Hi,
I'm totaly confused about what I found on the main board of my HD2.
Now, Simple you think, if you look on google you find the pinout to be:
5 VCC +5 V
4 D− Data −
3 D+ Data +
2 Type A: connected to Ground
or
Type B: not connected
1 GND Black Signal Ground
Easy... Or????
My USB is broken from the PCB (looks like the coper on the pcb is not that thight to the bord. Well.. Since I did study electronocs, I should be able to fix it. I took my HD2 appart, but I found this:
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Now if you look at the connections, Pin 1 is clear, Pin 2 is connected Pin 5 is also clear. Pin 4 can be through an other layer, so that is also explanable.
BUT: Pin 3 ? Is that one not connected? Does it just use ground instead of data-?
Who can give some answers? I don't understand.
Thanks
Hi again,
Ok, I know it should be connected somewhere, but I can not find out where I can connect it. I hope someone knows where I can find a coper line or component which should be connected to pin 3.
I now heve all connected except pin3 which makes USB useless, but the charging works.
There is one more question, does anyone know where I could get a new mainboard for this phone and what the price is?
Hi,did U solve this?i have problem with microusb too...
pinouts
hope the pic help the to your problem.
be careful when soldering because the small pives will come apart if you atemot to solder with soldering iron.
best will be bga blow gun and positioning small wire near the components still be very careful otherwise you will not have what to fix.
For all, I did not solve it.. The HD2 worked fine, but flashing through USB was inposible. After a few months I droped it :-( screen was broken (Both, digitizer and LCD) and the usb broke again. so I droped it in the trash since it was not worth it anymore.... RIP HD2.... I will miss you....
kruithofm said:
For all, I did not solve it.. The HD2 worked fine, but flashing through USB was inposible. After a few months I droped it :-( screen was broken (Both, digitizer and LCD) and the usb broke again. so I droped it in the trash since it was not worth it anymore.... RIP HD2.... I will miss you....
Click to expand...
Click to collapse
Are you joking? Really dumped it?
Very big mistake!
You wasted a totally revivable/repairable hd2
Nope... still have it, but... digitizer + LCD + USB broke... And if I'm not wrong also the volume keys are teared.... So fixing it means buy LCD/digitizer/ribben kabel/mainboard... which is basicly a whole new HD2, without the casing and battery.
kruithofm said:
Nope... still have it, but... digitizer + LCD + USB broke... And if I'm not wrong also the volume keys are teared.... So fixing it means buy LCD/digitizer/ribben kabel/mainboard... which is basicly a whole new HD2, without the casing and battery.
Click to expand...
Click to collapse
I'm interested in buying it!
Think about for a fair price and PM me, if interested!
I'm not selling.. sorry...
Related
Hi.
I have done a little research about JATG pins trying to find a way to revive my dead X7500. I know it is difficult and that (possibly) a X7500 board needs to be disassembled but i wonder if it would be somehow easier to be done with X7500.
For example i saw an eten motherboard where jtag pins were easily located.
http://i591.photobucket.com/albums/ss354/son_hui/JTAGroverorsio.jpg
But i also saw the exec striped motherboard.....
Anyway.. what i want to say is that an effort to find the jtag pins would help many devices to become functional again.
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Well, there is a debug connector on the athena. More information about the debug connector can be found here: http://forum.xda-developers.com/showpost.php?p=2512981&postcount=12
You can see the connector on the right of the motherboard. Now i'm trying to find a way to connect my wiggler clone cable to the debug connector. The connector pins are too small to work with my soldering iron...is any other way to get connected?
That's the cable i'm using: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=350206464946#ebayphotohosting
and i'm planning to use pins : TDO,TDI,TMS,nTRST,TCK and the charger connected on the motherboard. Do i have to use the ground connector also...or something else?
Hi nicktgr15,
maybe you'll need a smaller solder iron
Serious, there's no other way than to solder some thin wires to the debug pads.
Maybe you'll find some bigger contacts nearby, that belong to the same connection.
and i'm planning to use pins : TDO,TDI,TMS,nTRST,TCK and the charger connected on the motherboard. Do i have to use the ground connector also...or something else?
Click to expand...
Click to collapse
Yes you'll need GND too!
As your adaptor is a buffered one, you should sort out the VCC pad on the debug connector also. This voltage is needed to power up the buffer IC on your adaptor.
P.S.: the biggest problem would be to rewrite something into Athena's flash chip. As far as i know this is a G4-DoC from MSystems and there's no JTAG solution for this part .
Anyway, good luck for your experiments!
scholbert
Hi Scholbert
Thanks for the reply. I know that this will be the hard part as i have read your adventures with universal but for the moment i just want to connect it.
I'll get a thinner tip for my soldering iron and give it a try. Unfortunately the pins around the debug port are not helping
I'll post my results here.
