question might not actually be physically damaged but just corrupted beyond repair. It might be thus possible to reprogram it using JTAG.
Soldering a BGA is not possible as they use a technique called flow solder, meaning that components are first attached to place and then the board is put into a kind of owen. Many components with tens on pins (actually balls as they're BGA, ball grid array) get soldered at once. The solder balls/bumps are on the underside of the components so you understand why it is not possible to manually re-solder them.
For JTAG, you need to know the ports on the board, have a JTAG file to use, and have a JTAG machine. It's possible in a service shop or corresponding.
I hope this information is useful for you. Like said, I don't know all the particulars here but I used to work with consumer electronics design.

unfortunately i9300 Jtag seem locked , about replacing you have 3% of chance to solve with the standard stuffs .
but early something happened in my mind , removed old chip and resoldered new with wires .. plenty of pins under chip are NC . just few pins is need to be connected on pcb ! #acrazyidea

tapiov said:
I don't know a lot of the I9300 or the sudden death bug. It does sound to me that the eMMC in question might not actually be physically damaged but just corrupted beyond repair. It might be thus possible to reprogram it using JTAG.
Soldering a BGA is not possible as they use a technique called flow solder, meaning that components are first attached to place and then the board is put into a kind of owen. Many components with tens on pins (actually balls as they're BGA, ball grid array) get soldered at once. The solder balls/bumps are on the underside of the components so you understand why it is not possible to manually re-solder them.
For JTAG, you need to know the ports on the board, have a JTAG file to use, and have a JTAG machine. It's possible in a service shop or corresponding.
I hope this information is useful for you. Like said, I don't know all the particulars here but I used to work with consumer electronics design.
Click to expand...
Click to collapse
There is no JTAG for the i9300 :crying: but I was sure that you can put a new BGA in the place and use heat gun, it won't work?
About flow soldering, this is a machine that is making the PCB in the first manufacturing process of the PCB right? But if after the manufacturing, a component needs to be replaced? won't that be done by a human and not flow soldering machine? with a heat gun and stuff?
psytr0nic said:
unfortunately i9300 Jtag seem locked , about replacing you have 3% of chance to solve with the standard stuffs .
but early something happened in my mind , removed old chip and resoldered new with wires .. plenty of pins under chip are NC . just few pins is need to be connected on pcb ! #acrazyidea
Click to expand...
Click to collapse
But how do you know which pin should be soldered? Do you have the pinout of the eMMC?
Btw, what are the stuff used to do real bga soldering? because you said standard stuff won't do.
*One question still remains, can you replace a 32GB eMMC on an originally 16GB eMMC board? or it doesn't work that way .. and even if they are the same physical size, the boards are a bit different to match for the 16GB and 32GB ?
Thank everyone

BGA soldering, replacement
verynoob said:
There is no JTAG for the i9300 :crying: but I was sure that you can put a new BGA in the place and use heat gun, it won't work?
Click to expand...
Click to collapse
Well, the dimensions between pins are very small, so just heating it with heat gun would 1) probably produce fused contacts between adjacent balls and 2) destroy the eMMC due to excess heat.
verynoob said:
About flow soldering, this is a machine that is making the PCB in the first manufacturing process of the PCB right? But if after the manufacturing, a component needs to be replaced? won't that be done by a human and not flow soldering machine? with a heat gun and stuff?
Click to expand...
Click to collapse
They normally replace whole modules or boards instead. It's faster and more efficient.
verynoob said:
But how do you know which pin should be soldered? Do you have the pinout of the eMMC?
Btw, what are the stuff used to do real bga soldering? because you said standard stuff won't do.
Click to expand...
Click to collapse
Here is a video of a 8 ball BGA re-solder by hand. They call it a circus act, quite fittingly.
(sorry cannot put links here. The forum rules do not allow it. I wrote this with crayons as we are not allowed to have any sharp objects here )
They use the wire method here. I'd say, anything over 8 balls is ... well, impossible by hand.
verynoob said:
*One question still remains, can you replace a 32GB eMMC on an originally 16GB eMMC board? or it doesn't work that way .. and even if they are the same physical size, the boards are a bit different to match for the 16GB and 32GB ?
Thank everyone
Click to expand...
Click to collapse
That depends on the system, it might work, it might not. There are no guarantees. You can make a better guess of the result if you have pinouts of the both 16 and 32GB eMMCs and two system boards, one 16 and one 32GB version.
Even with all this, it would be interesting to know, why would anybody waste this much work on this task? Why not just save your sweat and nerves and go buy a new 32GB version?
If the JTAG could be unlocked, which could be even easier (illegal methods allowed? ) then the 16 GB eMMC could just be re-programmed. The service should have a JTAG access to this?

