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Emerson LC401EM2F Blows fuse

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    #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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    #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.

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      #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

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        #4
        Re: Emerson LC401EM2F Blows fuse

        Originally posted by MisterD View Post
        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

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          #5
          Re: Emerson LC401EM2F Blows fuse

          Originally posted by tecdiver View Post
          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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            #6
            Re: Emerson LC401EM2F Blows fuse

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

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