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LG 50PK550 clicking - plasma newbie

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    #21
    Re: LG 50PK550 clicking - plasma newbie

    Originally posted by steviewonder View Post
    Well,the only other thing i can think of there now is failure of IC301,In view the 10 ohm resistors are fine (the most common failure to cause this issue),Also check the diode nearby,it's connected in parallel with a very low ohm resistor-measuring in-circuit may look like it's shorted-remove and check the diode,the board reference escapes me on that one,but you will spot it.
    How do I test IC301? I assume that IC301 is the black item screwed in to the side? Also, is the diode you're referencing in removing to test the pink one with the multi-colored rings in the pic below?
    Attached Files

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      #22
      Re: LG 50PK550 clicking - plasma newbie

      the diode to test is next to the pink resistor,immediate left of the large capacitor.Only real way of checking ic301 is by replacement.Very cheap,however.The diode is most likely ok though,but still worth a go.

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        #23
        Re: LG 50PK550 clicking - plasma newbie

        Originally posted by steviewonder View Post
        the diode to test is next to the pink resistor,immediate left of the large capacitor.Only real way of checking ic301 is by replacement.Very cheap,however.The diode is most likely ok though,but still worth a go.
        Have a replacement IC301 on the way. I removed the diode and testing with Diode mode I get 210 with the neg to neg and pos to pos. When I reverse the pos/neg leads on the diode I get nothing. Does that mean the diode is open/bad and should be replaced??
        Last edited by jason424; 12-23-2016, 10:53 AM.

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          #24
          Re: LG 50PK550 clicking - plasma newbie

          Replaced the IC301 and the diode and now I don't get anything at all when plugging it in and pressing the power on. No green light flashing on the board below it any longer either.

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            #25
            Re: LG 50PK550 clicking - plasma newbie

            The diode was fine,with those readings.Have a very close look at the connections to the new IC301,it's possible you have damaged one of the copper tracks leading away from it!

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              #26
              Re: LG 50PK550 clicking - plasma newbie

              Originally posted by steviewonder View Post
              The diode was fine,with those readings.Have a very close look at the connections to the new IC301,it's possible you have damaged one of the copper tracks leading away from it!
              I assume I damaged something there. I removed the solder and looked and resoldered but not really knowing much about printed boards I'm not sure what damage to look for. I'm sure I fumbled up something replacing that IC301.
              Looks like a replacement EAX61392501/8 board is hard to come by.

              Comment

                #27
                Re: LG 50PK550 clicking - plasma newbie

                Replace the green cap on the power board will probably fix you issue
                Have had 3 of these boards and this fixed all three

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                  #28
                  Re: LG 50PK550 clicking - plasma newbie

                  Originally posted by jason424 View Post
                  I assume I damaged something there. I removed the solder and looked and resoldered but not really knowing much about printed boards I'm not sure what damage to look for. I'm sure I fumbled up something replacing that IC301.
                  Looks like a replacement EAX61392501/8 board is hard to come by.
                  If you can post a picture of the soldered side of IC301 perhaps someone can spot any error.
                  Willing to help but I'm no expert.

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                    #29
                    Re: LG 50PK550 clicking - plasma newbie

                    dont rule out your new part/ic being a fake to if brought from ebay? but as above post a good clear picture we will see if we can spot anything one of the top of the board and one of the underside of the ic

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                      #30
                      Re: LG 50PK550 clicking - plasma newbie

                      Originally posted by dick_barton View Post
                      If you can post a picture of the soldered side of IC301 perhaps someone can spot any error.
                      Here is the soldered side of IC301. Thank you!
                      Attached Files

                      Comment

                        #31
                        Re: LG 50PK550 clicking - plasma newbie

                        I did get it off of eBay http://www.ebay.com/itm/142110554024 . I do have 5 ordered from China, but this one was in the US so I grabbed this one later since it would be here sooner.
                        Attached Files
                        Last edited by jason424; 12-28-2016, 09:12 AM.

                        Comment

                          #32
                          Re: LG 50PK550 clicking - plasma newbie

                          this ic does seem to be a common issue on these sets this video is from a member on this site
                          https://www.youtube.com/watch?v=I9wF...st=HL134884624

                          maybe try to find a data sheet for the ic and test the voltages

                          Comment

                            #33
                            Re: LG 50PK550 clicking - plasma newbie

                            Originally posted by vinceroger69 View Post
                            this ic does seem to be a common issue on these sets this video is from a member on this site
                            https://www.youtube.com/watch?v=I9wF...st=HL134884624

                            maybe try to find a data sheet for the ic and test the voltages
                            I saw that video too and was hoping after replacing the controller and diode, and testing the fuse he pointed out it would resolve. I did find the data sheet, but honestly it's way over my head to comprehend. If I post it here can someone possibly "dumb-down" it for me please?

                            Comment

                              #34
                              Re: LG 50PK550 clicking - plasma newbie

                              yes post the link im sure one of us can advise on testing voltages etc seems odd you have nothing at all when pluging it in now have you double checked all the connectors/wires etc are back on the correct sockets etc as easy to miss one sometimes

                              Comment

                                #35
                                Re: LG 50PK550 clicking - plasma newbie

                                Originally posted by vinceroger69 View Post
                                yes post the link im sure one of us can advise on testing voltages etc seems odd you have nothing at all when pluging it in now have you double checked all the connectors/wires etc are back on the correct sockets etc as easy to miss one sometimes
                                I thought it was odd too. I even tested my outlet I was plugging my cord into! Here is the link. I'm going to go install the board and triple check all connections again. Thank you!
                                ICE3BR1565 datasheet

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                                  #36
                                  Re: LG 50PK550 clicking - plasma newbie

                                  Do I try to remove the "new" IC301 with the original and see if the clicking returns? Thus ruling out whether that was a bad part?

                                  Comment

                                    #37
                                    Re: LG 50PK550 clicking - plasma newbie

                                    Is that a slither of solder across those two pins or just the reflection?
                                    Attached Files
                                    Willing to help but I'm no expert.

                                    Comment

                                      #38
                                      Re: LG 50PK550 clicking - plasma newbie

                                      Originally posted by dick_barton View Post
                                      Is that a slither of solder across those two pins or just the reflection?
                                      I think just a reflection in that pic.
                                      Attached Files

                                      Comment

                                        #39
                                        Re: LG 50PK550 clicking - plasma newbie

                                        I suspect the problem is still with one of the 3 ceramic resistors
                                        I dont think the OP has tested these correctly

                                        Comment

                                          #40
                                          Re: LG 50PK550 clicking - plasma newbie

                                          Originally posted by chrismurphy View Post
                                          I suspect the problem is still with one of the 3 ceramic resistors
                                          I dont think the OP has tested these correctly
                                          Can you please explain how to correctly test the 3 ceramic resistors?

                                          Comment

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