Hello, I would like to know if someone can guide me on how to measure the output voltages of the backlight of a led samsumg, its power supply which is also the source backlight has the code BN44 -00609A the idea is to activate the source and measure the voltages without connecting the LED strips and thus verify that the source is fine [img] https://adjuntos.yoreparo.com/imagen_post/0004/16/479d77bf1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1db1bb1 img]

[quote] the source will deliver all the voltages when connected to the network, if you have a short LED, it could revive the protection, so before connecting the source, first place the tip of the tester in the place to be measured, and comment on the voltage gives you, if it does not give you any voltage you could have damaged the dcdc converter [/quote] Hi, make the measurements between pins 3 and 6, 9 and 12 there is no voltage also measured on the capacitors marked C 9118 and C9218 and measured 290 v. Looking at the board it has printed Led drive uotput for this tv 42 "CH1 147v 280mA, CH2 195v 280mA, I also measured the D3N40 on the diode scale and they are ok.