Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

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  • DXseekerMO
    Badcaps Legend
    • Feb 2018
    • 1119
    • US

    #21
    Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

    Originally posted by R_J
    This schematic is not exact but seems close although the location numbers and values are different, but it might help.
    Thanks for posting the schematic R_J!

    I plugged the PS in to AC voltage. I have 165V on pin 4 and 1.65v on pin 2. All the other pins show no voltage.

    I see no damaged components off the gate of Q9101.

    At this time, and without specific instructions on what to check and how to check it I've reached the top of my pay grade.
    They call me......."threadkiller"

    Comment

    • R_J
      Badcaps Legend
      • Jun 2012
      • 9517
      • Canada

      #22
      Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

      I would replace the ic (get a couple) It is likely damaged internally so it won't drive the mosfet.
      This type of ic usually has an internal startup cell which takes the voltage on pin4 and supplies a low current voltage to pin 7 vcc, this low current supply charges the external cap on the vcc pin and when it gets above a certain voltage (10~15v) the ic will drive the mosfet. A similar ic which has a datasheet is the SSC1S311A
      Last edited by R_J; 09-11-2021, 10:12 AM.

      Comment

      • DXseekerMO
        Badcaps Legend
        • Feb 2018
        • 1119
        • US

        #23
        Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

        Originally posted by CloudyOne72
        Followimg as I have the exact same issue and would love to know which resistor i correct
        The resistor I ordered: https://www.mouser.com/ProductDetail...IQ8EgDhXKBc%3D is identical in appearance to the bad resistor I replaced, save for the black band at the end.

        It looks like IC U9101 is bad on my board as well. Replacing the components I ordered did not restore the TV to operation.
        They call me......."threadkiller"

        Comment

        • DXseekerMO
          Badcaps Legend
          • Feb 2018
          • 1119
          • US

          #24
          Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

          Originally posted by R_J
          I would replace the ic (get a couple) It is likely damaged internally so it won't drive the mosfet.
          This type of ic usually has an internal startup cell which takes the voltage on pin4 and supplies a low current voltage to pin 7 vcc, this low current supply charges the external cap on the vcc pin and when it gets above a certain voltage (10~15v) the ic will drive the mosfet. A similar ic which has a datasheet is the SSC1S311A
          R_J, do you have a source you trust for these? I see several from AliExpress but they are coming from Turkey or China. My first immediate concern is counterfeit components and my second is ordering with my credit card and that info getting stolen and/or misused.

          On the other hand there are packs of 10 or more available for these at what seems a decent price and I see a re-sale/profit opportunity for the ones I don't use.
          They call me......."threadkiller"

          Comment

          • CloudyOne72
            Member
            • Sep 2021
            • 10
            • United States

            #25
            Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

            I haven't checked mine but either way, I'm thinking I need a couple

            Comment

            • DXseekerMO
              Badcaps Legend
              • Feb 2018
              • 1119
              • US

              #26
              Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

              Originally posted by R_J
              I would replace the ic (get a couple) It is likely damaged internally so it won't drive the mosfet.
              This type of ic usually has an internal startup cell which takes the voltage on pin4 and supplies a low current voltage to pin 7 vcc, this low current supply charges the external cap on the vcc pin and when it gets above a certain voltage (10~15v) the ic will drive the mosfet. A similar ic which has a datasheet is the SSC1S311A
              Just wondering if you have a source for these you trust?
              They call me......."threadkiller"

              Comment

              • R_J
                Badcaps Legend
                • Jun 2012
                • 9517
                • Canada

                #27
                Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

                I don't have a source, it looks like the only suppliers are from China, maybe someone else has ordered from a supplier that also caries this part.

                Comment

                • diif
                  Badcaps Legend
                  • Feb 2014
                  • 6978
                  • England

                  #28
                  Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

                  I've bought from these in the past. https://www.aliexpress.com/item/4000843488182.html

                  Comment

                  • DXseekerMO
                    Badcaps Legend
                    • Feb 2018
                    • 1119
                    • US

                    #29
                    Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

                    Originally posted by R_J
                    I don't have a source, it looks like the only suppliers are from China, maybe someone else has ordered from a supplier that also caries this part.
                    Thanks R_J, I appreciate your help and knowledge. Maybe I'll wind up waiting for a good power supply in a busted TV. The busted part should be available, but with a good PS may take a while! Maybe someone knows a good reliable source?
                    They call me......."threadkiller"

                    Comment

                    • CloudyOne72
                      Member
                      • Sep 2021
                      • 10
                      • United States

                      #30
                      Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

                      So i was bored and went back to looking at this tv when I came across this..
                      Attached Files

                      Comment

                      • CloudyOne72
                        Member
                        • Sep 2021
                        • 10
                        • United States

                        #31
                        Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

                        @DXseekerMO any chane your looks the same?

                        Comment

                        • DXseekerMO
                          Badcaps Legend
                          • Feb 2018
                          • 1119
                          • US

                          #32
                          Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

                          Originally posted by CloudyOne72
                          @DXseekerMO any chane your looks the same?
                          Sorry I didn't reply to your previous message, it's exterior house and porch clean-up time in these parts lol.

                          Here's a pic of mine, it isn't blown out like yours but do note the discoloration in the same area.

                          EDIT/ADD: I didn't mean to add the picture of the antennas but I did design and build them for DTV DXing! lol I've received over-the-air TV to 539 miles with these.
                          Attached Files
                          Last edited by DXseekerMO; 09-28-2021, 09:45 PM.
                          They call me......."threadkiller"

                          Comment

                          • diif
                            Badcaps Legend
                            • Feb 2014
                            • 6978
                            • England

                            #33
                            Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

                            Originally posted by CloudyOne72
                            So i was bored and went back to looking at this tv when I came across this..
                            That looks like the marking commonly seen on the main EEPROM on a PCB, either a dot of varnish or paint is used.

                            Remove it from the board and read it to verify if it is actually blown.

                            Comment

                            • CloudyOne72
                              Member
                              • Sep 2021
                              • 10
                              • United States

                              #34
                              Re: Vizio D55un-E1, bad Q9100, C9100 & R9111, parts ordering questions

                              Now that you say that, I see it lol Well thatsgood news and bad lol.

                              Comment

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