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 Post subject: Hitachi Deskstar 7k2000.b spins up then stops - PCB problem?
PostPosted: November 27th, 2012, 22:10 
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Joined: November 27th, 2012, 21:59
Posts: 94
Location: Upstate NY, USA
Hi guys,
I just picked up a Hitachi Deskstar 7k2000.b HDT721010SLA360 1TB hard drive for cheap, but the condition was unknown. When I plugged it in, it spins up to full speed for 5 seconds, then spins down and can't be read by any computer or adapter. Is this a PCB problem? Can I replace the PCB easily myself?

Here are some pics of the PCB: http://goo.gl/6Bhgc

Thanks,
JGAN


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 Post subject: Re: Hitachi Deskstar 7k2000.b spins up then stops - PCB prob
PostPosted: November 28th, 2012, 8:36 
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Joined: November 27th, 2012, 21:59
Posts: 94
Location: Upstate NY, USA
Correction: It's a 7k1000.b drive. Also, I checked everything that looked like a diode with a multimeter and they all had resistance.


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 Post subject: Re: Hitachi Deskstar 7k2000.b spins up then stops - PCB prob
PostPosted: November 28th, 2012, 9:51 
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Joined: May 21st, 2007, 16:10
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Location: Gothenburg/ Sweden
I would say that heads are gone, if you put your ear close to it can you then hear a faint clicking sound during the calibrationprocess?

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 Post subject: Re: Hitachi Deskstar 7k2000.b spins up then stops - PCB prob
PostPosted: November 28th, 2012, 10:01 
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Joined: November 27th, 2012, 21:59
Posts: 94
Location: Upstate NY, USA
When is the calibration process? I don't think there is any clicking when it is plugged in.


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 Post subject: Re: Hitachi Deskstar 7k2000.b spins up then stops - PCB prob
PostPosted: November 28th, 2012, 16:08 
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Joined: May 21st, 2007, 16:10
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Location: Gothenburg/ Sweden
It's when the drive spin up, put your ear against the drive and power it up...how does it sound...any faint clicks?

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 Post subject: Re: Hitachi Deskstar 7k2000.b spins up then stops - PCB prob
PostPosted: November 28th, 2012, 16:59 
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Joined: November 27th, 2012, 21:59
Posts: 94
Location: Upstate NY, USA
No clicking at all, spins up like normal.

I just accidentally booted up the drive without the controller fully on to the hard drive - one chip did not touch the board. Without this chip, the hard drive didn't shut down, but it still wouldn't be recognized by the computer. The chip is in an indent on the bottom of the hard drive, contacting the unexposed side of the PCB. It is a 22-pin transistor, with "A1A6 N6NC" on it. Any clue if this is related?


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 Post subject: Re: Hitachi Deskstar 7k2000.b spins up then stops - PCB prob
PostPosted: November 29th, 2012, 1:10 
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Joined: August 21st, 2012, 12:15
Posts: 285
Location: India
JGAN wrote:
No clicking at all, spins up like normal.

I just accidentally booted up the drive without the controller fully on to the hard drive - one chip did not touch the board. Without this chip, the hard drive didn't shut down, but it still wouldn't be recognized by the computer. The chip is in an indent on the bottom of the hard drive, contacting the unexposed side of the PCB. It is a 22-pin transistor, with "A1A6 N6NC" on it. Any clue if this is related?



I think when only the motor connector is connected ,then the drive (will not shut down) keep spinning.
In your case , the heads are trying to read info from the platters , and spinning down when they fail to do so, hence suggested to listen for faint clicks by the member mr_spokk
Mostly this drive has some internal faults , and not PCB fault as you think .
So if you dont want any data from it, go for another drive,


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 Post subject: Re: Hitachi Deskstar 7k2000.b spins up then stops - PCB prob
PostPosted: November 29th, 2012, 3:13 
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Joined: November 29th, 2006, 10:08
Posts: 7864
Location: UK
NOT PCB fault.

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 Post subject: Re: Hitachi Deskstar 7k2000.b spins up then stops - PCB prob
PostPosted: November 29th, 2012, 16:48 
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Joined: November 27th, 2012, 21:59
Posts: 94
Location: Upstate NY, USA
Ok thanks guys. If anybody wants to buy the PCB, it's a 0A58786 ;)


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