Samsung LE40A558P3FXXU Colored lines

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

Pictures are too low res for me to zoom in to see anything in details.

I have uploaded the unedited versions of the pictures are these any better or do I need to take more?

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

I have checked the 12VIN on the T-Con and am getting 12.4v is there any other voltage checks I need to carry out? does this mean the problem is forward of the T-con? thanks

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

anybody know what I should be looking at next? thanks

[Davi.p]

Re: Samsung LE40A558P3FXXU Colored lines

I would like help you but theese days i'm too busy and too hot in the room with the PC turned on..

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

I would like help you but theese days i'm too busy and too hot in the room with the PC turned on..

Hi, I'm not sure of the purpose of your response? did you have any advice/help to give? I would really like to get this sorted out and don't want to just throw boards at it someone please let me know what I should be looking at/doing next, I've checked the T-con input and have 12.4V on the 12VIN test point

Thanks for all your help and understanding this level of tech testing is not my strong point though I do enjoy the feeling of getting something going again.

[Davi.p]

Re: Samsung LE40A558P3FXXU Colored lines

It's very simple, since i asked you photos but now it's not the right moment, if you can wait also better wheater , september or so..

[SMDFlea]

Re: Samsung LE40A558P3FXXU Colored lines

In your first picture at post #20 it looks like there`s some sort of liquid residue,it could be flux, and i see a resistor thats not straight.Have you owned the TV from new or is it used/refurbished,have you had any previous repairs done to it.

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

In your first picture at post #20 it looks like there`s some sort of liquid residue,it could be flux, and i see a resistor thats not straight.Have you owned the TV from new or is it used/refurbished,have you had any previous repairs done to it.

Thanks for your response SMDFlea it's a used unit I got for my daughter a while ago that only recently started showing this issue no one has looked at it before me that I'm aware of which component are you referring to please?

I see it now R867, looking at the board several of these resistors are not straight R867,R850,R851,R278 there's quite a number of them so I've checked the 12VIN and got 12.4V does that mean the issue lies T-con forward then? component F1 is that going to be a fuse?

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

It's very simple, since i asked you photos but now it's not the right moment, if you can wait also better wheater , september or so..

I think I understand what you're saying, it's to hot to spend time at the PC to study the pictures to look for the fault, is there anything I could do to help with the looking?

[Davi.p]

Re: Samsung LE40A558P3FXXU Colored lines

i found a good photo of the board, test in volt points VGH, VGL, V1D8, V2D5, V3D3, AVDD,; touch as15-f chip to feel too much heat..

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

Great what voltages should I be looking for?

[Davi.p]

Re: Samsung LE40A558P3FXXU Colored lines

you have only to write them here obviously, i tell you the rest..

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

i found a good photo of the board, test in volt points VGH, VGL, V1D8, V2D5, V3D3, AVDD,; touch as15-f chip to feel too much heat..

I can't see the test points you are asking me to test, I can see lots of points VGMA1 through to VGMA22

I can see loads starting OX and EX

an LVDS_IN and LVDS_OUT

REF1 through to REF21

are we looking at the same board you do want me testing on the T_con?

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

found them all these are the results I got with the screen turned on

V1D8 1.8v
AVDD 15.66v
VGL 5.9v
VGH 21.5v
V3D3 3.3v
V2D5 2.48v

which chip is the as15-f please?

[Davi.p]

Re: Samsung LE40A558P3FXXU Colored lines

VGL must be negative, as15 is written on chip

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

VGL must be negative, as15 is written on chip

I'm not sure I understand do I need to retest the VGL, were the rest of the results okay, I will have another close look at the board for the AS15 chip

[budm]

Re: Samsung LE40A558P3FXXU Colored lines

Your meter should show minus sign in front of the number being display on the meter for the VGL reading to indicating that the Voltage is negative polarity.

[vinceroger69]

Re: Samsung LE40A558P3FXXU Colored lines

I'm not sure I understand do I need to retest the VGL, were the rest of the results okay, I will have another close look at the board for the AS15 chip

the as15 ic will look like this in this video
https://www.youtube.com/watch?v=jf75hmjd6X8

[Davi.p]

Re: Samsung LE40A558P3FXXU Colored lines

It's obvious that if you have silicone bumpers you have to remove it, search the web for images with the TCON code, you'll find the picture with as-15 visible, check images from https://spares2repair.co.uk

[24mech]

Re: Samsung LE40A558P3FXXU Colored lines

I rechecked the voltage at VGL - 5.9

I have removed the silicone bumper from as-15 after 5 mins of tv on its cold how long do I need to leave it on before testing?