Develop Bugs

'No GSM' repair trying. Direct programming K5D5657ACM

First of all, sorry if my english is not very good. I'm from spain and I have a Universal that suffered a power failure during gsm flashing and the gsm bootloader was corrupt. It shows the message 'No GSM' during startup and i couldn't find the way to repair... Not possible to reprogram gsm firm, didn't work trying to Unlock, no SuperCID and it seems that neither Jtag (i read that jtag on Universal isn't connected to the gsm chipset).
So... i thought about programming the ROM chip of the GSM module directly accesing it's pins in the PCB. The main problem: this SMD chip has its pins under its body, like a typical PC main processor and not along its borders, so, the only way to see what points on the PCB could give us access to the concerned pins in the ROM, would be unsoldering it... ufff... not an option, but... when I was having a look at the PCB's pictures for the JTAG from the wiki...... Bingo! A completely naked PCB picture! But... oops, the zoom square of the JTAG zone, is just over the conducting paths i want to see!!!
Please! It would be fantastic that the person who made that picture, make another one, where i can see the whole gsm module to track the paths... even better if i could see the opossite side. But doesn't matter if don't!
This ROM employs an electrical protocol very similar to other ROMs and I think It should't be dificult to program using a PIC or similar to drive signals, data and timigs, just to read or write it "as a whole", secuentially. Of course if i find the way I will pos it here with details for everyone.
Thanks in advance! I'm fascinated with your work!

JTAG for radio chipset? I tried to find it but no luck, old problem with hermes/universal. I tried reworking the qualcomm 6250 but nothing. Chip you are talking about is BGA not SMD, and it is very hard to remove it.

external wifi antenna

is it possible to make an external wifi antenna on our device?
crazy right?
calling hardware hackers out there.....

creso said:
is it possible to make an external wifi antenna on our device?
crazy right?
calling hardware hackers out there.....
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Click to collapse
Why would you want to do that?

Why would you want to do that?
coz of this link..check it out...
http://pdaclub.pl/forum/zrob-to-sam...d/?PHPSESSID=e1ef7e2e316f21bce15dfb414f4de5ec

creso said:
Why would you want to do that?
coz of this link..check it out...
http://pdaclub.pl/forum/zrob-to-sam...d/?PHPSESSID=e1ef7e2e316f21bce15dfb414f4de5ec
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Click to collapse
Aside from the fact that I cannot read Polish, if I am not mistaken, that external antenna connector is already present in the BA. Look behind the BA (where the camera is), and you may have a rubber piece covering it, but it does have a connector for an external antenna...
BTW, I am too lazy to go to translate.google.com, what is that thing attached to the Axim?

i believe the connector on the back is only for external gsm/gprs antennae (is that the plural?). my universal has 2 external antenna connectors. one is for gsm/gprs, one is for umts. i guess those conectors are frequency dependant, so i guess the wi-fi signal could not be enhanced with that. but since something like that has never been requested before, we are just guessing here.

Chef_Tony said:
i believe the connector on the back is only for external gsm/gprs antennae (is that the plural?). my universal has 2 external antenna connectors. one is for gsm/gprs, one is for umts. i guess those conectors are frequency dependant, so i guess the wi-fi signal could not be enhanced with that. but since something like that has never been requested before, we are just guessing here.
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We don't guess Chef, we make educated remarks of doubtful validity

i think ur right chef tony..but do you know where is the internal wifi antenna inside the BA?
or what its look like?

in my signature the last link points to the htc blueangel service manual. you can look up any given hardware part there. especially towards the end of it, there is a list of spare parts with pictures.

Required: HTC One X PCB Layout

hello,
While solving the wifi issue, accidentally wifi pin(spring) from motherboard got broken and now i m not able to do soldering and my wifi is not working.
I need PCB Layout (or motherboard layout or main board layout or circuit diagram) for HTC One X so that i can trace the connection for wifi and directly connect there if possible.
I tried to search on google but cudnt find it. can someone plz provide the layout??
I dont know why its not easily available on internet. do companies hide this kind of info?
bcoz my phone is imported from another country, HTC service center refused to repair it...
plz help me..
thank you.

broken antenna is shown in the pic.
plz tell me if i can solve this issue somehow. i have attached the pic which shows the broken part.

anksh said:
hello,
While solving the wifi issue, accidentally wifi pin(spring) from motherboard got broken and now i m not able to do soldering and my wifi is not working.
I need PCB Layout (or motherboard layout or main board layout or circuit diagram) for HTC One X so that i can trace the connection for wifi and directly connect there if possible.
I tried to search on google but cudnt find it. can someone plz provide the layout??
I dont know why its not easily available on internet. do companies hide this kind of info?
bcoz my phone is imported from another country, HTC service center refused to repair it...
plz help me..
thank you.
Click to expand...
Click to collapse
Your cellphone is a Quadcore..and I took my tester and betwen the 2 pins there are 1.2 omhs so is the same point of the PBC..in the backdoor both pins touch the same plate..maybe you only need is try to separate a little the pin to be sure it touches the plate in the backdoor
I hope this help..sorry bad english

