Vizio VW42L -No Power/Fuse keeps blowing

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #61
    Re: Vizio VW42L -No Power/Fuse keeps blowing

    T is for Time Delayed, Slo-blo will be equivalent. That is the correct drawing of using the lamp to automatically limit the current in case of short circuits. 100W incandescent will be good start. That plug does goes into your wall outlet, I use GFI outlet and Isolation transformer as a protection against accidental shock if you happen to touch the live primary circuits.
    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

      #62
      Re: Vizio VW42L -No Power/Fuse keeps blowing

      what do you guys think, I guess I need to take the FET's back off the board and re-test them. If they were to be bad again what can be causing them to go bad?

      Comment

      • vote4pedro
        Member
        • Jul 2012
        • 33
        • US

        #63
        Re: Vizio VW42L -No Power/Fuse keeps blowing

        Hey guys

        It seems like the issue with this TV is isolated to the power supply board. How much would a new power board cost? I still can't seem to figure out which components are shortening out.

        Do you think that a new power board would fix the issue?

        Thanks,

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #64
          Re: Vizio VW42L -No Power/Fuse keeps blowing

          Check shopjimmy.com
          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

            #65
            Re: Vizio VW42L -No Power/Fuse keeps blowing

            Thanks I will check out that website, in your past experiences with these sort of issues, does this make sense for me to go the route of getting a new power board for this TV?

            I'm just on the fence on what I should.


            Thanks,

            Comment

            • vote4pedro
              Member
              • Jul 2012
              • 33
              • US

              #66
              Re: Vizio VW42L -No Power/Fuse keeps blowing

              I found a great price on shopjimmy.com for the power supply board.

              Do you think this is the main issue of the TV?
              It seems to be isolated to the power supply.


              thanks just asking before I order the power supply board

              Comment

              • vote4pedro
                Member
                • Jul 2012
                • 33
                • US

                #67
                Re: Vizio VW42L -No Power/Fuse keeps blowing

                what do you guys think?? Since the TV is blowing fuses and I cant seem to locate what is shortening out, should buying a new power supply board fix this problem??
                Just needing some advise

                Originally posted by vote4pedro
                I found a great price on shopjimmy.com for the power supply board.

                Do you think this is the main issue of the TV?
                It seems to be isolated to the power supply.


                thanks just asking before I order the power supply board

                Comment

                • brandonros
                  New Member
                  • Dec 2013
                  • 5
                  • USA

                  #68
                  Re: Vizio VW42L -No Power/Fuse keeps blowing

                  Hi, I realize this is a very old post but I'm having the exact same trouble instantly blowing fuses each time I plug imy Vizio tv in. This came after replacing several leaky capacitors after having weird tv screen issues. For me, I test my bridge rectifier and get an open circuit on the 1-2 pins (if 1 is negative) and 2 is the near AC. All others test ok and I get the same readings with the BR outside of the board. Is this BR trash and if so, will the FETs necessarily be blown too? They don't show any open circuits when I test them.
                  Thanks!

                  Comment

                  • brandonros
                    New Member
                    • Dec 2013
                    • 5
                    • USA

                    #69
                    Re: Vizio VW42L -No Power/Fuse keeps blowing

                    No one?

                    Comment

                    • vinceroger69
                      Badcaps Legend
                      • Mar 2012
                      • 6714
                      • uk

                      #70
                      Re: Vizio VW42L -No Power/Fuse keeps blowing

                      check you have fitted all the caps the right way on the board i messed up 1 once kept blowing a fuse.

                      Comment

                      • brandonros
                        New Member
                        • Dec 2013
                        • 5
                        • USA

                        #71
                        Re: Vizio VW42L -No Power/Fuse keeps blowing

                        Thanks for the tip Vince. I checked it out and I believe they're all in the correct position. I'm worried my bad solder job when I put them back in may have caused the short to begin with but I fixed that. I'm hoping replacing the bridge rectifier will fix everything.

