LG 42PJ550 Click

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  • anotherdude
    Badcaps Veteran
    • Feb 2013
    • 488
    • uk

    #1

    LG 42PJ550 Click

    Tries to turn on with a audible click, standby led shows before it attempts to turn on I get no response from pressing buttons or the remote.

    can hear the click again when i remove the power cable

    reading no vs or va voltages
  • topng
    Senior Member
    • Dec 2013
    • 56
    • ISRAEL

    #2
    Re: LG 42PJ550 Click

    it common problom chack the 5w 22 ohm resistor and 3BR1565JF

    Comment

    • anotherdude
      Badcaps Veteran
      • Feb 2013
      • 488
      • uk

      #3
      Re: LG 42PJ550 Click

      Originally posted by topng
      it common problom chack the 5w 22 ohm resistor and 3BR1565JF
      thanks can see these in a kit on ebay

      just found them seperatly but can't make out the diode on the board

      Comment

      • anotherdude
        Badcaps Veteran
        • Feb 2013
        • 488
        • uk

        #4
        Re: LG 42PJ550 Click

        got the diode out it's a sb140a

        am I correct in this 40v 1a so would these be a suitable replacement

        http://cpc.farnell.com/jsp/search/pr...sp?sku=SC08155

        also i've seen kits with fuses next to the diode but as far as i can tell the fuse is good because i still get a standby light

        sorry to ask here but my searching on cpc doesn't seem to work (or i'm doing it wrong) but could anyone see these parts

        these resistors correct? http://cpc.farnell.com/multicomp/mck...5ws/dp/RE07467

        22ohm 5w resistor
        ICE3BR1565JF
        Last edited by anotherdude; 04-12-2014, 02:27 PM.

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #5
          Re: LG 42PJ550 Click

          Those resistors are wrong format. You sure that diode is 40V for Vsus/Va? They are 200V & 60V rated... it is unlikely that diode is 40V...
          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

          • anotherdude
            Badcaps Veteran
            • Feb 2013
            • 488
            • uk

            #6
            Re: LG 42PJ550 Click

            Originally posted by tom66
            Those resistors are wrong format. You sure that diode is 40V for Vsus/Va? They are 200V & 60V rated... it is unlikely that diode is 40V...
            labelled as sb140a, just from googling it returns 40v 1a

            datasheet http://pdf1.alldatasheet.com/datashe...EC/SB140A.html
            Last edited by anotherdude; 04-12-2014, 02:57 PM.

            Comment

            • tom66
              EVs Rule
              • Apr 2011
              • 32560
              • UK

              #7
              Re: LG 42PJ550 Click

              Could you provide a picture of it's location?
              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

              • anotherdude
                Badcaps Veteran
                • Feb 2013
                • 488
                • uk

                #8
                Re: LG 42PJ550 Click

                Originally posted by tom66
                Could you provide a picture of it's location?
                it's located next to the ICE3BR1565JF

                it's been removed already D304
                Attached Files

                Comment

                • tom66
                  EVs Rule
                  • Apr 2011
                  • 32560
                  • UK

                  #9
                  Re: LG 42PJ550 Click

                  Ah kk, that should be fine, was thinking of another diode.
                  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

                  • anotherdude
                    Badcaps Veteran
                    • Feb 2013
                    • 488
                    • uk

                    #10
                    Re: LG 42PJ550 Click

                    Originally posted by tom66
                    Ah kk, that should be fine, was thinking of another diode.
                    the diodes on cpc are fine yes?

                    sourced the rest on ebay

                    Comment

                    • anotherdude
                      Badcaps Veteran
                      • Feb 2013
                      • 488
                      • uk

                      #11
                      Re: LG 42PJ550 Click

                      so got all the parts, fitted them and still the same.

                      no voltages at all on the ysus or zsus

                      ac_det i'm seeing 4v which is fine from what i can see

                      the 2 large caps going towards the ysus i'm seeing 215v at one and 125v at the lower
                      Last edited by anotherdude; 04-16-2014, 04:37 AM.

                      Comment

                      • anotherdude
                        Badcaps Veteran
                        • Feb 2013
                        • 488
                        • uk

                        #12
                        Re: LG 42PJ550 Click

                        pictures attatched, can see there was another similar issue with the same set a few weeks back
                        Attached Files

                        Comment

                        • tom66
                          EVs Rule
                          • Apr 2011
                          • 32560
                          • UK

                          #13
                          Re: LG 42PJ550 Click

                          215V to Vsus? That's very high....
                          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

                          • anotherdude
                            Badcaps Veteran
                            • Feb 2013
                            • 488
                            • uk

                            #14
                            Re: LG 42PJ550 Click

                            Originally posted by tom66
                            215V to Vsus? That's very high....
                            the far left caps (large ones) on the power supply board, what could that indicate?

                            Comment

                            • tom66
                              EVs Rule
                              • Apr 2011
                              • 32560
                              • UK

                              #15
                              Re: LG 42PJ550 Click

                              Your multimeter battery is good?
                              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

                              • tw2005
                                Badcaps Legend
                                • Oct 2011
                                • 6458
                                • Australia

                                #16
                                Re: LG 42PJ550 Click

                                have you tried running the PSU on its own? If the power cable to the main board is disconnected, the PSU should power up all stages in sequence. I'd disconnect all other boards.

                                Comment

                                • anotherdude
                                  Badcaps Veteran
                                  • Feb 2013
                                  • 488
                                  • uk

                                  #17
                                  Re: LG 42PJ550 Click

                                  Originally posted by tom66
                                  Your multimeter battery is good?
                                  I changed the battery and checked again

                                  chassis as ground I read

                                  215-220v at either cap

                                  measure them off each leg I get 380v on each cap

                                  Comment

                                  • anotherdude
                                    Badcaps Veteran
                                    • Feb 2013
                                    • 488
                                    • uk

                                    #18
                                    Re: LG 42PJ550 Click

                                    Originally posted by tw2005
                                    have you tried running the PSU on its own? If the power cable to the main board is disconnected, the PSU should power up all stages in sequence. I'd disconnect all other boards.
                                    seems your are correct, unplugged the main measured the voltages at the vs etc and there all there and correct

                                    used a resistor on the t-con and got the test pattern too

                                    looking at the mainboard now it's very obvious where the fault is, cracking on a cap

                                    should of tried that from the off, how stupid of me, suppose i know for next time
                                    Last edited by anotherdude; 04-17-2014, 05:23 AM.

                                    Comment

                                    • anotherdude
                                      Badcaps Veteran
                                      • Feb 2013
                                      • 488
                                      • uk

                                      #19
                                      Re: LG 42PJ550 Click

                                      not that visible from the photo but the difference can be seen to the rest of the caps, no swelling but cracking down the sides and the top looks different too

                                      anyone able to help with the values?
                                      Attached Files

                                      Comment

                                      • tom66
                                        EVs Rule
                                        • Apr 2011
                                        • 32560
                                        • UK

                                        #20
                                        Re: LG 42PJ550 Click

                                        That looks fine to me.
                                        Have you jumpered the power supply ON and tried test patterns yet?

                                        215V~220V - what cap? The 450V ones? You need to measure across them.
                                        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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