Test LED TV strip

[budm]

Re: Test LED TV strip

We currently use multiple 9Volt Batteries connected - to + to multiply the voltage considering how many individual leds are in a particular strip.

For example if we have 30 led's in a strip then, for safety sake we consider that circuit to need 90 volts

So, we will connect 10 9 Volt Batteries together to obtain the needed 90 volts (Most Sharp LED TVs require 94 Volts. So 90 volts is safe

Take a look at the attached you tube video to see

https://www.youtube.com/watch?v=ZSJ4ETkLTF4

We have however, on occasion could not determine the exact amount of Led's in a particular strip (In this case we try 2 different methods) 1st we try locating the led strips either on eBay or Google and simply look at the picture and simply count them OR, we begin using lower voltages until one of the strips light. Usually starting at 27 volts and going up from there Or, we look at the LED Driver voltages when the LED Strip is unplugged and power the set on to determine the highest voltage and go from there

We have had some success by simply jumping the return wire from known working strip, while disconnecting or clipping the defective strip + & return wire to make sure the TV will work properly without

Although some technicians do not agree we have found that many TVs will operate satisfactory even missing one led (especially edge lit screens) without much notice at all. Just will not be as bright and vibrant as it was when new but, yet, still view-able.

At least this method does save many of these TVs from otherwise ending up in some landfill and, may allow someone the opportunity to enjoy a LED TV that could not otherwise afford such

Hope this helps someone or many people viewing this forum

Without current limiter you can damage good LED if some of the LEDs on the strip are shorted out.

[electronicsurplus]

Re: Test LED TV strip

That would work ONLY IF you cat something small enough to tough the points of the Led

2nd, Some Leds are multi Leds meaning they have 4 connections 2 for dim and 2 for bright

And, Also, IF you have the entire Screen removed from the panel

My method works WITHOUT removing the Led strip or even the screen. Directly from the input from the back of the TV