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TVs

Lower voltage led backlight tv RCA L40T20SMART.

ledesma javier

hace 5 años

Good morning forum. I need to lower the backligh LEDs of this tv. But I don't get the diagram to know what resistance I should modify to lower the voltage, Already repaired led strips but after a few months returns with the same problem. Thank you in advance for your help. Regards

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rafael marcelo stag

317

hace 5 años

The voltage should be lowered from the OSD menu or advanced mode ... You do not need to change resistance, the reason is that you work in thinking mode so call it the system. Where there is someone in charge of sensing current and tension in each strip ...

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ledesma javier

hace 5 años

Thank you very much friend. I'm going to do what you want. Then I comment

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ledesma javier

hace 5 años

Rafael. I entered the advanced mode and found nothing to lower the backlight voltage

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rafael marcelo stag

317

hace 5 años

If, for example, I gladly put a resistor to lower the current in a strip (this friend called an integrated control circuit will detect through his sensing that something is wrong ... And he will proceed to protect the circuit by turning it off .... It is very important to know how this section behaves regardless of brand and model ...

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ledesma javier

hace 5 años

Thank you very much colleague.

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nicomena2015

9.501

hace 5 años

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hace 5 años

hello colleague: enter the user menu and check if you have the option (BACKLIGHT) .... if you have it down to 50-60% ... and see results ... ok ... greetings !!!

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ledesma javier

hace 5 años

Hi nicomena2015. He had already done that. Thank you very much for your suggestion. Regards

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nicomena2015

9.501

hace 5 años

well ... I leave you in case you are interested in watching this video ... here they lower the tension for them from the service mode ... comment if it is useful ... greetings!
https://www.youtube.com/watch?v=EOMn_wQe6Rw
https://www.youtube.com/watch?v=SO-qXVgW09I

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ledesma javier

hace 5 años

Good afternoon everyone. Reduce the voltage by modifying R765 2R20. Entering service mode I did not find anything related to the backlight. To enter factory mode enter menu-image-2 + 0 + 8 + 0. Thank you very much to the colleagues who kindly collaborated on this topic. Regards.

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nicomena2015

9.501

hace 5 años

hello colleague: ... thanks for sharing the solution ... this will remain in the solutions archive ... for other colleagues who, this failure is presented ... greetings!

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