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LCD TVs - LED
How to turn on TV Source Lg 43LF5410
13.721
hace 5 años
hace 5 años
Hi skatapla, putting the PWR_ON at high level starts the source and putting DVR_ON at a high level starts the backlight with a resistance from 5 volts but you don't have to, you would have to do it with an external source ... if you have voltage on the receiver of the remote to know if the standbi voltage that is generated in the main is going on ...
what you have to do is determine if what does not work is to the main or the source I will give you a tip to determine if what does not work is the main or the source
When you connect the TV the source delivers a standby voltage to power the main,
when you give the power the main returns the power on level to the source and it delivers the main tensions
Three cases
1 - That the source delivers the standby and the main does not return the power on - main malo
2 - That the source does not deliver tension - bad source or short main
3 - That the main return the power on and the source does not deliver the tensions - bad source
What is your case?
I leave you my Like of Luck for solutions and I wait for yours;)
If you ask a question in the forum, always answer it, the colleagues who answer you spend your time and knowledge with the will to help you, if you are grateful, choose the best answer and give a Like to those who participated.
Thank you for collaborating in the forum and Success with your repair
47
hace 5 años
Hello great your explanation I only have some doubts, when you say that I feed with 5v from an external source, would it be to turn on the source outside the TV? when you say I don't have that 5v, why is that? shouldn't they be in P-DIN where now there is only 2.1v? If so, I have an adjustable source, you could explain to me how and in what way I inject the 5v to turn on the source. Doing this I understand that the source would ignite and allow me to take the tensions and confirm that they are well, is this so?
13.721
hace 5 años
I miss you the most important thing, like me
and if with an external source, mass of the external source to secondary mass, positive with 3.3 to PWR_ON and DVR-ON, the 12 volts would have to be stabilized and the backlight turned on
EYE THAT IS CLEAR, I do not do this test nor do I ever indicate it, you can spoil the source, but if you want to do it it is your source;)
47
hace 5 años
Good morning, I measured the voltage on the receiver of the remote control and found the following voltages: https://ibb.co/dbNpbm another thing that I noticed is that the standby LED flashes fast but you can hardly see it since the light is dim only For a few seconds and then it goes out. any ideas? thanks!
13.721
hace 5 años
the remote receivers are powered by 3.3 volts or 5 volts, it is the same voltage that feeds the eeprom and the microprocessor, there is your problem, you should consult the diagram but find nothing
If you are from Argentina here you can compose a
https://electronica.mercadolibre.com.ar/componentes-electronicos/placa-main-lg-43lf5410
13.721
hace 5 años
32lf565b is # eax66167204 (1.0) if this is the main code there is no info anywhere, anyway answer your question about how to test the source, and even more ...
I can not help you anymore so you can accept the answer, after that, any questions you can post and I will be notified, successful
13.721
hace 5 años
what matters is the output, you have 8.8 volts in the photo you uploaded, it is the main supply voltage in standby, it is conformed with "D201: 13.2V (8.80V Stby)"
hot and cold refers to the masses to measure with the tester, in hot medis with the black tip of the tester in the negative of the primary filter of the primary and in cold with the mass of the secondary, eye with the measurements
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