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Samsung BN44-00342B Diode ID Help

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    #1

    Samsung BN44-00342B Diode ID Help

    well Fellas I am a NUBE but I hope I can show I am not completely Clueless with in my first real Post.

    I USED THE SEARCH I PROMISE!

    I Just picked up a 9 month old samsung LN55C630 55" LCD TV No Video had sound was the Symptom. I assumed Caps I have fixed a couple TVs with cap Issues. When I removed the covers and pluged it in It Imeadatley made the high pitche squeel and i could smell Ozone off the power supply! I knew the Squeel ment Diode!

    On the Board in the in Locaton DP180 there is a Diode Marked MUR 460 001
    it was clearley Smoked it was Hot in a matter of seconds and the board had some discoloration and the Diode was Split! I tested the Diode with my Multi meter and its Zeroed out both Directions After I unSoldered it from the Board.

    So here is where I need some help. anyone have any idea how to get the Data of what I need to replace this Diode? when I type into Google MUR460 001 I get this back http://html.alldatasheet.com/html-pd.../1/MUR460.html and that says its a Super fast Rectifier?????? UMMM OK?

    the back of the Board shows your standard Diode Symbol stripe to the left???

    Also I would Like to know if anyone knows what may have been the Likely the reason this part Failed? Do I still have a bad Cap maybe that caused it??? Or any suggestions on other things I should check???
    Tags: None
    #2
    Re: Samsung BN44-00342B Diode ID Help

    PS.
    I am in IOWA
    I didnt get a chance to take a pic here is one off the net



    the Burnt resistor is Just under the Horizontal Large Cap

    Dont yell at me Bill I didnt take that pic with the Flash on!

    Comment

      #3
      Re: Samsung BN44-00342B Diode ID Help

      Hey the set makes the hum as soon as the cord is pluged in! I forgot to mention that in my orig post.

      Comment

        #4
        Re: Samsung BN44-00342B Diode ID Help

        That is a high current fast recovery diode. Here is the datasheet:

        MUR460 Datasheet

        Comment

          #5
          Re: Samsung BN44-00342B Diode ID Help

          Originally posted by IRace93 View Post
          PS.
          I am in IOWA
          I didnt get a chance to take a pic here is one off the net



          the Burnt resistor is Just under the Horizontal Large Cap

          Dont yell at me Bill I didnt take that pic with the Flash on!
          1. Don't post pictures inline. It seriously inconveniences retiredcaps and pisses off others - there are threads that I now ignore because some yahoo loaded it with oversize pictures.

          2. We need pictures of YOUR power supply.

          3. Four posts to do what could have been done with one - typical newbie mistake.

          4. The MUR460 is a 4.0A, 600V Ultra Fast Recovery Diode and is available for $.65 to $.84 from Digi-Key.

          5. As to why it failed - it's hard to tell without a picture of the power supply that failed, isn't it?

          PlainBill
          For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

          Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

          Comment

            #6
            Re: Samsung BN44-00342B Diode ID Help

            Well Bill I am sorry I am such a Nube!

            The supply in the pic is not Failed. But the one I removed Clearly Failed its cracked and Burnt as well as heat marks on the board. the board shows No other Signs of failure no buldged caps or obvious loose items. I will get one found or ordered and search the board for any cold connections.

            Thank you for the post Critique! I will try to fall inline in the future. You guys are a Wealth of knowledge! I love it!

            Comment

              #7
              Re: Samsung BN44-00342B Diode ID Help

              Originally posted by IRace93 View Post
              Well Bill I am sorry I am such a Nube!

              The supply in the pic is not Failed. But the one I removed Clearly Failed its cracked and Burnt as well as heat marks on the board. the board shows No other Signs of failure no buldged caps or obvious loose items. I will get one found or ordered and search the board for any cold connections.

              Thank you for the post Critique! I will try to fall inline in the future. You guys are a Wealth of knowledge! I love it!
              The fact that the supply continued to work surprises me. Still, don't spend too much time determining why, just replace the diode as planned.

              PlainBill
              For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

              Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

              Comment

                #8
                Re: Samsung BN44-00342B Diode ID Help

                Thank you Bill I looked the bored over really hard today. (Home with Penumonia) and I am no starager to Cold solders and cracks (I Race Small honda cars Dirt oval. Think I shake some Ecu's or main relays apart?)........and I have to say this has to be the most crap-tastic Job I have ever seen! I went over the whole board with a Nice hot precision Iron and lil Flux. there were alot of points that look suspect!