Regards
Nick
I have a similar problem could possibly sealed the processor and find jtag contacts in this way.
Just out of interest: I am used to JTAG flashing on satellite receivers (see my signature).
The pictured JTAG interface looks pretty much like the ones I often use. Regarding the power, mine use a battery to power them up or I can solder a DCC connection. I think that is safer than to get the power from the actual device.
The other thing is: it is not enough to just get the physical connection to the JTAG pins. One need to put the processor of the device in JTAG mode and then control the flash chip through this CPU.
Either you have a flash utility for the JTAG interface, or it will be completly useless.
I might me missing such a tool, in which case I would love to have a link to download it (don't need it, but just in case).
Cheers,
vma
I have a working TMOUS HD2 motherboard which have a "broken/ripped off" lcd connector.
I also have a non working/bricked TMOUS HD2 motherboard complete and without any physical problem.
Is there any possibility to replace this connector?
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Any help would be much appreciated.
Is the part here?
http://www.alibaba.com/showroom/parts-for-htc-hd2.html
I highly doubt it. That connector is more than likely surface mounted with little tiny pins soldered to the other side of the board, and would be amazingly difficult to remove and replace correctly by hand.
That's what I thought...
But it seems that I don't have nothing to lose...
I even have a third broken motherboard (also with a ripped lcd connector) where I can test the "removal" an "relocation" of the component. I know it's difficult, but there is too much to win and almost nothing to lose.
Any tech approach would be appreciated.
I tried to remove it with a heat gun.
It was VERY EASY and the removal was perfect!
Next I removed a good lcd connector from another phone (also without a problem) and that's where the problems began.
Soldering with a heat gun, which is not designed for precision work is like killing a bug with a bazooka... you will kill the bug but you will break something else...
End of story... ended with 2 non working motherboards and learned that I need a reworking station for this kind of work.
its easy I done them so many times without fail
MGA2009 said:
I tried to remove it with a heat gun.
It was VERY EASY and the removal was perfect!
Next I removed a good lcd connector from another phone (also without a problem) and that's where the problems began.
Soldering with a heat gun, which is not designed for precision work is like killing a bug with a bazooka... you will kill the bug but you will break something else...
End of story... ended with 2 non working motherboards and learned that I need a reworking station for this kind of work.
Click to expand...
Click to collapse
its easy and done it many times sorry you couldn't done it
Tips on how to replace the lcd connector on logic board
dan18 said:
its easy and done it many times sorry you couldn't done it
Click to expand...
Click to collapse
Sorry but can you assist some of us with the same problem in few short tips before I destroy my motherboard too
I might be wrong but is it just the clip that is broken? Do the contacts still connect? It might be possible to glue a thin strip of metal to the plastic ends of the motherboard's connector to hold the ribbon cable connector in place. Might work
Hi guys,
the last five days i was having problems with my usb port and it really scared me because this is how i lost my last phone.It first started to charge randomly,sometimes charged sometimes not,until it didnt charged at all,but thats not the case with my x8(i hope so ).
If you having promblems with charging too, keep reading this thread and i hope you will get an answer.
Usb looseness can be caused due to several reasons,what im gonna tell doesnt guarantee that it will solve your problem.
1)Change your charger
-If the problem is in the usb cable that will solve your problem for sure!
if any of your friends have the same phone borrow his charger and try to charge your phone.
I dont really suggest to buy a new one just like that,maybe read further and if nothing happen then go for a new charger.
2)Clean the usb port
-Its really common for the usb port to fill with dust and lint and as a result usb cable doesnt fit in the port well.
Check this thread out to see what you have to clean
telmosousa said:
A while ago I noticed that my micro USB cable does not fit well on my U8800 and when I picked up my phone the cable the cable always fall out without doing any force. After reading various sites, to decide what would be the best way and after I did it I'm now leaving here how to solve this problem. In my case it was dust and lint that accumulated because of taking the phone in pocket, etc..
Tutorial
You should use a toothpick, previously buffed with a fine sandpaper like the image below. You can use other objects, but with the toothpick you can do it without turning off the phone because it isn't a electrical conductor and you can also sharpen the tip very easily.
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You should clean the area paint in blue below:
After this you should give special attention to areas in microusb port marked in red below which is where bolts fits and attach the cable to the port. You should try to clean as much as possible the dust that has entrenched there.
In my case after 5 minutes of hard work this was the result:
I used the lamp on my bedside table for a better look inside the door. Those black things are dust that came out of there now do not have any slack in the port works at 100% and I can move the phone without any problem.
Click to expand...
Click to collapse
3)move the thing* inside the usb port
If you didnt understand what im talking about i hope the pic will help you
-Try to barely move it with a pin or with you finger or with something else, if the problem resist try to move it a little bit more,be carefull!!!Don't push it too hard it can break!!!
