Latest product reviews
ARCHOS 50 Diamond
ARCHOS GamePad2
ARCHOS
Smartphones
ARCHOS
TV Connect
ARCHOS 101 XS

A A A
Avatar

Please consider registering
Guest

Search

— Forum Scope —






— Match —





— Forum Options —





Minimum search word length is 3 characters - maximum search word length is 84 characters

Register Lost password?

ClockworkMod (CWM) Recovery easy install for RK3066 and RK3188 -- TWRP/CWM Flash-Tool and root for RK3288

 Please donate to support OMA and CrewRKTablets firmware work, thank you !

sp_Feed sp_TopicIcon
Cube U30GT 2: Poor WIFI signal. How to fix it?
Avatar
busbus
New Member
Forum Posts: 1
Member Since:
2013/05/24
sp_UserOfflineSmall Offline
1
2013/05/26 - 18:29
sp_Permalink sp_Print

Hi,
My Cube U30GT 2 has very poor WIFI signal. I tried all FW and roms (from Android 4.1.1 to last 4.2.2).
On all roms was very poor WIFI signal.

My router is alright. Other davice works prefect.

So, Is it a software problem Or is it a hardware problem? 

Thank You.

Avatar
mikejaff
New Member
Forum Posts: 1
Member Since:
2013/04/25
sp_UserOfflineSmall Offline
2
2013/05/27 - 10:52
sp_Permalink sp_Print sp_EditHistory

cid_image011_jpg@01CE587D-1.jpgImage EnlargerI bought 3 of these for me & for friends. 2 worked perfectly, but one had very bad wifi connection problems. More than 8 feet away from the router, or not in line of sight to it, and there was no signal. After looking at youtube videos of general wifi issues with Chinese tablets I thought the problem was the wifi antenna connection to the motherboard. On opening the tablet an engineer noted a large blob of solder on the central wire of the coax cable which had melted the insulation across to the shield cable-thus shorting the antenna. Just like you can get a good tv picture with a coathanger as an aerial if you are in a strong signal area-here you are getting the same good wifi signal with a shorted aerial, but no range. If you have a bad wifi signal problem-return the tablet to China for repair, or try a local electronics repairer (youtube video of how to disassemble available)-you will of course invalidate the warranty but it will be cheaper than sending it back. Postage alone would be £30. The lack of a proper warranty is a risk you take when buying direct from China-it's why they are so cheap. Otherwise the tablet is brilliant, even with the standard v1.05 firmware.

sp_PlupAttachments Attachments
Avatar
fana75
Active Member
Forum Posts: 30
Member Since:
2013/05/11
sp_UserOfflineSmall Offline
3
2013/05/28 - 09:01
sp_Permalink sp_Print sp_EditHistory

Hi

Did someone try to open its cube and do this?

I order a torx T2 screwdriver on the web to open my cube and see  how the soldering has been done on the coax...

Once the tool received and if the soldering is not good i will tryc to imrove it at work...

Regards

PS: for information many pictures are avaliable there:

http://tablette-chinoise.net/ouverture-de-la-cube-u30gt2-t1422

Avatar
xasteras
New Member
Forum Posts: 2
Member Since:
2013/05/27
sp_UserOfflineSmall Offline
4
2013/05/30 - 16:25
sp_Permalink sp_Print

Please try to attach some photos if you find something is wrong with soldering


Avatar
geloczigeri
Hungary
New Member
Forum Posts: 10
Member Since:
2013/05/09
sp_UserOfflineSmall Offline

Thanks Received: 5
5
2013/06/03 - 23:51
sp_Permalink sp_Print sp_EditHistory

fana75 said
Hi

Did someone try to open its cube and do this?

I order a torx T2 screwdriver on the web to open my cube and see  how the soldering has been done on the coax...

Once the tool received and if the soldering is not good i will tryc to imrove it at work...

Regards

PS: for information many pictures are avaliable there:

http://tablette-chinoise.net/ouverture-de-la-cube-u30gt2-t1422

 

Hi!

 

I have fixed my WiFi signal issues by replacing the internal antenna with a new one. I think the original antenna is not good enough (maybe its geometry is bad, see my pictures below).

The second (and most important) issue is the metal strip around the case. It totally blocks WiFi signal horizontally. I have tested the WiFi reception without this metal strip and the signal was good. If I put it back, I've lost the signal immediately. So if you want the best WiFi signal, remove that metal strip. The antenna is next to the speaker on the right side of the tablet.

Another thing (the third issue). I have removed a metal piece too to improve signal quality, it was next to the WiFi antenna inside the tablet.

