Fixing Toshiba Regza 37" LCD TV

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  • stj
    Great Sage 齊天大聖
    • Dec 2009
    • 30991
    • Albion

    #21
    Re: Fixing Toshiba Regza 37" LCD TV

    yes, that's the idea

    Comment

    • ABuNeNe
      Member
      • Jul 2014
      • 25
      • India

      #22
      Re: Fixing Toshiba Regza 37" LCD TV

      Hi I managed to find a hair dryer and blew it on the inverter board, focusing particularly on the transistors (with regard to this post) and after 30 secs, the backlight went off.

      There are 4 transistors, wordings on them are DJ36AH FDD 8447L, in this inverter board, am I correct to say one, particularly the one on the most right, or maybe more of these transistors are faulty?



      Please advise what is my best option? Add heatsink onto the transistors, change transistors or change inverter board?

      Comment

      • selldoor
        Slow Learner
        • Dec 2010
        • 7870

        #23
        Re: Fixing Toshiba Regza 37" LCD TV

        OK first thing to try might be to check the soldering on them and the transformer.
        They can be quite difficult to remove so if you can narrow it down to one by sheilding
        and heating one at a time would be worthwhile.
        Please upload pictures using attachment function when ask for help on the repair
        http://www.badcaps.net/forum/showthread.php?t=39740

        Comment

        • Mogador12
          Member
          • Jul 2014
          • 40
          • french

          #24
          Re: Fixing Toshiba Regza 37" LCD TV

          Hello there
          I can dir What is the value of the zener diode that red and yellow and green thank you for your help


          https://www.badcaps.net/forum/attach...1&d=1406742079
          Attached Files

          Comment

          • ABuNeNe
            Member
            • Jul 2014
            • 25
            • India

            #25
            Re: Fixing Toshiba Regza 37" LCD TV

            Hi selldoor, sorry noob here so don't understand what you mean.

            Originally posted by selldoor
            OK first thing to try might be to check the soldering on them and the transformer.
            Do you mean check the soldering using the hair dryer? How do I do that?

            Originally posted by selldoor
            They can be quite difficult to remove so if you can narrow it down to one by sheilding
            and heating one at a time would be worthwhile.
            What do you mean by remove? Using the hair dryer to remove the transistor and the transformer?

            Narrow it down by shielding is to isolate which component is faulty? Can I roll up a piece of paper and point one end to each component with the hair dryer blowing the other end?

            Comment

            • martino
              Not so "senior"
              • Aug 2013
              • 997
              • canada

              #26
              Re: Fixing Toshiba Regza 37" LCD TV

              Selldoor is telling you it's difficult to desolder those transistors,so yes,take a rolled up piece of paper or whatnot,so that you can aim the hot air from the hair dryer onto one component at the time,to try and find the one that's giving you trouble...
              Desoldering you do with a solder gun,not a hair dryer.
              Proud owner of dozens of broken TV's and many,many,many boards.


              Our website and passion:http://hollenhundshepherds.com/

              Comment

              • ABuNeNe
                Member
                • Jul 2014
                • 25
                • India

                #27
                Re: Fixing Toshiba Regza 37" LCD TV

                I got myself a replacement inverter board, 6632L-0522A (original one is 6632L-0541A) and replaced it. The picture runs fine for about an hour and then went black. I tried to restart the tv and now it's always black with the audio playing.

                I emailed the seller and showed him this video, he replied that the inverter board he sold me have this protection mode which will be activated when it detect a problem. He told me to remove the protection by shorting the capacitor in circle in red.



                I'm skeptical, any idea what should I do?
                Last edited by ABuNeNe; 08-12-2014, 07:38 AM.

                Comment

                • ABuNeNe
                  Member
                  • Jul 2014
                  • 25
                  • India

                  #28
                  Re: Fixing Toshiba Regza 37" LCD TV

                  I googled and found out there is something call bypass inverter protection.

                  Has anyone done this before?

                  Comment

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