                In my reading on here I expected cheap shotty board but this in Insane I am sure happy I didnt pay top dollar for this tv!

                Diode will be here in a day or two I will Post how it goes! Thank you all again!

                Comment

                  #9
                  Re: Samsung BN44-00342B Diode ID Help

                  Originally posted by IRace93 View Post
                  Thank you Bill I looked the bored over really hard today. (Home with Penumonia) and I am no starager to Cold solders and cracks (I Race Small honda cars Dirt oval. Think I shake some Ecu's or main relays apart?)........and I have to say this has to be the most crap-tastic Job I have ever seen! I went over the whole board with a Nice hot precision Iron and lil Flux. there were alot of points that look suspect!

                  In my reading on here I expected cheap shotty board but this in Insane I am sure happy I didnt pay top dollar for this tv!

                  Diode will be here in a day or two I will Post how it goes! Thank you all again!
                  Lead free solder is the bane of the electronics tech.

                  PlainBill
                  For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

                  Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

                  Comment

                    #10
                    Re: Samsung BN44-00342B Diode ID Help

                    Yahoo! .93 Cents later!

                    Bought the tv less than a year old for $40 and with your help and 93 Cent Diode! Its AWESOME!

                    Victory Pics!

                    [/ATTACH]
                    Attached Files

                    Comment

                      #11
                      Re: Samsung BN44-00342B Diode ID Help

                      Originally posted by IRace93 View Post
                      Bought the tv less than a year old for $40 and with your help and 93 Cent Diode!
                      Congrats on the repair.

                      Wasn't this 9 month old LCD TV under warranty?
                      --- begin sig file ---

                      If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                      We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                      Please do not post inline and offsite as they slow down the loading of pages.

                      --- end sig file ---

                      Comment

                        #12
                        Re: Samsung BN44-00342B Diode ID Help

                        Rich Guy Said repair was gonna be Hassle! Who am I to Tell him!

                        Comment

                          #13
                          Re: Samsung BN44-00342B Diode ID Help

                          Originally posted by IRace93 View Post
                          Rich Guy
                          Ah! Good for you. You got a nice TV. A brand new 55 inch LCD still costs over $1,000.
                          --- begin sig file ---

                          If you are new to this forum, we can help a lot more if you please post clear focused pictures (max resolution 2000x2000 and 2MB) of your boards using the manage attachments button so they are hosted here. Information and picture clarity compositions should look like this post.

                          We respectfully ask that you make some time and effort to read some of the guides available for basic troubleshooting. After you have read through them, then ask clarification questions or report your findings.

                          Please do not post inline and offsite as they slow down the loading of pages.

                          --- end sig file ---

                          Comment

                            #14
                            Re: Samsung BN44-00342B Diode ID Help

                            I am pretty Extatic! I fixed a 36" Poliroid blown caps real simple then stumbled across this 55 Figured Even if I couldnt fix it i could part it out and make money! But I am a Happy camper! Merry X mas to me! Guy had the Box the books and the remote! he packed it up for me!

                            Comment

                              #15
                              Re: Samsung BN44-00342B Diode ID Help

                              Originally posted by IRace93 View Post
                              I am pretty Extatic! I fixed a 36" Poliroid blown caps real simple then stumbled across this 55 Figured Even if I couldnt fix it i could part it out and make money! But I am a Happy camper! Merry X mas to me! Guy had the Box the books and the remote! he packed it up for me!
                              Damn. Beats my 42" I got from the local tip. Cost £20 to buy it from them and had four bad capacitors, was a dead easy fix (cost around £5 all in and had some spare caps left over to repair a Samsung 40".) Will need to look around for a nice 50-55" TV now... of course not at a retail price...
                              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

                                #16
                                Re: Samsung BN44-00342B Diode ID Help

                                Hello guys,
                                My tv has a PSU # BN44-00342B.
                                It stopped all of a sudden due to power failure, as you see it is a ceramic green Cap that has blown, but unfortunately nothing left from it so ican get a replacement; can someone help?
                                Tx
                                Attached Files

                                Comment

                                  #17
                                  Re: Samsung BN44-00342B Diode ID Help

                                  https://www.badcaps.net/forum/showth...141#post621141
                                  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

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