vizio va370m regulators

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  • doughboy0032
    Member
    • Jan 2013
    • 12
    • us

    #1

    vizio va370m regulators

    hello. i know im asking about another dreaded vizio, not to mention the va370m. My Tv just gave my the Vizio Logo screen of "confusion" It just sits on the vizio screen and nothing i do will make it go past it. anyway i got it figured out where its the main and was testing regulators and had one dead, however I cant find it online. Any Ideas of where to get it? I include a pic of it. its the G903T63B (903t63) Help please.



    BTW BAD CAPS IS AWESOME!

    MIKE
    Attached Files
  • selldoor
    Slow Learner
    • Dec 2010
    • 7870

    #2
    Re: vizio va370m regulators

    Perhaps one of these would work

    http://www.digikey.com/product-detai...3GG-ND/2546107

    Check/compare datasheets. Care re physical size so it fits the pads
    Please upload pictures using attachment function when ask for help on the repair
    http://www.badcaps.net/forum/showthread.php?t=39740

    Comment

    • doughboy0032
      Member
      • Jan 2013
      • 12
      • us

      #3
      Re: vizio va370m regulators

      I talked to digikey when I ordered the other ones. They say its not available and they claim there is no cross reference. I would think there something comparable and compatible.

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: vizio va370m regulators

        May I ask what voltage readings you get on all 3 pins? It looks like 1117 series LDO
        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

        • doughboy0032
          Member
          • Jan 2013
          • 12
          • us

          #5
          Re: vizio va370m regulators

          Ill have to check when I get home. I'm at work til 9p. If I remember correctly it went 5-3.2-0

          Comment

          • budm
            Badcaps Legend
            • Feb 2010
            • 40746
            • USA

            #6
            Re: vizio va370m regulators

            One of the pin is at Ground, so 0V reading, the 5 must be the input which is 5V, the middle pin/big tab is the out put pin, 3.2V? The out put should be within 2% (3.23V = 2%). So it looks like it is OK.
            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

            • doughboy0032
              Member
              • Jan 2013
              • 12
              • us

              #7
              Re: vizio va370m regulators

              Now don't quote me on that lol. Ill have to make sure but I think either far right or left was the 0.
              I didn't see any bad caps or anything.... without pulling and testing them all.

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #8
                Re: vizio va370m regulators

                From your picture, the pin on the right is the ground pin, left pin is the Input.
                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

                • doughboy0032
                  Member
                  • Jan 2013
                  • 12
                  • us

                  #9
                  Re: vizio va370m regulators

                  OK ill have to plug the board back in and test them all again when I get home

                  Comment

                  • doughboy0032
                    Member
                    • Jan 2013
                    • 12
                    • us

                    #10
                    Re: vizio va370m regulators

                    OK reg 903t63 is 5-3.2- 0. Reg 17809 is 5-3-0a reg g9084-50(big one on bottom of board)
                    is 9-4-0

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #11
                      Re: vizio va370m regulators

                      "Reg 17809 is 5-3-0a reg g9084-50" I am not familiar with these numbers of the regulator.By the way, the problem you are having right now is that you so have backligts with VIZIO logo on the screen, that is? It will not do anything else, but you can still turn it off? It sound like corruption of EEPROM?
                      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

                      • doughboy0032
                        Member
                        • Jan 2013
                        • 12
                        • us

                        #12
                        Re: vizio va370m regulators

                        Correct. The screen comes up black with vision screen and that's it. Can turn it off and on. It just started. It would take longer and longer to start up and some days it would start immediately. Then 2work weeks ago just the vision screen. I think I just found some bad caps on the power board...not popped but a little mustard color film. So u saying dead main?

                        Comment

                        • budm
                          Badcaps Legend
                          • Feb 2010
                          • 40746
                          • USA

                          #13
                          Re: vizio va370m regulators

                          Not sure.
                          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

                          • doughboy0032
                            Member
                            • Jan 2013
                            • 12
                            • us

                            #14
                            Re: vizio va370m regulators

                            Lol I love this little TV. The sound is good and has a good pic....better than my moms 40" LG. And my friends over priced wall frame.id be willing to spend 10-15my in cap to save 100 for a new board or new TV yet. Any other tests you recommended?

                            Comment

                            • selldoor
                              Slow Learner
                              • Dec 2010
                              • 7870

                              #15
                              Re: vizio va370m regulators

                              Originally posted by budm
                              "Reg 17809 is 5-3-0a reg g9084-50" I am not familiar with these numbers of the regulator.

                              Budm - Think those are the voltages on the 3 different regulators. He was testing when he got back home.
                              Reg 903t63 is
                              5V
                              3.2v
                              0.v

                              Reg 17809 is
                              5v
                              3v
                              0v

                              reg g9084-50(big one on bottom of board)
                              is
                              9v
                              4v
                              0v


                              DB have you tried getting into the service menu to do a reset - sometimes you can get menus when the rest is scrambled

                              https://www.badcaps.net/forum/showpo...33&postcount=6

                              I think I researched 903t63 and it is a fixed 3.3 600ma so if it was the correct physical size the one I suggested would do as a replacement but looks like you dont need one.
                              Please upload pictures using attachment function when ask for help on the repair
                              http://www.badcaps.net/forum/showthread.php?t=39740

                              Comment

                              • doughboy0032
                                Member
                                • Jan 2013
                                • 12
                                • us

                                #16
                                Re: vizio va370m regulators

                                I cant even get a menu to pop up (if im doing it right anyway) Its just vizio screen. Off topic the tcon board is giving some weird readings on the regulators also. I still have to check that other regulator to see if it would fit, Do you want me to just measure with a tape measure?

                                Comment

                                • doughboy0032
                                  Member
                                  • Jan 2013
                                  • 12
                                  • us

                                  #17
                                  Re: vizio va370m regulators

                                  Replaced all the capacitor on power board and still no progress

                                  Comment

                                  • doughboy0032
                                    Member
                                    • Jan 2013
                                    • 12
                                    • us

                                    #18
                                    Re: vizio va370m regulators

                                    ok found the measurements of the 903t63b. Not sure where to go now. any sugestions?
                                    Attached Files

                                    Comment

                                    • electronicsurplus
                                      Badcaps Veteran
                                      • Jun 2012
                                      • 210
                                      • USA

                                      #19
                                      Re: vizio va370m regulators

                                      Why don't you use LM1117 3.3V
                                      Which are simply 3.3 Low Voltage drop out Voltage Regulators
                                      They are available all over EvilBay for about $1 or so each

                                      I use them all the time and work fine for me

                                      Sometimes you can actually reflow the original and this works also using a heat gun on the regulator
                                      This Forum absolutely the best and, the most helpful forum I have ever found anywhere. thanks to all the fantastic members here
                                      Help keep these from the landfills

                                      Comment

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