Vizio VW42L -No Power/Fuse keeps blowing

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  • selldoor
    Slow Learner
    • Dec 2010
    • 7870

    #41
    Re: Vizio VW42L -No Power/Fuse keeps blowing

    Hi part numbers look good. For the 2E one perhaps put up a closeup picture
    someone may recognise something.
    Attached Files
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

    Comment

    • vote4pedro
      Member
      • Jul 2012
      • 33
      • US

      #42
      Re: Vizio VW42L -No Power/Fuse keeps blowing

      Thanks for the data sheet. I have attached a close up pic of the 2E FET. I hope you can recognize this.

      I had a dumb question about ordering, I have also attached a word file with my ordering question. I didn't know if i needed to be concerned with the bottom numbers when ordering these?


      Thanks alot
      Attached Files

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #43
        Re: Vizio VW42L -No Power/Fuse keeps blowing

        There's definitely a marking below 2E if you look carefully.

        Try this trick:
        http://electronics.stackexchange.com/a/5410
        Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
        For service manual, schematic, boardview (board view), datasheet, cad - use our search.

        Comment

        • selldoor
          Slow Learner
          • Dec 2010
          • 7870

          #44
          Re: Vizio VW42L -No Power/Fuse keeps blowing

          ^^ I Agree
          We need CSI on this failing that perhaps you could do something with the original picture as it obviously degrades each time its saved. ( That is why I have saved as bmp on this occasion)

          I get the attached which looks like it starts with 20 - not a lot of help but gives you the idea - I messed with color depth etc then changed to a negative view.
          Attached Files
          Please upload pictures using attachment function when ask for help on the repair
          http://www.badcaps.net/forum/showthread.php?t=39740

          Comment

          • selldoor
            Slow Learner
            • Dec 2010
            • 7870

            #45
            Re: Vizio VW42L -No Power/Fuse keeps blowing

            I have talked myself into believing it could be 20NK50 something

            What does anyone else think.
            Attached Files
            Please upload pictures using attachment function when ask for help on the repair
            http://www.badcaps.net/forum/showthread.php?t=39740

            Comment

            • selldoor
              Slow Learner
              • Dec 2010
              • 7870

              #46
              Re: Vizio VW42L -No Power/Fuse keeps blowing

              Originally posted by vote4pedro

              I had a dumb question about ordering, I have also attached a word file with my ordering question. I didn't know if i needed to be concerned with the bottom numbers when ordering these?


              Thanks alot
              No they are just manufacture information date, place and factory codes.
              Please upload pictures using attachment function when ask for help on the repair
              http://www.badcaps.net/forum/showthread.php?t=39740

              Comment

              • vote4pedro
                Member
                • Jul 2012
                • 33
                • US

                #47
                Re: Vizio VW42L -No Power/Fuse keeps blowing

                The chalk trick worked.....

                Here are the bottom numbers from the Q801 FET that I thought
                just had an (2) (E)

                The bottom numbers are:
                Q801
                20N60C3
                GKE717

                I attached a pic of it.


                Thanks alot...
                Attached Files

                Comment

                • vote4pedro
                  Member
                  • Jul 2012
                  • 33
                  • US

                  #48
                  Re: Vizio VW42L -No Power/Fuse keeps blowing

                  Is there a datasheet for this part available?
                  Q801
                  20N60C3
                  GKE717



                  Thanks,

                  Comment

                  • jetadm123
                    Badcaps Legend
                    • Feb 2010
                    • 2169

                    #49
                    Re: Vizio VW42L -No Power/Fuse keeps blowing

                    Looks like this one:

                    http://www.digikey.com/product-detai...C3IN-ND/509556

                    Comment

                    • vote4pedro
                      Member
                      • Jul 2012
                      • 33
                      • US

                      #50
                      Re: Vizio VW42L -No Power/Fuse keeps blowing

                      Thanks everyone for your help with this issue....

                      I will get the parts ordered and let you guys know how it goes

                      Comment

                      • vote4pedro
                        Member
                        • Jul 2012
                        • 33
                        • US

                        #51
                        Re: Vizio VW42L -No Power/Fuse keeps blowing

                        I'm having a little trouble figuring out which one of these I need to order. I have
                        this one below that jetadm123 helped me find. What is the difference between SPW or STP.
                        The other 2 FET's started with STP11NK50ZFP that I will be ordering.

                        This one starts with SPW
                        SPW20N60C3
                        http://www.digikey.com/product-detai...C3IN-ND/509556

                        just curious, I wanted to make sure I was buying the correct item.

                        Thanks again

                        Comment

                        • Mr Bill
                          Badcaps Veteran
                          • Nov 2011
                          • 648
                          • USA

                          #52
                          Re: Vizio VW42L -No Power/Fuse keeps blowing

                          The "SPW" and "STP" denote the manufacturer. The 11NK50ZFP & 20N60C3 is the critical infromation on the part. A lot of different companies make the same parts.

                          Comment

                          • selldoor
                            Slow Learner
                            • Dec 2010
                            • 7870

                            #53
                            Re: Vizio VW42L -No Power/Fuse keeps blowing

                            I know for sure that the ST and SP parts are the manufacturer.
                            I am not sure about the 3rd letter may be the manufacturers series?

