Lg 42pc1d

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  • kazzy
    Member
    • May 2013
    • 23
    • Scotland

    #1

    Lg 42pc1d

    Hi all i have got an LG 42PC1D that I have been having problems with for the past year and a half ish, The problem it's self started by the picture being distorted when the TV is first switched on, after a couple of minutes the picture restores it's self to full color. Now last week the TV stopped putting out any picture/really dark. I took the back off the TV and I noticed that 2 caps are swollen on the main power board. any idea's if this would be my problem as I'm a bit of a noob when it comes to TV diagnostics.

    Any help would be greatly appreciated.
    Cheers Greig
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Lg 42pc1d

    It's a good idea to replace the capacitors if they are failed. While they may not cause the current issue, they give you a baseline to work from.

    Can we see a picture of the current fault... and any chance you took a photo of the fault it had previously?
    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

    • kazzy
      Member
      • May 2013
      • 23
      • Scotland

      #3
      Re: Lg 42pc1d

      Unfortunately I didn't take a picture of it previously and I have replaced the capacitors this morning and plugged it all back in to no avail :/ just a black screen

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: Lg 42pc1d

        Really dark, so you can see an image, but it is faint?
        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

        • kazzy
          Member
          • May 2013
          • 23
          • Scotland

          #5
          Re: Lg 42pc1d

          no nothing anymore tried menu and everything but nothing is visible :/

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #6
            Re: Lg 42pc1d

            Do you have a digital multimeter?
            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

            • kazzy
              Member
              • May 2013
              • 23
              • Scotland

              #7
              Re: Lg 42pc1d

              yes a snap on one

              Comment

              • tom66
                EVs Rule
                • Apr 2011
                • 32560
                • UK

                #8
                Re: Lg 42pc1d

                OK, let's see some pictures of the chassis layout then. Long time since I worked on one of these.
                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

                • kazzy
                  Member
                  • May 2013
                  • 23
                  • Scotland

                  #9
                  Re: Lg 42pc1d

                  Comment

                  • tom66
                    EVs Rule
                    • Apr 2011
                    • 32560
                    • UK

                    #10
                    Re: Lg 42pc1d

                    OK, so in the middle of the chassis, you have the power board.

                    On the left, from your photo, you have the Y-sustain and Y-buffer.

                    On the right, you have the Z-sustain.

                    Can you get a close up shot of the power leads going to the Y-sustain from the power supply?
                    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

                    • kazzy
                      Member
                      • May 2013
                      • 23
                      • Scotland

                      #11
                      Re: Lg 42pc1d


                      Power Board side of the cables

                      Comment

                      • tom66
                        EVs Rule
                        • Apr 2011
                        • 32560
                        • UK

                        #12
                        Re: Lg 42pc1d

                        So, get your meter out, set it on the HIGHEST volt DC scale, probe one of the pins marked V-S (red probe on the pin, black probe on the chassis) and report the reading. Note, the connection to the Y-SUS and Z-SUS must be left in place.
                        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

                        • kazzy
                          Member
                          • May 2013
                          • 23
                          • Scotland

                          #13
                          Re: Lg 42pc1d

                          will i plug it in and switch it on?

                          Comment

                          • kazzy
                            Member
                            • May 2013
                            • 23
                            • Scotland

                            #14
                            Re: Lg 42pc1d

                            189V on both terminals with tv powered on

                            Comment

                            • JonathanAnon
                              Badcaps Veteran
                              • Jul 2012
                              • 457
                              • Ireland

                              #15
                              Re: Lg 42pc1d

                              What values are printed on the back of the panel.. ?

                              Comment

                              • tom66
                                EVs Rule
                                • Apr 2011
                                • 32560
                                • UK

                                #16
                                Re: Lg 42pc1d

                                189V is fine for this generation of PDP.
                                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

                                • kazzy
                                  Member
                                  • May 2013
                                  • 23
                                  • Scotland

                                  #17
                                  Re: Lg 42pc1d

                                  any ideas of what I could do now? :/

                                  Comment

                                  • tom66
                                    EVs Rule
                                    • Apr 2011
                                    • 32560
                                    • UK

                                    #18
                                    Re: Lg 42pc1d

                                    You have two fuses on each board, right? See what voltage you get on each end of each fuse.
                                    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

                                    • kazzy
                                      Member
                                      • May 2013
                                      • 23
                                      • Scotland

                                      #19
                                      Re: Lg 42pc1d

                                      one fuse on each board reads 190V the other reads 60v on each board.

                                      Comment

                                      • tom66
                                        EVs Rule
                                        • Apr 2011
                                        • 32560
                                        • UK

                                        #20
                                        Re: Lg 42pc1d

                                        Both ends?
                                        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

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