Sharp aquos LC-40LE810E

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #61
    Re: Sharp aquos LC-40LE810E

    "Tried that magic trick with resistor again, but this time tv didn't turned on. Not even led. Just red led on mainboard. " I am a little bit confused here, the first time you did not use any resistor between the AC-DET wire ("I took out pin 9 - AC-DET an just plugged it next to pin 11 - 5v. Without any soldering") and the STBY5V, you had it connected directly without the resistor, and now you are using the 330~1K resistor between the 5V and the AC-DET but the TV will not work this time, is that correct?
    BTW, what is the P/N of that opto for the AC-DET?
    What DCV do you get between pin 1 and pin 2 (the LED side), and between pin 3 and pin 4 (the photo-transistor side)? Notes: The measurement is for between the legs, not with ref to the circuit GND.
    Last edited by budm; 10-13-2015, 06:51 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

    • Nightmare0
      Member
      • Oct 2015
      • 39
      • Slovakia

      #62
      Re: Sharp aquos LC-40LE810E

      Sorry I confused you. First time that trick was working I used 570ohm resistor. I just plugged resistor next to pin 11 and other end of resistor to pin 9. I never tried that without resistor. Just after opto change that resistor trick didn't worked again. Same as I put original optos back.

      That voltages from pin 3 and 4 I got to GND. Voltage of PC7703 between pin 1 and 2 is 0,99V and between 3 and 4 is 2,56V (this voltage goes to 0,08v after tv starts to show error code)

      Comment

      • Nightmare0
        Member
        • Oct 2015
        • 39
        • Slovakia

        #63
        Re: Sharp aquos LC-40LE810E

        On opto there is:
        Cosmo
        1010
        817
        K20

        These are original. I measured pins between 1 - 2 and 3 - 4 like in this photo. Is it correct? I found pin numbers like that on google.
        Attached Files

        Comment

        • rievax_60
          Badcaps Veteran
          • May 2012
          • 897
          • australia

          #64
          Re: Sharp aquos LC-40LE810E

          Is that after you added the 68K?. You didnt say. At 2.5v on pin 3 of PC7703, you might see some voltage on the AC-DET but the TV will not start unless AC-DET is solid high level, no pulses.
          Last edited by rievax_60; 10-13-2015, 09:10 PM. Reason: correct mistake

          Comment

          • rievax_60
            Badcaps Veteran
            • May 2012
            • 897
            • australia

            #65
            Re: Sharp aquos LC-40LE810E

            If pin 3 doesnt go over 3 volts after the 68k is added, then replace PC7703. BTW opto couplers dont like being heated for too long.

            Comment

            • Nightmare0
              Member
              • Oct 2015
              • 39
              • Slovakia

              #66
              Re: Sharp aquos LC-40LE810E

              I just added 68k resistor. I forgot to take a photo. Now between 3 and 4 opto leg I am getting 3,06V
              Tv didn't started. On AC-DET pin 9 I am still not getting any voltage.

              Comment

              • Nightmare0
                Member
                • Oct 2015
                • 39
                • Slovakia

                #67
                Re: Sharp aquos LC-40LE810E

                Leg 3 to gnd is showing 1.68V. Tomorrow i will buy 10 more optos and change all of them again

                Comment

                • rievax_60
                  Badcaps Veteran
                  • May 2012
                  • 897
                  • australia

                  #68
                  Re: Sharp aquos LC-40LE810E

                  So you now have 2v on pin 3 to ground? same as before? It should have made a large difference.
                  Where did you put the 68k? Look at post 279, https://www.badcaps.net/forum/showth...AC-DET&page=14

                  Comment

                  • Nightmare0
                    Member
                    • Oct 2015
                    • 39
                    • Slovakia

                    #69
                    Re: Sharp aquos LC-40LE810E

                    I put it on R7019
                    In that post he is saying R2019 but its typo. If you check photo he really soldered it to R7019
                    Please check that photo I added in post 63, if I am measuring in correct way.
                    Leg 3 of PC7703 with 68k resistor soldered on top of existing resistor according my photo to gnd I got 1.68v

                    Comment

                    • budm
                      Badcaps Legend
                      • Feb 2010
                      • 40746
                      • USA

