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Relay 4G Hardware Reference Guide

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By Jax184, Senior Member on 25th March 2013, 04:36 PM
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I've only had my Relay a week and already it's been torn apart! But what's bad for warranties is good for you, because now I can make a hardware reference guide for this phone like I did for the Sidekick 4G.

As before, this is a work in progress and based on my own research. I'm not an expert on cell phone tech, so everything here is provided with no warranties. Please let me know if you notice any mistakes and I'll be happy to update this document. I'm particularly interested in better documentation for the various components, like in-house PDFs.

Samsung Galaxy S Relay 4G Specifications:

Released as T-Mobile exclusive on September 19th, 2012.
SGH-T699
FCC ID: A3LSGHT699

2G Network: GSM/GPRS/EDGE – 850, 900, 1800, 1900 MHz
3G Network: UMTS/HSPA+ – 850, 900, 1700, 1900, 2100 MHz
WiFi: 802.11A/B/G/N dual-band 2.4/5GHz
Bluetooth 4.0
Near Field Communication

CPU: 32-bit 1.5GHz dual-core Qualcomm Snapdragon S4 (ARM V7 Architecture)
GPU: Qualcomm Adreno 225
RAM: 1 Gigabyte DDR2
Flash: 8 Gigabytes, ~5GB available to user under stock ROM
MicroSD slot for expansion

Display: 4" Samsung SuperAMOLED screen @ 800x480 with Multi-Touch Capacitive Touchscreen. 16,777,216 colours
Keyboard: 5 row 52-key QWERTY keyboard with inverted-T arrow keys

Rear Camera: 5 Megapixel with LED flash
Front Camera: 1.3 Megapixel

Other Features:
Augmented GPS/GLONASS
Accelerometer/Gyroscope
Compass
Light sensor/Proximity sensor
Mobile High-Definition Link (HDMI)

Size: 4.96" x 2.56" x 0.53"
Weight: 5.6 Ounces
Power: 1800mAH Lithium-Polymer rechargeable battery model EB-L1K6ILA with NFC antenna integrated.

http://downloadcenter.samsung.com/co...l_UVLG8_F4.pdf - User manual

http://www.jax184.com/projects/Relay...s%20Manual.pdf - Early draft of user manual, submitted during FCC approval.


Hardware Details:




0. Qualcomm MSM8260A Integrated Snapdragon S4 CPU, Adreno graphics core, UMTS modem, WiFi/Bluetooth backend, GPS/GLONASS receiver, DSP and USB controller
Marked:
Unknown
(Located under RAM IC as package-on-package)

1. Qualcomm WCD9310 "Tabla" Audio codec
Marked:
WCD9310
NCM218R1
A228002
13

2. Silicon Image SiI9244 MHL Transmitter
Marked:
SIMG
9244BO
NCS371A
10L2230

3. Samsung 8Gb (1GB) Low Power DDR2 DRAM
Marked:
Samsung 210
K3PE7E700D-XGC2
GKB2709U

4. Samsung 8GB NAND Flash
Marked:
Samsung 228
KLM8G2FE3B-B001
HHGX259X

5. Qualcomm HSPA+/CDMA2K/TDSCDMA/EDGE/GPS Transciever
Marked:
WTR1605
OVV
PHX403R1
AA22501

6. Qualcomm Dual-band Wi-Fi A/B/G/N, Bluetooth and FM Radios
Marked:
WCN3660
PGW541R1
A222002

7. Unknown
Marked:
SWt
GAD92

8. Anadigics Multimode Multiband Power Amplifier Module
Marked:
ALT6181
33945AC
1231PH

9. Anadigics AWT6624 UMTS1700 Power Amplifier
Marked:
6624R
4233AD
1230 PH

10. Anadigics AWT6622 UMTS1900 Power Amplifier
Marked:
6622R
4110AA
1228 PH

11. Invensense 6050 six-axis gyroscope/accelerometer
Marked:
Invensense
MPU-6050M
D2G554-K1
EI 1226 D

12. Qualcomm Power Management IC
PM8921
AD35130
f3228004

13. Analog Devices Mobile I/O Expander and QWERTY Keypad Controller
Marked:
ADP
5587
#215

14. Texas Instruments BQ24157 Lithium-Ion Battery Charger
Marked:
TI27A3JXI
BQ24157B

15. NXP PN544 Near Field Communication Controller
Marked:
44501
10 05
NXD2314

16. Atmel MaXTouch mXT224E
Marked:
MXT224E
MAH-IR0
2W1315B


http://www.jax184.com/projects/Relay...l%20Photos.pdf - Photos of a prototype Relay submitted to the FCC for approval. Notice that the PCB, RF plate, keyboard frame and even the back cover have all been revised.

http://www.jax184.com/projects/Relay...%20Results.pdf - Results of FCC testing of the NFC radio.


