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 Post subject: pcb swap STM3250820A
PostPosted: January 21st, 2014, 12:27 
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Joined: September 22nd, 2013, 23:14
Posts: 23
Location: United States
I got the following drive with the symptoms of it not spinning up, with one burnt chip. the tvs diodes are not shorting it out.

I purchased a new pcb the matches:
Model number: STM3250820A
P/N: 9DP03E-326
Firmware: 3.AAE
Site Code: TK
Date Code: 07230 to 08xxx <-------this is the only thing different
Capacity: 250GB
Main Chip #: 100407840

When I power it up with the new pcb, it spins up, but is not detected with a DDI. when I listen close, I hear it spin up and make a click, which to me sounds as if its unparking, then it does nothing else, keeps spinning. Based on help I got on another post here, I was told this particular drive family does not need any adaptive services. Any thoughts?

original pcb
https://lh5.googleusercontent.com/VRjVr ... 02-h527-no


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 Post subject: Re: pcb swap STM3250820A
PostPosted: January 21st, 2014, 13:56 
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Joined: November 15th, 2012, 17:47
Posts: 226
Th SMOOTH chip is toated. It might have affected some other parts inside the HDA, through the DC-DC converter.


Last edited by Matiw on January 21st, 2014, 14:01, edited 1 time in total.

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 Post subject: Re: pcb swap STM3250820A
PostPosted: January 21st, 2014, 13:59 
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Joined: September 22nd, 2013, 23:14
Posts: 23
Location: United States
Spildit wrote:
Can you post a TTL/Terminal log of the drive ?
Conect that Seagate to TTL adaptor, open hyperterminal with the correct settings and power it up.
Terminal log will provide clues about what is going on with the drive !


It might take a few days to do this. I will and keep you posted. thanks!


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 Post subject: Re: pcb swap STM3250820A
PostPosted: January 21st, 2014, 14:00 
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Joined: September 22nd, 2013, 23:14
Posts: 23
Location: United States
Matiw wrote:
Have you observed the PCB properly ? Have I heard you say the PCB shown is the Original PCB ? I can see a toasted chip, the SMOOTH chip, at the bottom right corner.


Thanks :-) I did see the chip, forgot to mention that in the post. that was my reasoning for replacing the pcb.


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