What component ?

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  • eccerr0r
    Solder Sloth
    • Nov 2012
    • 8694
    • USA

    #21
    Re: What component ?

    The failure of the shock sensor probably would not cause the drive to fail, or at least it shouldn't. From the fact that crystals should be pretty quiet when not struck, it should look like an open circuit (or a few Kohms). However it may be used to detect vibration of the disk and compensate for it...

    Piezoelectric crystals tend to be very reliable and I wouldn't suspect it broken unless physically destroyed.
    Last edited by eccerr0r; 10-09-2016, 07:08 PM.

    Comment

    • stj
      Great Sage 齊天大聖
      • Dec 2009
      • 30977
      • Albion

      #22
      Re: What component ?

      if the cover is brown and says "Turuta" then yes.


      look at his thread
      https://www.badcaps.net/forum/showthread.php?p=507366

      Comment

      • bianchi77
        Badcaps Legend
        • Jun 2016
        • 1121
        • Australia

        #23
        Re: What component ?

        I can't find any electrolityc capacitors on 5V rails...so it will not be the faulty caps...
        but 2 TVS diodes are on 5V rails which was hit by 12V accidentally....

        Thanks for the link...

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #24
          Re: What component ?

          You are not going to find lytics cap on these HD PCB. The TVS Diodes show 0 OHMS?
          Last edited by budm; 10-09-2016, 08:14 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

          • bianchi77
            Badcaps Legend
            • Jun 2016
            • 1121
            • Australia

            #25
            Re: What component ?

            TVS diodes are showing a value for forward and reverse test...on board..10K analog multimeter..

            Comment

            • keeney123
              Lauren
              • Sep 2014
              • 2536
              • United States

              #26
              Re: What component ?

              [QUOTE=bianchi77;694427]Everyone,

              What component is that ?
              I see it near inductor on 320Gb HDD board from Seagate
              Is it blown capacitor or TVS diode ?

              Cheers[/QUOTE


              So I agree with eccerr0r this is shock sensor for the hard drive. It has a max rating of 10 V p-p from A to B. It has all the markings of a shock sensor and not the markings of the smc 2pin component. If this is still what you are talking about?

              Comment

              • bianchi77
                Badcaps Legend
                • Jun 2016
                • 1121
                • Australia

                #27
                Re: What component ?

                [QUOTE=keeney123;694665]
                Originally posted by bianchi77
                Everyone,

                What component is that ?
                I see it near inductor on 320Gb HDD board from Seagate
                Is it blown capacitor or TVS diode ?

                Cheers[/QUOTE


                So I agree with eccerr0r this is shock sensor for the hard drive. It has a max rating of 10 V p-p from A to B. It has all the markings of a shock sensor and not the markings of the smc 2pin component. If this is still what you are talking about?
                How about those TVS s are they faulty already ?

                Comment

                • keeney123
                  Lauren
                  • Sep 2014
                  • 2536
                  • United States

                  #28
                  Re: What component ?

                  [QUOTE=bianchi77;694701]
                  Originally posted by keeney123

                  How about those TVS s are they faulty already ?
                  So your picture from post one show this as a shock sensor. If you look at the links below; the smd codes and murata shock sensor it looks just like the shock sensor. If you are talking about some other component then in post one do you have a picture for that components of the TVS suppression diode? I would need to know the out of circuit measurement, if the TVS is uni or bi directional. With bi you will get diode reading either way. Uni you will get diode reading one way. This would be done on lowest resistance scale on a analog meter or diode setting. You should not have a direct short 1 ohm or less. If the diode is good than the battery of the meter will forward bias the diode on the resistance setting and the reading will deflect the needle significantly above o ohms on the lowest scale setting.
                  Last edited by keeney123; 10-10-2016, 11:13 AM.

                  Comment

                  • budm
                    Badcaps Legend
                    • Feb 2010
                    • 40746
                    • USA

                    #29
                    Re: What component ?

