All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 22 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: Wrong voltage - what to check for?
PostPosted: July 14th, 2021, 16:36 
Offline

Joined: July 13th, 2021, 13:48
Posts: 8
Location: Denmark
Hello,

So, a few days ago I figured I didn't need all those drive in my computer and might as well just short them out by using the wrong cable in my modular PSU (yes, the gift that keeps on giving). I managed to kill no less than 5 HDDs and 2 SSD, so I'm very proud of myself.. But anyway, jokes aside, I'm hoping to be able to fix some, if not all, of the drives.

I'm starting with the two Seagate Ironwolf 12TB. Seagate didn't write any designators on the PCB, but I believe I managed to locate the two "protective" diodes - marked D1 and D2 for a lack of correct names. For both PCBs, when I try to test D1 it just gives a *beep* sound on the multimeter, which I understand means it's shorted. The D2 (on both PCBs) shows 0.136V DC and "OL" when I switch the probes. Does that mean D2 is still working?

Can I just remove the D1 and see if it spins up? Are the other checks I should do first? Also, can I replace D1? At my former work the electronic department had access to some fancy soldering equipment, so I could can probably give them a visit and get some help with that part..

Image


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 15th, 2021, 12:00 
Offline

Joined: November 7th, 2020, 5:31
Posts: 1084
Location: The_UK
If its beeping with the probe in both directions it's become a wire. You can clip it off.

Before connecting it make 100% sure you have fixed the cable problem, and you should be able to test. If you're lucky you will have data access if you're not you wont. If you're leaving it in service it should really be replaced.

Your picture hasn't posted. Get a picture beforehand so you can read the markings and we can check to see if the magic smoke has been let out from anything else.

_________________
Data Recovery Services in the UK.
https://www.usbrecovery.co.uk/


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 15th, 2021, 13:10 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
http://www.shenobi.dk/hdd/PCB-IronWolf-2.jpg

Don't touch those diodes. D1 appears to be part of a backup supply (for power loss data protection), and D2 appears to be part of a switchmode supply, possibly for the -5V preamp supply rail.

This PCB has two e-fuses. These are the 10-pin ICs near the SATA power connector. If you can post a better photo of this area, I can show you what to check.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 15th, 2021, 14:38 
Offline

Joined: November 7th, 2020, 5:31
Posts: 1084
Location: The_UK
Crap. I'd not seen the board, my bad :oops: I'll go and sit in a corner facing the wall for a while. :cry:

_________________
Data Recovery Services in the UK.
https://www.usbrecovery.co.uk/


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 15th, 2021, 14:39 
Offline

Joined: July 13th, 2021, 13:48
Posts: 8
Location: Denmark
fzabkar wrote:
This PCB has two e-fuses. These are the 10-pin ICs near the SATA power connector. If you can post a better photo of this area, I can show you what to check.


https://www.shenobi.dk/hdd/PCB-IronWolf-3.jpg

Will this do?


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 15th, 2021, 14:41 
Offline

Joined: July 13th, 2021, 13:48
Posts: 8
Location: Denmark
Lardman wrote:
Crap. I'd not seen the board, my bad :oops: I'll go and sit in a corner facing the wall for a while. :cry:


Not to worry, no Diodes were harmed :wink: (well, maybe by the wrong voltage but..)


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 16th, 2021, 14:11 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
These are my guesses for the test points:

Attachment:
e-fuses.jpg
e-fuses.jpg [ 97.91 KiB | Viewed 14812 times ]


Can you measure +5Vout and +12Vout?

I can't see the markings on the ICs. Can you tell us what they are?

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 16th, 2021, 16:26 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
NIS5232, ON Semiconductor, electronic fuse, 12V, 4.2A, marking 232, DFN10:
https://www.onsemi.com/pdf/datasheet/nis5232-d.pdf

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 17th, 2021, 1:11 
Offline
User avatar

Joined: August 15th, 2006, 3:01
Posts: 3464
Location: CDRLabs @ Chandigarh [ India ]
fzabkar wrote:
NIS5232, ON Semiconductor, electronic fuse, 12V, 4.2A, marking 232, DFN10:
https://www.onsemi.com/pdf/datasheet/nis5232-d.pdf


Wow ,
What are they heading to from simple effective designs to such kinda designs ...

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


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 17th, 2021, 3:09 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
E-fuses have been around for years. In fact some very old Samsung HDD PCBs had an unpopulated location reserved for these components.

The latest HDDs now have a dual e-fuse (12V & 5V) in one 8-pin IC, something like these:

https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP5094/document_id/4894/
https://www.st.com/resource/en/datasheet/stef512gr.pdf

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 17th, 2021, 5:38 
Offline

Joined: July 13th, 2021, 13:48
Posts: 8
Location: Denmark
So, while I try to fiddle around with the Seagate HDD PCBs, I also have a Western Digital Purple drive that "died". This one I hope is an easy fix.

The 4 diodes on the picture are all ok. I assume the components between the +5Vin and +12Vin in are fuses. The +12V is fine, it measure 0.4 Ohm and connection through when I try to "beep" it. The +5Vin fuse shows as an open circuit, so I guess it did its job and protected the diodes / rest of the PCB.

