What component ?

[eccerr0r]

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.

[stj]

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

[bianchi77]

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...

[budm]

Re: What component ?

You are not going to find lytics cap on these HD PCB. The TVS Diodes show 0 OHMS?

[bianchi77]

Re: What component ?

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

[keeney123]

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?

[bianchi77]

Re: What component ?

[QUOTE=keeney123;694665]

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 ?

[keeney123]

Re: What component ?

[QUOTE=bianchi77;694701]

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.

[budm]

Re: What component ?

BTW, where is the pictures of the whole board?

[bianchi77]

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 ?

[keeney123]

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 ?

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.

[stj]

Re: What component ?

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

[bianchi77]

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. 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 ...

[bianchi77]

Re: What component ?

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...

[stj]

Re: What component ?

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

[bianchi77]

Re: What component ?

Some photos :

[bianchi77]

Re: What component ?

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 ?

[bianchi77]

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 ?

[budm]

Re: What component ?

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?

[stj]

Re: What component ?

how can I know if it's burned ? Open line ?

check the resistance across it - it should be - 0 ohms.