So I ordered an external antenna for a USB modem that I use in my home, and I got curious. I attached the adapter to BOTH of the connectors individually to see how my service would improve, and I think it was a mistake.
I get no service whatsoever now. I actually have to put my phone up to the signal booster I have in my phone to get any service at all.
Luckily, I had another S4 and I changed out the motherboards so I didn't have to go without a phone.
I'm wondering if there's anything I can do to restore the functionality of the other motherboard's radio. Even if it means DIYing a solution.
Below is an image of the connectors that I attached the external antenna to. Can anyone help?
It doesn't look good:
http://forum.xda-developers.com/galaxy-s2/general/external-antenna-socket-warning-t1273292
You have damaged the connectors inside the antenna socket (very easy to do, as I found out). This has switched off the internal antenna and you have four basic options:
1. If under warranty, return it and hopefully they won't notice you messed it up and replace the motherboard.
2. Rig up a permanent external antenna using copper (or other) wire.
3. Fill the socket with solder to rejoin the connectors and re-enable the internal antenna.
4. If 3. fails, replace or completely remove the antenna socket and solder the transmitter/receiver to the internal antenna on the board (how's your micro-soldering?)
I messed up my 3G antenna, which is in the same position as R1 on your board, but on mine it is labelled L1 and I only have one socket. Your other one is for 4G, I think, so if you have messed up both it's double trouble.
Well, I suppose I've got nothing to lose by trying this out and failing. The only reason I want the other board is for the older baseband version, and the fact that I have safestrap installed on it.
Related
Does anyone know what the connector for external antennas on the back of the wizard is called? I want to build a custom antenna that I can embed into my clothing to improve reception at school. I can't use a regular antenna since phones aren't allowed to be used at school.
HDR said:
Does anyone know what the connector for external antennas on the back of the wizard is called? I want to build a custom antenna that I can embed into my clothing to improve reception at school. I can't use a regular antenna since phones aren't allowed to be used at school.
Click to expand...
Click to collapse
The antenna part is:
P/N:36H00341-00M "Antenna Pre-Assy, AMPHENOL, GAN40023, PRODIGY"
I am attaching 2 pictures, the first you can see the Antenna Assembly (silver chunky thing above the case) and a second picture of the main board. You can see the brass connector just above the bar code.
This connector type is an AMPHENOL (brand) FME...at least it should be. One of these days I'll get and antenna.
--M
PS when you get the antenna, get a connector that at least has a 90degree bend in it. You might want to try http://www.wilsonelectronics.com
I have one
I grabbed one of those adapters, unfortunately, I cannot remember where. One end (FME) fits into the back of the phone with the 90 degree plug, the other end on mine is a TNC connector. I got that as I had a couple of spare antennas that use TNC.
It does improve the reception. I use the antenna's in the vehicle when on the highway to maintain reception. (I have no problems in the city)
Depending on your device, you may want to update the Radio ROM, if you haven't already. This doesn't flash/reset your phone, but does update the radio. This might resolve your problem without spending any money.
I am using the 2.47.11 Radio ROM and it did make a difference. My device is the T-Mobile MDA (Wizard). In a particular location, where I would get zero reception, I now get one bar...and that's all the difference I need.
P.S. If you do get this adapter, be careful when plugging it in and during use. Remember that FME connector is attached to the circuit board.
hi, i had an xt910 with bad mobo that didnt charge.
i swapped it with some usa variant either xt908 or xt912 not sure yet, as i can flash both roms on it.
anyway, everything works fine except gps is not getting a fix.
i read this phone has a wifi/gps combo chip, so the chip is fine as the wifi works.
i tried all the software solutions and different roms, this is not the issue i think.
what i do think happened is during the replacement of the motherboard i damaged the gps antenna connectors.
i noticed there are many small copper pins around the frame, and where i think the antenna is, the copper was dent, i tried to restore it, but i broke a piece of the pin.
and even after i "restored" to what seem a good position for the pin, i couldn't get a fix.
i looked at all the teardowns and there is no mention of gps antenna, all i could find is where the chip is, so i circled what might be the pins of the antenna.
so my last hope is try to add a copper tape/wire to the antenna so i could get a fix, but i need to know the exact location of it.
i circled in red what i think is the antenna.
im waiting for the copper tabe to fix, so in the meanwhile i would appreciate anyone that can point me to the antena direction
http://forum.xda-developers.com/attachment.php?attachmentid=2974155&stc=1&d=1413533985
I've been working on this problem off and on since the summer and have read through pretty much everything I can find (some similar posts with no resolution). After about 6 months of using a Galaxy S6, I want my Xperia back.
