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ST4000VN008

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managerharry

Post subject: ST4000VN008

Posted: May 18th, 2022, 3:26

Joined: March 24th, 2010, 21:08
Posts: 111
Location: California

Seagate Ironwolf ST4000VN008. Drive was damaged by a faulty power supply. 5V TVS diode was shorted, along with 2 5v 0hm resistors. Replaced those, but while I get 5V on the first resistor, I only get .08 on the second and the new tvs diode and surrounding caps. So clearly there's an addition fault, any tips on tracking it down?

Thanks. Photo attached.

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ST4000VN008-pcb.jpg [ 550.78 KiB | Viewed 5301 times ]

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gps31

Post subject: Re: ST4000VN008

Posted: May 18th, 2022, 3:53

Joined: January 18th, 2010, 23:53
Posts: 346
Location: india

Check continuity between those Resisters, Looks like tracks damaged

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fzabkar

Post subject: Re: ST4000VN008

Posted: May 18th, 2022, 14:02

Joined: September 8th, 2009, 18:21
Posts: 16960
Location: Australia

The resistors should be vertical, not horizontal.

Attachments:

Resistors_wrong_orientation.jpg [ 123.29 KiB | Viewed 5247 times ]

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A backup a day keeps DR away.

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managerharry

Post subject: Re: ST4000VN008

Posted: May 18th, 2022, 19:02

Joined: March 24th, 2010, 21:08
Posts: 111
Location: California

Ahhh, damn I'm an idiot. That is why soldering at midnight is a bad idea :lol:

Thank you fzabkar, you are a legend! If you are ever in Los Angeles I owe you many pitchers of beer.

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