For me it works when i push it from the front side of the phone to the back,but if that doesnt help try the opposite.
This is how i solved my problem,after noticing that my usb cable was unstable when it was plugged in, i tried to move it and it worked,now it charging normally and if i move it the opposite direction it doesnt charge
*****Warning*****That is for when you have problem with it, if your port is ok dont mess with it!!!!!!!
And dont mess with this too much,you can break it!!!!!!
I'm not responsible for any damage you possible do to your phone
If you have any suggetion for the thread or for my english( ) please feel free to tell me by posting your comment or by pm
*does anyone know the exact naming?i cant find the proper word...
Thanks! Nice thread! I have this problema too..
Sent from my E15i using xda premium
Thanks for the guide! It could be useful
Thx Im going to try!!!
im glad you liked it
Good work bro.
Sent from my E15i using Tapatalk 2
I was attempting to solder in a usb flash drive onto the board for some extra internal storage, similar to what they are doing in this thread => http://forum.xda-developers.com/showthread.php?t=1866988
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While soldering I accidently broke the piece circled in orange int he picture. I think it is a resistor? Can anyone confirm that and possible tell me how many ohms it is? The piece fell on the floor and is in my carpet somewhere. I would like to get a new piece to solder back in. Since the piece is missing my nexus 7 works fine except it can't go into OTG mode. If I connect a flash drive to the micro usb port with an OTG cable nothing happens and previously it would mount the USB with stickmount.
grnqrtr said:
I was attempting to solder in a usb flash drive onto the board for some extra internal storage, similar to what they are doing in this thread => http://forum.xda-developers.com/showthread.php?t=1866988
While soldering I accidently broke the piece circled in orange int he picture. I think it is a resistor? Can anyone confirm that and possible tell me how many ohms it is? The piece fell on the floor and is in my carpet somewhere. I would like to get a new piece to solder back in. Since the piece is missing my nexus 7 works fine except it can't go into OTG mode. If I connect a flash drive to the micro usb port with an OTG cable nothing happens and previously it would mount the USB with stickmount.
Click to expand...
Click to collapse
That is a resistor. When I get a chance I'll get the resistance for you, I'm in the process of moving my office in my house so I don't know exactly where my Multimeter is at the moment.
Thank you! That would be much appreciated!
Still haven't heard anything. Can anyone check the resistance for me?
grnqrtr said:
Still haven't heard anything. Can anyone check the resistance for me?
Click to expand...
Click to collapse
Have you had a look at Nexus 7 schematics?
I found this, http://forum.xda-developers.com/showthread.php?p=31922480#post31922480 , but it's way too complex for me. I have no idea how to find that one little resistor in the schematic.
grnqrtr said:
I found this, http://forum.xda-developers.com/showthread.php?p=31922480#post31922480 , but it's way too complex for me. I have no idea how to find that one little resistor in the schematic.
Click to expand...
Click to collapse
My guess, please check the schematic on sheet 14 of 60 or page 14, look for r83. Value of R83 is 100k ohm.
please correct if I was wrong.
KVLV said:
My guess, please check the schematic on sheet 14 of 60 or page 14, look for r83. Value of R83 is 100k ohm.
please correct if I was wrong.
Click to expand...
Click to collapse
That definitely looks like a good guess. I might try that. Can anyone else confirm KVLV's guess?
Hi,
My Nexus 7 Gen 2 usb stopped charging (it was on/off for a while but now fully stopped).
I ordered a new USB component from eBay so I was desoldering the old one this morning but unfortunatley the 5 pins at the back ripped a few of the pads from the board off.
I was wondering before I order a new USB PCB for £40 is it possible to re trace the 5 pins and wire them to somewhere different on the board??
Looking at this picture this is what I thought I could do:
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Is this possible and if so the best way to fix this?
Thanks
Rowan88 said:
Hi,
My Nexus 7 Gen 2 usb stopped charging (it was on/off for a while but now fully stopped).
I ordered a new USB component from eBay so I was desoldering the old one this morning but unfortunatley the 5 pins at the back ripped a few of the pads from the board off.
I was wondering before I order a new USB PCB for £40 is it possible to re trace the 5 pins and wire them to somewhere different on the board??
Looking at this picture this is what I thought I could do:
Is this possible and if so the best way to fix this?
Thanks
Click to expand...
Click to collapse
You could try soldering to those solder pads right before the resistors/caps in the path. If you bypass those, and solder directly to the exposed pads you identified, you may have issues, i.e. those resistors/caps are probably there for a reason . That's what I would try anyways.
did you ever end up soldering to these pads? cause any issues?
neonshaun said:
did you ever end up soldering to these pads? cause any issues?
Click to expand...
Click to collapse
nevermind, didnt work of course. Ended up soldering to the pads just before those caps, just needed to not be lazy about it.