Thanks for replying ...! Finally some1 replied...
Slight confusion here..
Plz tell me what shud I do exactly? Shud I use the other pin instead of that broken pin? Bcoz they r the same..?
HOX
CID: VODAP021 (Aus voda),
HBOOT: 1.36
S-ON
ARHD 19

anksh said:
Thanks for replying ...! Finally some1 replied...
Slight confusion here..
Plz tell me what shud I do exactly? Shud I use the other pin instead of that broken pin? Bcoz they r the same..?
HOX
CID: VODAP021 (Aus voda),
HBOOT: 1.36
S-ON
ARHD 19
Click to expand...
Click to collapse
I think that is the same You should start by cleaning the plate in the backdoor and pull gently the pin .and assambly again.hope it helps

it is the same point, juste solder a wire between the remaining good point and the antena in the housing, be careful not to breack the only one point left.
if you don't want to use soldering any more, juste gently pull the pin to make it touch the antena, remember you have to do it gentely !!!!

its working now..!
amino1 said:
it is the same point, juste solder a wire between the remaining good point and the antena in the housing, be careful not to breack the only one point left.
if you don't want to use soldering any more, juste gently pull the pin to make it touch the antena, remember you have to do it gentely !!!!
Click to expand...
Click to collapse
jabo7 said:
I think that is the same You should start by cleaning the plate in the backdoor and pull gently the pin .and assambly again.hope it helps
Click to expand...
Click to collapse
thanks for helping..! i took the help of an expert for soldering purpose and its done..!! now wifi is working nicely.. :good:
but i feel that its fluctuating many times. means at the same place suddenly there will be more signal strength and suddenly it will decrease also..!! (i think thats not something to worry bcoz it happens at the places which are lil far from router.)

anksh said:
thanks for helping..! i took the help of an expert for soldering purpose and its done..!! now wifi is working nicely.. :good:
but i feel that its fluctuating many times. means at the same place suddenly there will be more signal strength and suddenly it will decrease also..!! (i think thats not something to worry bcoz it happens at the places which are lil far from router.)
Click to expand...
Click to collapse
happy to hear it worked, you did the best solution, asking help of expert in soldering :good:
don't worry about the fluctuating of wifi since you are far from the router, this is normal.

amino1 said:
happy to hear it worked, you did the best solution, asking help of expert in soldering :good:
don't worry about the fluctuating of wifi since you are far from the router, this is normal.
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Click to collapse
Should look like this

does anyone have a jtag dump of i747 or i747m?

please help.
Thanks:good:

JTAG dump??
I'm not sure what you are asking but JTAG is not a kind of "firmware" or "software" on your phone.
You may find a JTAG being visible either under the battery or near the SIM/SDCard holder, its a circuitary pin-layout hidden, one may have to dismantle the back cover, usually 6 gold pins in a cluster close together.
It is that, using a special hardware box that has a vast-array of cables with designated pins (depending on hardware manufacturer), along with specialized software which would be specifically made for that particular handset.
The micro-code instructions are emitted by the hardware box attached to the cable, clipped in position on top of the JTAG pin-outs, which sends a signal to some part of the chip to revive it, and then from there, a appropriate firmware can get flashed into place using this method.
Sent from my SAMSUNG-SGH-I747 using Tapatalk 2

niceppl said:
please help.
Thanks:good:
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Click to collapse
What? I really do not think you know what you are looking for.

Need to know the location of internal Gsm antenna

My mobiles network signal picking capability has drastically reduced after i have opened the backcase. I guess my internal gsm antenna has been damaged after i have opened the case. Please tell me the location where internal gsm module is located in our mobiles motherboard. It would be easy for me to understand if anyone could take a image and post it.
Thnks in advane

gokukaushik said:
Please tell me the location where internal gsm module is located in our mobiles motherboard. It would be easy for me to understand if anyone could take a image and post it.
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I definitely don't want to open my phone to take a photo, but here is a picture from a service manual. I marked the actual antenna assembly on it. You can also download the full set of ZL service manuals here.

kt-Froggy said:
I definitely don't want to open my phone to take a photo, but here is a picture from a service manual. I marked the actual antenna assembly on it. You can also download the full set of ZL service manuals here.
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Click to collapse
Thnks for the reply

kt-Froggy said:
I definitely don't want to open my phone to take a photo, but here is a picture from a service manual. I marked the actual antenna assembly on it. You can also download the full set of ZL service manuals here.
Click to expand...
Click to collapse
Thanks a lot for the link. Highly informational. Opened my mobile for looking for any damages to the antenna. Previously, when i had given my phone to a local service center for a microphone issue. The have modded the circuit and seems that they have damaged the antenna in the process. I have searched online for getting a spare antenna but in vain. Could you please guide me online where i could get a spare.
Model no : Xperia ZL C6502

gokukaushik said:
. Could you please guide me online where i could get a spare.
Click to expand...
Click to collapse
I am sorry, I have no idea. Can't help you with this one...

kt-Froggy said:
I am sorry, I have no idea. Can't help you with this one...
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Click to collapse
Thats k. Thnks for the reply

Just a thought... Why not take it back to the repair shop? If there are signs of them damaging the antenna, try pushing them to fix it.
Also, some things can be fairly easily repaired at home. Having no idea what the damage actually is, it's hard to say, but creative thinking and a good handywork can go a long way...