                    BTW, where is the pictures of the whole board?
                    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

                    • bianchi77
                      Badcaps Legend
                      • Jun 2016
                      • 1121
                      • Australia

                      #30
                      Re: What component ?

                      The whole board....not many major components on it...main CPU, RAM, motor controller...
                      Will the CPU die, if there's a voltage spike ?
                      Attached Files

                      Comment

                      • keeney123
                        Lauren
                        • Sep 2014
                        • 2536
                        • United States

                        #31
                        Re: What component ?

                        Originally posted by bianchi77
                        The whole board....not many major components on it...main CPU, RAM, motor controller...
                        Will the CPU die, if there's a voltage spike ?
                        So it looks like the largest IC has traces that are broken on the top of the ic, there is eyelet holes that seem damaged. I can not read any numbers on the IC. It maybe the main CPU. It would also be nice to see the back of the board.
                        Last edited by keeney123; 10-11-2016, 10:46 AM.

                        Comment

                        • stj
                          Great Sage 齊天大聖
                          • Dec 2009
                          • 30977
                          • Albion

                          #32
                          Re: What component ?

                          did you check all those 0-ohm resistors over the power inlet?

                          Comment

                          • bianchi77
                            Badcaps Legend
                            • Jun 2016
                            • 1121
                            • Australia

                            #33
                            Re: What component ?

                            Originally posted by keeney123
                            So it looks like the largest IC has traces that are broken on the top of the ic, there is eyelet holes that seem damaged. I can not read any numbers on the IC. It maybe the main CPU. It would also be nice to see the back of the board.
                            Which one area are you talking about ? could you mark it ?
                            Ok, I'll take photo for the other side ...

                            Comment

                            • bianchi77
                              Badcaps Legend
                              • Jun 2016
                              • 1121
                              • Australia

                              #34
                              Re: What component ?

                              Originally posted by stj
                              did you check all those 0-ohm resistors over the power inlet?
                              Ok, I'll do that,
                              one of the TVS diode is short, showing value on both test reverse and forward...
                              Last edited by bianchi77; 10-11-2016, 05:25 PM.

                              Comment

                              • stj
                                Great Sage 齊天大聖
                                • Dec 2009
                                • 30977
                                • Albion

                                #35
                                Re: What component ?

                                if there is a short, it could burn out those resistors - that's why i'm asking

                                Comment

                                • bianchi77
                                  Badcaps Legend
                                  • Jun 2016
                                  • 1121
                                  • Australia

                                  #36
                                  Re: What component ?

                                  Some photos :
                                  Attached Files

                                  Comment

                                  • bianchi77
                                    Badcaps Legend
                                    • Jun 2016
                                    • 1121
                                    • Australia

                                    #37
                                    Re: What component ?

                                    Originally posted by stj
                                    if there is a short, it could burn out those resistors - that's why i'm asking
                                    how can I know if it's burned ? Open line ?

                                    Comment

                                    • bianchi77
                                      Badcaps Legend
                                      • Jun 2016
                                      • 1121
                                      • Australia

                                      #38
                                      Re: What component ?

                                      So it looks like the largest IC has traces that are broken on the top of the ic, there is eyelet holes that seem damaged.
                                      Have you checked out those photos ?
                                      Please let me know where it is ?

                                      Comment

                                      • budm
                                        Badcaps Legend
                                        • Feb 2010
                                        • 40746
                                        • USA

                                        #39
                                        Re: What component ?

                                        Originally posted by bianchi77
                                        Ok, I'll do that,
                                        one of the TVS diode is short, showing value on both test reverse and forward...
                                        What is the RESISTANCE READING of the TVS off the board?
                                        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

                                        • stj
                                          Great Sage 齊天大聖
                                          • Dec 2009
                                          • 30977
                                          • Albion

                                          #40
                                          Re: What component ?

                                          Originally posted by bianchi77
                                          how can I know if it's burned ? Open line ?
                                          check the resistance across it - it should be - 0 ohms.

                                          Comment

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