Take Apart:



Start with the phone turned off.



Flip the phone onto its back and remove the battery, SIM card and MicroSD card.



Remove the 8 long screws around the edge of the phone and the two short screws in the battery bay using a fine-tipped Phillips screwdriver. Be sure not to mix these screws up when reassembling!



If available, use a thin nylon guitar pick for this next step. Metal tools will mar the plastic.



Unlike most Galaxy S devices, the seam between the inner back and the front case of the Relay 4G is not visible from the back of the device. Instead it is on the front, around the perimeter of the keyboard. Insert a thin prying tool here and gently unsnap the plastic halves.



Lift the back off.



Gently disconnect the headphone jack cable. This connector is very fragile, and should not be pried on with metal tools. Instead it should be gripped with fingernails and slowly pulled upward.



Disconnect the screen cable along the left side of the board. Like the headphone jack, this connector is fragile and must not by forced apart. Then remove the 5 short screws which hold the PCB to the front frame.



Gently lift the PCB upwards. There are clips around the edge which will need to be gently pressed to free the board.



If needed, the keyboard can now be removed. To separate the keyboard frame from the screen, remove the final screw and gently pull the plastic straight up. Be sure not to put undue stress on the screen cable. It is held to the keyboard frame in the gold plate, which is attached using double-sided tape.

I did not dismantle the screen section of my phone beyond this point, but further disassembly appears to be straight forward.



To continue dismantling the PCB, gently disconnect the camera and MicroSD card socket cables. As above, these connectors are delicate and must not be forced apart.



Remove the two screws on the keypad side of the PCB to unfasten the RF plate.



Lift the RF plate off of the PCB.



The PCB is now bare.

Assemble in reverse order.



The PDFs linked to in the above document are owned by their respective companies. All else is covered by the following:

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26th March 2013, 07:43 PM |#2  
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Great thread.
Just wanted to share my picture of the broken 4G that I have.

So part of the flex cable is broken and the following things don't work anymore:
- Frontcamera
- lightsensor
- LED indicator
- normal phone speaker.

I ordered a new display that comes with a cable from here, to solve the problem, because I could't find the flex cable itself and T-Mobile didn't want to invoke a warranty case(I am in germany, that's the main reason)

Ciao fsg
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19th August 2013, 06:43 PM |#3  
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GPS antenna
I'm not happy with my phone's GPS, the reception quality is really poor. I've found several threads discussing the problems with Samsung's phones' GPS antenna contacts, e.g. this:

http://forum.xda-developers.com/show...php?p=39570338

So I've disassembled my Relay and found those contacts after experimenting without any antenna attached. The picture is below.

I've gently bent the PCB contacts toward the rear panel to make sure they will touch the antenna pads with pressure. The GPS works much better now. In case if it'll not last long, there is a possibility to solder them with tiny copper wires.
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26th August 2013, 02:41 PM |#4  
dillalade's Avatar
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Great thread.

But does anyone have experience or insight they can share as to how to dismantle/reassemble the front fascia/housing surrounding the screen.

Mine is mashed up and needs replacing, my replacement housing arrives tomorrow.

Thanks in advance

Sent from my SGH-T699 using XDA Premium 4 mobile app
3rd September 2013, 02:35 PM |#5  
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Just received my Relay yesterday, planning to do some surgery on it to add Palm Touchstone charging to it.

I can't really tell from the photos if it's a separate board, but I found this on eBay:

http://www.ebay.com/itm/Charging-USB...-/151050168018

I don't want to solder on the original parts so if that's the right part I'll grab one and solder on that instead?

Thanks.
3rd September 2013, 05:40 PM |#6  
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Quote:
Originally Posted by ToniCipriani

Just received my Relay yesterday, planning to do some surgery on it to add Palm Touchstone charging to it.

