TobíasTv

13.721

hace 5 años

Do one thing in the connector of the LEDs measured the trends when he walks and makes a little board, then when he doesn't walk and you compare on the board, and you share the results I will know how to say what is not going on;)

JAQC

65

hace 5 años

thank you dear ... it is true the screen is quite large but I will again verify what you say the contacts between the unions of the led strips ..

TobíasTv

13.721

hace 5 años

If you grab it just when it does not go, you can go measuring on the strips and you will see that the tension does not pass somewhere

TobíasTv

13.721

hace 5 años

watch this video, the technician uses an oscilloscope, I use the tester, the interesting thing is how it analyzes the backlight source circuit with summarized schematics, it is not your model but it is the same technology
https://www.youtube.com/watch?v=XWhp-2l4auQ&t=63s
my luck is like;)

JAQC

65

hace 5 años

Well, that was exactly what I did to measure all the diodes and the funny thing is that when I did the LED test without the panel, they all turned me on and the LED circuit all turned on normal and did not turn off, but since I put the panel, I mean the screen came back The problem is why I fear that some contact is not going well ...

TobíasTv

13.721

hace 5 años

try disconnecting the t-con, it's as if it didn't have a display to discard ...
When I turn on I put the sunglasses on and I measure the tension in the entire bars, it has to measure the same all if one is different I go led by LED, the idea is that all the LEDs have the same voltage, the one that is different outside
To test them I use a LED tester, I can measure a strip from a led and even some complete backlight, it is very practical if you grab it with crocodiles to the tips of the tension tester
I use it with 110volts and 10k 4watts
notice here

TobíasTv

13.721

hace 5 años

https://yoreparo.com/tv/televisores/lcd/preguntas/1561760/probador-de-tiras-led?p=5833971#5833971

JAQC

65

hace 5 años

good input on the tester, if I tried the LEDs disconnecting the tecom only source and the video control and they turned me on when I had them open without the screen they turned me on normally, after I joined with the screen all connected the problem started already assembled and the tecom disconnected they didn't turn on normal just for a little while ... I did the led x led test applying 6v and they all turn on.

TobíasTv

13.721

hace 5 años

When it goes out, check what happens with the voltage on led + did you try to lower the backlight?

JAQC

65

hace 5 años

I have not done or know how to lower the backlight ... the voltage on the led + terminals told you this tv has 4 wires + - + - in the first + - the voltage at the time of turning on the screen rises 0.1va 10v and in the second + - the voltage is 85v to 122v

TobíasTv

13.721

hace 5 años

the measurement is mass, from the two leds + and the two leds- when he walks and when he doesn't walk, he makes a little board