(TVS) Identification Help on a WD PCB.

[hddsake]

I accidentally shorted the TVS on a couple of HDDs and found this site that showed me how to temporarily locate and cut the TVS to retrieve the data onto a brand new drive. I didn't realize that the power supply I was using was damaging the drives so I kept using it on different drives trying to figure out why the drives weren't working..... Long story short I have one WD 3.5" that I can't find the TVS.....

(29 NOV. 2002)
S/N: WMA8C3315613
MDL: WD1200JB-75CRA0
DCM: DSEHNA2AH
Sticker: 2061-001102-301C
Board: 2060-001102-003 REV. A

also a 160GB 2.5" WD laptop drive which I can't find the TVS for either.
Can anyone help me find these so I can get my data off these drives?
Sorry I don't have any pictures at this time but if I need to I can borrow a camera from someone to upload here. Thanks for any help.

[fzabkar]

You may be able to use a scanner.

Anyway, if this is your board, then it has no TVS diodes:
http://76.my/Malaysia/hdd-logic-board-p ... tech@5.jpg

Location D3 was probably reserved for a 5V TVS diode.

BTW, which supply rail was affected, +5V or +12V? I'm assuming it was the +5V supply, since your laptop drive wouldn't use the +12V rail.

[hddsake]

You may be able to use a scanner.

Anyway, if this is your board, then it has no TVS diodes:
http://76.my/Malaysia/hdd-logic-board-p ... tech@5.jpg

Location D3 was probably reserved for a 5V TVS diode.

BTW, which supply rail was affected, +5V or +12V? I'm assuming it was the +5V supply, since your laptop drive wouldn't use the +12V rail.

Am I just S.O.L. on these two drives then? On the laptop drive I see a D1 and D2.... but those aren't near the the power connectors like the 3.5" drive that I fixed.

[hddsake]

You may be able to use a scanner.

Anyway, if this is your board, then it has no TVS diodes:
http://76.my/Malaysia/hdd-logic-board-p ... tech@5.jpg

Location D3 was probably reserved for a 5V TVS diode.

BTW, which supply rail was affected, +5V or +12V? I'm assuming it was the +5V supply, since your laptop drive wouldn't use the +12V rail.

Oh I almost forgot, yes that is the board.

[hddsake]

Am I just out of luck on my other 3.5" drive and the 2.5" drive?

[Nick_CT]

It seems that way.

[fzabkar]

There is a similar board in this thread:
easy-faultdiagnostic-troubleshooting-must-try-t12319.html

I don't know if a straight board swap will work, but you could at least measure the various voltages, if only as a post mortem exercise.

As for your 2.5" drive, if you can't provide a photo, then how about a model number, or a Google image?

[hddsake]

There is a similar board in this thread:
easy-faultdiagnostic-troubleshooting-must-try-t12319.html

I don't know if a straight board swap will work, but you could at least measure the various voltages, if only as a post mortem exercise.

As for your 2.5" drive, if you can't provide a photo, then how about a model number, or a Google image?

Fzabkar the board on the 2.5" is....
2060-701450-011 Rev A
sticker:2061-701450-Z00 AF
It is a WD Scorpio WD1600BEV

[fzabkar]

If this is your board, then I don't see any TVS diodes:
http://i.ebayimg.com/18/!BtPWjWwCGk~$(K ... Dg~~_3.JPG

Worse still, there is no chip at U12, which means that the "adaptive" data are internal to the Marvell MCU.

If you have a multimeter, you could always measure the voltages at the +3.3V and +1.2V test points.

[BlackST]

Worse still, there is no chip at U12, which means that the "adaptive" data are internal to the Marvell MCU.

It depends on who services the drive to get data even with (= without) totally blown PCB...