Need help finding TVS on WD Blue Scorpio 1TB Hardrive (2.5)

[xenohunter]

Hi Guys,

This is my first time seeking hardware/electronics help, and honestly, i'm a bit of an amateur at stuff like this. But here's the basic story:

1. I plugged a 1tb WD Blue Scorpio drive (http://www.wdc.com/en/products/products.aspx?id=800) into an external 2.5" enclosure. It just needs 2usbs to power it, no power lead etc.
2. This worked fine for a good few months until I then tried to plug it into a powered USB hub, which seemed to short both the enclose I was using and something on the drive itself.
3. I got a new enclosure but now when it is plugged in it doesn't make any noise/attempt to spin up.
4. So i got reading online and apparently something called a TVS diode/s may have fused, but after taking the drive apart with my T5s and accessing the circuit board, I can't see it.
5. Basically I just need help finding this TVS diode so that I can try and recover my data, which is semi-critical. Please circle the right one/ones and provide the number/code thing- i'm not very good with this stuff.

Here are some pictures of it:

http://www.storagereview.com/western_di ... w_wd10jpvt has some very clear pictures of the board, this is identical to mine.

Actual pics taken by me:

http://i60.tinypic.com/16bkm8l.jpg

and

http://i59.tinypic.com/29uvdc0.jpg


Thanks for taking the time to read my question and i hope someone can help me rescue the data on this HD .

[ShaneWard]

The object at L4 might be the Diod, but I can't be sure, better wait and make sure before snipping it off and do not use that USB hub again. If it blew your drive.

Attachments

[pcimage]

More than likely your best chance is to replace the PCB and move the ROM chip over. I can help you with this.

[fzabkar]

L4 is an inductor. It is part of an onboard DC-DC converter, possibly Vcore. Don't remove it.

Ln = inductor
Cn = capacitor
Rn = resistor
Dn = diode
Un = IC
Qn = transistor
Yn = crystal
SKn = shock sensor

That said, I can't see any TVS diode. If the PCB is truly faulty, then it may be easiest to replace it and transfer U12, or its contents, from patient to donor. Some PCB suppliers (eg onepcbsolution.com) include this service in the price (US$50 in total).

BTW, are you sure that the drive isn't making any sound? If it is buzzing softly, then this would indicate a stiction problem.

[xenohunter]

Thanks for all the replies guys, very much appreciated that people are taking the time to help me with this-

@ShaneWard Thanks for your input. Subsequent replies indicate this may be something else so I will hold off on snipping atm.

@pcimage i'll look into my options and potentially will be in touch, would depend on cost/location etc.

@ fzabkar Thanks for the advice. I'll have another opportunity tomorrow morning to see if there is a potential striction problem, i'll report back about that.

[ShaneWard]

Yeah, don't worry like I said before I wasn't sure, good job you waited. And sadly I can't find any protection devices on the PCB do the board might be fried, although have you tried to connect the drive to your sata port on your computer directly?

[xenohunter]

Not tried connecting it directly yet, only problem is that there is no actual OS on the drive, but I guess I could connect it to an old laptop and try to boot from disc etc into Linux to see if it works. Might give that a whirl.

Going to reassemble it later on today and then hopefully I can do some more of the stuff recommended here like check if its making a noise or if a direct sata connection would help!

Will report back. Thanks again everyone .