Long story short, I replaced the screen on my Xperia Z3V a while back. I'd already paid Sony for one screen on this phone and didn't want to do it again (wish I did). After I replaced the screen, the phone worked fine except I no longer had "proper" cell/4G signal. When I say "proper," the signal randomly appears (4 bars/-87dBm) and randomly disappears (-120dBm). I can't find any pattern to this. In some places with very good signal such as the Verizon store, the phone will try to activate but will fail to make calls or receive texts after.
List of what I've tried so far:
- factory reset
- new SIM from Verizon
- new antenna cable (blue coax cable, clips into side of phone)
- new antenna
The part that really confuses me is that disconnecting the blue coax cable has no effect. I.e., if I disconnect the cable while the phone claims to have signal, nothing changes. My assumption is that signal would instantly drop.
Is there anything worth trying before writing the phone off?
Possibly related... There is a white putty along the bottom of the battery that turns into a flat white cable which runs up the length of the battery to the WiFi antenna. Can anyone tell me what this might be? I can't find pictures describing this phone anywhere.
Thanks in advance.
I have a Z3 and the blue coax cable is the one for signal, in this case it seems either it is broken or something along those lines, as I have the same problem in my z3 but I know why because I had broken the coax connector so the signal issue. Try checking the antenna at the bottom or the connector on the motherboard itself
Neelkanth said:
I have a Z3 and the blue coax cable is the one for signal, in this case it seems either it is broken or something along those lines, as I have the same problem in my z3 but I know why because I had broken the coax connector so the signal issue. Try checking the antenna at the bottom or the connector on the motherboard itself
Click to expand...
Click to collapse
That's true. You probably damaged the coax connector on either the motherboard or the loud speaker side. The proper procedure for removing the blue cable is holding down the socket with one tool and removing the cable with another. And best is to remove the speaker module without touching the cables...
Hmm... I did not realize the coax cable was quite that fragile. Lesson learned. It seems impossible to find brand new replacements for this particular phone, I wonder if Z2 or Z3 parts would fit.
The old iPhones I've successfully replaced screens on seem like toys next to the Sony...
Hi there.
I have a G5 as my backup phone. Recently, I've replaced the fingerprint scanner (it stopped working as a button, no cleaning would help, so I've bought new part online and replaced it), and after that I have no signal (-1dbm 99asu). Not even an alarm call is possible.
From my research, the antenna module is the bottom slice of the phone, you attach the battery to (one with mic, USB-C and bottom speaker)? I have both original bottom part and a Cam+, no signal on either of them. Where else should I look for any damage, that would lead to my problem - no signal at all?
I have a similar problem. The signal is very low everywhere, I tried to clean all the contacts between the bottom part and the phone, and nothing changed.
Me too i have a problem with the signal since display change. How can i get it fix. The phone has very low signal and it has network only on 3g on LTE it hasnt any network and 2g signal doesnt have.
Изпратено от моят LG-H850 с помощта на Tapatalk
Well, the pcb or mainboard has a small flex type antena on the back of it, it's black and has some lettering on it and it connects using coaxial type push connectors, also the phone connects to the aluminum case via some exposed pins on the mainboard, the case acts as an antenna also, if you need pictures I can take some tomorrow, I work in a cellphone shop and I fix an LG g5 almost every day, we have some main boards laying around, you most likely bent one of the pins that connects to the case
nah i got the same problem here after disassemble the phone. I already clean all things that contacted with the backdoor or with mainboard but the problem still there. Only got 0-1 bar of 4g even it near the tower until it change to 3g with the same condition. but the 2g signal is always full bar.
Jc_master said:
Well, the pcb or mainboard has a small flex type antena on the back of it, it's black and has some lettering on it and it connects using coaxial type push connectors, also the phone connects to the aluminum case via some exposed pins on the mainboard, the case acts as an antenna also, if you need pictures I can take some tomorrow, I work in a cellphone shop and I fix an LG g5 almost every day, we have some main boards laying around, you most likely bent one of the pins that connects to the case
Click to expand...
