Emerson LC401EM2F Blows fuse

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  • tecdiver
    New Member
    • Apr 2013
    • 3
    • USA
    #1

    Emerson LC401EM2F Blows fuse

    Hello all. New to the forum and looking for some help. I have a similar problem with the power supply blowing the 8A fuse. I have been through several threads on this power supply but it seems I have a different problem. Found the blown fuse and checked several of the diodes and found one shorted through. The diode that I replaced is the one circled in red. Now after reading a couple of threads I check the diode D1208 but it tested good. Now I did find a service bulletin that said if this diode is found bad you should just remove it. So just by chance I removed it, the spot is circled in Green. Still have the short but what I found is that if I leave the cable off coming from the tuner, which I believe is what activates all of the power supply sections, the fuse is fine. This connector is circled in blue. Now I can have the ribbon cable that powers the tuner connected, circled in orange, and I do not have a problem. Kind of lost at this point and looking for some guidance. Thanks
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    • tecdiver
      New Member
      • Apr 2013
      • 3
      • USA
      #2
      Re: Emerson LC401EM2F Blows fuse

      Ok, after some more testing I found the 3 MPR resistors have no resistance. Has anyone heard of these shorting out? I would think if they failed it would be a open circuit. Maybe I am testing them wrong but on the 200 ohm setting I get .001.

        Comment

        • MisterD
          Badcaps Veteran
          • Oct 2012
          • 668
          • United States
          #3
          Re: Emerson LC401EM2F Blows fuse

          On the main page for troubleshooting TV's you will see in upper right "Search This Forum" I suggest you enter your model number here and look at other Threads and Posts to see if you can get some good information about it. Here is a link to one of them that had a blown fuse.

          https://www.badcaps.net/forum/showth...ight=lc401em2f

            Comment

            • MisterD
              Badcaps Veteran
              • Oct 2012
              • 668
              • United States
              #4
              Re: Emerson LC401EM2F Blows fuse

              Originally posted by MisterD
              On the main page for troubleshooting TV's you will see in upper right "Search This Forum" I suggest you enter your model number here and look at other Threads and Posts to see if you can get some good information about it. Here is a link to one of them that had a blown fuse.

              https://www.badcaps.net/forum/showth...ight=lc401em2f
              Sorry, I guess you already did that. I didn't notice it the first time I read post #1

                Comment

                • retiredcaps
                  Badcaps Legend
                  • Apr 2010
                  • 9271
                  #5
                  Re: Emerson LC401EM2F Blows fuse

                  Originally posted by tecdiver
                  Ok, after some more testing I found the 3 MPR resistors have no resistance.
                  Are you measuring the resistors in circuit? If yes, some other component could be causing false readings.
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                    Comment

                    • Iloveamanda12
                      New Member
                      • Jun 2015
                      • 1
                      • USA
                      #6
                      Re: Emerson LC401EM2F Blows fuse

                      Was this issue ever resolved? I'm having the same issue and am failing in fixing it.

                        Comment

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