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Can Someone Help Me Identify Some Chips On A HDD PSB

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Sharne

Post subject: Can Someone Help Me Identify Some Chips On A HDD PSB

Posted: July 1st, 2016, 4:32

Joined: July 1st, 2016, 3:40
Posts: 3
Location: South Africa

Hi Guru's,

Can someone help steer me in the right direction to identify the below chips circled in red. The image below is not my board but identical, plus the ones on my board are fried beyond recognition.

Regards,

Sharne

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fzabkar

Post subject: Re: Can Someone Help Me Identify Some Chips On A HDD PSB

Posted: July 1st, 2016, 15:54

Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia

Those appear to be inductors. You will find that your 12V TVS diode is shorted.

Remove the shorted diode and run a jumper wire from the +12V SATA pins to the cathode pad of the diode (the striped end, marked with "v" on PCB).

Something like this ...

http://www.users.on.net/~fzabkar/HDD/ST ... S_wire.jpg (different PCB, same idea)

See the TVS Diode FAQ (heed the warnings):
http://www.hddoracle.com/viewtopic.php?f=100&t=86&p=102

If you upload a photo (or scan) of your own PCB, I'll show you what to do.

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A backup a day keeps DR away.

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Sharne

Post subject: Re: Can Someone Help Me Identify Some Chips On A HDD PSB

Posted: July 4th, 2016, 2:49

Joined: July 1st, 2016, 3:40
Posts: 3
Location: South Africa

fzabkar wrote:

Hi fzabkar,

Thanks for the assist. Below is a image of the board. I would prefer to identify and replace the parts that have fried.

Regards,

S

Attachments:

IMG_20160701_103739.jpg [ 744.31 KiB | Viewed 8048 times ]

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fzabkar

Post subject: Re: Can Someone Help Me Identify Some Chips On A HDD PSB

Posted: July 4th, 2016, 15:46

Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia

The 12V TVS diode can be replaced with an SMBJ12A.

The values of the chip inductors are unknown to me.

TPSMB13A, General Semiconductor (Vishay), 12V TVS diode, unidirectional, marking KVP, standoff 11.1V, breakdown 12.4V - 13.7V:
http://www.vishay.com/docs/88406/tpsmb.pdf
http://www.datasheetcatalog.org/datashe ... Xuytsz.pdf

Attachments:

12V_TVS_diode.jpg [ 68.76 KiB | Viewed 8038 times ]

inductors.jpg [ 136.57 KiB | Viewed 8038 times ]

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A backup a day keeps DR away.

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LarrySabo

Post subject: Re: Can Someone Help Me Identify Some Chips On A HDD PSB

Posted: July 4th, 2016, 16:52

Joined: December 8th, 2010, 11:37
Posts: 738
Location: Ottawa, Canada

Providing a PCB number (or at least drive identity details) would help.

_________________
Sabo Computer Repairs & Data Recovery

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Sharne

Post subject: Re: Can Someone Help Me Identify Some Chips On A HDD PSB

Posted: July 5th, 2016, 2:38

Joined: July 1st, 2016, 3:40
Posts: 3
Location: South Africa

LarrySabo wrote:

Providing a PCB number (or at least drive identity details) would help.

Hi LarrySabo,

The board reads TS-M-8V01C SG TOPSEARCH. Board revision number 100617465 rev B. The external HDD is a 2 TB Seagate Barracuda Green ST2000DL003.

Thanks to all for taking the time to help out.

Regards,
S

Thanks fzabkar for the info I will take it to a electronics store to see if they can supply new parts.

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fzabkar

Post subject: Re: Can Someone Help Me Identify Some Chips On A HDD PSB

Posted: July 5th, 2016, 2:47

Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia

@Sharne, FYI newer Seagate PCBs use zero-ohm resistors in place of inductors. This would suggest that Seagate has dispensed with the need for low pass filters on the supply input.

http://www.hddoracle.com/viewtopic.php? ... 1615#p8876

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