tapiov said:
Well, the dimensions between pins are very small, so just heating it with heat gun would 1) probably produce fused contacts between adjacent balls and 2) destroy the eMMC due to excess heat.
They normally replace whole modules or boards instead. It's faster and more efficient.
Here is a video of a 8 ball BGA re-solder by hand. They call it a circus act, quite fittingly.
(sorry cannot put links here. The forum rules do not allow it. I wrote this with crayons as we are not allowed to have any sharp objects here )
They use the wire method here. I'd say, anything over 8 balls is ... well, impossible by hand.
That depends on the system, it might work, it might not. There are no guarantees. You can make a better guess of the result if you have pinouts of the both 16 and 32GB eMMCs and two system boards, one 16 and one 32GB version.
Even with all this, it would be interesting to know, why would anybody waste this much work on this task? Why not just save your sweat and nerves and go buy a new 32GB version?
If the JTAG could be unlocked, which could be even easier (illegal methods allowed? ) then the 16 GB eMMC could just be re-programmed. The service should have a JTAG access to this?
Click to expand...
Click to collapse
Thanks
I think you tried to upload an image with the URL of the video? because there is nothing uploaded

this is a thread with full info : emmc pinout and some info .
standard stuffs = ordinary soldering tools , you can use to remove damaged but can't replace it by them ( self experienced ) ..
much temperature is not supported by emmc chips also !! so hard ..

Link
verynoob said:
Thanks
I think you tried to upload an image with the URL of the video? because there is nothing uploaded
Click to expand...
Click to collapse
Here you go. Try googling for "BGA solder"
http://hackaday.com/2012/11/13/hand-soldering-bga-parts-should-be-a-circus-act/

this a movie which will let's think alot , and give more info about this topic .
just watch and decide your self what to do ,. in my side I started to pratice .
http://youtu.be/ds04BTVL8i0

yuuup
verynoob said:
Is it possible to take a 32 GB chip and replace it with 16 GB chip, if both chips are in the same size, and for the same phone model?
Or in order to change memory, more things inside the phone are changed ? I hope you understand my question :laugh:
Click to expand...
Click to collapse
Hi and yes you can do that, you need to buy replacement emmc 16gb or 32gb with or without os on it ( if not flashing will be needed). You need also hot air machine some flux, after that when emmc is removed you need to clean soldering points on mobo and just put new emmc and solder it again with hot air her is link http://www.youtube.com/watch?v=rOYo9AcUQQI

AlenKing said:
Hi and yes you can do that, you need to buy replacement emmc 16gb or 32gb with or without os on it ( if not flashing will be needed). You need also hot air machine some flux, after that when emmc is removed you need to clean soldering points on mobo and just put new emmc and solder it again with hot air her is link http://www.youtube.com/watch?v=rOYo9AcUQQI
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Click to collapse
i bought an emmc chip which is sandisk, i know that the samsung's emmc chips are not sandisk but the chips are almost same except the brand, so will this chip work on samsung n7000?

zhjackss said:
i bought an emmc chip which is sandisk, i know that the samsung's emmc chips are not sandisk but the chips are almost same except the brand, so will this chip work on samsung n7000?
Click to expand...
Click to collapse
Hmmmm not sure. Changing mmc is dangerous for motherboard and in theory it should work but untill you try and put sandisk instead samsung wee dont know.

Related

Hi All
I wonder if anyone can help me identify a chip in my XDA/Aremis?
I got the phone for free as it was not charging. Obviously the guy had tried to fit it himself and broken an SMD chip leg off at the case. Optimistically, I spent a bit of time scraping the plastic off the case and trying to get a solder joint but no luck.
The chip itself has 4 legs, is around the size of the end of a ballpoint pen, located very close to the USB port and has the letters N87 printed on it.
I've searched this site and googled it, but had no joy. I'm hoping to buy a duff phone from fleabay and pinch the chip out of that, but if I fail, I'll need to get another chip or replace it with discretes if at all possible.
All replies gratefully received....
Steve

Hi,
I was wondering if any of you could help quickly. After a few days research and doing some adb exploring I've detremined I have the infamous emmc defective chip problem;
http://http://forum.xda-developers.com/showthread.php?t=1150917&highlight=emmc
I've been reading your post with interest, contributing comments about unrooting and s-onning for a warranty return, assuming I have the faulty chip, am I write it's impossible to get s-on again as it's not writable anymore?
Any help would be fab.
Matt
HTC Saga (Orange)
cwm v4104
HBOOT 6.98.1002

faulty chip means chip replacement.

