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Seagate ST31000528as 1TB burnt PCB can i fix it?

5K views 5 replies 3 participants last post by  fzabkar 
#1 ·
Hello

I was wondering if the areas circled in this picture Electronic engineering Electronics Technology Circuit component Computer hardware
can be fixed with a small piece of wire in each spot?
 
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#2 ·
Any idea what caused this ? Most likely other damage has occurred on the board that is not visible. I would say you "had" components there such as capacitor or diode and they are now burned up. Bad PWR Supply ? I think your going to have to get a new logic board and get the rom information swapped over. One vendor is How people say about us there are others as well on the web
 
#4 ·
ISTM that there was an overvoltage on the +12V supply.

The 12V TVS diode is missing. Is there any reason for this, ie did you remove it?

http://www.users.on.net/~fzabkar/HDD/ST31000528AS_TVS.jpg
http://www.users.on.net/~fzabkar/HDD/ST1000528AS_fix.jpg

As for wires, if the component is an inductor, then a wire will be necessary. If it's a capacitor, then it won't need to be replaced.

What you need to do is to determine whether the ends of each component are connected to ground or +12V or +5V. That will tell you whether they're capacitors or inductors.

If you choose to replace the board, then you will need to move the 8-pin serial flash memory chip to your donor PCB. PCB suppliers such as onepcbsolution.com and hdd-parts.com include a firmware or "ROM" transfer service for US$10 - $20. Otherwise your local TV repair shop should be able to handle it.
 
#5 ·
I was reading several post on different websites that said that they removed the 12v tvs and that fixed the Hard Drive. I really want the info off the hdd it wasn't working so i figured I had nothing to lose. I think Im going to get a new PCB from one of those websites at this point.
 
#6 ·
Assuming the 12V TVS diode was shorted, then you need to run a wire from the ground pins at the SATA power connector to the grounded pad (anode) of the diode. Then run a wire from the +12V pins to the pad at the striped end (cathode). There is a little "v" on the PCB that identifies the anode.

Here is the pinout of the SATA power connector:
Serial ATA (SATA) power connector pinout and wiring @ pinouts.ru

If the 5V TVS diode is shorted, then you need to remove it and wire its +5V and ground pads to the SATA connector. That's a straightforward job for anyone with a modicum of soldering experience.

I suggest you buy a multimeter and take some measurements first, though.

Here is one for US$5:

Cen-Tech 90899 7 Function Digital Multimeter:
Digital Multimeter - Save on this 7 Function Digital Multimeter

Cen-Tech 90899 7 Function Digital Multimeter User Manual:
http://manuals.harborfreight.com/manuals/90000-90999/90899.pdf
 
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