All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 9 posts ] 
Author Message
 Post subject: Western Digital WD10EARS-00VWB0 - DEAD/no signs of life
PostPosted: May 21st, 2017, 13:38 
Offline
User avatar

Joined: May 21st, 2017, 10:42
Posts: 18
Location: Bristol, UK
This is the first of 2 sata hard drives that have come into my workshop this week and both present as "DEAD/no signs of life".

I need help in fixing the PCBs of these hard drives. I will try to explain as much as I know and what I am trying to find out, for each drive.

First..... The Backstory:
Both drives were connected to a semi-modular PSU. The PSU suffered a problem and 'died'; the PSU and only the PSU was changed for a new working one. The modular cables from the old PSU were left in place and when the NEW PSU was powered on, this is when the hard drives died; that's what I was told.

What I know / don't know:

Seagate ST1000DX001 (1TB 3.5" HHD)
==================================
[Pictures C, D, E]

PCB serial #: 2060-771698-002 REV-P1

Components with obvious damage:
U1 - Smooth L7251 3.1 Spindle motor + VCM controller ST Microelectronics Chip

As shown in pictures C & E, the U1 chip is clearly damaged.

Question:
4) Are there any other components that I should test.


Attachments:
File comment: Picture E
E.170512-IMG_20170512_163757.jpg
E.170512-IMG_20170512_163757.jpg [ 1.62 MiB | Viewed 10422 times ]
File comment: Picture D
D.170512-IMG_20170512_163420.jpg
D.170512-IMG_20170512_163420.jpg [ 2.5 MiB | Viewed 10422 times ]
File comment: Picture C
C.170512-IMG_20170512_163404.jpg
C.170512-IMG_20170512_163404.jpg [ 2.37 MiB | Viewed 10422 times ]
Top
 Profile  
 
 Post subject: Re: Seagate ST1000DX001 - DEAD/no signs of life
PostPosted: May 21st, 2017, 13:48 
Offline

Joined: October 21st, 2007, 8:48
Posts: 1631
pickleit wrote:
Seagate ST1000DX001 (1TB 3.5" HHD)
==================================
[Pictures C, D, E]

PCB serial #: 2060-771698-002 REV-P1

You meant WD not ST.
Find a working PCB and transfer U12 from patient to donor PCB.
Good luck


Top
 Profile  
 
 Post subject: Re: Seagate ST1000DX001 - DEAD/no signs of life
PostPosted: May 21st, 2017, 14:14 
Offline
User avatar

Joined: April 3rd, 2011, 0:19
Posts: 2003
Location: Providence, RI
I think the OP switched his titles of the two topics he started.

As to this one, Unknown has it right. Just find another PCB with number 2060-771698-002 REV P1 (doesn't matter what model it's from) and move the U12 chip over to to the new board. You'll waste far more time and effort trying to fix the original board than it'll take to just replace it with ROM transfer.

_________________
Data Medics - Hard Drive, SSD, and RAID Data Recovery Service Company


Top
 Profile  
 
 Post subject: Re: Seagate ST1000DX001 - DEAD/no signs of life
PostPosted: May 21st, 2017, 15:22 
Offline
User avatar

Joined: May 21st, 2017, 10:42
Posts: 18
Location: Bristol, UK
data-medics wrote:
I think the OP switched his titles of the two topics he started.

As to this one, Unknown has it right. Just find another PCB with number 2060-771698-002 REV P1 (doesn't matter what model it's from) and move the U12 chip over to to the new board. You'll waste far more time and effort trying to fix the original board than it'll take to just replace it with ROM transfer.


Yup, I got the titles of the two posts mixed up. I would change the title, but I don't have the ability to do so.


Top
 Profile  
 
 Post subject: Re: Seagate ST1000DX001 - DEAD/no signs of life
PostPosted: May 21st, 2017, 15:43 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
Mixing cables between modular PSUs often results in 12V being impressed on the 5V supply. I would expect that the 5V TVS diode (D3) will be shorted, and its associated zero-ohm resistor (R67) open.

