Wifi antenna - OnePlus X Q&A, Help & Troubleshooting

Hey guys, long time reader, first time poster here (and it's a long one too).
My OnePlus X is my daily driver and I was planning on using it for some more years if this is fixable
Recently the USB port started to fail, so I decided to replace the part. A little setback was that i also had to replace the GSM antenna cable, which I had damaged during disassembly. So far so good, the phone is now charging again and reception and mobile data are working fine.
However, ever since the repair my Wifi reception has gone to ****, it is now so bad that it's pretty much unusable even when right next to the router. I've come to the conclusion that this is not a problem with the antenna cable replacement, as removing this cable only kills cell reception, wifi is unchanged. You can see the cable i'm talking about running into the long side of the frame in the bottom of this
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, with the golden connector on the lower edge of the motherboard (the other side connects to the USB flex cable, under the metal housing on the right). I believe the Wifi chipset itself is contained within the small housing in the upper middle of the board, with the + sign.
So now on to my question:
Does anyone know where exactly the wifi antenna on this phone is located? I'm assuming that it is being routed into the plastic/metal housing cover that's over the mainboard. I've made sure that none of the pins on the motherboard that connect to the housing cover are missing/bent or corroded. I've angled them up a little bit and cleaned them with alcohol to ensure a good contact.
But still, no wifi. Is it possible that the wifi chip itself got damaged in the repair and is there any way to find out?
Hopefully someone here knows something useful, I would be eternally grateful

Did you ever find a fix? I am having similar problems for one plus 3t

No, zero news on that front. I did some superficial research but was unable to pin-point the fault. I had to replace the phone, sadly.

Related

needed part

Is there anyone who has an archos 70 internet tablet 250 gb with a broken screen and want to sell it?
i dont't have one - but it would be easyer to help u if u would tell wich part u need
i need the main cable that connects the screen with the main board thanks for your reply. i am searching everywhere
well that shouldn't be to hard...
they are called Flexible flat cable
u should get em on ebay or at your local electronic store
The only thing u have to research on your own is the connector type (at mainboard side). But that shouldnt be to hard - imho is should be one of the default connectors for those cables - even im not sure.
Maby "scholbert" knows... u could ask him.
Count the pins and try to buy one - no need for a full device
thanks for your advice but the this cable have other connection on it too is not so simple thanks...
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well the picture is quite small - but I can see it's a bit different "style" then in my 101...
Anyway as there shouldn't be lines carrying combined signals - it still should be possible to rebuild that...
I fear that's the only way u have atm - since we don't know any reseller for replacement parts as far as i know - I saw quite a few people now asking for different things batteries, digitizer, display,...
But the only solution was to take it from broken device each time (besie I saw some sceen without digitizer around)
wich leads to ebay,.. but most time they are not "that" cheap...
yes i am waiting on ebay for something for me but may someone has something here
here is a bigger picture of the cable. i am going to take another picture where the actual problem on the cable is tomorrow.
here is my actual problem one of the bins in my Flexible flat cable is destroyed.
thanks for your help.
help!!!!!!!
any good news guys??????

[Q] Does galaxy s2 like beer?

Hi, a friend dropped a glass of beer on his galaxy i9100. Phone looks dead but when he give it to me i've tried another battery and the phone turns on with apparently no problem. So he bought another new original battery, put on and charge the phone. But, temperatures reach critical level and the phone stopped the charge. The temperature raise even without charge with battery in and phone on. So i disassembled and scan for damaged components or some trace of "beer" but the phone looks clear. I then sprayed with a product similar to wd40 (we call it crc in Italy, removes dirt and clear electric contacts) and wait for dry. But same problem. I turned on the phone partially disassembled and the heat is concentrated in the flex hook of the frontal buttons but probably the heat comes from the chip near that.
unfortunately there is no code on that chip so i hope you can understand wich i'm talking about. The only thing is that i don't really know if the heat is from that chip or the flex hook, i don't know how to test it. Looking at it there is no sign of damage. Any advice?
Hope you can understand the problem and apogologize for bad english
ps: with the crc the temperature focused on that chip, before that all the charging flex was over heating
Just post a picture.
Are you talking about the usb/mic board.
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this is the place where heat reach is max
no ideas? i cleaned the phone completely and nothing changed
All I can say is you look through previous posts about motherboards and see if anyone has an old board you could get.
I dont know how easy it would be to change that component your after.
I dunno about beer but mine (GT-I9100P) had a couple of vodka baths and it still works impeccably. (and when I say baths, I say full glass spilled on it)

