Here is the Samsung Galaxy S3 (GT-I9300) Service Manual.
Please take a moment to read the notes and issues about this manual in this post.
For some reason Google didn't pick up that post, so I had to re-post here...
Now, if you are brave and happen to have a GT-I9300, you can still help us by posting some
internal pictures, to verify some issues in the manual. If they are good,
some of them will eventually become part of the SGS3 Hack-Pack.
Thanks and Enjoy!
I will be opening up the phone in the next few days due to me managing to damage the sim card holder section(not holding sim card) So at present i have got somthing putting pressure to keep sim card in place. I have a new sim card holder on order so when it arrives i will pull phone apart and take some pictures.
If you have any advice for me before attempting this please let me know via pm
Do you have any experience in this kind of electronics? I mean, are you planning to replace and solder the SIM card holder by yourself?
If you have not done this type of soldering before, I do not recommend it.
If you do decide to do it on your own, make sure:
You are working on a clean workspace
You are well grounded and not wearing wool clothes mixed with synthetic materials to avoid any ESD.
Have the right tools for the job.(Temp controlled SMD soldering iron + flux and acid-free lead-free SMD solder etc.)
A very steady hand with good eyes!
As for the pictures, keep the environment as bright as possible, preferably daylight. Try to keep your PCB on a bright or neutral background. (Bright cardboard is usually good.) Inspect your pictures and make sure you can read the text on the smallest chips. (The big ones we already know about, its the smaller ones that are difficult to navigate around.) Make sure the pictures are well focused.
Good Luck!
From looking at the pictures I was hoping I don't have to solder the sim card slot in. It looks easily replaceable as it looks like it's just a connector and not soldered
Replaced the sim holder. My camera wasn't good enough to get focus of the smaller chips however it is very very easy to take phone apart. And I guess Samsung are expecting issues with sim slot so they have fixed it using one screw and connected to board using a pull off connecter.
Just in case anyone else is interested the sim holder/sd holder cost me £20, delivered.
E:V:A said:
Here is the Samsung Galaxy S3 (GT-I9300) Service Manual.
Please take a moment to read the notes and issues about this manual in this post.
For some reason Google didn't pick up that post, so I had to re-post here...
Now, if you are brave and happen to have a GT-I9300, you can still help us by posting some
internal pictures, to verify some issues in the manual. If they are good,
some of them will eventually become part of the SGS3 Hack-Pack.
Thanks and Enjoy!
Click to expand...
Click to collapse
amazing !!!
Hi guys,
Here is my contribution to da community, hope so it helps.
h t t p s : / / docs . google . com/open?id=0B9lrf7AWQW7ETjRZTkFXb1luN0E
On image 20120616_150200.jpg you can see the region jumpers. The images are of a live demo unit - everything works besides the GSM/3G data. Haven't tested to see if the NFC is working.
The real unit has some more antenna connector. The demo one does not have PBA /printed board antenna/ the ANT102 and ANT103 as well as the capacitors and the coils u may seen them market in red cycles (ANT102, ANT103, C102, C191, L103, L102) there is no room on the MOBO for C192 /or at least I can't find its place/.
Thanks.
^^ Here is the link for above! (Thanks!)
Hi again,
I can confirm that the NFC is working on the live demo unites. According to the original S3 user manual the NFC antennas are build into the battery back.
I still can't figure out what is the "W2" antenna connector for. The Live demo unit has no connector soldered to the motherboard and also lacks the small PCB antenna with the white coaxial cable. Some ppl claim that the W2 is for WiFi antenna, but it is not, because I got great WiFi connectivity tho the lack of such PCB antenna. I can only confirm the WiFi working fine, under "G" type of WiFi networks. The openWRT firmware of my current router has known bug and I can't bring up "N" standard in air, to check if the PCB antenna is for "N" type of WiFi networks.
I also did some testing to see if the PCB is for GLONASS or GPS, and it seams that this PCB antenna with the white coaxial cable is not for any of these services. That's why I think it might be for wifi "N" or 3G data/networks. Donno if the 802.11n requires a separate antenna.
^^ Please post a link to a specific image, that clearly show the connector(s) you're talking about.
Hi I have a live demo unit to, so I think I can help about this =).
I can't show you the mainboard back because I' m new user... xD
I don't really know what you mean with NFC (sorry, I'm not really good with english)
But
W1 is a GSM external antenna conection
W2 is a wifi external antenna conection
And the white wired antenna is for wifi to.