I've just got my desire s back free replaced after s-off/rooting/fried emmc (UK). And now the big question is whether I want to try it again or not. I would assume they just replaced the chip with the similar one. I've got a sheet back from them with a table of the parts that were replaced:
- Mylar, Light Leakage Proof, SAG
- Conductive Fabric, RGB TW connector Shielding, SAG
- FRU, Main Board, HTC, English-WWE, GBR, UK, Regional IDL
I suppose I can run adb and check if the emmc chip is the same as i had before that got fried, then I wouldn't risk it. But if it's something different i think it's worth a shot.
Well, the chip is exactle the one I had before:
Code:
$ cat /sys/devices/platform/msm_sdcc.2/mmc_host/mmc0/mmc0:0001/name
M4G2DE

Hi to everyone whats up i have some Q and i think this is for DEV section, here is the tHing i opened my phone to clean it all and i have make ONE BIG mistake i acidently broke two small peaces ( look at picture i marked it with red circle and here is link to biger picture so you can see beter http://guide-images.ifixit.net/igi/nvbKG1sC1T3xY66q.huge ). Now all work fine but Camera, actually it is working butt when i take picture it doesn't save picture it just show me a gray instead of PIC and just FC/Camera stop working and funny thing is when i use camcorder it works and make a movie and after stop it also close cam FC/etc BUT IT SAVES MOVIE and i cam watch it so PLEASE TAKE A LOOK AT PIC AND PLEASE A LEAST IF YOU KNOW WHAT THIS PARTS IS I MEAN WHAT IS THE NAME OT THEM WRITE IT DOWN ON THREAD OR PM ME SO I CAN FIND THEM OR TAKE THEM FROM OTHER MOBO AND SOLDER THEM TO MY MOBO AGAIN THANKS ALLOT

update info
Following picture helps to indicate tantalum capacitors and other types:
1. Tantalum; 2. Tantalum; 3. Electrolytic Capacitor; 4. Electrolytic Capacitor; 5. 0805 Ceramic; 6. 1206 Ceramic; 7. 1210 Ceramic; 8 . High Q Porcelin RF; 9. Variable Trimmer; and 1/4 Watt leaded resistor as reference
WHAT IS THE BEST WAY TO SOLDER THEM AGAIN AND AS I CAN SEE IN MY CASE THERE IS No 5, 6 OR 7 I THINK AND AM SURE No 5 IS THIS SMALL ONE BUTT WHAT ABOUT BIGGER ONE CLOSER TO THIS HOLE ON MY MOBO AND THOSE I NEED ARE Non-Polarized Capacitor SO I THINK THAT SIDE OF EACH ONE WHEN SOLDERING ISNT MATER IF NOT PLEASE CORECT ME AND I FAUND THIS AS AM ASUMING THAT THIS IS CAUSING MY PROBLEM ACTUALY IT IS THOSE TWO CAPACITORS ARE FOR POWER MENAGMENT OF PRIMARY CAMERA ND I FIND THIS SITE SOME ONE TAKE A PART PHONE MOBO AND WRITE DOWN EWERY THING WHAT IS ON MOBO SO HERE IS WHAT I FAUND :
Location-Primary Camera Module
Function-User Interface
Comp Family-Passive
Comp Tipe-Capacitor
Qty-2
Component Description-Ceramic Multilayer - X5R/X7R
Markings-Brown
Form-0402
Caunt-2
Length- 1.00 mm[
Width- 0.50mm
and here is complete web page with table with all parts on mobo and other and i think that some one will find this useful http://www2.electronicproducts.com/Samsung_Google_Nexus_S_GT_I9020T-whatsinside_text-115.aspx THIS IS HUGE :laugh:
AND YUP ITS THE WAY I WANTED TO DO HERE IS VIDEO http://www.youtube.com/watch?v=EWeAOemTY_E and now i need to find this small pices of S******* ahhahahaha

Maybe Adam Outler it's your guy!!!
Sent from my Nexus S

Wisemath said:
Maybe Adam Outler it's your guy!!!
Sent from my Nexus S
Click to expand...
Click to collapse
hehehe nope am on my own on this thing as a can see and i didnt spend 3 hours on this and to not find and learn what to do NO WAY AM SMART GUY hehehe am IT Tec and not MOB tec but its almost the samE procedure just little smaller BUT I WILL TRY WITH HIM IF I FAIL

I was have the same problem with pictures (gray). I've renamed "DCIM" and "Camera" folders in SDCard for backup it, and pictures now works fine. Maybe you should try it, before do some hardware things .

Good luck! Hope you get it fixed. This thread belongs to the Q&A section, this isn't android development is it?
Sent from my Nexus S

If you already identified the component and have the necessary equipment (the thinnest solder iron and tweezer that you can find, as well as steady hands), all that's left is a good luck, man.

