Sony SMPS No backlight

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  • ljintexas
    LJinTexas
    • Jan 2015
    • 669
    • USA
    #41
    Re: Sony SMPS No backlight

    I replaced T302. No pop! Yay!! But no video either. I then took a chance and replaced IC801. We have video!!

    Thanks to everyone for your time!

    LJ

      Comment

      • Dannyx
        CertifiedAxhole
        • Aug 2016
        • 3912
        • Romania
        #42
        Re: Sony SMPS No backlight

        I think IC801 was to blame all along. The transformer was fine. Good job. Is it "durable" this time ? Does it still turn off after X minutes ?
        Wattevah...

          Comment

          • nomoresonys
            Badcaps Legend
            • Jan 2013
            • 12235
            • U.S.
            #43
            Re: Sony SMPS No backlight

            Originally posted by R_J
            IC706 is not likely damaged, but IC801 might be damaged by the shorted Q800
            Nailed it again, R_J=Supertech.
            Last edited by nomoresonys; 12-15-2018, 11:08 AM.

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA
                #44
                Re: Sony SMPS No backlight

                Glad to hear that you got it going, so you had failure in the inverter circuit, then failure in the PFC circuit. hope they will both hold up.
                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

                  • ljintexas
                    LJinTexas
                    • Jan 2015
                    • 669
                    • USA
                    #45
                    Re: Sony SMPS No backlight

                    So far, so good. Survived a 12 hour burn in over night.

                      Comment

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