Samsung 32UA4000R LCD TV

[angelos]

Hi all. A friend of mine said reducing the backlight voltage with some degree could lengthen the life of the leds. He said that he would go into service mode and change it there. He said that not all manufacturers have such a setting in service mode. I normally modify the led driver circuit by changing a resistor slightly.
Question. Does anyone know on the samsung series 4 brand is there a setting that can adjust this voltage?
Question. Check my picture i added. This circuit is very different from what i know. There are 4 pairs of wires going to the backlights. How do i modify this to drop the voltage?
Have a look at the plug connection that goes to the led's

[budm]

Re: Samsung 32UA4000R LCD TV

We need to see good straight shot pictures of the whole bottom side of the board.
Power supply/LED driver board P/N BN44-00604C.
BTW, you drop current through the LEDs, LED is the current device and it uses constant current power supply to maintain constant current through the LED.
There is current sensing resistor/s that you need to increase the resistance to reduce the LED current.

[angelos]

Re: Samsung 32UA4000R LCD TV

Hi Budm. I had to release the set to the customer. Next time i get another one in we will take pictures on both sides. Thanks