Warning: this mod requires special skills in opening the device, and soldering, please do not do it unless you know how to do it, I'm not responsible for any damage that may happen to your self or your device, this mod will void your warranty.
I've been searching the internet for the last month, searching for a solution for the poor WIFI performance of the A7HD (and many other Allwinner A10 tablets)
I've tried many different antenna designs such as:
http://fabiobaltieri.com/2012/06/02/diy-cheap-internal-wifi-antenna/
and this (without the reflector)
http://img.engadget.com/common/images/3060000000054059.JPG
i also did the original antenna mod
this:
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but with all of these mods, the WIFI performance is still weak, untill i found this video on you tube:
http://www.youtube.com/watch?v=nli8nO8PNzM
this guy have gone the extra mile, and as he explained, the manufacturers had put two resistors between the antenna (positive) lead, and the ground
all i did was removing one resistor
now with the original antenna (with the original antenna mod) , i have wayyyy better WIFI, faster, and more stable, before in my next room where the router is, i was getting 1 bar of WIFI signal, now i have 3 bars, and some time 4 bars .
i didn't remove the second resistor (just as the video) but i think removing it will make it slightly better (if any one could do it and report back the results).
Related
Hi,
I'm thinking of removing the Camera unit from my phone as camera mobiles are not allowed in my office.
http://www.ifixit.com/Teardown/Samsung-Galaxy-S-4G-Teardown/4977/1
http://www.ifixit.com/Teardown/Samsung-Galaxy-S-I-9000-Teardown/7122/1
http://www.ebay.in/itm/Opening-tool...4?pt=LH_DefaultDomain_203&hash=item416585c42c
Based on this, I'm confident that I can remove the camera from the mobile. But after removing the entire chip, will the phone have any trouble in booting?
I mean, while the phone is booting, will it be looking for camera unit and will fail in booting if there aren't any camera units found? I know this doesn't make any sense, but still I don't want to take any chance....
XDAians please shed some light on this topic! Also if you have any tips on removing camera, please share your information.
Thanks
Removing the camera is very easy if you know how to take the phone apart (don't break the tabs on the chrome trim).
And the phone will boot just fine.
This is my first time removing the panel. Hope it is as easy as you say.
And I'll look out for that tabs on the chrome trim.
i have changed the Mainboard a few weeks ago.
The hardest work was to split the cover.
Here the guy use a tool
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i suggest to use your fingernails.
Second, there is a small white cable between mainboard and the board in the bottom.
Don't crush it, when you reassemble the phone.
Opened up an old PC on a stick to see what I could do to improve wireless signal and ended up breaking off what appears to be a part of the wifi antenna however I have no idea what it is correctly called, a few google searches and I come up short. I want to know what the part is called so that hopefully I can find out how to reattach it.
The part looks like a gold color pin that pushes in, sort of like a micro plunger. When the case is put back together there is a metal plate on the case that makes contact with this pin to create an antenna of sorts.
I would just solder it back on but I can't make out any metal contact left to solder to on the spot where it broke off from.
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Howdy mate,
That's a surface mount pogo pin, Lson is a company that makes them, you could probably salvage one if you could find an old car kit or phone charger from the late 90's. You could also replace it with a piece of springy steel from a battery terminal but that might affect the antenna wavelength.
Tetsuo
Thank you!
That is exactly correct
NOTICE
I do not take any responsibility and I am not liable for any damage caused by following this guide. You are doing at your own risk. BE CAREFUL.:angel:
What will you neeed to complete this task?
1. LG G3
2. Solder gun
3. 60/40 rosin core leaded solder
4. A small amount of patience
Picture below shows where you need to place new solder points. They are just right in the red circle.
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source: hurtowniagsm.pl
Solder should look like 2nd one counting from right, about 1/2 shorter and bit flatter.
source: learn.adafruit.com
Now it is time to reseat pins height since they will need to stick to new solder point. I marked for you those pins and all you need to do is raise them a little bit, not too much or they will break apart, just do it gently.
source: repairsuniverse.com
THE END
If you did it properly your GPS fix should be much faster and more accurate than ever.
Results
before
Accuracy: 12-25 m
8-12 satellites available
after
Accuracy: 3-12 m
16-21 satellites available
Thank you for reading and please leave a comment with results.
My Tab A 9.7 has lines/flickering through about 75% of the screen (closest to the home button). The screen is still usable (though barely at times) and fully responsive to touch. I've seen some reports of a loose connection internally, but nobody seems to have the same issue as I do. Some pictures are below:
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Any idea if this is repairable/what the fix would be?
Hello
First of all, if you did drop it from a considerable hight it ma be a loose connector, if not, did you flash something and after that the screen started making this lines ?
Your best move will be checking your warranty, if it doesn't apply to your tab any more, try opening it and checking for any loose connectors, mainly the screen ribbon, before that try to look for a teardown instructions for the tab, sometimes they put the cables in places where it's easy to damage if you open the device without any knowledge of how to do it safely.
I had a similar problem on a samsung phone and in my case the screen was faulty, it shows flickering bright lines just like your tab. Replacing the screen fixed the issue.
Good luck
If you broke or dropped the device, then that might be the problem. If not, then it's probably because of the firmware.
If you have not broke or dropped the device, then go to Updato.com and press OS Updates and then type in your device model and it should take about 5 minutes or more to download.
Hope I helped.
You ever wondered why you have a poor DAB signal?
Maybe you're using such an USB charger from hell:
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I had suddenly a poor DAB signal. But not just no signal. Depending on the places I drove, DAB reception was terrible. Lots of dropouts but depending on the location I thought it was the antenna or the USB DAB box. Sometimes DAB signal was perfect and signal status indicator was dark green.
Then I removed the USB car charger. And what should I say? Perfect reception and it is again a pleasure to listen to the radio. So the interference is only a problem if the DAB signal is not 150% which makes it difficult to identify the root cause.
I have researched and there are many people who have identified a troublesome USB charger. These devices from hell are even poison for OEM head units of high-end brands like Mercedes any BMW.
Since I have not found any information in this forum, I would like to share these finding with you.
Stay healthy and drive carefully!