SMD inverter/coil

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  • Superglue
    New Member
    • Mar 2021
    • 8
    • United Kingdom
    #1

    SMD inverter/coil

    Hi, I need to replace a smd coil/ inverter on my Samsung laptop motherboard but I cant find any information on the schematic diagram for it, it just shows a curly wire symbol without any identification, they are small black rectangles with silver ends, they sit directly after the DC jack so 19/20v and when I check the resistance on the good one it measures a very low ohm reading just like you would get from measuring a small piece of wire, I'm not sure if they are used as a kind of fuse? I need to order one but I'm completely lost to what type and where to get one from, cheers.
    Attached Files
    Tags: None
    • diif
      Badcaps Legend
      • Feb 2014
      • 6978
      • England
      #2
      Re: SMD inverter/coil

      It's measuring correctly, they fail and go open. Why do you need to replace it ?

        Comment

        • Sametbey
          Badcaps Veteran
          • Jan 2021
          • 229
          • Turkey
          #3
          Re: SMD inverter/coil

          If you measure 19v from the adapter input to 0.1 ohm resistance, there is no problem with the coil. you can solder the coil directly.
          Attached Files
          Last edited by Sametbey; 04-04-2021, 06:32 AM.
          I'm not happy to be so strong. because it's not humanly

            Comment

            • Superglue
              New Member
              • Mar 2021
              • 8
              • United Kingdom
              #4
              Re: SMD inverter/coil

              Hi the coil failed and went open circuit, the one next to it is okay, there is normally two next to eachother but in my picture the failed one has been removed, I just need to find a replacement for the failed one .... cheers.
              Last edited by Superglue; 04-04-2021, 10:35 AM.

                Comment

                • ktmmotocross
                  Boardkiller
                  • Feb 2014
                  • 3570
                  • slovakia
                  #5
                  Re: SMD inverter/coil

                  its just 19V filter. u can jump it

                    Comment

                    • Superglue
                      New Member
                      • Mar 2021
                      • 8
                      • United Kingdom
                      #6
                      Re: SMD inverter/coil

                      Hi, I'd rather replace it if possible, I've found the part number its HU-1M2012-121JT can anyone recommend a good place to get components from?
                      Cheers

                        Comment

                        • SMDFlea
                          Super Moderator
                          • Jan 2018
                          • 20492
                          • UK
                          #7
                          Re: SMD inverter/coil

                          Originally posted by Superglue
                          Hi, I'd rather replace it if possible, I've found the part number its HU-1M2012-121JT can anyone recommend a good place to get components from?
                          Cheers
                          See R_J`s recommendation - https://www.badcaps.net/forum/showthread.php?t=53692
                          All donations to badcaps are welcome, click on this link to donate. Thanks to all supporters

                            Comment

                            • Superglue
                              New Member
                              • Mar 2021
                              • 8
                              • United Kingdom
                              #8
                              Re: SMD inverter/coil

                              Hi I've had a look at the link, I think he eventually just soldered two fuses in place, I've found these inductors and they are the closest I can find just with a higher max amperage 5 amps instead of 4.2 amps and the DC resistance is a bit different, I think these will be okay, what do you think? Thanks.

                              https://uk.farnell.com/mec-marcom/mf...805/dp/1308778

                                Comment

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