Emerson LE220EM3 fuse problem.

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  • Spork Schivago
    Badcaps Legend
    • Mar 2012
    • 4734
    • United States of America

    #21
    Re: Emerson LE220EM3 fuse problem.

    Wow, that's amazing. I need to learn this skill, how to find compatible parts that meet or exceed the original ones. Thanks for the help Caleb! I haven't checked the large white resistor yet. I had some customers bring in a PC or two that I needed to repair first. I got them done now and will check the resistor in the near future. I still need:

    Q602 - Transistor 2SC2120-Y (TE2 F T)
    Q653 - Transistor SMD KTC3875S-Y-RTK/P

    I was thinking for the cap, maybe I could find a nice Rubycon some wheres for it. Thanks for helping me find compatible parts!
    -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full

    Comment

    • Caleb
      Smokin IC's
      • Feb 2013
      • 645
      • USA

      #22
      Re: Emerson LE220EM3 fuse problem.

      You can get 10 of the KTC3875S-Y-RTK/P for 3$ plus 2$ shipping
      and 5 2SC2120-Y for 2$ plus 2$ shipping from utsource on ebay
      Liberating magic smoke one part at a time

      Comment

      • Spork Schivago
        Badcaps Legend
        • Mar 2012
        • 4734
        • United States of America

        #23
        Re: Emerson LE220EM3 fuse problem.

        I'm sorry Caleb, You already said that once! It was a long day yesterday and I had a lot going on. I got everything picked out on Digikey, I'm going to try and find some replacement Rubycon caps for a power supply I'm working on at this time too so I can save on shipping. Any suggestions on how to find an equivalent capacitor? Do I just look for voltage and capacitance or does something in the datasheet give away what would be compatible? Thanks.
        -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full

        Comment

        • Caleb
          Smokin IC's
          • Feb 2013
          • 645
          • USA

          #24
          Re: Emerson LE220EM3 fuse problem.

          voltage and capacitance, low esr if they are filtering the output of a switch mode power supply, I usually stick with panasonic fm series as they meet pretty much every spec. Your 100 uf isn't likely to be used as a filter as its a very small capacitance but an fm stuck in there will outlast the rest of the tv. If you type panasonic fm into the search on digikey then click on aluminum capacitors then use the drop down filter for capacitance (maybe voltage too) then find the correct replacement in the list.

          Another thing to watch for is the physical size of the cap if your board doesn't have much room you don't want to get ones that are too fat or tall for the space
          Liberating magic smoke one part at a time

          Comment

          • Spork Schivago
            Badcaps Legend
            • Mar 2012
            • 4734
            • United States of America

            #25
            Re: Emerson LE220EM3 fuse problem.

            I don't know if they're filtering the output or not and I'm not even sure if it's a switched mode power supply. I'm 99% sure it is a switch mode, just not 100%. It's for a PC. It's a smaller guy. I posted something about it on Badcaps, asking for suggestions on replacement caps but never really got any. I'm thinking the caps that are bad are for filtering the output. I've seen pictures where it shows a bunch of caps next to the wires leaving the PSU and it says those are the output filtering caps. The caps that are bad here are all around the wires leaving the PSU. So, I should use low ESR FM series caps for filtering the output of switch mode power supplies. Can I always use low ESR FM series caps for anything? As a fail back kind of thing? Even if something of lesser value is normally used? Would it ever hurt anything?
            -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA

              #26
              Re: Emerson LE220EM3 fuse problem.

              https://www.badcaps.net/forum/showpo...2&postcount=65

              Just find the PANASONIC P/N for the dimension, Voltage, and capacitance of the capacitor you need then type in the P/N into DIGIKEY search box.
              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

              • Spork Schivago
                Badcaps Legend
                • Mar 2012
                • 4734
                • United States of America

                #27
                Re: Emerson LE220EM3 fuse problem.

                Thanks Budm! So it doesn't matter for that PSU power supply if they're FM series or not? Just any Panasonic, so long as the physical dimensions, voltage and capacitance is the same? I know it must get old with me asking all these dumb questions. I'm learning though and hopefully sooner or later I'll be helping to answer the questions instead of always asking them!
                -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full

                Comment

                • budm
                  Badcaps Legend
                  • Feb 2010
                  • 40746
                  • USA

                  #28
                  Re: Emerson LE220EM3 fuse problem.