                      #70
                      Re: Sharp aquos LC-40LE810E

                      What DCV do you have between the two VCC pins as I marked?
                      Attached Files
                      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

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #71
                        Re: Sharp aquos LC-40LE810E

                        I will explain to you later as to why the VDC measured between pin 3 and pin 4 of the opto goes down when you add 68K resistor on the LED drive side. If you look at my picture on post 70 you will understand why.
                        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

                        • rievax_60
                          Badcaps Veteran
                          • May 2012
                          • 897
                          • australia

                          #72
                          Re: Sharp aquos LC-40LE810E

                          everything in post 63 looks correct.

                          Comment

                          • Nightmare0
                            Member
                            • Oct 2015
                            • 39
                            • Slovakia

                            #73
                            Re: Sharp aquos LC-40LE810E

                            You want ne to measure voltage between marks + and - vcc1? It will take me some time,.since its back side of pcb and I am putting it back to tv every time. I have to figure out. Just tell me if to measure between these +- pads. I will solder some wires and.measure

                            Comment

                            • Nightmare0
                              Member
                              • Oct 2015
                              • 39
                              • Slovakia

                              #74
                              Re: Sharp aquos LC-40LE810E

                              Omg.... I am tired and retarded..... I really soldered that resistor on top of.wrong resistor. f-ck, sorry for your time.... Going to fix that....

                              Comment

                              • budm
                                Badcaps Legend
                                • Feb 2010
                                • 40746
                                • USA

                                #75
                                Re: Sharp aquos LC-40LE810E

                                BTW, PD-9 (AC-DET pin) is not driven directly by the OPTO.
                                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

                                • budm
                                  Badcaps Legend
                                  • Feb 2010
                                  • 40746
                                  • USA

                                  #76
                                  Re: Sharp aquos LC-40LE810E

                                  Any, even we are not getting the correct AC-DET signal regardless, you still should be able to fool the main board using the resistor to pull AC-DET high, you did pull the AC-DET wire off the PD female connector when you use the resistor the second time but the TV will still not start, right?
                                  To me that is a bigger problem if you cannot get it to work as before.
                                  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

                                  • budm
                                    Badcaps Legend
                                    • Feb 2010
                                    • 40746
                                    • USA

                                    #77
                                    Re: Sharp aquos LC-40LE810E

                                    Ooops, double post.
                                    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

                                    • Nightmare0
                                      Member
                                      • Oct 2015
                                      • 39
                                      • Slovakia

                                      #78
                                      Re: Sharp aquos LC-40LE810E

                                      Budm, you are right. It worked only once.
                                      So again sorry for your time while I soldered resistor to.wrong place. That's what you will get when you solder at 6 am.
                                      So now...... Again, one more time .
                                      This time I soldered 68k resistor on right place.... Put everything back. Tv is working. Now it's time for measuring. Tell me what do you want to measure. Is this resistor final fix? Or should I buy something?

                                      Comment

                                      • Nightmare0
                                        Member
                                        • Oct 2015
                                        • 39
                                        • Slovakia

                                        #79
                                        Re: Sharp aquos LC-40LE810E

                                        Photos of 68k resistor fix
                                        Also found out, that that red led (D3301) on mainboard is still flashing while tv is on.
                                        Attached Files
                                        Last edited by Nightmare0; 10-13-2015, 10:33 PM.

                                        Comment

                                        • budm
                                          Badcaps Legend
                                          • Feb 2010
                                          • 40746
                                          • USA

                                          #80
                                          Re: Sharp aquos LC-40LE810E

                                          Originally posted by Nightmare0
                                          Budm, you are right. It worked only once.
                                          So again sorry for your time while I soldered resistor to.wrong place. That's what you will get when you solder at 6 am.
                                          So now...... Again, one more time .
                                          This time I soldered 68k resistor on right place.... Put everything back. Tv is working. Now it's time for measuring. Tell me what do you want to measure. Is this resistor final fix? Or should I buy something?
                                          So what DCV measured between pin 3 and pin 4 now (do not use GN for ref point)? You still should have about 1VDC between pin 1 and pin 2.
                                          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

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