3gs backlight alternative path - GSM-Forum

tinner105 · 07-08-2012, 16:27

3gs backlight alternative path
I need a different path for the 3gs backlight.

Both test points on the backside are completly gone along with the components. no pads left at all.
So i ran a wire from the 109b ic to the lcd connector.
and now i need a alternative path for the other leg.

Uploaded with ImageShack.us

I need an alternative path for the green leg, keep in mind the pads near the test point are completly gone.

Thanks for the help

Tinner

**Wites OM Tesla** · 07-08-2012, 20:21

Oh man very bad this way going under PMIC no other way,only solution is to scratch in board and find coper dot with track it is time to learn to do that not hard,only one person till now learned to make operations in board that i know is Limespirit from Malta.
Show in picture the damage.

tinner105 · 07-08-2012, 21:57

Ok one quick question.
how does it go...

pmic.... test point..... components....lcd connector

I found the trace too the small components but i need to find the trace that goes to the testpoint correct?

Thanks
Tinner
ps i scratched all around it nice shinny copper and a hole where the test point was.
do i need to get under the layer of copper?

**Wites OM Tesla** · 07-09-2012, 12:01

Quote:

Originally Posted by tinner105

Ok one quick question.
how does it go...

pmic.... test point..... components....lcd connector

I found the trace too the small components but i need to find the trace that goes to the testpoint correct?

Thanks
Tinner
ps i scratched all around it nice shinny copper and a hole where the test point was.
do i need to get under the layer of copper?

Yes you are right pmic>test point>filter>pin1,filter applies only in new layout.
Do like this put some liquid flux where you scratch make a zoomed in clear photo and i will see if possible to jump.

tinner105 · 07-10-2012, 08:25

WOOOOOOOOOOOO HOOOOOOOOOOOOOOOO

I did it

Wow let me know if someone figured this one out before.
I had both backlight test pionts totally gone along with the components.
I ran a wire from the 109b ic to to the lcd pin in the red line.
but i had no idea what to do for the green line.
i scraped around but what i found was directly below where the tp89 was ...
I scraped away and found copper so i took a shot and ran a wire from it to the lcd pin that the green line went to and it worked.
So I'm charging it up right now wnd I'm going to check it all out to see if everything works. if it does.
next time i will just scrape the TP 89 untill i find copper and use that.

Yea Boye

I would have taken a picture but i but it back it and it works so in it stays.

Tinner

**Wites OM Tesla** · 07-10-2012, 09:56

Quote:

Originally Posted by tinner105

WOOOOOOOOOOOO HOOOOOOOOOOOOOOOO

I did it

Wow let me know if someone figured this one out before.
I had both backlight test pionts totally gone along with the components.
I ran a wire from the 109b ic to to the lcd pin in the red line.
but i had no idea what to do for the green line.
i scraped around but what i found was directly below where the tp89 was ...
I scraped away and found copper so i took a shot and ran a wire from it to the lcd pin that the green line went to and it worked.
So I'm charging it up right now wnd I'm going to check it all out to see if everything works. if it does.
next time i will just scrape the TP 89 untill i find copper and use that.

Yea Boye

I would have taken a picture but i but it back it and it works so in it stays.

Tinner

Please chk if you can adjust contrast if yes then you found it if no then you short green to gnd.

tinner105 · 07-10-2012, 17:29

AHHHHHHHHHHHHHHH CRAPPPPPPPPPPPPPPPPP

Yup I was checking everything out last night and found......
no brightness adjustment.
So any hazard in leaving it as is?

This board had the three components around the test points
one on the red line and two on the green
I scraped all around the tp89 and it was copper everywhere except the path to the first of the two components on that one.
So I'm kinda stumped as to where was the path to the TP.
other than scraping do you know what would take the blue off of the board and seave the traces?
I have a scrap board id like to experiement with and trey and find it.
Eventually.

Thanks for the help

PS
Im going to try and upload a picture of a 4s wifi problem to another post i have. I found the missing part. I have the schematics ( your version) but as you know it's above my skill level.

tks

tinner

**Wites OM Tesla** · 07-10-2012, 21:45

Here Friend i scratch for you scratch first layer in second layer you will see black tracks like in my picture scratch that tracks a little and make green jumper that is all,with red i mark where was components also you can see where are coper dots not under TP.

tinner105 · 07-11-2012, 03:18

Wow I guess you dug way deeper that i did.
Thanks alot, that soultion is perfect.
I'm going to practice on a board i just got thats scrap.
I need to learn how to pull the pmic chip with out tearing contacts off of the chip also.