RL77LUC said:
I was have the same problem with pictures (gray). I've renamed "DCIM" and "Camera" folders in SDCard for backup it, and pictures now works fine. Maybe you should try it, before do some hardware things .
Click to expand...
Click to collapse
I HAVE TRIED THAT NO LUCK ahhahah and i know that i broke my board part so i only need to se which part it is and now i knoc couse my face front cam is working and camcoder also but primary cam wont save pic and there say that those broken pieces are for primary cam so i ONLY need to solder them back if some one have some god advice please write it down

Just solder them with a fine tip on a 15/30w soldering iron. Done it a few times, SMD components are small, but not impossible. Have something to hold the component down and a magnifying glass will help.

AlenKing said:
... so i ONLY need to solder them back if some one have some god advice please write it down
Click to expand...
Click to collapse
How about this:
Take a piece of copper wire about 1mm in diameter.
Wrap it around the soldering iron end.
Wait until it heats up enough.
Now you have your own micro-soldering iron!

Fraser34 said:
How about this:
Take a piece of copper wire about 1mm in diameter.
Wrap it around the soldering iron end.
Wait until it heats up enough.
Now you have your own micro-soldering iron!
Click to expand...
Click to collapse
Hmmm nice one but i have seen something like soldering paste you put it under smd and just put it in place and when you heat it up with hot air it solder hehe this one is best for small things like those
Sent from my Nexus S using xda premium

Hi again i have one problem more now i know what tipe of SMD are those two but i dont know on which to chose OK this small one is x5r 6.3-10v and biger one x7r is from 10-200v i think size of both are the same just this small one is gray and other is brown, but there is allot other parameters and i dont know which is the right one (here is the datasheet of those and please have a look and if you know which i need write it down thanks http://www.yageo.ru/pdf/HighCaps.pdf I REALLY NEEEEEED MY CAMERA hahahaha)CAN I JUST TAKE THEM BY THIS INFO THAT I HAVE NOW IS THAT ENOUGH

You really shouldn't be playing around with the motherboard if you aren't 100% sure what you're doing. But seeing as you already have, the best bet would be try contacting Samsung and if if they'll fix it under warranty. Just be sure not to say that YOU messed with it. Just put everything back to where it was and make it look like you didn't open it or touch it. I just got mine back from warranty for a faulty motherboard so I know they can replace it easy.
Good luck,
Regards,
Bomboholic

Bomboholic said:
You really shouldn't be playing around with the motherboard if you aren't 100% sure what you're doing. But seeing as you already have, the best bet would be try contacting Samsung and if if they'll fix it under warranty. Just be sure not to say that YOU messed with it. Just put everything back to where it was and make it look like you didn't open it or touch it. I just got mine back from warranty for a faulty motherboard so I know they can replace it easy.
Good luck,
Regards,
Bomboholic
Click to expand...
Click to collapse
hmmm as you can imagine this phone i a bit old hehehe so... and am IT so i have done this allot on comp mobos and other electronic stuff but now i dont know which tipe of those smds i need and when i find that i will solder them nice

AlenKing said:
hmmm as you can imagine this phone i a bit old hehehe so... and am IT so i have done this allot on comp mobos and other electronic stuff but now i dont know which tipe of those smds i need and when i find that i will solder them nice
Click to expand...
Click to collapse
Oh well thats nice. If you're an IT then you know what you're doing haha. Good luck on finding the sparts you need though!
Regardss,
Bomboholic

This might help about some components within I9505.
I'm new so I can't post links.Sorry about that. Check the web of ifixit
¡So say we all! From my GT-I9300

http://www.ifixit.com/Teardown/Samsung+Galaxy+S4+Teardown/13947/1

It seems that SIM card slot is placed on separate SIM/microSDXC board which is connected to the mainboard.
I am wondering if we could acquire spare/service doubleSIM/microSDXC board (i.e. from China or Korea) and install it, would it be possible to tweak regular S4 to the S4 Dual SIM model. Of course it would require some cuts to the internal plastic frame (covering motherboard) and special ROM.
Just an idea for brave devs having access to the service parts... If it would be possible and easy doable it could be nice idea for kickstarter...

Ok well here is my issue. While replacing the LCD assembly on my one plus one I managed to rip off the metal connectors(I believe they are called pogo sticks) on the logic board that make contact with the antenna's on the back cover. I ripped the ones that control the WiFi/Bluetooth and also the GPS one. I was trying to figure out how to fix this since when trying to soder them back on there was nothing they could be soldered to. I'm basically left with the empty spots on the PCB board where they are supposed to go. While looking at the logic board I saw that there are a couple of pigtail looking connectors on it that don't have anything particularly connected to them. I was wondering if I could use those to repair my connection issues. Or of any of you have any advice to give thank you for all your help ^_^