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SM-R765F Teardown

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By ferrett1968, Member on 20th August 2017, 10:02 AM
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Dear friends,
I found that the LTE connection is very useful when you have to leave your mobile somewhere and you can get calls and notifications through mobile connection.
I bought a Gear S3 LTE (R765) from a Singapore site because in Italy it is not available.
I sadly discovered that i couldn't register a TIM eSIM (Italian Mobile) because, while executing the registration process, I had the answer "...Can't connect to the server ...".
So I kept reading around how to solve the problem...
My first attempt was to flash a 765v hoping a different rom could help me in registering the italian eSIM on my device....: Yellow triangle brick!!!!!
Thank to the senior member adfree I realized that I flashed a Version 2 Bootloader and I could not downgrade it back.
I tried to flash another rom, a proper one for 765f, but with a BL ver.1 : brick again but in a different way: the device started with the starting screen (Gear s3 Frontier...) then it just seemed to switch off...
Trying to enter again in the Odin menu ( home button for 8-9 sec - reboot - 3 times home button - download wireless )... it was just stuck in the Tizen logo.
Here https://forum.xda-developers.com/gea...-r770-t3646789 I found this quote from xedaman about BokkieAndijk:

Quote:
... i found info how to get my S3 back to live again. If you have the same problems with your (bricked) S3 then go to download wirelessly mode en as soon as you see the flower then push the power button 2 seconds en let it go for 1 second, than push it again for 2 seconds en let it go for one and so on til you get him in to download wirelessly mode. May take some attempts but it saves my ass a few times.

I did it and i worked fine!

It gave me the opportunity to flash a custom rom from 765v. I thought that a custom rom would have been accepted from a V2 BL.... NOPE!

Now I am stuck again: the divice boots but remains to the booting screen (Gear s3 Frontier...). I tried to enter in Odin menu and every thing works but download wireless: It remains stuck on the Tizen Logo.
I tried to apply the same technique I used to unbrick it before but seems unuseful.

So I decided to open the device and I discovered that , as adfree said a few times, just the LTE versions have a side pinout near the strap band.
Opening the device I saw that the side pinout (5 pins) is connectd to the motherboard well known 5 pins.

I am now posting here the pics of the device opened hoping someone can help me to unbrick the device explaining how to connect the s3 pinout to a pc to let me flash it with usb odin and downgrade the BL... OR, if someone knows how to unbrick the device with another button combination, please post it!

Best Regards
P.S.
Opening the device I ruined screws and back cover, do anyone knows where to by a new backcover and some F**** (freaking) normal screws of that size?
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20th August 2017, 02:28 PM |#2  
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Hello.

Thanx for posting the Pictures.


On Ebay and other sources I found Rear Case from SM-R760... which maybe is compatible with SM-R765... for around 30 $ or less...
https://forum.xda-developers.com/sho...&postcount=294


But GH82-12922A I think is without Flex cable and external Pinout...

Code:
			Rear Case
SM-R760			GH82-12922A
SM-R770			GH82-12954A
SM-R765			???

In theory it would be very easy to trace PINOUT from Rear Case of SM-R765... with Voltmeter/Multimeter...

Best Regards
20th August 2017, 02:40 PM |#3  
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I don't really know a clue about the electricity topic, if i buy a voltmeter, would you explain me how to trace the pinout map?

Is it possible that doesn't exist a flexcable for s2 and x3 LTE?

Which keyword would you suggest?
20th August 2017, 03:02 PM |#4  
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About trace Pinout... look here:
https://learn.adafruit.com/multimeters/continuity

Maybe friends or family have Voltmeter... Or somebody can help you...

If you use Google and search for GH82-12922A or GH82-12954A you will find few offers...

Code:
		Rear Case
SM-R760			GH82-12922A
SM-R770			GH82-12954A
SM-R765			???
But here is difference between SM-R760 and SM-R765 visible:
https://forum.xda-developers.com/sho...&postcount=293

Maybe you could ask sellers on Ebay... if they have this part for SM-R765... with Flex cable...
As I saw in main only Pictures of 1 side... not of both...


I spend many hours of clicking around through Internet...

Still it is not really easy to find SM-R765 infos nor users...

At the moment I am trying to find also Service Manual of SM-R730... Gear S2...
Maybe additional usefull Infos inside... about external Pinout...

