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 Post subject: Samsung HD103SI burnt PCB
PostPosted: December 17th, 2013, 7:37 
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Joined: August 3rd, 2012, 7:47
Posts: 394
Location: slovenija
Hello,

I receive Samsung HD103SI. Drive doesent spin.
I check PCB and I found that one selectde element is broken.
Is thic common problem for this drive?
Picture is not from this drive


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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: December 17th, 2013, 8:01 
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Joined: November 29th, 2006, 10:08
Posts: 7843
Location: UK
TVS Diode. Search this forum for it. :-)

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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: December 17th, 2013, 8:28 
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Joined: September 8th, 2009, 18:21
Posts: 15440
Location: Australia
If the 12V TVS diode were shorted, then it should shut down the PSU.

See http://www.users.on.net/~fzabkar/HDD/TVS_diode_FAQ.html

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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: December 17th, 2013, 16:42 
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Joined: August 3rd, 2012, 7:47
Posts: 394
Location: slovenija
Hello,

thank you Mr. Zabkar and PCimage for replay.
It's hard to read. PCB photo attach. How to identify right model?


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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: December 17th, 2013, 22:12 
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Joined: July 2nd, 2011, 14:16
Posts: 453
Location: England
looks like the drive sustained an over voltage and the Black diode might have done its job. Snip the broken black thing off and your drive should work again. If not, then the fuse could have gone and you will need to do more work on it.


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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: December 19th, 2013, 3:38 
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Joined: August 3rd, 2012, 7:47
Posts: 394
Location: slovenija
Hello ShaneWard,

thank you for your suggestion. I unsolder diode and drive spin up and I was able to recover all data.
Just one more question. How to identify type of diode to replace it eith new one?


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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: December 19th, 2013, 5:06 
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Joined: September 8th, 2009, 18:21
Posts: 15440
Location: Australia
Just replace it with an SMBJ12A. My FAQ tells you where to buy one. Alternatively, just use a 12V TVS diode from any other board.

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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: February 12th, 2015, 7:37 
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Joined: February 12th, 2015, 7:26
Posts: 2
Location: Italy
Hi everybody,
sorry to resume this old post.
However, I have similar troubles (used the wrong power supply on the same HDD within an external LACIE device).

I noticed the same TVS 12V being a little bit "burned".
Before I do anything, should I simply remove this diode or should I remove it and then connect the edges creating a sort of bridge?
Sorry I am really a newbie and also my terminology can be inexact.

Thank you in advance.
R


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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: February 12th, 2015, 9:16 
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Joined: August 3rd, 2012, 7:47
Posts: 394
Location: slovenija
hello,

you can remove tvs.
Otherwise you can post picture of PCB here, before you remove TVS.


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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: February 12th, 2015, 12:37 
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Joined: February 12th, 2015, 7:26
Posts: 2
Location: Italy
Ok,

I found out myself.
I just removed the TVS diode and the Hard Disk works beautifully.
I need to really thank the authors of the posts here.
They saved me a lot of $
R.


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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: February 12th, 2015, 17:16 
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Joined: July 2nd, 2011, 14:16
Posts: 453
Location: England
Just remember that your drive does not have that protection any more, so if you use the wrong power supply you will blow up your hard drive for good!...

Be careful and backup your stuff.

Shane


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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: February 12th, 2015, 18:04 
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Joined: August 13th, 2008, 13:10
Posts: 809
Location: World
Hi ShaneWard!

The best in this case is to backup all your data, because if you have any power problem you will lost your data, because you have not power portection.

If you have power problems PCB or Heads amplificator or other electronics must burn, and data recovery will be harder.


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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: February 13th, 2015, 2:12 
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Joined: August 15th, 2006, 3:01
Posts: 3459
Location: CDRLabs @ Chandigarh [ India ]
fzabkar wrote:
Just replace it with an SMBJ12A. My FAQ tells you where to buy one. Alternatively, just use a 12V TVS diode from any other board.


Sir ,
you Should Read Franks FAQ Its Nice .BTW Frank What Once Do You Recommend To Keep At Hand In Bulk Quantity So That We Can Get The Protection Back Again As There Are Many Choices

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 Post subject: Re: Samsung HD103SI burnt PCB
PostPosted: February 13th, 2015, 21:09 
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Joined: September 8th, 2009, 18:21
Posts: 15440
Location: Australia
Amarbir wrote:
BTW Frank What Once Do You Recommend To Keep At Hand In Bulk Quantity So That We Can Get The Protection Back Again As There Are Many Choices

Here in Australia I would buy SMBJ12A and SMAJ5.0A from Farnell or RS Components. I don't know what you have in India.

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