Good Afternoon

I am attempting to source a PCB for my HDD. The info on the main chip is as follows:-
1st Line: UAB-M3071-S
2nd Line:D2.2 0
3rd Line: 0A58780
4th Line: DECNSG
5th Line: 0835 E9 (E9 is in a circle)
6th Line: ZA83401900F

The info for the HDD is as follows:

Make: Hitachi
Model: HD721010SLA360
P/No:0A38016
PCB Info: 0A29896 BA2950C Z60906 1BWF

I have attached a photo

Regards

Hi,

The first two lines on the white sticker need to match.
http://www.hddzone.com/conditions.html

Loki

Sorry should have read that.

The sticker shows:

0A29896
BA2950C
Z60906
1BWF

Confirmed on the HDDZone website that they do not have the PCB I need.

Can anyone advise where I would get one?

Regards

No success with the website quoted.

Does anyone know where else I can source one of these?

Regards

I guess you'll have more luck if you post this on Hard Drive Market section of the forum.

Usually people find what they're looking for.

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I can say this is a rare pcb though, it won't be easy...

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Thank you to all who has helped so far.

It is my luck that the PCB I need is rare.... typical.

Could anyone help in identifying where the TVS diodes are on the PCB?

I can post better quality image if required.

Thanks in advance

The TVS diodes (and another, I believe reverse polarity protection diode) are next to the SATA power connector on that PCB.

However, you don't seem to have mentioned (a) what caused the original problem (e.g. wrong PSU used with the drive in an external enclosure?) nor (b) the current symptoms of the drive (e.g. does it spin when power is applied? does it click repeatedly? is it recognised in the PC BIOS setup screen? etc.), so it's impossible to comment on whether the TVS may be involved.

Another member (fzabkar) wrote a TVS FAQ, which you might find useful:

hdd-tvs-diode-faq-t20727.html

@Vulcan
Sorry should have mentioned what happened.

I used the wrong power cable to the HDD enclosure. The LED on the front flashes continously and the HDD does not spin up.

Apparently these are classic symptoms that the diode has blown.

Regards

Thanks for explaining - so damage to the 12V TVS seems likely. Other damage is also possible. If you are accepting the risks of DIY, understand the need to follow ESD (anti-static) precautions, and have some electronics skill, then you could follow fzabkar's TVS FAQ linked via the posting I gave before, to test it. From your photo, the 12V TVS seems to be D3 - you should compare its actual markings to that FAQ for confirmation. I can't see on the (slightly blurry ) photo, but there may be (an abnormal) dark patch on the diode body itself.

Thanks Vulcan.

I have ordered a multimeter and will carry some testing.

I have attached a better quality image. Is D3 the black "box" to the right of D3 and D4 the black "box" to the left of D4.

Excuse my "noobness" but I'm getting there!!!

Regards

Yes.

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Thank you one and all for your help and guidance.

Going to give it a go next week

Cheers

Thought I'd let you know that I removed both diodes and can now access the data off the HDD. Took the plunge and it worked!!