Comparison of LED Backlight Testers

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  • alexthefifth
    New Member
    • Jan 2019
    • 3
    • Canada

    #1

    Comparison of LED Backlight Testers

    Hi All,

    There seems to be a lot of devices on the market that claim to be LED backlight testers, ranging in price from $20 to $$$. Does anyone have experience with these particular types and can chime in if they're adequate for LED TV repair? I'm in North America so looking for devices that run on 100V but I included all voltages just in case it's useful for others.

    And yes, technically one could build a tester themselves, but if you're like me and are not very technically inclined then you'd rather spend $20 than learn how to solder :p

    Type #1 shopjimmy.com SID GJ2C LED TV Backlight Tester
    https://www.shopjimmy.com/sid-gj2c-l...n=sid-gj2c-led
    or much cheaper here: https://www.ebay.ca/itm/GJ2C-0-320V-...v7UQ:rk:1:pf:0



    Type #2 GJ2C alternate version
    ~28USD: https://www.ebay.ca/itm/GJ2C-0-320V-...ZsDg:rk:5:pf:0



    Type #3 DLV300
    $18.50 USD: https://www.ebay.ca/itm/New-0-300V-T...GvF:rk:84:pf:0



    Type #4 220V
    $16 USD: https://www.ebay.ca/itm/LED-Strips-T...Yox:rk:78:pf:0



    Type #5 KS210A
    ~$23 USD https://www.ebay.ca/itm/Digital-LED-...5jD:rk:83:pf:0



    Type #6 Blink 220V
    ~$23 USD https://www.ebay.ca/itm/AC220V-LED-T...Daz:rk:81:pf:0



    Type #7
    ~$23 USD https://www.ebay.ca/itm/AC-220V-Bead...s8X:rk:92:pf:0


    Type #8
    ~$23 USD https://www.ebay.ca/itm/0-200V-Outpu...QY:rk:104:pf:0
  • sam_sam_sam
    Badcaps Legend
    • Jul 2011
    • 6024
    • USA

    #2
    Re: Comparison of LED Backlight Testers

    Which one of these units do find is worth the cost of it

    Comment

    • alexthefifth
      New Member
      • Jan 2019
      • 3
      • Canada

      #3
      Re: Comparison of LED Backlight Testers

      Originally posted by sam_sam_sam
      Which one of these units do find is worth the cost of it
      I don't know lol I was hoping someone could tell me which are good and which are bad

      My aim is to spend ~$20 on a device that performs as well as a ~$50 one

      Comment

      • llonen
        Badcaps Veteran
        • Sep 2014
        • 495
        • hampshire

        #4
        Re: Comparison of LED Backlight Testers

        I got interested in the whole LED Backlight Tester gig some time ago with the view that it might speed up testing of said back lights, and came across a cheap example of the SID GJ2C I think I paid around £10.00 via Ebay. What I found along with others that have tried these is they don't really develop sufficient drive to adequately test the LED panel, kind of a good thing really as they can produce upwards to 300 volts across the probes and to me that is a potential safety issue.

        Overall findings then, having one is better than not having one, although they give very mixed results with bad led's often passing, I mean see what others say but I have mostly gone back to my old testing methodology. A variable high voltage supply (upto 60 volts) with current sense set) I can usually test one or more complete strips with this at varying loads.

        Hope this helps
        Last edited by llonen; 01-16-2019, 09:52 PM.

        Comment

        • kiko1
          Member
          • Apr 2016
          • 48
          • croatia

          #5
          Re: Comparison of LED Backlight Testers

          They all supply too low testing current....good thing is that you can adjust current but limit is R-C direct power from mains...20-30mA...not enough...I want 100mA, sometimes 250mA !
          and sometimes you have to wait few minutes with powered led bar to show up a problem.
          CV CC lab supply is perfect for testing separate led bars...never had a problem with that.

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: Comparison of LED Backlight Testers

            Output of 300Vdc @ 30mA is 9 Watts of power, so way you can do any mod to those LED tester to make it deliver 300V @100mA = 30 Watts.
            Those LED tester is not for 100% proving if the LED's are good or bad but it can tell if you have open circuit condition or not without disassemble the panel. It also help to verify if the video function is working or not if the backlights power supply went and you want to verify if video function is still OK or not by being able to light up the screen with the LED tester.
            Never stop learning
            Basic LCD TV and Monitor troubleshooting guides.
            http://www.badcaps.net/forum/showthr...956#post305956

            Voltage Regulator (LDO) testing:
            http://www.badcaps.net/forum/showthr...999#post300999

            Inverter testing using old CFL:
            http://www.badcaps.net/forum/showthr...er+testing+cfl

            Tear down pictures : Hit the ">" Show Albums and stories" on the left side
            http://s807.photobucket.com/user/budm/library/

            TV Factory reset codes listing:
            http://www.badcaps.net/forum/showthread.php?t=24809

            Comment

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