I have created a few pictures, you can watch them here in high resolution.

 

 

The following users say thank you to geloczigeri for this useful post:

ebeb2 U30GT2, Meewind
Avatar
ebeb2 U30GT2
Australia
Active Member
Forum Posts: 36
Member Since:
2013/04/30
sp_UserOfflineSmall Offline

Thanks Received: 9
6
2013/06/04 - 00:56
sp_Permalink sp_Print

Hi Gelo,

Thank you for your post.

 

I also have wifi problem but i dont have the knowledge to replace the antenna . Is there any other mods that i can do with the wifi antenna to make it better. I have read in some stick  copper or aluminiumstrips  around it make it better. Does it really work? Can you please help me. 

Thanks in advance

Avatar
xasteras
New Member
Forum Posts: 2
Member Since:
2013/05/27
sp_UserOfflineSmall Offline
7
2013/06/04 - 01:26
sp_Permalink sp_Print

Where did you buy the antenna?

Avatar
Chris_W
New Member
Forum Posts: 8
Member Since:
2013/05/17
sp_UserOfflineSmall Offline

Thanks Received: 6
8
2013/06/06 - 16:13
sp_Permalink sp_Print sp_EditHistory

 Hi!   I have fixed my WiFi signal issues by replacing the internal antenna with a new one. I think the original antenna is not good enough (maybe its geometry is bad, see my pictures below). The second (and most important) issue is the metal strip around the case. It totally blocks WiFi signal horizontally. I have tested the WiFi reception without this metal strip and the signal was good. If I put it back, I've lost the signal immediately. So if you want the best WiFi signal, remove that metal strip. The antenna is next to the speaker on the right side of the tablet. Another thing (the third issue). I have removed a metal piece too to improve signal quality, it was next to the WiFi antenna inside the tablet. I have created a few pictures, you can watch them here in high resolution.

Where did you buy the antenna ?

Did you connect the new antenna at the MB, or just remove the original antenna and reuse the same wires ?

Can you show photos of where you made the connection, the MB or the back of the new antenna ?

How did you remove the metal strip inside the tablet ?

 

Here is a video showing how to disassemble the U30GT, I am sure the U30GT2 is the same, it shows removing the metal strip. 

 

Thanks

 

Chris

The following users say thank you to Chris_W for this useful post:

scotslad
Avatar
Meewind
New Member
Forum Posts: 10
Member Since:
2013/05/24
sp_UserOfflineSmall Offline

Thanks Received: 3
9
2013/06/07 - 17:10
sp_Permalink sp_Print

So what do I see on those pictures?

The second picture: I see a metal piece with a black soldered wire on top of it. I assume that is the old antenna you removed.

The 5th picture: I see an transparent orange plastic on which a metal thing is glued, that I assume is your new antenna. I also see on that picture that you have removed a piece of metal (on the right of the picture,  is a gap that was not there on the second picture).

That is correct?

I wonder what the results will be if you would just take away that part of the metal strip that is right next to the antenne.

 

Thanks for posting these pictures, BTW, very informative! :-)

The following users say thank you to Meewind for this useful post:

thedadio
Avatar
geloczigeri
Hungary
New Member
Forum Posts: 10
Member Since:
2013/05/09
sp_UserOfflineSmall Offline

Thanks Received: 5
10
2013/06/11 - 02:22
sp_Permalink sp_Print sp_EditHistory

Hi!

 

First of all, sorry for my poor english :)

 

[I have uploaded more pictures to here!]

The pictures in order:

  1. The tablet's case. I have marked the antenna's position with red. As you can see, the metal strip is strongly blocking the signal. Of course its nice, but please... Where were the engineers at the design plan?
  2. Case opened, overview. Be careful when removing the back of the tablet, because you can easily break the camera. The camera module is glued into the cover, but it can be removed with a knife or a small screwdriver. Its cables can be damaged easily too.
  3. Camera electronics and its chipset. Here is the antenna cable connection to the motherboard. It requires soldering if you want to replace the cable. It could worth a shot, but I kept the original cable, it was good enough.
  4. The original antenna in its original position. There is a metal piece on its right (what I have removed later). The antenna's geometry is not so good I think. It is just a piece of metal what wants to be an antenna, but its not a good choice.
  5. One of the two battery packages. Nice parameters. So there are two 7.4V 3600mAh battery packs. I think these in parallel, so we have 7.4V, 7200mAh. Its not 10000mAh what marketing said, but still enough :) And its clearly true you cannot charge these packs from a USB port. The USB2.0 specification says a port can give 5V, 500mA. Its just not enough for the tablet, because the charging time would be almost a day (23.5 hours if I calculated right and the efficiency is around 90%).
  6. Removing original antenna in progress. I've just cutted the tape what held the antenna. This tape is glued onto the battery so it was easy to remove it. Just pull out the antenna, there are no screws.
  7. Original antenna from other view.
  8. New antenna in the tablet above the metal strip in vertical. Its geometry is more detialed compared to the original antenna. If you want the best WiFi signal, do not put back the metal strip (aluminium strip?) around the case. The metal strip on the right of the antenna is missing now, because I removed it to improve the signal quality.
  9. New antenna from top. I have used the original cable and just soldered the antenna to it.