After thinking a lot, if you conect an antenna to the GSM antenna conection (external or the internal lacked in Demo unit) you probably can't use phone function.
That function probably was crippled by software or because demo units don´t have imei maybe o.o.
The only thing I need to try is to connect a microsim to the phone
No one has any insights ???
johnny21a said:
No one has any insights ???
Click to expand...
Click to collapse
I have sgs3, international version on my workbench right now.
Don´t have any clue what could I share, so - if there is anything specific -- let me know. I will do my best..
BR
Samsung galaxy S3 i747
i have a Galaxy S3 SGH-i747m that has been water damaged and given to me so i could try and fix it. I can take pretty much any pictures you want, have openned the phone a couple times now to try and clean it up.
My problem is that the works well, it starts up, unlock the screen, plays sound...but the screen is off. Now at first when i was "playing" with it the screen would flicker on and off to show me the battery charging logo when it was plugged in. I've cleaned the phone and all flex connectors with some products. the phone still turns on and works but my screen is off. It detects the touch since i can unlock the screen ( it plays the water sound when i slide my finger on the screen) and speaker works when i boot it up (little booting sounds).
I was thinking there might be a small fuse on board for the screen backlight and that could be blown. I was also thinking my battery might be damaged and is not giving the phone the right voltage to the right connectors or something so i have ordered a new battery on ebay (under 4$) and am waiting for it.
Anyone has an idea to some specific things i should be looking for ? only thing haven't disassemble is the digitizer from the framebecause doing so would surely break the glass. It bums me up a bit since there are some electronics behind the frame that could have been damaged by the water that i couldn't see.
Bigred065 said:
i have a Galaxy S3 SGH-i747m that has been water damaged and given to me so i could try and fix it. I can take pretty much any pictures you want, have openned the phone a couple times now to try and clean it up.
My problem is that the works well, it starts up, unlock the screen, plays sound...but the screen is off. Now at first when i was "playing" with it the screen would flicker on and off to show me the battery charging logo when it was plugged in. I've cleaned the phone and all flex connectors with some products. the phone still turns on and works but my screen is off. It detects the touch since i can unlock the screen ( it plays the water sound when i slide my finger on the screen) and speaker works when i boot it up (little booting sounds).
I was thinking there might be a small fuse on board for the screen backlight and that could be blown. I was also thinking my battery might be damaged and is not giving the phone the right voltage to the right connectors or something so i have ordered a new battery on ebay (under 4$) and am waiting for it.
Anyone has an idea to some specific things i should be looking for ? only thing haven't disassemble is the digitizer from the framebecause doing so would surely break the glass. It bums me up a bit since there are some electronics behind the frame that could have been damaged by the water that i couldn't see.
Click to expand...
Click to collapse
check if you can see anything on the screen, use some extra light, torch for example.
if so - then its more likely that the LEDs in the display panel are damaged, since it flickered, as you said. also could be the driver circuit for backlight. Clean connectors for display panel, use magnifier, or better microscope to check for corrosion. use IPA to clean or scrape off the corrosion.
also - maybe this is not the right place to discuss this.
GL
Redrigon said:
Hi I have a live demo unit to, so I think I can help about this =).
I can't show you the mainboard back because I' m new user... xD
I don't really know what you mean with NFC (sorry, I'm not really good with english)
But
W1 is a GSM external antenna conection
W2 is a wifi external antenna conection
And the white wired antenna is for wifi to.
After thinking a lot, if you conect an antenna to the GSM antenna conection (external or the internal lacked in Demo unit) you probably can't use phone function.
That function probably was crippled by software or because demo units don´t have imei maybe o.o.
The only thing I need to try is to connect a microsim to the phone
Click to expand...
Click to collapse
I don't have he white antenna coaxial cable neigh the PCB antenna board that this cable is connected to but I have WiFi.
Could it be for WiFi N(150Mbps)?
Watter damage, LCD working/not working?
Bigred065 said:
i have a Galaxy S3 SGH-i747m that has been water damaged and given to me so i could try and fix it. I can take pretty much any pictures you want, have openned the phone a couple times now to try and clean it up.
My problem is that the works well, it starts up, unlock the screen, plays sound...but the screen is off. Now at first when i was "playing" with it the screen would flicker on and off to show me the battery charging logo when it was plugged in. I've cleaned the phone and all flex connectors with some products. the phone still turns on and works but my screen is off. It detects the touch since i can unlock the screen ( it plays the water sound when i slide my finger on the screen) and speaker works when i boot it up (little booting sounds).
