kogan kaled46blswc Picture fades to the left side

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  • andy smethurst
    Member
    • Feb 2010
    • 49
    • Australia
    #1

    kogan kaled46blswc Picture fades to the left side

    Hellow:
    This LED LCD works fine, but the screen fades a lot from the middle
    towards the left side. This is a gradual fade becoming darker towards
    the left. This fade is from top to bottom.

    The Right hand top corner of the case gets very hot,but not the left
    side.

    I found four outputs from the power board for the LED's.
    There are 2 for each side of the screen.

    I tested the voltage of the 2 that go towards the R side (good side)
    of the screen, and found: 21.5v and 21.2v this looks good to me.
    On the 2 that supply the left side, I found: 11v and 31.7v.



    Both totals are 42.7v, but the Left side isn't divided eaqualy.
    It seams to me that there is a OC in one line or a short in the
    other. It could be a short, as this would explain the hot R hand
    side.
    I tested these outputs with the plugs to the LED's connected.
    I have not worked on led backlights before, only used to ccfl's.

    I would like to know if it's ok to pull the plugs to test power board
    outputs without damage, and would there be a service manual for
    these cheap tv's, as i've tried the usual sites, without luck.

    Also, being new to led backlights, are they hard to get at, and
    can they be repaired individualy,or do you have to replace the
    lot.??

    Thankyou for any advice
    Regards: Andy.
    Tags: None
    • tw2005
      Badcaps Legend
      • Oct 2011
      • 6458
      • Australia
      #2
      Re: kogan kaled46blswc Picture fades to the left side

      I'm going to skip on all the good bits because I'm not a LCD dude, but what panel has it got? I've got a kaled463D1 with samsung panel, which has panel failure

        Comment

        • andy smethurst
          Member
          • Feb 2010
          • 49
          • Australia
          #3
          Re: kogan kaled46blswc Picture fades to the left side

          Hi, this thing has a ROHS panel not a samsung.
          These must be a clone of some other brand, and renamed Kogan for Australia, and perhaps
          a few other areas. All the components,and the way they are put togeather looks
          cheap and nasty, with no familiar named components.

            Comment

            • tw2005
              Badcaps Legend
              • Oct 2011
              • 6458
              • Australia
              #4
              Re: kogan kaled46blswc Picture fades to the left side

              ROHS ? I thought that was a standard?

                Comment

                • tw2005
                  Badcaps Legend
                  • Oct 2011
                  • 6458
                  • Australia
                  #5
                  Re: kogan kaled46blswc Picture fades to the left side

                  Pop some picture up. you're not going to find any info or manuals on these but I'm a little curious to see if any similarities with mine

                    Comment

                    • andy smethurst
                      Member
                      • Feb 2010
                      • 49
                      • Australia
                      #6
                      Re: kogan kaled46blswc Picture fades to the left side

                      Hi, this thing has a ROHS panel not a samsung.
                      These must be a clone of some other brand, and renamed Kogan for Australia, and perhaps
                      a few other areas. All the components,and the way they are put togeather looks
                      cheap and nasty, with no familiar named components.

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK
                          #7
                          Re: kogan kaled46blswc Picture fades to the left side

                          RoHS = EU standard for restriction of Lead and other components... not a panel standard... like CE or FCC mark... or A-Tick in Oz
                          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                            Comment

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