3G Backlight Circuit Explained at last

[sgh-i200]

Originally Posted by sgh-i200

Do you mean the coil on 3G in following Image isn't the problem?

http://forum.gsmhosting.com/vbb/atta...1&d=1287522699

Again, because first time I not managed to get this pic in...

Edit: The answer I searched for:

1. There should not be continuity across the yellow rectangle that feeds pin 2 of the connector. This part is a capacitor.
2. Same with the smaller yellow one below the coil - this is also a capacitor - no continuity across it.
3. There should be continuity from the right side to the coil in photo as shown to the coil.
4. The coil should show as having continuity between the left and right side.
5. The left side of the small capacitor should be continuity to ground.

I will test that!

[AutoDelete]

so...possible replace this coil with rework station?

[sgh-i200]

Originally Posted by AutoDelete

so...possible replace this coil with rework station?

4. The coil should show as having continuity between the left and right side.

I checked that and there is continuity. Seems there is another part that isn't working...

[dasilvafelix]

Could I ask a question I have no problem with 3G where I can not see the image I see only the screen is turned totally white. I have verified that it works when trying to unlock tooch and felt noise.
I would like to know if this solution might solve a problem or is the connector number. 1? Meets I've been told the connector is taken water issues and is a dark can the first and second pins.
Do you change the connector to work?

Thanks in advance .......

[jseraphim]

Try holding home and power button together for 10 seconds, this may reset the screen.

[dasilvafelix]

Originally Posted by jseraphim

Try holding home and power button together for 10 seconds, this may reset the screen.

Yes, I did a reset and nothing happens, I changed the display con un one running, but I think the problem is the connector nr. 1 which is oxidized

[CTMC]

3gs iphone only lcd light no display plz help me

[hoze!!!]

Originally Posted by sgh-i200

Again, because first time I not managed to get this pic in...

Edit: The answer I searched for:


I will test that!

This helps to me. I use coil from Nokia 6230 and work great. Changed coil in red square.
Thx

[semon80]

Thanks for information. But i have a question.
What nominal of coil for 3G? 2.2mH (like in scheme)? Or i can use 6r8 or 3r3 or 4r7?
I have"t any phones for remove some coils. I want to by coil in shop.
Thanks.

[noobfix]

Originally Posted by jseraphim

Figured it out at last, just attach image with the icon, not manage attachments.

you can get the 3G backlight Coil and IC from here