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seamate12
Posts: 1
Registered: ‎07-05-2012
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Power surge and Barracuda Board - Need some help!

Hi folks, due to faulty power supply in a PC I have a Barracuda 7200.12 500GB with a  board that has several fried components. I am trying to ID the components or find a schematic. I have expertise and tools to replace them. Any help appreciated and please see the photo for the components in question...

Yottabyte
fzabkar
Posts: 4,656
Registered: ‎01-27-2009
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Re: Power surge and Barracuda Board - Need some help!

Here is a similar thread:
http://forums.seagate.com/t5/Barracuda-XT-Barracuda-Barracuda/Barracuda-LP-Green-ST2000DL003-burnt-s...

I believe that the burnt components are inductors. You will probably find that the 12V TVS diode is also shorted. It is located at the bottom left corner of PCB.

I suggest you remove the diode, or replace it with an SMBJ12A. Replace the inductors with wire links. Clean up the charred area with a toothbrush and isopropyl alcohol. Alternatively, if it is easier for you, run a jumper wire from the +12V supply (pins #13, 14, and 15 at the SATA power connector) and the cathode (striped end) of the diode.

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

http://www.users.on.net/~fzabkar/HDD/ST3500418AS_12V_TVS.jpg
http://www.users.on.net/~fzabkar/HDD/ST3500418AS_5V_inductors.jpg
http://www.users.on.net/~fzabkar/HDD/ST3500418AS_EEPROM_5V_TVS.jpg

Good luck.