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MK4021GAS can't spin up

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Hee

Post subject: MK4021GAS can't spin up

Posted: October 26th, 2010, 4:50

Joined: April 13th, 2010, 3:37
Posts: 32
Location: south korea

Hello.

MK4021GAS can't spin up.

when i try swap other hdd's PCB, it spin up.

so, i think PCB problem.

is it possible swap same model's PCB?

if not

i want to know what chip has firmware on PCB.

Attachment:

File comment: MK4021GAS PCB

DSC_0024.jpg [ 663.93 KiB | Viewed 4521 times ]

thanks.

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DR-Kiev

Post subject: Re: MK4021GAS can't spin up

Posted: October 26th, 2010, 5:28

Joined: March 7th, 2009, 12:43
Posts: 1091
Location: Angel Data Recovery

Hee wrote:

Hello.

MK4021GAS can't spin up.

when i try swap other hdd's PCB, it spin up.

Check both 0-resistors near D1

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Angel Data Recovery

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Hee

Post subject: Re: MK4021GAS can't spin up

Posted: October 26th, 2010, 6:16

Joined: April 13th, 2010, 3:37
Posts: 32
Location: south korea

DR-Kiev wrote:

Hee wrote:

Hello.

MK4021GAS can't spin up.

when i try swap other hdd's PCB, it spin up.

Check both 0-resistors near D1

i'm already check it, by multi tester's continuity test.
when i check it, sounds beep.
so i think 0-resistors fine.

is it wrong?

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fzabkar

Post subject: Re: MK4021GAS can't spin up

Posted: October 26th, 2010, 16:23

Joined: September 8th, 2009, 18:21
Posts: 16963
Location: Australia

Hee wrote:

when i check it, sounds beep.
so i think 0-resistors fine.

is it wrong?

That's fine. However, they're not resistors, but 2A fuses, assuming I'm looking at the same components.

Littelfuse Surface Mount Fuses (N = 2A, S = 4A):
http://www.farnell.com/datasheets/48294.pdf

_________________
A backup a day keeps DR away.

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DR-Kiev

Post subject: Re: MK4021GAS can't spin up

Posted: October 27th, 2010, 15:29

Joined: March 7th, 2009, 12:43
Posts: 1091
Location: Angel Data Recovery

Hee wrote:

MK4021GAS can't spin up.

is it possible swap same model's PCB?

No.

Hee wrote:

i want to know what chip has firmware on PCB.

This one:

Attachments:

DSC_0024[2].JPG [ 40.72 KiB | Viewed 4447 times ]

_________________
Angel Data Recovery

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Hee

Post subject: Re: MK4021GAS can't spin up

Posted: October 27th, 2010, 20:21

Joined: April 13th, 2010, 3:37
Posts: 32
Location: south korea

DR-Kiev wrote:

Hee wrote:

MK4021GAS can't spin up.

is it possible swap same model's PCB?

No.

Hee wrote:

i want to know what chip has firmware on PCB.

This one:

Thanks.
i'll try it.

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