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Wharfedale Titan Sub A12 , schematic/advice please

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    Wharfedale Titan Sub A12 , schematic/advice please

    Hi all

    There's a loud thump noise at power up , then nothing .

    Anyone experienced on these units ?

    #2
    Re: Wharfedale Titan Sub A12 , schematic/advice please

    First casualties ..

    Q17 & Q18 , both type IRFP4229


    Q17 S/C , & will also replace Q18 as they seem to work together .

    Now on order & will update thread once parts arrive .
    Attached Files

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      #3
      Re: Wharfedale Titan Sub A12 , schematic/advice please

      schematic
      Attached Files

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        #4
        Re: Wharfedale Titan Sub A12 , schematic/advice please

        Thanks very much Lotas

        Comment


          #5
          Re: Wharfedale Titan Sub A12 , schematic/advice please

          Back onto this repair .

          C52 , 10MF , 25V , POOR ESR
          Attached Files

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            #6
            Re: Wharfedale Titan Sub A12 , schematic/advice please

            Also replacing drive chip for Q17 & Q18 . Looks a bit stressed & wouldn't want to take a chance .

            It lives on a sub module , REF U9 , type Infineon IR2011S
            Attached Files

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              #7
              Re: Wharfedale Titan Sub A12 , schematic/advice please

              C40 , 2.2MF , yellow SMD cap faulty .

              Lives on same sub module as drive chip .
              Attached Files

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                #8
                Re: Wharfedale Titan Sub A12 , schematic/advice please

                C19 ,10mf , 100v ,poor esr
                Attached Files

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