I can't really tell from the photos if it's a separate board, but I found this on eBay:

<link>

I don't want to solder on the original parts so if that's the right part I'll grab one and solder on that instead?

Thanks.

I don't think it's related to Palm Touchstone in anyway, from the link you posted:

...OEM USB charging For Samsung Galaxy S Relay 4G T-mobile SGH-T699
...
...3. Replace your broken, damaged, cracked, unusable

So, by my understanding it's just a replacement board for the regular USB charging.

The wireless charging is not possible without a special "antenna" - a coil regularly attached to the back cover, e.g. see:
www ebay com/itm/Samsung-Galaxy-S4-Wireless-Charging-Back-Cover-Touchstone-Dock-White-/161017497675
(please replace spaces with dots, I can't post links at the moment)
3rd September 2013, 05:58 PM |#7  
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Quote:
Originally Posted by aragats

I don't think it's related to Palm Touchstone in anyway, from the link you posted:

...OEM USB charging For Samsung Galaxy S Relay 4G T-mobile SGH-T699
...
...3. Replace your broken, damaged, cracked, unusable

So, by my understanding it's just a replacement board for the regular USB charging.

The wireless charging is not possible without a special "antenna" - a coil regularly attached to the back cover, e.g. see:
www ebay com/itm/Samsung-Galaxy-S4-Wireless-Charging-Back-Cover-Touchstone-Dock-White-/161017497675
(please replace spaces with dots, I can't post links at the moment)

No no, that's not what I'm getting it for. I just want to make sure that is indeed the USB board for our phones, since the pictures seem to indicate the port is actually on the main PCB. If it is a separate board, I rather solder on a separate piece rather than the one that's on the phone.

I'm scavenging the coil from my old Pre, then tapping the volt line into USB. That's how it was done on the Nexus S and EVO 4G.
3rd September 2013, 08:02 PM |#8  
Jax184's Avatar
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For future reference, that auction is NOT for the Relay. It's for some random phone. The Relay's USB port is soldered straight to the mainboard. Anyone with a broken USB port should NOT order that one from eBay.
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3rd September 2013, 08:17 PM |#9  
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GPS antenna
Quote:
Originally Posted by aragats

I'm not happy with my phone's GPS, the reception quality is really poor.
...
So I've disassembled my Relay and found those contacts after experimenting without any antenna attached.
...
I've gently bent the PCB contacts toward the rear panel to make sure they will touch the antenna pads with pressure. The GPS works much better now. In case if it'll not last long, there is a possibility to solder them with tiny copper wires.

Replying my own post just to confirm: after extensively using the phone's GPS the last 4 days in wildernesses (without any data channel available) I can confirm, that there is a HUGE difference between "before" and "after". Now GPS locks satellites in 2-3 seconds, I had no problems in deep forests and narrow canyons.
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14th January 2014, 11:26 AM |#10  
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Quote:
Originally Posted by Jax184

I've only had my Relay a week and already it's been torn apart! But what's bad for warranties is good for you, because now I can make a hardware reference guide for this phone like I did for the Sidekick 4G.

Thanks for the great guide!

I experienced that after some drops the screen-unit and the keyboard-unit of the device get more and more loose. One unpleasant effect is, that if the slider is closed and I tap the screen, the screen unit yields a bit due to a too big gap between screen unit and keyboard unit. It rattles, when I write s.th. on the virtual keyboard.

I did not understand from the guide, which screws I have to tighten, to solve this issue. I'd be very grateful for any ideas.
Thanks!
27th July 2014, 05:23 PM |#11  
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Quote:
Originally Posted by fsg4u

Great thread.
Just wanted to share my picture of the broken 4G that I have.

So part of the flex cable is broken and the following things don't work anymore:
- Frontcamera
- lightsensor
- LED indicator
- normal phone speaker.

I ordered a new display that comes with a cable from here, to solve the problem, because I could't find the flex cable itself and T-Mobile didn't want to invoke a warranty case(I am in germany, that's the main reason)

Ciao fsg

Please, do you remember having relay dissasembled? Is it possible to change the display flex cable from other device (e.g. with cracked display)?

Thank you very much for you answer, I'm having probably the same problem with the relay (too much keyboard opening I suppose...)
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