SHARP/BESTBUY LC-50LB481U Need to lower current to led"s

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • mykolas
    Member
    • Mar 2014
    • 18
    • usa

    #21
    Re: SHARP/BESTBUY LC-50LB481U Need to lower current to led"s

    I guess what I'm asking is which resistors and at what value should I start at? I'm just looking for a head start, I don't want to make a bad mistake



    Mykolas

    Comment

    • phantom 1221
      New Member
      • Dec 2020
      • 1
      • Trinidad

      #22
      Re: SHARP/BESTBUY LC-50LB481U Need to lower current to led"s

      Are there any new updates to this thread? I am about to order new led strips for my tv, and I would also like to know which resistors to change and what would be their values. This is the first time I am repairing anything.

      Comment

      • sam_sam_sam
        Badcaps Legend
        • Jul 2011
        • 6044
        • USA

        #23
        Re: SHARP/BESTBUY LC-50LB481U Need to lower current to led"s

        Originally posted by phantom 1221
        Are there any new updates to this thread? I am about to order new led strips for my tv, and I would also like to know which resistors to change and what would be their values. This is the first time I am repairing anything.
        Welcome to the forum

        Please post pictures of your boards and the LEDs strips that you have

        Comment

        Related Topics

        Collapse

        • Pipolups
          Corsair K70 LUX RGB dying LEDs
          by Pipolups
          Hi there !

          I'm having an issue for several weeks with my quite old K70 LUX RGB keyboard. I haven't used it for few months, and once I setup up again my desktop computer, I got several dead LEDs on that keyboard. I tried the Corsair troubleshooting thing (disabling options in iCUE, ...) but nothing changed so I conclude that for some reason some LEDs went in retirement...😅
          Decision taken to change these LEDs as I have access to desoldering iron and binocular magnifier, I wrote a ticket to tech support, hopping to obtain the LEDs reference and... They refused to tell me 🙄...
          10-08-2024, 11:58 AM
        • JayPoorJay
          Sharp 70' LEDs Spike 260v at start up?
          by JayPoorJay
          Hi all. This is my second thread. Have a bunch of questions.

          I got my hands on a 70 inch Sharp Aquos LC70EQ10U. Not working when I found it.

          I replaced the power board (found in eBay) and the TV finally produced an image. Reset it had image and sound.. Went from 2 slow and 2 fast blinks as a fault code to 1 slow 1 fast fault. Lamps or inverters according to the manual. TV is one now, at this moment (looks great w/ ZERO dark spots on screen) but it powering up and producing an image is unpredictable. 3 out of 10 times.

          There are 3 leads to the LEDs....
          02-01-2022, 05:04 PM
        • ngth82
          Modifying Insignia NS-55D510NA17 SMPS for lower current LEDs
          by ngth82
          Good morning bad caps -

          I have an Insignia NS55D510NA17 TV that I bought for $20. The there are 50 backlights in the TV and 48 or so are BLUE and this appears to be due to the yellow film/coating breaking down on each individual LED. (See picture; camera picks this up as purple... they are really blue). The LED itself looks to be an exposed die. There is no plastic package for them. I couldn't find much information about the LEDs or a direct discrete replacement either. These come from the LED strip - SVH550AC3_5LED_REV05_150410.

          Anyway, I would like to replace...
          03-08-2020, 12:44 PM
        • tmhobadcap
          Samsung un65h6203af led replacement question
          by tmhobadcap
          This tv is with sound but no picture. When light shines on the screen, we can see the image. This is a typical backlight problem. I opened it and found quite a lot of the leds are damaged. But the damaged ones are all shorted. No one is open. Is there a special reason? (From my past experience, both can be happened)

          When I supply 3V to each of the good leds, the currents range from 105mA to 154mA. From these figures, I think the leds are 3V and about 0.5W. I plan to replace all the damaged leds only (because the price of the led strips is very expensive), but I could not find 3V 0.5W...
          10-03-2023, 11:37 PM
        • Easky15
          Sharp LC-39LD145K No Power to LEDs
          by Easky15
          Hi all, Been a while since ive had to use this forum,
          I have here a Sharp LC-39LD145K that works fine apart from no power to the backlight LEDs, I have stripped it right down and tested all LEDs and they all work fine, I can see them flash briefly for a split second when powered up, the voltage to them slowly drops away after the flash so im guessing there is an issue with the power board,

          I think the model number on that is 17IPS20 and here is some pics of it

          Any help on this would be greatly appreciated,

          Thanks...
          05-10-2020, 07:11 AM
        • Loading...
        • No more items.
        Working...