De que VOLTAJE son los LEDS de un TV ? como saberlo sin datos

Hello, here we are again in another video which I hope will always be useful for you in comments of previous videos there were questions on how to know or determine the voltage of the LEDS on the TV strips you can search for your code, but thatsame code can come for several voltages and there are cases in which the necessary information is not available, in order to replace them well this is very easy to determine and maybe many will know how to perform this test but let's make a tool so you do not have to be improvising every time they need to perform these tests it will also serve them forany other type of LED as a complement we will measure the current with which a lighting panel of a television works and based on that, in thenext video we will make a circuit that works with less milliamps and that it can be used as an alternative source to replace permanentlythe original source this in case of irreparable damage or you can also use it toconvert to LED TVs of CCFL lamps we start we need an ac / dc converter with12 volt direct current output I recommend you identify the positivewith the multimeter and then mark it, it can be simply with a knot to be able to identify it we also need 2 "alligators" onered and one black thermal insulation or insulating tape a resistance of 1 K ohms some red and black probes I had these, which were damaged from the other end to the "alligators" we are going to cut in twoparts of the black we will use only the mostlittle and red we will make a cutapproximately the same distance and we will useboth parts now the longest red alligator, we will place it to the positive of the converter then we will place the resistance of a 1 K ohms and we will proceed to isolate it now at the other end of the resistance, we will place the probe and the other small section of the red "alligator" let's solder and we will also isolate it, it will be this way we will proceed to do the same with the black probe and the black "alligator" well the idea is the following with thisconverter through resistance let's apply voltage in these tipstowards the LEDS and the "caimans" in the short sections, will be used to place the multimeter and that will help us determinethe voltage that LEDs need let's connect .

.

.

here we will see the voltage .

.

.

we have 12 vdc and we are going to perform some quick tests this is a yellow LED we see that it has a consumption of 2.

3 vdc This is a blue LED of high luminosity and we see that it has a consumption of 2.

9 vdc a red LED .

.

.

2 volts and finally a green LED we will now test the LEDS of some TV strips we apply the voltage we see that it lights up and with a consumption of 2.

7 volts .

.

.

.

.

we go with the other and we see that it has a consumption of 5.

3 VDC so we determined that these LEDs are 3 volts and that these are 6 ok, in the first strip we could see that the voltage was 2.

7 volts in each LED we determine then that those LEDs are approximately 3 volts In this type of strips, the LEDs are usually from 3.

2 to 3.

6 volts and in this other there was 5.

3 volts, so we deduce that they are 6 volts remember that it is only a test and we are applying the voltage through a resistance of 1 K ohms and it is not calculated for the capacity of each LED if they find a damaged LED andwants to replace it with another of a strip that you have of recovery use the tester and compare the 2, they should measure the same consumption voltage there are more types of LEDs and for different voltages but these are the most common 3 and 6 volts and use them only as an example Of course it will also be veryUseful to test the LEDs individually in our TV strips and so to be able to determine which one isis damaged likewise the converter will followserving, to apply 12 volts by the tip of the "caiman" that goes before the resistance and the black "alligator", here we have 12 volts and also if we join the two points of the red "alligators", we eliminate the resistance and we will have 12 volts that we can apply from our probes for any other purpose well let's check now with how muchvoltage works the panel of this TV for the next video, we will uncover it and see how many LEDs it has and we will divide the voltage oftotal consumption, among the number of LEDs to see how much voltage each LED consumes we will also verify with how many milliamps this panel works there it turns on the blue LED, right nowwill illuminate the panel there it is already illuminated and we see that it hasa consumption of 50 volts let's disconnect one of the sidesthat go towards the lighting panel and there we are going to place some "alligators" towards the probes now the multimeter, we put it on the scale that says 10 amperes and we passed the red terminal to this connector that says 10 amperes and with that we can measure the current flowing in the lighting panel let's now connect andturn on is already on we see that the panel is illuminated and we havea current of 360 milliamps the new televisions normallythey come pre-adjusted to the maximum brightness and that makes the LEDs work at theirMaximum capacity so it is recommended to lower the backlight by 20% so that your LEDs have more time to live Well, that is all for now see you in the next video if GOD allows it See you soon.

Leave a Reply