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  • Author Author: Former Member
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Replacing TV LEDS

Former Member

Am looking for some generic part numbers to try out as replacements for individual surface mount white LEDs that have failed in TV backlights. They are used in strips of various numbers of LEDs in series and controlled by pulse width modulated regulated current.

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  • Between eBay and YouTube, there is a myriad of information.  To start with you will need to get the panel's model #.  It's VERY different from what's on the back of the cabinet.  Pull the screen and look for a sticker on the back.  You start from the model # you find.

  • in reply to Former Member

    That information does not apply. I don't want to replace the strips, just the individual white LEDs that have failed on the original strips. I need to match the surface mount package, lense, light output, current, voltage, and color temperature. There must be some generic part numbers that can be ordered from distributors that are similar to those the TV manufacturers use. There would have to be some experimentation required and a variety of parts may be required. I would be sharing this information with TV servicers in a group that I belong to. Most modern TVs are not economically repairable if we can not repair them at a component level.

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  • in reply to Former Member

    That information does not apply. I don't want to replace the strips, just the individual white LEDs that have failed on the original strips. I need to match the surface mount package, lense, light output, current, voltage, and color temperature. There must be some generic part numbers that can be ordered from distributors that are similar to those the TV manufacturers use. There would have to be some experimentation required and a variety of parts may be required. I would be sharing this information with TV servicers in a group that I belong to. Most modern TVs are not economically repairable if we can not repair them at a component level.

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  • in reply to Former Member

    Hi Jerome,

     

    There are some "standard" sizes of LEDs, but also unusual sizes, and the variations beyond that are quite large in terms of viewing angle, color temperature, etc as you say. Even within a main part code they may also be binned to match so that the LEDs in a strip are consistently bright. Possibly you may want to purchase a few dozen or so different types in the size you need, and experiment with them. I think it will be difficult to achieve a match in this manner, but perhaps it can be "close enough" - I've no idea though, this is just a guess. : (

    I've never opened up a TV with LED backlight - could you post a photo of a typical strip showing the LED?

    After you've measured an LED up as precisely as you can, you can see the LEDs here http://uk.farnell.com/leds-high-brightness-high-power-white-over-75ma and attempt to match at least the physical size and take a guess on the color temperature (or use a test card) and viewing angle.

  • in reply to Former Member

    As Shabaz says there are all sorts as you already probably know and the strip will be supplied as an assembly from the manufacturer and probably even they don't remember where they got them from. Have you taken a pic of the markings on the LEDs maybe some one will know them. Remember that even with models there are various bins of luminance and colour temperature so you would be better off  replacing the strip as they are cheap any way.

  • in reply to Problemchild

    Thats what I was trying to point to.  YouTube has videos on disassembling down to the led strip.