I was thinking there might be a small fuse on board for the screen backlight and that could be blown. I was also thinking my battery might be damaged and is not giving the phone the right voltage to the right connectors or something so i have ordered a new battery on ebay (under 4$) and am waiting for it.
Anyone has an idea to some specific things i should be looking for ? only thing haven't disassemble is the digitizer from the framebecause doing so would surely break the glass. It bums me up a bit since there are some electronics behind the frame that could have been damaged by the water that i couldn't see.
Click to expand...
Click to collapse
I have identical symptoms with my i9300.
1. Water damaged
2. Dried in a can of rice etc over several days
3. Cleaned under sim card, lots of debris there, looked scorched, I cleaned with alcohol and a brush in an ESD protected environment.
4. Re assembled, the display briefly flashed on, and showed the expected "Battery is low, an d No Sim Card" then powered off.
5. Now after charging the battery and emplacing my sim card, I hear the proper musical tones when the phone boots but the screen doesn't light.
Where you able to get the screen working?
I am going to try a more throughal cleaning and I will try viewing the LCD under a more power full light.
I too worry that just getting the LCD screen replaced might not work; the screen may be fine but the mother board LCD power supply might be at fault...
I will keep you posted and keep an eye on this forum to find out how to fix this.
This thread has served its main purpose.
OT discussions are prevalent.
Thread Closed!
The tabs connecting the antennas to the motherboard is pretty fragile and breaking them is a big problem. Mine is broken, for unknown reasons, and I'm proposing some solutions.
Solder with wire
Someone tried to do this and according to the replies, its not safe and would probably lead to the end of the world. But the results are better than having no antenna at all.
Using other pins on the motherboard
Crazy idea, but would probably work. This is the part where I need help.
I labeled which I think are not important(Correct me if I'm wrong). #2.1 and #2.2 looks like ground tabs for the motherboard.
Im also planning on using the nfc's tabs, labeled #2.3, since I never use nfc and probably never will.
First of all, is it safe and reasonable to take these tabs and use them as replacement tabs?
If yes, then which tab should I use? #2.1, #2.2, or #2.3
I'm currently choosing between solution 1 and 2. Any comment would be deemed valuable.
Thanks
Image courtesy of iFixit.com
Bump. Anyone?
You are correct in your assumptions of what the pins purposes are... the pins you call "ground" are to ground the shield on the back cover... most likely to pass FCC requirements on RF emissions... and if you don't use the NFC radio, those pins would probably do fine also... you may end up losing the NFC radio after awhile running with no load on the antenna outputs so that may be a "no turning back hack"
I have powered up my tablet and used it for 30 minutes or so with the back cover removed to test my antenna mods so those ground pins are not required for the tablet to function properly... not like they complete a circuit or anything
Worked for me
I know this is an old thread but, FWIW, using the mentioned spring tabs (#2.1 & #2.2) worked for mine. As previously stated, they appear to just be EMI grounding. They probably clean up emanated noise that could otherwise interfere with the tablet's antenna reception/transmission. I moved them to replace the broken wifi tabs and so far reception for wifi works just fine. I haven't tried any other antennas yet but I suspect the impact is minimal on the other antennas.
I'll update if I notice any degradation to the other antenna functions.
i think i shorted out my s4 trying to charge battery with stripped wires because charging port would not work,so i took all the parts from another activated s4 with a broken screen which is on my family plan and put them into my s4 which would not even turn on and after replacing innards the phone now turns on everything works but wont activate tried soft and hard reset tried both sim cards. My question is after you swap parts out is there something i have to do to get the phone to think all the parts now inside are the original parts. the only parts in my phone that are original are the circuit boards or what i call chips which would have to be heated and removed which i am not willing to do. please reply everything works except wont activate. is it possible i fried the circut boards out?
Hi, I'm curious exactly where you put the stripped wires?
I understand there are 2 leads above the battery that are to support a wireless charging module/case. Is That where you hooked it up?
What exactly happened? did it smoke or turn off suddenly? Any visible black spots?
Also, very important, the main board (directly above battery bay, rear camera attaches to it) stores the IMEI # which will persist with the physical chip. I assume that's why it won't activate, sprint sees it as a different phone instead of your phone.
This might be ok though, as long as your IMEI is clear for activation. In this case, you just need a IMEI change on your account, and you should be golden.
