Sanyo DP32746 DP32746-00 Inverter Board

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  • kevinm34232
    Badcaps Legend
    • May 2012
    • 1884
    • USA
    #1

    Sanyo DP32746 DP32746-00 Inverter Board

    The symptom is a brief flash of backlight then it goes out. TV is powering on with sound.

    Fuse F100 was open and intinially replaced it and TV worked for awhile. It soon failed again..

    Found F100 and F101 were open, and 2 shorted mosfets. Apparently a common issue on this board.

    Can I just replace the 2 mosfets, or should I replace the 4 on this side of the board, or all 8?
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    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Sanyo DP32746 DP32746-00 Inverter Board

      It looks like each pair of the MOSFET drive 4 transformers, you may have bad transformer that may take out the new MOSFET. Do you have ringer tester to test the transformers? You may be safe just to replace the MOSFET as a pair.
      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

        • kevinm34232
          Badcaps Legend
          • May 2012
          • 1884
          • USA
          #3
          Re: Sanyo DP32746 DP32746-00 Inverter Board

          I tested transformers all have close to 1.845k ohms resistance on secondaries and ring good. I ordered 10 of these mosfets from China for about $7, could not find them anywhere in the states.. 2 fuses ordered from Digikey

          F100: F2587CT-ND
          F101: F2920CT-ND
          Mosfets are AO4614A

          I'll post the results, unfortunately this board is going for a high price, not worth it..
          Last edited by kevinm34232; 06-15-2013, 10:29 PM.

            Comment

            • martino
              Not so "senior"
              • Aug 2013
              • 997
              • canada
              #4
              Re: Sanyo DP32746 DP32746-00 Inverter Board

              Wondering how you made out with this??? Same problem on mine and curious if your fix worked or if I should get a new board...
              Proud owner of dozens of broken TV's and many,many,many boards.


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

                Comment

                • kevinm34232
                  Badcaps Legend
                  • May 2012
                  • 1884
                  • USA
                  #5
                  Re: Sanyo DP32746 DP32746-00 Inverter Board

                  Yes sorry I forgot to post that it DID fix it.

                    Comment

                    • splitcrete
                      Badcaps Veteran
                      • Dec 2012
                      • 387
                      • usa
                      #6
                      Re: Sanyo DP32746 DP32746-00 Inverter Board

                      I just changed two mosfets on the same board and tv .The backlight came right on for a whole 10 seconds. If I shut the power off by the button remote or unplug it will start backlight for another 10 seconds then black with sound. Any Ideas would be appreciated. Thank You

                        Comment

                        • splitcrete
                          Badcaps Veteran
                          • Dec 2012
                          • 387
                          • usa
                          #7
                          Re: Sanyo DP32746 DP32746-00 Inverter Board

                          Going to get new glasses . One of the mosfets I changed didn't get any solder on number 2 pin. It would turn on back lights for 10-15 seconds and then off. Took inverter back out and went over my work thats when I seen the missing solder. I re soldered the mosfet and now the set works like new.

                            Comment

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