Thanks Wites for the help

07-08-2012, 16:27	#1 (permalink)
tinner105 Freak Poster Join Date: Jul 2010 Location: California Posts: 247 Member: 1352483 Status: Offline Thanks: 55 Thanked 25 Times in 22 Posts	3gs backlight alternative path 3gs backlight alternative path I need a different path for the 3gs backlight. Both test points on the backside are completly gone along with the components. no pads left at all. So i ran a wire from the 109b ic to the lcd connector. and now i need a alternative path for the other leg. Uploaded with ImageShack.us I need an alternative path for the green leg, keep in mind the pads near the test point are completly gone. Thanks for the help Tinner

07-08-2012, 20:21	#2 (permalink)
Wites OM Tesla Moderator Join Date: Apr 2009 Location: Moldova,Chisinau. Age: 27 Posts: 3,432 Member: 1017374 Status: Offline Thanks: 68 Thanked 2,439 Times in 972 Posts	It is time to learn make repair in board. Oh man very bad this way going under PMIC no other way,only solution is to scratch in board and find coper dot with track it is time to learn to do that not hard,only one person till now learned to make operations in board that i know is Limespirit from Malta. Show in picture the damage.

07-10-2012, 21:45	#8 (permalink)
Wites OM Tesla Moderator Join Date: Apr 2009 Location: Moldova,Chisinau. Age: 27 Posts: 3,432 Member: 1017374 Status: Offline Thanks: 68 Thanked 2,439 Times in 972 Posts	iPhone 3GS Fix Corroded Track for Light That Go To PMIC. Here Friend i scratch for you scratch first layer in second layer you will see black tracks like in my picture scratch that tracks a little and make green jumper that is all,with red i mark where was components also you can see where are coper dots not under TP.

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07-08-2012, 21:57	#3 (permalink)
tinner105 Freak Poster Join Date: Jul 2010 Location: California Posts: 247 Member: 1352483 Status: Offline Thanks: 55 Thanked 25 Times in 22 Posts	Ok one quick question. how does it go... pmic.... test point..... components....lcd connector I found the trace too the small components but i need to find the trace that goes to the testpoint correct? Thanks Tinner ps i scratched all around it nice shinny copper and a hole where the test point was. do i need to get under the layer of copper?

07-10-2012, 08:25	#5 (permalink)
tinner105 Freak Poster Join Date: Jul 2010 Location: California Posts: 247 Member: 1352483 Status: Offline Thanks: 55 Thanked 25 Times in 22 Posts	WOOOOOOOOOOOO HOOOOOOOOOOOOOOOO I did it Wow let me know if someone figured this one out before. I had both backlight test pionts totally gone along with the components. I ran a wire from the 109b ic to to the lcd pin in the red line. but i had no idea what to do for the green line. i scraped around but what i found was directly below where the tp89 was ... I scraped away and found copper so i took a shot and ran a wire from it to the lcd pin that the green line went to and it worked. So I'm charging it up right now wnd I'm going to check it all out to see if everything works. if it does. next time i will just scrape the TP 89 untill i find copper and use that. Yea Boye I would have taken a picture but i but it back it and it works so in it stays. Tinner

07-10-2012, 17:29	#7 (permalink)
tinner105 Freak Poster Join Date: Jul 2010 Location: California Posts: 247 Member: 1352483 Status: Offline Thanks: 55 Thanked 25 Times in 22 Posts	AHHHHHHHHHHHHHHH CRAPPPPPPPPPPPPPPPPP Yup I was checking everything out last night and found...... no brightness adjustment. So any hazard in leaving it as is? This board had the three components around the test points one on the red line and two on the green I scraped all around the tp89 and it was copper everywhere except the path to the first of the two components on that one. So I'm kinda stumped as to where was the path to the TP. other than scraping do you know what would take the blue off of the board and seave the traces? I have a scrap board id like to experiement with and trey and find it. Eventually. Thanks for the help PS Im going to try and upload a picture of a 4s wifi problem to another post i have. I found the missing part. I have the schematics ( your version) but as you know it's above my skill level. tks tinner

07-11-2012, 03:18	#9 (permalink)
tinner105 Freak Poster Join Date: Jul 2010 Location: California Posts: 247 Member: 1352483 Status: Offline Thanks: 55 Thanked 25 Times in 22 Posts	Wow I guess you dug way deeper that i did. Thanks alot, that soultion is perfect. I'm going to practice on a board i just got thats scrap. I need to learn how to pull the pmic chip with out tearing contacts off of the chip also. Thanks Wites for the help