Catastrophic failures in Western Digital PCBs:
http://www.hddoracle.com/viewtopic.php?f=59&t=1119&p=5033

Edit: There is a high likelihood that the drive's preamp has been damaged.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Seagate ST1000DX001 - DEAD/no signs of life
PostPosted: May 21st, 2017, 20:39 
Offline
User avatar

Joined: April 3rd, 2011, 0:19
Posts: 2003
Location: Providence, RI
fzabkar wrote:
Mixing cables between modular PSUs often results in 12V being impressed on the 5V supply. I would expect that the 5V TVS diode (D3) will be shorted, and its associated zero-ohm resistor (R67) open.

Catastrophic failures in Western Digital PCBs:
http://www.hddoracle.com/viewtopic.php?f=59&t=1119&p=5033

Edit: There is a high likelihood that the drive's preamp has been damaged.


I think you're referring to his other case he posted with the Seagate drive. This one, while it might have blown TVS, clearly has a blown motor control chip. PCB replacing time :D

_________________
Data Medics - Hard Drive, SSD, and RAID Data Recovery Service Company


Top
 Profile  
 
 Post subject: Re: Seagate ST1000DX001 - DEAD/no signs of life
PostPosted: May 21st, 2017, 22:02 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
data-medics wrote:
fzabkar wrote:
Mixing cables between modular PSUs often results in 12V being impressed on the 5V supply. I would expect that the 5V TVS diode (D3) will be shorted, and its associated zero-ohm resistor (R67) open.

Catastrophic failures in Western Digital PCBs:
http://www.hddoracle.com/viewtopic.php?f=59&t=1119&p=5033

Edit: There is a high likelihood that the drive's preamp has been damaged.


I think you're referring to his other case he posted with the Seagate drive. This one, while it might have blown TVS, clearly has a blown motor control chip. PCB replacing time :D

I am fully aware of the situation. It appears that both drives experienced an overvoltage on the 5V supply. The Seagate HDD most probably survived (apart from the diode and resistors), but the WD drive most probably sustained a damaged preamp in addition to the obviously damaged motor controller. If D3 and R67 are damaged, then this would be good reason to be concerned for the preamp.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Seagate ST1000DX001 - DEAD/no signs of life
PostPosted: May 22nd, 2017, 10:19 
Offline
User avatar

Joined: May 21st, 2017, 10:42
Posts: 18
Location: Bristol, UK
fzabkar wrote:
data-medics wrote:
fzabkar wrote:
Mixing cables between modular PSUs often results in 12V being impressed on the 5V supply. I would expect that the 5V TVS diode (D3) will be shorted, and its associated zero-ohm resistor (R67) open.

Catastrophic failures in Western Digital PCBs:
http://www.hddoracle.com/viewtopic.php?f=59&t=1119&p=5033

Edit: There is a high likelihood that the drive's preamp has been damaged.


I think you're referring to his other case he posted with the Seagate drive. This one, while it might have blown TVS, clearly has a blown motor control chip. PCB replacing time :D

I am fully aware of the situation. It appears that both drives experienced an overvoltage on the 5V supply. The Seagate HDD most probably survived (apart from the diode and resistors), but the WD drive most probably sustained a damaged preamp in addition to the obviously damaged motor controller. If D3 and R67 are damaged, then this would be good reason to be concerned for the preamp.


[5V rail] - Diode D3 has continuity and 00.4 ohms resistance in either direction. Resistor R67 has continuity (closed circuit).

[12V rail] - Diode ? - no continuity in either direction. The DMM in diode/continuity mode shows ~1500 when +ve is on the cathode and ~545 when +ve is on the anode. Resistor R64 has continuity (closed circuit).

U1 is obvious damaged.

So... do either of the diodes need to be replaced, as well as U1?

Thanks


Top
 Profile  
 
 Post subject: Re: Western Digital WD10EARS-00VWB0 - DEAD/no signs of life
PostPosted: May 22nd, 2017, 16:23 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15461
Location: Australia
The fact that R67 is intact is a good sign. This means that the preamp may have survived. As Data-Medics has already stated, it would be far easier to replace the PCB and transfer the 8-pin serial flash memory IC at U12 from patient to donor. Some PCB suppliers (eg hdd-parts.com) offer a free transfer service.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: Google [Bot], ludespeedny, sourcerer and 61 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group