[Q] Tablet mainboard integrated circuit getting really hot

Hello,
Background:
I have a G-Tab that I've had for a while. I started noticing that the case would get really hot when charging. I removed the back cover, and felt the batteries and the felt fine to the touch. I then touched one of the integrated circuits (see images) and burned a nice rectangle into my finger tip. This chip and the other one of this type on the other side of the board get really hot. I haven't kept the tablet unplugged for several days now in fear this chip will "blow" and possibly take other components with it.
These chips are marked as:
7C9F 359
As shown in the second image. Both sides of the mainboard have this chip, and both get hot; as shown in the third image.
I also have a Cube U30GT2 that has a chip similar to this one, but marked as:
2015CS AD1364.
These seem to do something with voltage regulation. The ones on the G-Tab board are near to the full sized USB, and the Mini-USB plugs. The one on the U30GT2 is coming off the battery connection.
Now to my Question:
Can anyone help me identify these chips, and what they do; and, for bonus points, possibly tell me what can be done to fix this issue?
So far, I've checked for shorts between the pins on the chips on the G-Tab board; between the power plug and the ground plane and found none.
I have also looked for reference USB circuit designs to take a look at what those reference for these types of chips. I downloaded the Tegra 2 Technical Reference manual, but that only shows block diagrams of the USB interfaces.
Thanks in advance for any help provided.
Images:
Image 1:
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Image 2
Image 3
The charging circuit in these tabs is what is known as a linear regulator that will produce heat because it's dropping the difference between the charger voltage and battery voltage. Make sure that you don't use anything but a 9V charger.

[Q] HTC Jetstream Bent pins... Anyone done repair on one yet?

I have had it for years, love it, I let my mom borrow and she tried to force the charger in upside down. Anyone have any info on replacing the usb/charger port? pics, advice, prayers, anything would be better than going in blind. I have not opened it yet, but is the footprint the same as a micro-USB (which I am kinda assuming) could I possible just replace the usb with micro-USB port?
thanks in advance
cheers,
disco
dock charging board replacement
disco_y2k said:
I have had it for years, love it, I let my mom borrow and she tried to force the charger in upside down. Anyone have any info on replacing the usb/charger port? pics, advice, prayers, anything would be better than going in blind. I have not opened it yet, but is the footprint the same as a micro-USB (which I am kinda assuming) could I possible just replace the usb with micro-USB port?
thanks in advance
cheers,
disco
Click to expand...
Click to collapse
1)buy parts from here:
parts4repair.com
2)select DOCK CHARGING BOARD
3)buy the right one ( one without 4g antena OR the one with if you have 4g tablet )
4)repacement is easy but repair with patience and slow.
5) have fun
for info : i have repaired once so i know it works
disco_y2k said:
I have not opened it yet, but is the footprint the same as a micro-USB (which I am kinda assuming) could I possible just replace the usb with micro-USB port?
Click to expand...
Click to collapse
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I've indicated which three connections that you will have to unplug -- in addition to unscrewing the charging board. The only two tools that you should need are a pry tool (a knife will probably do) and a Philips or Frearson screwdriver.
i had the same idea of doing that, but as far as i know that is impossible

Have a big problem with g5 board please help me ?

Hi
I dissassembled my g5 a few days ago for observ the warming location. then. while I am trying to put battery and bottom part. I broke the motherboard plug pin piece. two pins. its antenna connection. I dig into this with my bad soldering iron. I ruined some ways and some smd cap. Now can you explain it from the picture. could we make new ways and could we put the smd s on its places or new places. I cant find the schematic of board.
Could you explain schematic where only this broke location. ?
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I have the same problem trying to repare the screen from my girlfriend old phone. The screen is now replaced, but I broke this tab during the disassembly. Now the phone cant make or receive any calls or sms.. It can search for service but cannot log onto them. So, I looked on the pcb with my multimeter and find the 2 connections to make. Ill try to solder it back together.
thesebroy said:
I have the same problem trying to repare the screen from my girlfriend old phone. The screen is now replaced, but I broke this tab during the disassembly. Now the phone cant make or receive any calls or sms.. It can search for service but cannot log onto them. So, I looked on the pcb with my multimeter and find the 2 connections to make. Ill try to solder it back together.
Click to expand...
Click to collapse
Good, this thread isn't too dead Did you have success with soldering them back? I'm thinking of shipping mine to a repair shop with microsoldering technology.
Hello,
I'm repairing PCB's for a hobby, and my opinion would be ...
just buy a new Mainboard, they schould be unter 90$(new), repairing would be more expensive, even if it is "only a few components".
The two pins on the top right are mechanically important to connect into something, it will be really hard to get those strong enough, if they're broken.
Without a datasheet i would guess those caps, could be bypass caps, and maybee the're not really needed.
hello,
while fixing my gps I broke the same thing, the antenna pins connecting to the chin. ???
Has anyone managed to fix this?
Regards

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