                  It is switching supply (Emerson LE220EM3) so LOW ESR, 105c rating should be used.
                  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

                  • Spork Schivago
                    Badcaps Legend
                    • Mar 2012
                    • 4734
                    • United States of America

                    #29
                    Re: Emerson LE220EM3 fuse problem.

                    Oh no, I don't mean the Emerson PSU. I mean the Bestec. I assume the same is true for that though. Thanks.
                    -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #30
                      Re: Emerson LE220EM3 fuse problem.

                      Originally posted by Spork Schivago
                      Oh no, I don't mean the Emerson PSU. I mean the Bestec. I assume the same is true for that though. Thanks.
                      99.9999% to be SMPS type. Linear power supply will have big iron core transformers.
                      Last edited by budm; 05-22-2015, 11:19 AM.
                      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

                      • Spork Schivago
                        Badcaps Legend
                        • Mar 2012
                        • 4734
                        • United States of America

                        #31
                        Re: Emerson LE220EM3 fuse problem.

                        Thanks for clarifying that for me Budm. For this TV power supply, the Emerson, does this look like a nice replacement for the 200V 100uF cap that's in there already?

                        http://www.digikey.com/product-detai...636-ND/1245965

                        It's got a ripple current of 1.665A. I do believe that means Rated ripple current. The higher, the better, right? It doesn't show what the ESR is though. Although it's a little bit bigger, the lead spacing is the same and I got enough room to make it fit...
                        -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full

                        Comment

                        • Caleb
                          Smokin IC's
                          • Feb 2013
                          • 645
                          • USA

                          #32
                          Re: Emerson LE220EM3 fuse problem.

                          Is this replacing the main filter cap after the diode bridge? If so that should work fine, that filter cap typically sees only 60hz. The low ESR caps are required on the secondary side of the output as they see much higher frequency and the build up of heat from internal resistance would kill a general purpose cap within a short time period. As to your other question when it comes to switch mode power supplies you can generally substitute a low ESR cap for any cap without issue. Most issues arise when a general purpose cap is placed where a low ESR cap needed to be, sometimes they can explode on first power up but most will just fizzle within a week or two.
                          Liberating magic smoke one part at a time

                          Comment

                          • Spork Schivago
                            Badcaps Legend
                            • Mar 2012
                            • 4734
                            • United States of America

                            #33
                            Re: Emerson LE220EM3 fuse problem.

                            It's the only big cap on the board Caleb. If the big caps are normally the main filter cap, then I'd say this is probably the main filter cap. I tried finding the datasheet for it and it doesn't appear to be special in anyway at all (the one that's on there). It just seems to be a generic run-of-the-mill capacitor. There are 4 diodes real close to this capacitor. Is that the diode bridge? If so, then according to the schematics, unless I'm reading them wrong, this capacitor is after the diode bridge. Doesn't that array of diodes have something to do with converting the electricity from AC to DC?
                            -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full

                            Comment

                            • Spork Schivago
                              Badcaps Legend
                              • Mar 2012
                              • 4734
                              • United States of America

                              #34
                              Re: Emerson LE220EM3 fuse problem.

                              Also, there would be no benefits from using a more expensive LOW ESR cap in place of a general purpose cap would there? I know I can't go the other way around, like you said, but if I can use a low ESR cap instead of a general purpose cap, would I see any benefits from doing that? Or would I just be wasting my money?
                              -- Law of Expanding Memory: Applications Will Also Expand Until RAM Is Full

                              Comment

                              • Caleb
                                Smokin IC's
                                • Feb 2013
                                • 645
                                • USA

                                #35
                                Re: Emerson LE220EM3 fuse problem.

                                I just fixed a magnavox version of this set a couple days ago, mine fortunately didn't get multiple fuses and I was able to fix with the standard set of 6 parts.

                                The electricity comes into the power board as 120v ac one side goes through the fuse and then converted to dc by the diode bridge the primary cap is directly after the diode bridge and will typically have 169v dc, this is then connected through the primary transformer to the fet. The fet then switches on and off inducing current into the secondary side of the transformer which is then turned back into dc by the schottky diodes on the secondary side and then connected to the secondary filter caps. There is a line silk screened on the power board designating primary and secondary (or hot and cold).

                                Caps in the primary can be lower standard than in the secondary but should still be 105c. Usually there isnt much cost difference between the two so if in doubt go for low esr it may end up costing you a buck or two but thats not much for peace of mind.
                                Liberating magic smoke one part at a time

                                Comment

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