Samsung UE40D6750 LCD TV - Horizontal Lines & Vertical Stripes, Brightness Issues, BN94-05105F

Samsung UE40D6750
main: BN94-05105F
power supply: bn4400427
logic: BN41-01743A
matrix: LTA400HV01-J made in Slovakia 2011.10.01
The image on the TV is, the content can be easily recognized but horizontal lines can be seen as every 3rd line had a shade, for example violet, another third every other shade etc. There are also vertical irregular wide stripes on the image - as if the other brightness was in this place. And the whole picture is too bright, although at times it has the correct brightness - but it does not change by leaps and bounds.
It's hard to describe this effect and I can not take pictures right now.
The same stripes and strips are on the OSD as well as in the picture.
On voltage logic they look correct, nothing overheats.
I suspect the matrix itself, can anyone give credence to my suspicions?
Greetings.

Primo, we're talking about T-con

Quote:

T-con SH120PMB4SV0.3 (pcb: BN41-01743A) 40 "Samsung

It would be nice to measure something, for this T-con were given in this forum values and tensions in the points described
* clean it thoroughly on the T-con going to the matrix, as you have the symptom below

I forgot to clean the tape from the logic to the matrix - I cleaned it but it did not help.
The voltages I have measured - are in line with these https://www.elektroda.pl/rtvforum/topic3083138.html#14966367
However, the matrix?

I do not suspect the quality of the matrix, just what wet it was.

I'm starting to make myself think about it. Although the client claimed that it certainly was not. Well, I will warn him that I have to "enter" the matrix and see. In this TV the matrix frame is surrounded with black plastic tape which is very hard to peel off. We'll see.

Horizontal cleaning strips? With T-CON on top? I doubt it.
You want to buy T-CON. You can have a 5% chance.

Similar to some of the pictures? Well, no one has officially repaired it yet.
But check before you start the frame, how it behaves with only one tape (once the right one, once the left one, do not remove it and do not put it on when it is turned on, because you will probably damage the I7959).

Once you have started, give the name of the tabs and plates.

This is an obvious damage to the matrix itself. The matrix does not have side drivers and it is not possible to combine the damaged voltages that run between the green matrix bar and the glass itself.

Marek, what you see in my pictures is clearly a matrix.
It is not entirely clear what exactly @janomo has, where it will not take good photos.

By disconnecting the logic strips to the matrix, I get the picture on the right half in both cases, still with interference.
I will try to take pictures.
Here they are.
I wonder one more thing, how to make matrix and logic tests without main. I connected the power supply to the logic, the TV turned on and the picture was black. I used to get a color test on a TV with this connection.
And one more thing, why do I still have the same image on half of the matrix disconnecting the individual tapes from logic to the matrix with the same distortions?

Quote:

And one more thing, why do I still have the same image on half of the matrix detaching the individual tapes from logic to the matrix?

Because this is a negative voltage problem Voff, and the visual effect appears only when the problem is on both sides of the controllers on the connection with the glass. Analogously to the matrixes with "ears".

Ears or COG (chip on glass) are responsible for controlling the lines and here the problem is only with the columns.

onedolars wrote:

Because this is a negative voltage problem Voff

On logic this voltage is correct.

satgal wrote:

here in this case is a problem only with columns

Not only with the speakers, in the pictures it can be hardly seen but probably every third line has the wrong color, although it changes with the change of the image.
I do not know if I express myself clearly, I mean that since I disconnect one of the 2 tapes for the matrix, why do I still have a disturbed image in half of the picture, and not every second line is black or white - generally unstrained?

Rather, an indication of damage to the matrix.

Try to "blow on" this BGA ALMCD (LVDS controller AMLCD LPF10A1), see the effect. Link

There is no point described on this T-con. for an RGB or similar test like in Samsung


___________
VIN_12V 12.3V
VCC33 3.24V
VCC12 1.2V
VCC18 (t_con) = VDD (ears) = 1.76V
AVDD (t_con) 17.15V
VDDMHL = VDDMHL1 = VDDMHL2 = 8.6V
VONE 31.8V
VOFFE -12.2V "with a downside
VR 9.9V
VSS -7.4V

On the COG (left and right side) the voltage should be similar
VDD 1.75V
VCOMS 6.9V
HAVDD 8.58V
AVDD 17.14
SVCOM 7.69

Hello.
On 80%, the poems on the left are working, looking at these pictures.
Is there really no difference by disconnecting the individual tapes going to the matrix.
With this damage, disconnecting the tape from the left side, the image on the other half should be good. The question is, do the disturbances change over time?
On the left side of the picture, just as he would like to get haze, which would indicate the lack of any of the signals on these lines.

Added after 8 [minutes]:

90% damaged glass matrix.

There was a forum of its time (with pictures) and Link_ SH120PMB4SV0.3 - no image

Quote:

Ears or COG (chip on glass) are responsible for controlling the lines and here the problem is only with the columns.

A rhetorical question for satgal. Have you repaired at least one matrix ??

Quote:

On logic this voltage is correct.

So how else will the matrix be correct and it will be then you have the answer.
Of course you can also listen to the stories of strange content.

Added after 1 [hour] 25 [minutes]:

The answer to the second question, because only now I have read this strange question ... oh janomo, janomo ....

Quote:

I do not know if I express myself clearly, I mean that since I disconnect one of the 2 tapes for the matrix, why do I still have a disturbed image in half of the picture, and not every second line is black or white - generally unstrained?

The answer is very simple. Because both sides steer the same with lines at the same time. And why is it and why? This is your homework to do

I kept deceiving myself that maybe it was not a matrix because the TV was so "cool" and the client would want it not to be a matrix. But what - a waste of time - a matrix.