LG 37LC7D Bad/Bulging Caps

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  • MvZiC MaN
    Member
    • Apr 2017
    • 19
    • United States
    #1

    LG 37LC7D Bad/Bulging Caps

    Apologies if this isnt the correct place for this. This is my first real post here.

    Found myself an LG 37" at the curb today. Did some testing and found it didnt like to turn on all the time.

    Pulled it apart and found 4 or 5 bad Capacitors and im assuming thats the only issue.

    When it doesn't turn on, the green power light flashes 2 or 3 times then flashes red once and repeats. My main question is has anyone come across one of these sets with the same issue? and am i wrong in assuming capacitors are Polarized?

    Heres a few pictures of the Power board. The Bulging/Bad caps as far as i can tell are located at C202,C206,C210 and C217





    Tags: None
    • diif
      Badcaps Legend
      • Feb 2014
      • 6978
      • England
      #2
      Re: LG 37LC7D Bad/Bulging Caps

      I would replace all of the caps apart from the really big mains filter.
      The white side of the caps with the - indicates the negative side. As you can see they line up with a mark on the PCB.

        Comment

        • dskall
          Badcaps Legend
          • Oct 2016
          • 2905
          • usa
          #3
          Re: LG 37LC7D Bad/Bulging Caps

          I think everyone who repairs electronics has come across bad caps
          I assume no responsibility for any stupid suggestions I might post.

            Comment

            • MvZiC MaN
              Member
              • Apr 2017
              • 19
              • United States
              #4
              Re: LG 37LC7D Bad/Bulging Caps

              Originally posted by diif
              I would replace all of the caps apart from the really big mains filter.
              The white side of the caps with the - indicates the negative side. As you can see they line up with a mark on the PCB.
              I plan on replacing them all eventually but id like to replace the individual ones first to Confirm that they are the whole issue..

              How Should i go about locating Individual Capacitors?

              is Ebay a safe place to buy them or do you all have a better source?

              C202,C206 and C217 are all the same parts. (10v 2200uf V0A PET)

              and C210 (35v 1500uf V4A PET)

              Edit: I found these, are they the ones i need?
              http://www.ebay.com/itm/2pcs-1500uf-...EAAOSw-4BXafFc
              and
              http://www.ebay.com/itm/5pcs-2200uF-...1%26rkt%3D1%26
              Last edited by MvZiC MaN; 06-16-2017, 03:37 PM.

                Comment

                • diif
                  Badcaps Legend
                  • Feb 2014
                  • 6978
                  • England
                  #5
                  Re: LG 37LC7D Bad/Bulging Caps

                  I suggest Digikey or Mouser as there are lots of fakes and junk caps on ebay. I use Panasonic FR FM and FC series. Low ESR and good quality.
                  I've learnt to never assume, especially when it comes to electronics but considering the visual deformity of those caps and the fact there is power, it's a fair guess to say replacing them should get the TV powering on again.

                    Comment

                    • dskall
                      Badcaps Legend
                      • Oct 2016
                      • 2905
                      • usa
                      #6
                      Re: LG 37LC7D Bad/Bulging Caps

                      You need low esr for these power supplies. The first link was low esr caps the second was for general purpose and not suitable for smps
                      I assume no responsibility for any stupid suggestions I might post.

                        Comment

                        • MvZiC MaN
                          Member
                          • Apr 2017
                          • 19
                          • United States
                          #7
                          Re: LG 37LC7D Bad/Bulging Caps

                          i have several old Computer power supplies laying around and some other old electronics. Im wondering if i can salvage some caps from them for testing purposes until i can order the whole set of caps for my power board.

                            Comment

                            • MvZiC MaN
                              Member
                              • Apr 2017
                              • 19
                              • United States
                              #8
                              Re: LG 37LC7D Bad/Bulging Caps

                              Originally posted by dskall
                              You need low esr for these power supplies. The first link was low esr caps the second was for general purpose and not suitable for smps
                              Looking on Digikey and im all kinds of Confused! lol Im new to trying to fix tvs and locate these tiny parts. This is only my 2nd tv ive tried to repair.


                              How about these ones?
                              http://www.ebay.com/itm/4x-Nichicon-...rvJfbpZYjBrKVA
                              Last edited by MvZiC MaN; 06-16-2017, 04:33 PM.

                                Comment

                                • culcuhain
                                  Senior Member
                                  • May 2016
                                  • 186
                                  • U$@
                                  #9
                                  Re: LG 37LC7D Bad/Bulging Caps

                                  Caps are cheap. Order new. Do it once and do it right.

                                    Comment

                                    • dskall
                                      Badcaps Legend
                                      • Oct 2016
                                      • 2905
                                      • usa
                                      #10
                                      Re: LG 37LC7D Bad/Bulging Caps

                                      What to look for on power supply caps is low esr, 105c temp, equal or real close capacity uf rating and equal or higher voltage rating
                                      I assume no responsibility for any stupid suggestions I might post.

                                        Comment

                                        • dick_barton
                                          Badcaps Legend
                                          • Aug 2015
                                          • 6642
                                          • Wales
                                          #11
                                          Re: LG 37LC7D Bad/Bulging Caps

                                          Originally posted by culcuhain
                                          Caps are cheap. Order new. Do it once and do it right.
                                          +1 All of us who repair would not think twice of first replacing all the bulged capacitors irrespective of any other faults which may be found afterwards.
                                          You cannot test the speed of the car if the engine is not running. So get the power supply up and running before worrying about any other possible fault. Capacitors are cheap.
                                          Willing to help but I'm no expert.

                                            Comment

                                            • neilc6
                                              Badcaps Legend
                                              • Nov 2015
                                              • 1550
                                              • Canada
                                              #12
                                              Re: LG 37LC7D Bad/Bulging Caps

                                              I have repaired two of these models. One had C202, C206, C210 and C217 bulged and the other had C202, C217 and C221 replaced with wrong values (assuming they were bulged initially). I would recommend replacement of all the following capacitors.

                                              C202, C206, C217, C218 - 2200uF/10V
                                              C208 - 2200uF/25V
                                              C210 - 1500uF/35V (one tv this value was 1000uF/35V and bulged)
                                              C221 - 470uF/10V (can use 35V to simplify ordering)
                                              C222 - 470uF/25V (can use 35V to simplify ordering)
                                              C226 - 470uF/35V

                                              If you order from Digikey, if you limit the search to Rubycon caps, in stock, bulk or cut tape, there will be less options.
                                              Last edited by neilc6; 06-19-2017, 04:14 PM.

                                                Comment

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