Hitachi 50HYT62U no picture

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  • nomoresonys
    Badcaps Legend
    • Jan 2013
    • 12141
    • U.S.

    #21
    Re: Hitachi 50HYT62U no picture

    Put ur meter in ohm mode check and see if any read very low ohms, one probe on each side of cap, doesn't matter which way around.
    Last edited by nomoresonys; 12-13-2019, 02:04 PM.

    Comment

    • Bloopeta
      Badcaps Veteran
      • Jun 2018
      • 526
      • United Kingdom

      #22
      Re: Hitachi 50HYT62U no picture

      Originally posted by nomoresonys
      Put ur meter in ohm mode check and see if any read very low ohms.
      Ill get onto it now any report back, what would be concidered normal readings and what would be concidered very low on these particular boards?

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #23
        Re: Hitachi 50HYT62U no picture

        All you have to do is to test the resistance of the caps, it can also be applied to any kind of boards when troubleshooting the problem.
        Last edited by budm; 12-13-2019, 02:08 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

        • Bloopeta
          Badcaps Veteran
          • Jun 2018
          • 526
          • United Kingdom

          #24
          Re: Hitachi 50HYT62U no picture

          Originally posted by nomoresonys
          Put ur meter in ohm mode check and see if any read very low ohms, one probe on each side of cap, doesn't matter which way around.
          And sorry if this is a silly question, but do I test with power on or off? Or is that irrelevant?

          Comment

          • Bloopeta
            Badcaps Veteran
            • Jun 2018
            • 526
            • United Kingdom

            #25
            Re: Hitachi 50HYT62U no picture

            Originally posted by budm
            All you have to do is to test the resistance of the caps.
            Ah I see, thankyou, I will do it now and report back

            Comment

            • nomoresonys
              Badcaps Legend
              • Jan 2013
              • 12141
              • U.S.

              #26
              Re: Hitachi 50HYT62U no picture

              If you see any that are noticeably lower than the others you will know, last ones I measured were pretty much over 100 on 200 setting.

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #27
                Re: Hitachi 50HYT62U no picture

                Originally posted by Bloopeta
                And sorry if this is a silly question, but do I test with power on or off? Or is that irrelevant?
                Always do resistance check when power is not applied, i.e. unplug the TV or what ever you are working on from any power source.
                BTW. you do know how to replace SMD parts, correct?
                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

                • nomoresonys
                  Badcaps Legend
                  • Jan 2013
                  • 12141
                  • U.S.

                  #28
                  Re: Hitachi 50HYT62U no picture

                  Originally posted by Bloopeta
                  And sorry if this is a silly question, but do I test with power on or off? Or is that irrelevant?
                  Power off.

                  Comment

                  • Bloopeta
                    Badcaps Veteran
                    • Jun 2018
                    • 526
                    • United Kingdom

                    #29
                    Re: Hitachi 50HYT62U no picture

                    So Ive tested all caps on those boards, they were all between 50 and 120

                    Comment

                    • Bloopeta
                      Badcaps Veteran
                      • Jun 2018
                      • 526
                      • United Kingdom

                      #30
                      Re: Hitachi 50HYT62U no picture

                      Originally posted by budm
                      Always do resistance check when power is not applied, i.e. unplug the TV or what ever you are working on from any power source.
                      BTW. you do know how to replace SMD parts, correct?
                      Only SMD parts I have changed so far are backlight LEDs

                      Comment

                      • budm
                        Badcaps Legend
                        • Feb 2010
                        • 40746
                        • USA

                        #31
                        Re: Hitachi 50HYT62U no picture

                        Originally posted by Bloopeta
                        So Ive tested all caps on those boards, they were all between 50 and 120
                        50 Ohms? 50 KOhms, 50 MOhms?
                        What is the Ohm scale set to and what is shown on the display of the meter?
                        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

                        • Bloopeta
                          Badcaps Veteran
                          • Jun 2018
                          • 526
                          • United Kingdom

                          #32
                          Re: Hitachi 50HYT62U no picture

                          Originally posted by budm
                          50 Ohms? 50 KOhms, 50 MOhms?
                          What is the Ohm scale set to and what is shown on the display of the meter?
                          Sorry, I set the meter to 200, and the readings are for example 95.6

                          Comment

                          • budm
                            Badcaps Legend
                            • Feb 2010
                            • 40746
                            • USA

                            #33
                            Re: Hitachi 50HYT62U no picture

                            I do not expect any of those ceramics cap to show <100 Ohms.
                            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

                            • Bloopeta
                              Badcaps Veteran
                              • Jun 2018
                              • 526
                              • United Kingdom

                              #34
                              Re: Hitachi 50HYT62U no picture

                              Originally posted by budm
                              I do not expect any of those ceramics cap to show <100 Ohms.

                              There are quite alot less than 100 Ohms, so what would that indicate?

                              Comment

                              • budm
                                Badcaps Legend
                                • Feb 2010
                                • 40746
                                • USA

                                #35
                                Re: Hitachi 50HYT62U no picture

                                Need to locate Voltage test points on those board and start checking Voltages. Start by looking for 12V input and the fuse.
                                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

                                • Bloopeta
                                  Badcaps Veteran
                                  • Jun 2018
                                  • 526
                                  • United Kingdom

                                  #36
                                  Re: Hitachi 50HYT62U no picture

                                  Originally posted by budm
                                  Need to locate Voltage test points on those board and start checking Voltages. Start by looking for 12V input and the fuse.
                                  I camt seem to locate any test points on the driver boards themselves, nor a fuse??

                                  Thats not to say they arent any, its just everything is that small, and my eyes arent the greatest lol

                                  Comment

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