Sharp LC-52D85U Won't turn on

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  • birdboy385
    Senior Member
    • Nov 2015
    • 145
    • United States

    #21
    Re: Sharp LC-52D85U Won't turn on

    I took indiviual pictures of each Inverter board and the PSU board then a pic of the whole back.
    Attached Files

    Comment

    • birdboy385
      Senior Member
      • Nov 2015
      • 145
      • United States

      #22
      Re: Sharp LC-52D85U Won't turn on

      hmm something else i noticed. I watched a video on shopjimmy which showcasesan lc-32 with simillar problem. However when he goes through a hardreset, you'll briefly see the menu and channel indicator, I don't get any picture when attempting a hard reset, I'm wondering if there is more to this issue than just a potential backlight problem.

      Comment

      • birdboy385
        Senior Member
        • Nov 2015
        • 145
        • United States

        #23
        Re: Sharp LC-52D85U Won't turn on

        any thoughts from anyone? Like i'm actually wondering if there;s an issue with the mainboard not showing video and if there is that issue could that be causing my error code altogether.

        Comment

        • birdboy385
          Senior Member
          • Nov 2015
          • 145
          • United States

          #24
          Re: Sharp LC-52D85U Won't turn on

          i feel like there's probably a way to override the diagnostic mode as i mentioned in the other post but not sure how i'd do it since it was technically a different tv

          Comment

          • martino
            Not so "senior"
            • Aug 2013
            • 997
            • canada

            #25
            Re: Sharp LC-52D85U Won't turn on

            I would start by measuring the secondaries on the inverter coils. write them down and compare values between all of them.
            Proud owner of dozens of broken TV's and many,many,many boards.


            Our website and passion:http://hollenhundshepherds.com/

            Comment

            • birdboy385
              Senior Member
              • Nov 2015
              • 145
              • United States

              #26
              Re: Sharp LC-52D85U Won't turn on

              sorry for the late response. Um my knowledge of measuring this sort of thing is very minimal. forgive my inexperience but no idea what that means lol.

              Comment

              • drkthundr
                Member
                • Feb 2016
                • 45
                • United States

                #27
                Re: Sharp LC-52D85U Won't turn on

                Wrong post
                Last edited by drkthundr; 03-19-2016, 10:50 PM.

                Comment

                • birdboy385
                  Senior Member
                  • Nov 2015
                  • 145
                  • United States

                  #28
                  Re: Sharp LC-52D85U Won't turn on

                  Ok so this is the video i was referencing

                  https://www.youtube.com/watch?v=iIfdf0ut4Po

                  it shows the bridging of a cap to disable the error detection. I was wondering if the same method could be applied to this tv so that It would run "normally" so i could at least properly troubleshoot. With the error detection taking over, I can't get anywhere with it.

                  Comment

                  • martino
                    Not so "senior"
                    • Aug 2013
                    • 997
                    • canada

                    #29
                    Re: Sharp LC-52D85U Won't turn on

                    Originally posted by birdboy385
                    sorry for the late response. Um my knowledge of measuring this sort of thing is very minimal. forgive my inexperience but no idea what that means lol.
                    Look at picture,I circled the legs of the coil which you need to check resistance between.
                    Write down the resistance from all coils,they should be within 10% of each other.

                    btw,parts are cheap for this tv.:
                    http://www.shopjimmy.com/catalogsear...harp+LC-52D85U
                    Attached Files
                    Proud owner of dozens of broken TV's and many,many,many boards.


                    Our website and passion:http://hollenhundshepherds.com/

                    Comment

                    • birdboy385
                      Senior Member
                      • Nov 2015
                      • 145
                      • United States

                      #30
                      Re: Sharp LC-52D85U Won't turn on

                      My inverter boards are different than that. not sure where you're actually ahving me check to map to my own board.

                      Comment

                      • birdboy385
                        Senior Member
                        • Nov 2015
                        • 145
                        • United States

                        #31
                        Re: Sharp LC-52D85U Won't turn on

                        here's what mine look like
                        Attached Files

                        Comment

                        • birdboy385
                          Senior Member
                          • Nov 2015
                          • 145
                          • United States

                          #32
                          Re: Sharp LC-52D85U Won't turn on

                          Yeah i really don't know how to translate the board you showed with mine.

                          Comment

                          • dick_barton
                            Badcaps Legend
                            • Aug 2015
                            • 6642
                            • Wales

                            #33
                            Re: Sharp LC-52D85U Won't turn on

                            Can you post a picture of the reverse side of the board in post #31
                            Willing to help but I'm no expert.

                            Comment

                            • birdboy385
                              Senior Member
                              • Nov 2015
                              • 145
                              • United States

                              #34
                              Re: Sharp LC-52D85U Won't turn on

                              Originally posted by dick_barton
                              Can you post a picture of the reverse side of the board in post #31
                              both boards are shown in the original post. showing the other angle.

                              Comment

                              • birdboy385
                                Senior Member
                                • Nov 2015
                                • 145
                                • United States

                                #35
                                Re: Sharp LC-52D85U Won't turn on

                                anything else you need?

                                Comment

                                • dick_barton
                                  Badcaps Legend
                                  • Aug 2015
                                  • 6642
                                  • Wales

                                  #36
                                  Re: Sharp LC-52D85U Won't turn on

                                  Can you measure all your inverter transformers and see that they all match.
                                  Attached Files
                                  Willing to help but I'm no expert.

                                  Comment

                                  • birdboy385
                                    Senior Member
                                    • Nov 2015
                                    • 145
                                    • United States

                                    #37
                                    Re: Sharp LC-52D85U Won't turn on

                                    i'm not getting any reading when measuring those legs. i have my multimeter set to 500v Since i read the reading should be over 1KV IDK if my multimeter just idn't powerful enough to read thjat

                                    Comment

                                    • budm
                                      Badcaps Legend
                                      • Feb 2010
                                      • 40746
                                      • USA

                                      #38
                                      Re: Sharp LC-52D85U Won't turn on

                                      The picture of the transformer pins are on the BOTTOM view so you have to look at it from top view perspective which will be opposite.
                                      ' i have my multimeter set to 500v'
                                      BTW, we are reading resistance not Voltage!
                                      NO POWER to the unit.
                                      Last edited by budm; 04-29-2016, 03:36 PM.
                                      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

                                      • vinceroger69
                                        Badcaps Legend
                                        • Mar 2012
                                        • 6714
                                        • uk

                                        #39
                                        Re: Sharp LC-52D85U Won't turn on

                                        Originally posted by birdboy385
                                        i'm not getting any reading when measuring those legs. i have my multimeter set to 500v Since i read the reading should be over 1KV IDK if my multimeter just idn't powerful enough to read thjat
                                        These need to be measured in ohms resitance Not dc volts so leave the tv unplugged and take the readings so we can see if you have any issues.
                                        Last edited by vinceroger69; 04-29-2016, 03:39 PM. Reason: budm beat me to my reply

                                        Comment

                                        • birdboy385
                                          Senior Member
                                          • Nov 2015
                                          • 145
                                          • United States

                                          #40
                                          Re: Sharp LC-52D85U Won't turn on

                                          lol i realized as soon as i posted that i'm like...wow i has the dumb today.These are the readings that im getting

                                          800
                                          800
                                          763
                                          768
                                          768
                                          768
                                          770
                                          Can't get a reading from the 8th one
                                          775
                                          765
                                          775
                                          775
                                          So probably safe to say that (i beleive that's the master board that has 12 transformers and the slave has 10) there is one bad transformer on the master. i'm going to read the slave now and report back

                                          Comment

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