                        Comment

                        • vinceroger69
                          Badcaps Legend
                          • Mar 2012
                          • 6714
                          • uk

                          #72
                          Re: Vizio VW42L -No Power/Fuse keeps blowing

                          they may be in the correct positions but are they fitted the right way as in the minus side marking of the capacitor is on the minus side on the psu.
                          whats the rectifer part number maybe find a data sheet for the pin layouts
                          Last edited by vinceroger69; 12-14-2013, 05:53 PM.

                          Comment

                          • brandonros
                            New Member
                            • Dec 2013
                            • 5
                            • USA

                            #73
                            Re: Vizio VW42L -No Power/Fuse keeps blowing

                            Yeah, sorry I understood what you meant with positive and negative and I matched the replacement up to what the old one was and then matched it with the '+' on the board to positive on the capacitor. The rectifier is part number D15XB60. I ordered a couple from Electric Goldmine yesterday. I did find a data sheet pic of it but I'm not sure with these rectifiers, would it be normally be an open circuit one way on the #3-#4(-) pins? If so, then maybe that wasn't the problem. http://www.dz863.com/datasheet-81447..._Bridge-Diode/
                            Last edited by brandonros; 12-15-2013, 12:17 AM.

                            Comment

                            Related Topics

                            Collapse

                            • Dannyx
                              UC3842 Power Adapter Blowing Fuse
                              by Dannyx
                              Good day folks......wow this new layout is weird. It's like I woke up one day and I'm no longer on Planet Earth or something

                              Anyway....got this here power brick from a USB to SATA adapter which keeps blowing the fuse after I almost repaired it. The reason I even bother to fix a power brick (wall wart, whatever) in the first place is because this thing was really convenient to use: I'd just plug it and that's it. It's a dual output supply, for both 12v and 5v, which although I COULD easily obtain with a DC-DC converter from a standard 12v adapter, I thought I should crack open the...
                              12-05-2023, 12:06 PM
                            • Tips
                              Samsung PD27AOQ (BN44-00506B) constantly blowing internal fuse.
                              by Tips
                              Looking for some assistance please.
                              Trying to repair a PD27AOQ samsung power board.
                              Initially had the typical problem of cm806 capacitor blown, additionally thermistor NT801s blown.
                              Replaced the ceramic capacitor, str60252s, bridge rectifier, thermistor and fuse.
                              Testing it the fuse blows immediately power is turned on.
                              diodes dm852 and dm853 test as shorted when in the board but fine when removed.
                              any assistance, guidance would be appreciated.
                              04-11-2024, 11:24 AM
                            • RogerH58
                              Samsung 46" TV LE46B530 blowing fuse
                              by RogerH58
                              Hi all,

                              I am a newbie and not very experienced so bear with me if i struggle sometimes with technical language - but I'll do my best. I searched "Samsung" and the model number on the forum but didn't find anything I could understand!

                              I'm not an electronics guy - just picked up stuff over the years through my flight-simming hobby.

                              I have the above mentioned 46" tv as the monitor for my flight-sim setup. Recently it went "crack" and stopped working. No standdby light and no response. I assumed a fuse had blown and after investigation...
                              06-10-2023, 10:27 AM
                            • bscottjohnston
                              Vizio M55-E0 won't power on - fuse intact
                              by bscottjohnston
                              Vizio PSLL241206M inside an M55-E0.

                              Here's an odd one. Why in the world do I have 76 VAC on the fuse when I have measured 115 VAC on the input power cord? Does this point to something known or simply another SMPS problem I need to run down?...
                              02-20-2024, 12:18 PM
                            • corrize
                              A funny fuse story – Lumix LX100 II
                              by corrize
                              Hello, I disassembled this dead camera, and found this WTF… Two fuses soldered one above the other !
                              I was pretty sure nobody touched it before, but that can't be from factory. There is flux, and capacitor is probably missing.
                              The other weird thing : the fuses are « G » fuse : (0.75A – 8V), seems very low. The original fuse should be « O » : (32V 2,5A).
                              There is « O » mark beside. All fuses have the same mark letter on main board. So, I can deduce it's a « O » fuse.
                              And this correspond to the issus I saw : when I plug the battery, I measure the voltage dropping...
                              10-19-2023, 09:58 AM
                            • Loading...
                            • No more items.
                            Working...