Barracuda XT, Barracuda, Barracuda Green, DiamondMax and other desktop SATA and IDE drives

[meganmmf]

Can anyone out there help me?  I fried my logic board and want to try a replacement.  Having a VERY hard time finding one with the correct firmware.

Here's what I need it for:

Seagate Barracuda 7200.11

500 GB

S/N: 5QM138MH 

ST3500320AS 

P/N: 9BX154-568

Firmware: SD35

I would also totally be willing to buy the drive if someone has it....

Thanks in advance!   

[fzabkar]

Even if you manage to find a replacement board, you will probably need to transplant the 8-pin serial EEPROM chip from patient to donor. This is because it stores calibration data determined at the factory.

Can you upload a detailed photo of your board to a file sharing service?

This article will help you identify the components:

http://hddscan.com/doc/HDD_from_inside.html

Did you overvolt your drive?

[Thisamenis]

Hi all,

I have the same problem. I overvolt my drive with 19V by mistake.

It is a Seagate ST3500320AS Barracuda 7200.11 500GB SATA

Board Number: PCB 100466725
REV A DLAJ-4

Model: ST3500320AS
P/N: 9BX154-568
Firmware: SD81
Date Code: 09161
Site Code: WUXISG
Product of China

This HDD was in an external freeagent that by mistake was supplied with 19V voltage. I took out the HDD and checked it as an internal to my computer but unfortunately when this HDD is plugged on, the computer doesn't start at all. I assume that its circuit was burned. I am about to order a new PCB with these characteristics:

Main Controller IC: ST V523C or LSI TT85501C

HDD Motor Combo IC: 100369972

Cache Memory: 16MB

Board Number: 100466725

Firmware: SD15

This is the only PCB I found in the market. I was hopping that it might work if I just replace PCBs but as the firmware is different I have less chances.  There are many things that puzzle me:

If I put the PCB above in the place of mine as it is, is there a chance to see my data and if not, is there  a possibility to make things worse damaging the HHD and loosing data?

If I swap the PCBs and use seagate's Firmware Update Utility, will this help the PCB to read the data from my HDD?

My final solution is to "transplant the 8-pin serial EEPROM chip from patient to donor" as you said but from the useful article that you hared withus, I can see that this job needs an expert in order transplant these chips. I believe that special equipment is needed as chips are welded on the circuit and are not just socketed on a socket like the on of a motherboard's bios chip. Is that so? 

(I hope my point of view was comprehensible. It was difficult for me to use the appropriate terminology.)

[fzabkar]

If you have a multimeter, measure the resistance of the 12V TVS (transient voltage suppression) diode near the power connector.

The following article will help you identify the components:

http://hddscan.com/doc/HDD_from_inside.html

If this diode measures zero ohms, desolder it or snip it out with side cutters. Just be absolutely sure your power supply can be trusted. Your hard drive will work OK without the diode, albeit without protection on the 12V rail.

If you need one of us to help you identify the diode, then upload a photo of your PCB to an image hosting site and post its URL here.

For continued protection, you can replace your diode with an SMBJ12A (12V). These are available from Farnell, Mouser, Digikey.

Does the following photo match your damaged board/component?

http://img356.imageshack.us/img356/4019/friedpcbox6.jpg

The charred component is the 12V TVS diode.

Message Edited by fzabkar on 08-02-2010 09:04 PM

[meganmmf]

Yes I did overvolt the drive.  Smelled burning, the whole deal.

Here is a photo of the front of the board - I have to get the right tools to remove and shoot the front.

http://s934.photobucket.com/albums/ad185/meganmossfree/?action=view&current=MMF_0763.jpg&newest=1 

Any suggestions?  Or do you need to see the front too...? 

Thanks. 

Message Edited by meganmmf on 02-08-2010 08:30 AM

[fzabkar]

You need to examine and repair the component side (front) of the board.

To remove the board, you will need a Torx screwdriver.

[Thisamenis]

fzabkar you were absolutely right. The photo matches with my damaged board. But, I removed the board and didn't see anything fried as I was expecting.

Next step is to find multimeter to check the diode's health.

You can see my PCB here

[meganmmf]

Thanks-

Here is the component side of the board:

http://s934.photobucket.com/albums/ad185/meganmossfree/?action=view&current=MMF_0787.jpg

Of course I could be wrong, but to me it looks a little "fried" in parts.  In fact - the area highlighted in the image you posted, is the same area that appears to be effected on my board.

Message Edited by meganmmf on 02-09-2010 01:25 PM

[meganmmf]

Is this the 12V TVS diode?  Would I be able to replace just this - or do I need a whole new board?

Thank you so much for your time - I really appreciate it. 

[fzabkar · Accepted solution]

The 12V TVS diode is the black component in the top LH corner of the board in this photo:

http://i934.photobucket.com/albums/ad185/meganmossfree/MMF_0787.jpg

The photo is very blurry in this area, so I can't see the charring. To test the diode's resistances with a multimeter (DMM), you need to set the DMM to the 200 ohms resistance range. Connect the black probe lead to the DMM's COM banana socket, and the red probe to the Volt/Ohm socket. Then connect the probe tips to each side of the diode. If the meter reads near zero, then the diode is shorted. Note that the meter leads will have a finite resistance which you can verify by touching the probe tips together.

This tutorial should help you:

http://www.ladyada.net/learn/multimeter/resistance.html

Read "Example 1. Testing a resistor".

If this diode measures zero ohms, desolder it or snip it out with side cutters. Just be absolutely sure your power supply can be trusted. Your hard drive will work OK without the diode, albeit without protection on the 12V rail.

For continued protection, you can replace your diode with an SMBJ12A. These are available from Farnell, Mouser, Digikey.