iphone 3G MotherBoard Diagram

[tariq_h]

Good post ,,,,,,,,,,,,,,,,,,,,,,

[artusb]

what dou you mean ????
Board is broken ?????

[nizarg]

Originally Posted by artusb

what dou you mean ????
Board is broken ?????

I missed that part on board

[artusb]

iphone without this part must workt propertly !!!!!!!!!

[Jilani001]

I have iphone 3GS but simcard not detected i need sim way .........how can i solve thi problem

[nizarg]

Originally Posted by artusb

iphone without this part must workt propertly !!!!!!!!!

the phone is work with no service

[b4ff0]

Hi all...i have an iphone 3Gs with no signal problem.
I check the antenna circuit with tester and i noticed that these points are connected to ground, i think that it shouldnt' be like these. So i try to rehot the antenna switch but i havn't any result.

I would ask to someone who has more experience if i have to replace antenna switch or if the problem colud be solved with another solution.

thanks and sorry for my bad english

[artusb]

signal on antena socket almost ground, you can see coil near antena socket

GND----coil---antena---coil--------signal(switch)

If no signal gsm replance switch or PA

[b4ff0]

Originally Posted by artusb

signal on antena socket almost ground, you can see coil near antena socket

GND----coil---antena---coil--------signal(switch)

If no signal gsm replance switch or PA

many thanks...in your opinion there's a method to understand if these problem is caused by switch or power amplify?

who lend me these phone say to me that the gsm signal decrease slowly in the last 2-3 month until it get No services.

[artusb]

Lottery - smoetimes

i will change PA - but very carefully becouse its fragile IC

[irwiner]

Originally Posted by guileukow

Hi,
I bought a logic board from ebay which had the problem of white / fade / pale screen due to watter dammage. This forum helped me to find the clue, especially rogerboogie who place me on the right way and to artusb who aked the right question . Thanks guys

To artusb ->
No you're wrong, this area is really connected to the lcd screen. I guess this is the power supply/regulator for the LCD pixel bias or something like that.

To explain lets see the problem I had:



I had the picture (apple logo and so on) but the image was bright, the colors was Pale and Fade. I searched for a while on the logic board before to find this website.
....

Hi everyone. I have the exact same problem, but when I took off the metal part to see how was looking what is under, everything looks perfectly fine. Is there a way to check that those parts are good or not (testing the resistance maybe). Any other thing that I could check ?

Many thanks

[selfone69]

Originally Posted by uchihakira

Does anyone know what is this?

fuse!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
fuse!!!!!!!!!!!!!!!!!

[irwiner]

My "fuse" looks in great shape, still does that mean that replacing it will solve my probleme for sure ?

My digitizer is not working either is there a link between thos two problems ?
Last question, where can I find a replacing part and what is its reference ?

Many Thanks

[gerardpuducul]

Hi all, my iphone3G don't charge anymore and it is not recognize by itunes. Only black screen

It 's history : following Wifi problem i have reflow the wifi chip and eveything work good. Until the full discharge of the battery. My phone go off and since never wake up again. I have check the USB controler voltage and have 5V on all point marked.

Somebody can help me please?

[ozy]

Originally Posted by nizarg

[IMG]http://im1.******.com/2010-10/12872383551.jpg[/IMG]board is broken ... how i can fix it ?

got a 3g here with this problem, the pcb is cracked from outter edge screw hole and phone works but has no signal, although the pcb is multi layer if this corner was removed to stop layers shorting would it then be possible to link the antenna switch to the antenna and restore service.

anybody any thoughts on this or tried it befor.