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 Post subject: Trouble with a Seagate 7200.10 ST3250620AS
PostPosted: April 2nd, 2020, 9:44 
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Joined: March 2nd, 2020, 6:04
Posts: 9
Location: Sweden
Hi there,

I'm new to the world of professional data recovery, but I aim to do this for a living.

I've bought a PC 3000 UDMA and explained my situation to a few people - that I'm just starting out and am looking for some drives to diagnose and try to extract data from. This has so far rendered me a ST3250620AS, and it's completely dead. The platters don't spin, heads won't move, and the terminal won't connect. There are no signs of life whatsoever. I'm thinking it's the PCB, especially now that the donor told me that it had a burnt smell before dying. Physically the PCB looks fine, though.

The PCB sticker says 100436228F. It's my understanding that the PC 3000 can extract the data from EEPROM but since it's not making a connection I'd like to extract it by other means. Preferably with a pogo pin adapter and a suitable reader/programmer but I don't know where to find one besides amazon and they're not shipping to my location. Any ideas?

PS. I've checked for continuity on what I believe to be two TSV:s close the power port, and they're not making a connection. Then there's another chip by the opposite side of the connector that delivers power to the motor that I suspect might be a TSV too. That one is making a connection. Could I try to knock it off, or should I leave it the way it is? Is there any other stuff so far that I might've overlooked? (Apparently it's fairly common that the motor will seize on these drives, but my reasoning is if that's the case then there should be at least some noise coming from it).

PPS. A matching PCB is already on its way however I'd like to spend more time hands-on with this while waiting, so any advice on what to do or try in the meantime would be greatly appreciated.


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 Post subject: Re: Trouble with a Seagate 7200.10 ST3250620AS
PostPosted: April 3rd, 2020, 3:01 
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Joined: August 3rd, 2012, 7:47
Posts: 353
Location: slovenija
Hello
search hddguru forum or check on http://www.hddoracle.com/index.php

start with PCB diodes check.

https://forum.hddguru.com/viewtopic.php ... e+tv+diode
https://forum.hddguru.com/viewtopic.php ... e+tv+diode
https://forum.hddguru.com/viewtopic.php ... e+tv+diode


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 Post subject: Re: Trouble with a Seagate 7200.10 ST3250620AS
PostPosted: April 3rd, 2020, 3:09 
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Joined: March 2nd, 2020, 6:04
Posts: 9
Location: Sweden
jerovsek wrote:


Cheers mate, I'll go have a look at that right away. Thank you :)


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 Post subject: Re: Trouble with a Seagate 7200.10 ST3250620AS
PostPosted: April 3rd, 2020, 7:09 
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Joined: March 2nd, 2020, 6:04
Posts: 9
Location: Sweden
Alright, I've done a couple more measurements. I'm pretty sure A and B are the 12V and 5V TSV's respectively, part C and D I'm just assuming are TSV's. Pictures here: https://imgur.com/a/GKbPPbB

Part A shows 21M ohm one way and OL the other way.
Part B shows 11.3k ohms one way and 15.7k ohms the other way.
Part C is shorted.
Part D is 1k ohm one way and 14.7k ohm the other way
The motor is seeing 0V while the drive is powered on (measured between the pads on the traces going to the motor and ground).
I've also measured resistance between GND and 3.3V, GND and 5V, and GND and 12V at the voltage connector pins. There's no short there.

Nothing gets hot while the drive is on, it's as if it isn't even supplied power from what I can tell. I don't know what else to measure at this point.


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 Post subject: Re: Trouble with a Seagate 7200.10 ST3250620AS
PostPosted: April 7th, 2020, 3:10 
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Joined: March 2nd, 2020, 6:04
Posts: 9
Location: Sweden
The donor board just arrived, it's supposedly also a "100436228 F" according to the order, although it came without a sticker. Note that most of the previously empty pads are now populated. Picture here: https://i.imgur.com/lYtDFjm

Although a component on the lower left looks like it's loose, it is making a connection. The blue thing you're seeing is me keeping the pcb from connecting to the head stack as the EEPROM isn't reprogrammed. Anyway, the drive still isn't making a sound even though it's now getting power (12V). I now believe the motor has seized. Any ideas before I open the drive up and check? (I don't have access to a laminar flow bench, but then again the data is not important).


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