                            The main part number is the 11NK50ZFP & 20N60C3

                            Edit
                            Mr Bill beat me to it
                            Please upload pictures using attachment function when ask for help on the repair
                            http://www.badcaps.net/forum/showthread.php?t=39740

                            Comment

                            • vote4pedro
                              Member
                              • Jul 2012
                              • 33
                              • US

                              #54
                              Re: Vizio VW42L -No Power/Fuse keeps blowing

                              Thanks alot for explaining this to me, huge help....

                              Comment

                              • vote4pedro
                                Member
                                • Jul 2012
                                • 33
                                • US

                                #55
                                Re: Vizio VW42L -No Power/Fuse keeps blowing

                                Hey guys bad news, I got the new FET's in the mail and I soldered them in. I replaced these 3:

                                Q801
                                20N60C3

                                Q601
                                P11NK50ZFP

                                Q602
                                P11NK50ZFP

                                I put in a new fuse and when I plugged the power cord into the TV, the fuse blew instantly again. I'm using the same fuse rating only difference is I have a glass fuse and not a ceramic that came in it.

                                You have any ideas? I will have to remove the power board, I will post some pics later.

                                just wanted to give an update and see if you guys had any other ideas on what could be going on?

                                Thanks

                                Comment

                                • killian6pk
                                  Badcaps Veteran
                                  • Apr 2010
                                  • 502
                                  • USA

                                  #56
                                  Re: Vizio VW42L -No Power/Fuse keeps blowing

                                  Originally posted by vote4pedro
                                  Hey guys bad news, I got the new FET's in the mail and I soldered them in. I replaced these 3:

                                  Q801
                                  20N60C3

                                  Q601
                                  P11NK50ZFP

                                  Q602
                                  P11NK50ZFP

                                  I put in a new fuse and when I plugged the power cord into the TV, the fuse blew instantly again. I'm using the same fuse rating only difference is I have a glass fuse and not a ceramic that came in it.

                                  You have any ideas? I will have to remove the power board, I will post some pics later.

                                  just wanted to give an update and see if you guys had any other ideas on what could be going on?

                                  Thanks
                                  Are you sure that you are using the correct type of fuse? There are fast and Slo Blo Fuses that have the same specs example: 4Amp 250Volt in each type. Also there are both ceramic and glass types of these fuses.
                                  Have you ever stopped to think and then forget to start thinking again?

                                  As a very wise man once said on this forum: "Of all the things I have lost I miss my mind the most."

                                  Comment

                                  • Th3_uN1Qu3
                                    Believe in
                                    • Jul 2010
                                    • 6031
                                    • Romania

                                    #57
                                    Re: Vizio VW42L -No Power/Fuse keeps blowing

                                    http://antiqueradio.org/dimbulb.htm

                                    Get into the habit of using one of those when powering up anything that has had a blown fuse. If something downstream is shorted, the bulb will save you fuses, MOSFETs, and a whole bunch of other parts. Use a 40-60W bulb for small sets and a 100W bulb for large ones. The bulb will always be enough to start the set in standby mode if all parts are good.

                                    Check the MOSFETs that you replaced. You may have the nasty surprise that they're all gone again.
                                    Originally posted by PeteS in CA
                                    Remember that by the time consequences of a short-sighted decision are experienced, the idiot who made the bad decision may have already been promoted or moved on to a better job at another company.
                                    A working TV? How boring!

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #58
                                      Re: Vizio VW42L -No Power/Fuse keeps blowing

                                      This is what I built.
                                      http://s807.photobucket.com/albums/yy352/budm/Tools/
                                      What I do before applying power to the unit with new parts installed is to verify that there is no shorts first.
                                      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

                                      • vote4pedro
                                        Member
                                        • Jul 2012
                                        • 33
                                        • US

                                        #59
                                        Re: Vizio VW42L -No Power/Fuse keeps blowing

                                        I will double check the fuse's I bought to make sure. They should be slow blow fuses, just glass not ceramic.

                                        Comment

                                        • vote4pedro
                                          Member
                                          • Jul 2012
                                          • 33
                                          • US

                                          #60
                                          Re: Vizio VW42L -No Power/Fuse keeps blowing

                                          I checked my fuses, here is what the marking on them were:

                                          original fuse in TV - T6.3AH250VP (ceramic fuse)

                                          I'm not sure what the "T" in front of 6.3 is and what the "H" and the "P" represents.

                                          replacement fuse from Radio Shack - 6.3Amp 250v Slow Blow (Glass Fuse)

                                          Does the replacement fuse appear to be the same rating as the original?

                                          If they are the correct ratings, what should I do next?

                                          Do I have to un-solder the new FET's and retest them?

                                          I do like the idea of the light bulb to test with, I had a question just to make sure I understand, the other end I have marked in the pic does get plugged into live 110v power and the light bulb keeps the fuses and other parts from failing?
                                          Attached Files
                                          Last edited by vote4pedro; 08-02-2012, 09:34 PM.

                                          Comment

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