 

I've ordered the new antenna from eBay, you can find it easily by searching internal laptop antennas. Good to have a flexible like this one, because I could put it into the tablet easily.

 

[Here is the video what shows how to open the case]

 

The following users say thank you to geloczigeri for this useful post:

Baeckman, scotslad
Avatar
fana75
Active Member
Forum Posts: 30
Member Since:
2013/05/11
sp_UserOfflineSmall Offline
11
2013/06/11 - 11:48
sp_Permalink sp_Print sp_EditHistory

Dear geloczigeri

Thank you for your explanation....

What Torx did you use: T2 or T3?

Doing this mod improve the Wifi for sure?

No more signal loses or poor speed?

Regards

 

Avatar
geloczigeri
Hungary
New Member
Forum Posts: 10
Member Since:
2013/05/09
sp_UserOfflineSmall Offline

Thanks Received: 5
12
2013/06/11 - 21:19
sp_Permalink sp_Print

fana75 said
Dear geloczigeri

Thank you for your explanation....

What Torx did you use: T2 or T3?

Doing this mod improve the Wifi for sure?

No more signal loses or poor speed?

Regards

 

Hi!

 

I had no wifi signal in my kitchen. After I have replaced the antenna, I could browse the internet in the kitchen and there were no signal loses.

If I removed the aluminium strip from the case, the signal quality was really good.

I have used T3 Torx.

 

Regards

 

Avatar
Chris_W
New Member
Forum Posts: 8
Member Since:
2013/05/17
sp_UserOfflineSmall Offline

Thanks Received: 6
13
2013/06/12 - 04:17
sp_Permalink sp_Print

I just removed the metal strip around the tablet, signal increase was 15+ dbm.

I picked up a router that I have NEVER picked up on any wireless device.

I was sitting in my living room the same place I normally use a wireless laptop and this tablet.

 

Avatar
fana75
Active Member
Forum Posts: 30
Member Since:
2013/05/11
sp_UserOfflineSmall Offline
14
2013/06/12 - 10:33
sp_Permalink sp_Print

"aluminium strip"

geloczigeri which aluminium strip you are talking about?

The metal strip around the tablet?

regards

 

Avatar
Chris_W
New Member
Forum Posts: 8
Member Since:
2013/05/17
sp_UserOfflineSmall Offline

Thanks Received: 6
15
2013/06/12 - 15:45
sp_Permalink sp_Print

fana75 said
"aluminium strip"

geloczigeri which aluminium strip you are talking about?

The metal strip around the tablet?

regards

 

Yes, its the aluminium strip around the tablet.

It is held on by the screws holding the side strip on.

Once you take those out the aluminum strip can be taken off, you don't have to take the side strip completely off, once the screws are out the piece that goes around the rest of the tablet will slide out from underneath the side strip.  You will have to pull it gently, there are tabs that old it to the other 3 edges of the tablet, but they come out easy.

Its the 1st thing they do in the video above.

 

Chris

 

Forum Timezone: Europe/Paris

Most Users Ever Online: 749

Currently Online: J_A_G
179 Guest(s)

Currently Browsing this Page:
1 Guest(s)


Devices in use: Desktop (159), Phone (19), Tablet (2)

Top Posters:

Oma7144: 5664

globula_neagra: 2424

finless: 604

DarthJabba: 551

exelletor: 450

JochenKauz: 450

cracktech: 430

maikal: 394

Newest Members:

ilocanux

pielemansjozef

servicehy

J_A_G

kraven234

cmwb

Forum Stats:

Groups: 10

Forums: 185

Topics: 5884

Posts: 58444

 

Member Stats:

Guest Posters: 43

Members: 255393

Moderators: 5

Admins: 1

Administrators: admin

Moderators: globula_neagra, exelletor, JochenKauz, Oma7144, cracktech


CrewRKTablets moderators: JochenKauz and Astralix