Blaupunkt B32A122T - no power

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  • dick_barton
    Badcaps Legend
    • Aug 2015
    • 6642
    • Wales

    #21
    Re: Blaupunkt B32A122T - no power

    Originally posted by chabregas2k
    I tested the mosfet with the multimeter.. the basic open close / charge discharge test.

    RB148 reads 0.4Ohm

    Mosfet is MDF7N60B

    When taking the pics for you, i found RB108 to be "funny looking" so i measured it to 8.7kohm (onboard). Should read 22 Ohm am i right??

    Thanks for all your time once again!
    If RB108 has 223 written on it then it would be 22K ohms. However if it is 222 then it would be 2K2 ohms. Can't quite read what is on the resistor.

    What resistance does RB147 have.
    Last edited by dick_barton; 06-24-2021, 09:12 AM.
    Willing to help but I'm no expert.

    Comment

    • chabregas2k
      Member
      • May 2021
      • 24
      • Portugal

      #22
      Re: Blaupunkt B32A122T - no power

      Originally posted by dick_barton
      What is the diode number written on it?
      SR3200 - Shorted original one.

      Ive got here SF50GG and SB5100. Any of these are aceptable replacements?
      Otherwise ill have to order... or struggle with the donor pile

      Comment

      • dick_barton
        Badcaps Legend
        • Aug 2015
        • 6642
        • Wales

        #23
        Re: Blaupunkt B32A122T - no power

        The SR3200 is 200V @ 3A so it looks like the SF50GG (400V @ 5A) should work.
        Last edited by dick_barton; 06-24-2021, 09:22 AM.
        Willing to help but I'm no expert.

        Comment

        • chabregas2k
          Member
          • May 2021
          • 24
          • Portugal

          #24
          Re: Blaupunkt B32A122T - no power

          Heres something new....

          good thing i have a picture of the "before"
          this happened as soon as i flipped the power switch.
          Attached Files

          Comment

          • dick_barton
            Badcaps Legend
            • Aug 2015
            • 6642
            • Wales

            #25
            Re: Blaupunkt B32A122T - no power

            CB101 appears to have vapourized. What other component burnt up?
            What is the part number for UB101
            Last edited by dick_barton; 06-24-2021, 09:52 AM.
            Willing to help but I'm no expert.

            Comment

            • chabregas2k
              Member
              • May 2021
              • 24
              • Portugal

              #26
              Re: Blaupunkt B32A122T - no power

              Mdp 36r da
              Attached Files

              Comment

              • dick_barton
                Badcaps Legend
                • Aug 2015
                • 6642
                • Wales

                #27
                Re: Blaupunkt B32A122T - no power

                The MDP36R looks as though it may be an LD7536RGL which is a PWM controller IC
                I would suspect it has been damaged so I would also check the mosfet to see if it's short circuit.
                Attached Files
                Last edited by dick_barton; 06-24-2021, 11:54 AM.
                Willing to help but I'm no expert.

                Comment

                • cheeky2
                  Badcaps Veteran
                  • Dec 2012
                  • 337
                  • uk

                  #28
                  Re: Blaupunkt B32A122T - no power

                  Originally posted by chabregas2k
                  Heres something new....

                  good thing i have a picture of the "before"
                  this happened as soon as i flipped the power switch.
                  I would also check the resistor RB148 circled in white in attached picture as look vaporised in the middle
                  Attached Files

                  Comment

                  • dick_barton
                    Badcaps Legend
                    • Aug 2015
                    • 6642
                    • Wales

                    #29
                    Re: Blaupunkt B32A122T - no power

                    Also clean the area up with some alcohol and some cotton buds to remove the carbon debris.
                    Willing to help but I'm no expert.

                    Comment

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