Click to collapse
so is it located on the mainboard or part of screen? could you take some picture of it :crying:
Jc_master said:
Well, the pcb or mainboard has a small flex type antena on the back of it, it's black and has some lettering on it and it connects using coaxial type push connectors, also the phone connects to the aluminum case via some exposed pins on the mainboard, the case acts as an antenna also, if you need pictures I can take some tomorrow, I work in a cellphone shop and I fix an LG g5 almost every day, we have some main boards laying around, you most likely bent one of the pins that connects to the case
Click to expand...
Click to collapse
maybe post foto where is gsm ahtenna?
Hello,
A few weeks ago, I replaced my screen because my smartphone had fallen. When disconnecting the antenna cable, the coax connection on the PCB was broken. So I ordered a new PCB. However, with the new PCB, I no longer have any coverage. Is it possible that the PCB is not suitable for the European / Belgian network (GSM/Edge/3g/lte). I also noticed that the PCB I received differs a lot from the design that was in my smartphone. The PCB under the smartphone is the defective PCB, the mounted PCB is the PCB is the new PCB. You can find a picture here: https://imgur.com/Wzmq0p0 When my broken screen was still on the smartphone, I had full range and there was nothing wrong with the network. The connections of the cable is also not damaged: https://imgur.com/H4WkFmA Screenshot of no coverage, but SIM card data that is read: https://imgur.com/tkOhXI9 I tested 2 sim cards that I in the Pocophone. Both are from another provider. Neither got a signal. In my other smartphone, both SIM cards were connected to the network and worked as expected. Does somebody know if I ordered the wrong PCB foe Belgium?
Are you certain that the antenna cable is good?
If it's damaged the sim should show up but with no network at all. (Exactly the behavior that you're having)
---------- Post added at 11:30 PM ---------- Previous post was at 11:26 PM ----------
The chips' small differences are normal between an aftermarket and an original imo
ablivian said:
Hello,
A few weeks ago, I replaced my screen because my smartphone had fallen. When disconnecting the antenna cable, the coax connection on the PCB was broken. So I ordered a new PCB. However, with the new PCB, I no longer have any coverage. Is it possible that the PCB is not suitable for the European / Belgian network (GSM/Edge/3g/lte). I also noticed that the PCB I received differs a lot from the design that was in my smartphone. The PCB under the smartphone is the defective PCB, the mounted PCB is the PCB is the new PCB. You can find a picture here: https://imgur.com/Wzmq0p0 When my broken screen was still on the smartphone, I had full range and there was nothing wrong with the network. The connections of the cable is also not damaged: https://imgur.com/H4WkFmA Screenshot of no coverage, but SIM card data that is read: https://imgur.com/tkOhXI9 I tested 2 sim cards that I in the Pocophone. Both are from another provider. Neither got a signal. In my other smartphone, both SIM cards were connected to the network and worked as expected. Does somebody know if I ordered the wrong PCB foe Belgium?
Click to expand...
Click to collapse
some blue resistor is missing in new one, i think!
The antenna was damaged a bit, but i also ordereda new one with the damaged one worked.
Because the antenna cable of the pocophone was out of stock, i ordered another one from xiaomi. It was a little bit longer but, still the same issue
ablivian said:
The antenna was damaged a bit, but i also ordereda new one with the damaged one worked.
Because the antenna cable of the pocophone was out of stock, i ordered another one from xiaomi. It was a little bit longer but, still the same issue
Click to expand...
Click to collapse
In the pic it seems like the antenna cable is a bit smashed by the bezel when it was screwed together. You could try with another cable and test for signal before reassembling the phone.
I made 2 movies to show that there should be a difference and that the issue is not the antenna cable.
In this movie, I installed the new PCB and there is no networkconnectivity:
HTML:
https://youtu.be/0xNUxfh3CXM
In this movie, I installed the PCB without COAX-connection for the antenna, but just tape. I'm using is now with tape for about 5 days:
HTML:
https://youtu.be/NIRFgzkucUk
Does anyone have an idea, where to fine the correct PCB to use in Belgium (Europe)?
I contacted the company, but they only say they buy it from "Iparts Buy".
Any help would be appreciated.
Did you ever get this issue resolved. I'm having the same problem
Hey
Here is a link to a trusted shop in Germany (mobiltec24). I can't post a link. I'm a new member.
I have the same problem as you. I am also looking for a solution. I buy a pocophone without mobilenetwork. I can't unlock the bootloader without SIM Card.
Having the same issue, any update ?