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lunchboxes
 Post subject: Can anyone help? Question about Seagate HD
PostPosted: June 2nd, 2008, 13:54 
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Joined: June 2nd, 2008, 13:40
Posts: 2
I damaged one inductor on the PCB of Seagate ST3320620AS

The inductor is written as 3R3

I want to replace that SMD

But I am not sure that if I can use TDK VLCF5020T-3R3N1R6 to replace it

Here is the data sheet of TDK power inductor

http://www.tdk.de/company/inductors_coi ... cf5020.pdf

and here is the pix of my seagate harddisk pcb
The damaged part is inside the red circle

http://us.f6.yahoofs.com/hkblog/rZbsucqeBRmvtMy0i78iu44Dmg--_1/blog/20080531113638971.jpg.jpg?ib_____DWYHCLZiH

Any expert can help me out? Thanks
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Dmitry Postrigan
 Post subject: Re: Can anyone help? Question about Seagate HD
PostPosted: June 5th, 2008, 10:05 
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Joined: September 27th, 2005, 8:21
Posts: 765
Most likely (99%) you can use it.

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lunchboxes
 Post subject: Re: Can anyone help? Question about Seagate HD
PostPosted: June 6th, 2008, 10:43 
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Joined: June 2nd, 2008, 13:40
Posts: 2
Thank you for your reply.
I will go get it.
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Amarbir[CDR-Labs]
 Post subject: Re: Can anyone help? Question about Seagate HD
PostPosted: June 6th, 2008, 14:32 
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Joined: August 15th, 2006, 3:01
Posts: 3522
Location: CDRLabs @ Chandigarh [ India ]
lunchboxes wrote:
I damaged one inductor on the PCB of Seagate ST3320620AS

The inductor is written as 3R3

I want to replace that SMD

But I am not sure that if I can use TDK VLCF5020T-3R3N1R6 to replace it

Here is the data sheet of TDK power inductor

http://www.tdk.de/company/inductors_coi ... cf5020.pdf

and here is the pix of my seagate harddisk pcb
The damaged part is inside the red circle

http://us.f6.yahoofs.com/hkblog/rZbsucqeBRmvtMy0i78iu44Dmg--_1/blog/20080531113638971.jpg.jpg?ib_____DWYHCLZiH

Any expert can help me out? Thanks



Hi ,
Try a Direct Shorting of The Same also ,It Will Not Spoil the PCB for Sure ,See If It works till Replacement Comes

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Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com
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pepe
 Post subject: Re: Can anyone help? Question about Seagate HD
PostPosted: June 6th, 2008, 17:48 
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Joined: October 3rd, 2005, 0:40
Posts: 4755
Location: Hungary
Hi Amarbir,

These things are parts of DC-DC converters running at some hundred KHz. At this frequency these have some reasonable impedance that your short won't have -> it will overload the driving circuit.

pepe

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Amarbir[CDR-Labs]
 Post subject: Re: Can anyone help? Question about Seagate HD
PostPosted: June 7th, 2008, 0:44 
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Joined: August 15th, 2006, 3:01
Posts: 3522
Location: CDRLabs @ Chandigarh [ India ]
pepe wrote:
Hi Amarbir,

These things are parts of DC-DC converters running at some hundred KHz. At this frequency these have some reasonable impedance that your short won't have -> it will overload the driving circuit.

pepe


Pepe ,
True ......But What He Could Try Is a Inductor or the Same Value From Other Bad HDD's

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Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com
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BlackST
 Post subject: Re: Can anyone help? Question about Seagate HD
PostPosted: June 7th, 2008, 3:06 
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Joined: July 18th, 2006, 3:05
Posts: 7476
Location: ITALY
Amarbir, they would have not fitted an inductor if could be shorted... It's part of the circuit. A smps with one or more coils short in the primary typically break the switching or trigger the protection (basic engineering of smps or dc-dc converter circuits!) sorry could not resist posting, despite I quit definitively dr and related stuff - at last! . Regards
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Amarbir[CDR-Labs]
 Post subject: Re: Can anyone help? Question about Seagate HD
PostPosted: June 10th, 2008, 14:47 
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Joined: August 15th, 2006, 3:01
Posts: 3522
Location: CDRLabs @ Chandigarh [ India ]
BlackST wrote:
Amarbir, they would have not fitted an inductor if could be shorted... It's part of the circuit. A smps with one or more coils short in the primary typically break the switching or trigger the protection (basic engineering of smps or dc-dc converter circuits!) sorry could not resist posting, despite I quit definitively dr and related stuff - at last! . Regards


True ,
Thats What i Said ,and Do Not Worry We Will Get You Back In DR BL :vo:

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Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com
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