Sharp LC32D44E-BK backlight issue

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  • mitsukiso
    Member
    • Sep 2017
    • 31
    • Италия
    #1

    Sharp LC32D44E-BK backlight issue

    Hi guys!
    i've changed lamps on Sharp LC32D44E-BK (as far as google says it's the main problem of this model) and made the error reset. The TV worked fine for some days and turned back to the same problem. at some moment the lamps turn pink and then shut off. i've opened the tv to see the state of lamps and they seem fine. The transformators seem fine as well, have +- the same resistance.
    what could it be? bad contact with lams? should i solder them?.. i really like this TV, the image is much better than modern ones
    Thank you!
    Tags: None
    • Andrew F. Ali
      Badcaps Legend
      • Jan 2014
      • 2450
      • Trinidad & Tobago
      #2
      Re: Sharp LC32D44E-BK backlight issue

      Not having the TV in front of me and not posting any pictures for us to see, I would give a guess to either the wrong type backlight lamps were put in, bad lamps or bad Inverter if the lamp ends do not show any evidence of HV arcing.

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: Sharp LC32D44E-BK backlight issue

          Originally posted by mitsukiso
          Hi guys!
          i've changed lamps on Sharp LC32D44E-BK (as far as google says it's the main problem of this model) and made the error reset. The TV worked fine for some days and turned back to the same problem. at some moment the lamps turn pink and then shut off. i've opened the tv to see the state of lamps and they seem fine. The transformators seem fine as well, have +- the same resistance.
          what could it be? bad contact with lams? should i solder them?.. i really like this TV, the image is much better than modern ones
          Thank you!
          All the lamps light up pink, or just one lamp? CCFL when lights up pink is the sign of bad lamp. Are they new lamps or used lamps?
          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

            • mitsukiso
              Member
              • Sep 2017
              • 31
              • Италия
              #4
              Re: Sharp LC32D44E-BK backlight issue

              @budm they all appear pink, thats strange. all lamps are new, taken in china, but i think all spare parts are made there, so.. may be bad contact? may be the connectors got loose in years?

                Comment

                • dick_barton
                  Badcaps Legend
                  • Aug 2015
                  • 6642
                  • Wales
                  #5
                  Re: Sharp LC32D44E-BK backlight issue

                  The service manual is available from here

                  Do you have 60V @ fuse F7501 and also +13V and +9V on the inverter board when the lamps go pink in the event that one of the voltages are dropping.

                  The manual also says on the inverter board connector Lamp Error = 0V and Lamp OK = 3.2V
                  Willing to help but I'm no expert.

                    Comment

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