(If unsure, call sprint and ask for ESN/imei check)
If blacklisted/active, then there are ways of repairing your IMEI. Legality of it is in the grey, but my view is if you own both phones, you can swap the imei's. Just don't sell the unused one, or zero out the meid (Google play won't work with 0'd imei so you'll have to make a phony one instead)
I used CDMA Tool, it took a bit of fiddling but with the proper guide, you should be able to accomplish it. (There's some kind of efs backdoor, and you must always first zero out the imei, then write a new one, never write a current imei to a new valid imei. For some reason it won't work, otherwise. (That was my experience, YMMV)
Last, you can buy the USB board that plugs in for about $6 on eBay. (Bought this today) this one is relatively easy. Unfortunately I found out the home button replacement requires removing the digitizer, using a heat gun. The USB board is one of the first things you see after taking plastic back off (9 screws).
Also, let me know how it works out.
Mvmcad thanks for reply, i put the 2 stripped wires in ]between the battery terminal and the terminls on rear of phone under the case it sparked but no smoke and no black spots, phone just would not turn on anymore untill i swapped all the parts .to get a clearer picture if u pop off your back cover and with the battery in place slide wires in between phone terminals and battery terminals at top of battery. would sprint be able to switch IEMI # over phone ?
Oh I see.. Yes sprint should be able to swap a IMEI over the phonr as long as you can provide the correct account information (they probably will ask for old IMEI as well as new IMEI). Gl!
So after my capacitive keys died I ordered a new power board with the capacitive keys I opened and replaced the board.
But after that I can't get 3g or H+ signal I can only connect to 2g and 4g signals and I get complaints from the person that I speak that they don't hear me well and my voice sounds like I have 1 bar of signal.
Anyone knows anything about this problem?
I have done full restore, wipe everything, installed cm 12.1 but I have the same problem.
Possibly know a little about this......
Back in my S2 days, I had reason to replace the USB socket board.
Before I did it, I did some research and found that this board was in some way connected to the signal reception side of things.....
I also discovered that there are a number of different versions of this board, and buying the wrong one would result in loss of signal. This all may still apply to the S5.....worth checking out.
Look at your old board and look for some printing on it that may or may not say "rev X.X" (the X's will be numbers) then compare it to the new board......
http://i.imgur.com/rVnFwJM.jpg
keithross39 said:
Possibly know a little about this......
Back in my S2 days, I had reason to replace the USB socket board.
Before I did it, I did some research and found that this board was in some way connected to the signal reception side of things.....
I also discovered that there are a number of different versions of this board, and buying the wrong one would result in loss of signal. This all may still apply to the S5.....worth checking out.
Look at your old board and look for some printing on it that may or may not say "rev X.X" (the X's will be numbers) then compare it to the new board......
http://i.imgur.com/rVnFwJM.jpg
Click to expand...
Click to collapse
Thx ill give it a try
Heya guys, to make a long story short, bought an S8 on ebay, Verizon G950U, and was told the camera didnt work and there was no IMEI etc...
Upon checking, the front camera has a torn connector. I fiddled around with the daughter board where the antenna connectors etc.. are, (breaking the speaker and its entire cover in the process) and sometimes I randomly get cellular back, but it doesnt stay for long. i'm not sure whats faulty, but I'm certain it has nothing to do with the mainboard. The latest time the connection popped back was when I tried moving the back cover back on, I guess something must have clicked. I already reinforced the wires and the surrounding connectors, but I cannot get cellular at will. Would replacing the board in it's entirety be a fool proof solution? Hoping for help on the matter.
EDIT: Not sure if it was coincedental, but Also during one of the times the cellular service returned, it was immediately when I plugged my headphones into the device.
Akumai said:
Heya guys, to make a long story short, bought an S8 on ebay, Verizon G950U, and was told the camera didnt work and there was no IMEI etc...
Upon checking, the front camera has a torn connector. I fiddled around with the daughter board where the antenna connectors etc.. are, (breaking the speaker and its entire cover in the process) and sometimes I randomly get cellular back, but it doesnt stay for long. i'm not sure whats faulty, but I'm certain it has nothing to do with the mainboard. The latest time the connection popped back was when I tried moving the back cover back on, I guess something must have clicked. I already reinforced the wires and the surrounding connectors, but I cannot get cellular at will. Would replacing the board in it's entirety be a fool proof solution? Hoping for help on the matter.
EDIT: Not sure if it was coincedental, but Also during one of the times the cellular service returned, it was immediately when I plugged my headphones into the device.
Click to expand...
Click to collapse
I had a note 5 that cellular issues because the quik plugs for the antennas wore out and it did a similar type thing Once I swapped mbs it worked like a dream