But also here... hard to find...


Best Regards

Edit 1.

Here are offer for SM-R760 with more Pics... here you can see difference... GH82-12922A
https://rounded.com/samsung-gear-s3-...82-12922a.html
23rd August 2017, 02:15 AM |#5  
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In this Thread are also Service Manual for SM-R760 and SM-R770...
https://forum.xda-developers.com/sho...4&postcount=42


In this post Picture is taken from Service Manual...
We can read text:
Code:
Pogo400
Pogo401
Pogo402
Pogo403
Pogo404
For easier use, I have used only last 2 Digits...
Code:
00
01
02
03
04
In attached Picture... taken from FCC SM-R765... on the left side I used same like from Service Manual...
On the right side... it is mirrored...
I hope not made mistake...

I will add soon next Picture for external Pins... I will use A - E
Code:
A
B
C
D
E
I hope this could help to trace...

Best Regards

Edit 1.
Added second Picture with Pins outside Rear Case...
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23rd August 2017, 12:18 PM |#6  
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I did it:
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23rd August 2017, 12:40 PM |#7  
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Here it is.
So how could I connect a usb to the s3?

I mean if fisically there is a connector and: which is the map of a usb connector?
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24th August 2017, 03:14 AM |#8  
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Code:
your external	from Service Manual R760/R770 	UNTESTED for SM-R765
1----->		POGO401			---->	NONE
2----->		POGO404			---->	Ground
3----->		POGO403			---->	DATA+
4----->		POGO402			---->	DATA-
5----->		POGO400			---->	VCC/+5V



artem5 Version

https://forum.xda-developers.com/sho...2&postcount=73

Code:
POGO400 - VCC
POGO401 - none
POGO402 - Data-
POGO403 - Data+
POGO404 - Ground

My SM-R732 tested Pinout:
https://forum.xda-developers.com/sho...9&postcount=29


Interesting... if I am not drunken or blind... your result looks like my used SM-R732 Pinout...
So in theory maybe not totally wrong...


I have at the moment NO idea how to connect to these PINs...
MAYBE Service Manual from:

Code:
SM-R730
and/or
SM-R765
Can give additional Infos...

No idea if you can create Connector... if this is same dimension like on my SM-R732... this is so f%&ing small tiny...


It is untested THEORY...

Risk to Hardware damage Gear and/or USB Port of your Computer...

So please be VERY carefully before you trying something...

We will try to collect more infos...
Maybe somebody can support us/you...

Thanx in advance.


Best Regards
1st September 2017, 06:55 PM |#9  
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Here i am.
It took time but...
I just soldered wires ( with a little help from my friends...) on my 765f as you can see from the pics below.
I soldered the wires on the outside pinout of the watch.... I connected but usb port.... now I think I need your help.
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1st September 2017, 11:35 PM |#10  
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Try to contact this user...
https://forum.xda-developers.com/gea...r765s-t3665558

Maybe work together to get Firmware for SM-R765F and SM-R765S...


Caution!
Be carefully with soldered wires... you can also damage your USB Port on Computer side...

Maybe you have older PC for test...


Suggestion...

1.
In theory best idea to start if you have Firmware for SM-R765F...

Yes I know it is hard...

2.
To check if Pinout and Soldering is correct successfully...

You could read out PIT (patition table) from Device with Tool Heimdall for instance...

3.
If wires correct...
Charging should be possible...

4.
If Windows Driver not connected... you see Error in Download Mode...
Check Device Manager...

Then ONLY try to switch RX and TX... NOT the other cables


Best Regards
2nd September 2017, 10:50 AM |#11  
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Progress about PIT file...
https://forum.xda-developers.com/sho...60&postcount=5



We have now:
Code:
SM-R765S
SM-R765T
ATT PIT hopefully follow... soon...

And with help of SM-R765S user we can hopefully soon compare SM-R765F PIT...


Best Regards

Edit 1.

SM-R765F leads to Singapore... Salescode
Code:
XSP
No idea which countries also

Google results for today...
http://pdadb.net/index.php?m=device&...3_frontier_lte
http://www.samsung.com/sg/wearables/...-frontier-lte/
Code:
SM-R765FDAAXSP
Product Code...
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gear s3 frontier, sm-r765f, teardown s3, unbrick

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