Would I be correct in assuming that if I do a Klondike Fix, I just bypass the fuse by soldeting a wire in instead of the fuse? And if I want to do a real fix, I replace the fuse? (any suggestion with what?)

http://www.shenobi.dk/hdd/WD-purple-2.jpg

And, just in case you need a picture without my boxes:
http://www.shenobi.dk/hdd/WD-purple-1.jpg


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 17th, 2021, 7:46 
Offline

Joined: July 13th, 2021, 13:48
Posts: 8
Location: Denmark
fzabkar wrote:
Can you measure +5Vout and +12Vout?

I can't see the markings on the ICs. Can you tell us what they are?


So I have 2 PCBs for the Seagate drives, clearly made by different manufactors but same revision. (probably 2nd source).

1st PCB:

+5V IC - AMAM 099 - from what I can make out
+12V IC - 232 RNL
http://www.shenobi.dk/hdd/PCB-IronWolf-4.jpg

I can't measure the +12Vout because my probes are too thick to get to the pins
Between +5Vout and GND - around 44Kohm. It keeps rising the longer I measure. +5Vin and +5Vout 44Kohm, again, it keeps rising the longer I measure.

2st PCB:

+5V IC - J9 0mS 5-something-0
+12V IC - ADTM 564
http://www.shenobi.dk/hdd/PCB-IronWolf-5.jpg

Between +5Vout and GND - 34.6Kohm. +5Vin and +5Vout 32.5Kohm.


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 17th, 2021, 13:55 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
You can flow a blob of solder over the fuse, if there are no other faults.

If you want to replace the fuse ...

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

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 17th, 2021, 13:56 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
fzabkar wrote:
E-fuses have been around for years. In fact some very old Samsung HDD PCBs had an unpopulated location reserved for these components.

The latest HDDs now have a dual e-fuse (12V & 5V) in one 8-pin IC, something like these:

https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP5094/document_id/4894/
https://www.st.com/resource/en/datasheet/stef512gr.pdf

Speak of the devil ...

https://forum.hddguru.com/viewtopic.php?f=1&t=41501

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 18th, 2021, 13:32 
Offline

Joined: July 13th, 2021, 13:48
Posts: 8
Location: Denmark
fzabkar wrote:
You can flow a blob of solder over the fuse, if there are no other faults.

If you want to replace the fuse ...

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


Thanks, I managed to fix 3 of my drives today. For the WD Purple, I just needed to "short" the fuse, no faulty diodes and no shorts between +5V/+12V and GND.

For my two Seagate Barracuda, I just had to "short" the fuse, remove the +5V STV diode, after that there was no short between the +5V/+12V and GND. Both drive spun up and all data was intact. Do you by any chance know which TVS diode can be used as a replacement?

http://www.shenobi.dk/hdd/PCB-Barracuda-1.jpg

I'll order some of those SMD fuses. :good:


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 18th, 2021, 13:39 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
MagicByte wrote:
For my two Seagate Barracuda, I just had to "short" the fuse, remove the +5V STV diode, after that there was no short between the +5V/+12V and GND. Both drive spun up and all data was intact. Do you by any chance know which TVS diode can be used as a replacement?

http://www.shenobi.dk/hdd/PCB-Barracuda-1.jpg

SMAJ5.0A or SMBJ5.0A would be suitable replacements for the 5V TVS diode, but you should confirm their dimensions (SMBJ is physically larger).

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 18th, 2021, 13:59 
Offline
User avatar

Joined: September 8th, 2009, 18:21
Posts: 15463
Location: Australia
MagicByte wrote:
fzabkar wrote:
Can you measure +5Vout and +12Vout?

I can't see the markings on the ICs. Can you tell us what they are?


So I have 2 PCBs for the Seagate drives, clearly made by different manufactors but same revision. (probably 2nd source).

1st PCB:

+5V IC - AMAM 099 - from what I can make out
+12V IC - 232 RNL
http://www.shenobi.dk/hdd/PCB-IronWolf-4.jpg

I can't measure the +12Vout because my probes are too thick to get to the pins
Between +5Vout and GND - around 44Kohm. It keeps rising the longer I measure. +5Vin and +5Vout 44Kohm, again, it keeps rising the longer I measure.

2st PCB:

+5V IC - J9 0mS 5-something-0
+12V IC - ADTM 564
http://www.shenobi.dk/hdd/PCB-IronWolf-5.jpg

Between +5Vout and GND - 34.6Kohm. +5Vin and +5Vout 32.5Kohm.

MP5000S, Monolithic Power, 12V, 1A - 5A Programmable Current Limit Switch, marking ADT, QFN10:
https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP5000S/document_id/1651/

MP5018, Monolithic Power, 5V, 1A-5A Current Limit Switch, marking AMAy, QFN12:
https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP5018/

Can you tape a sewing needle to the probe tip? Then measure the output voltages of each e-fuse using a screw hole as your ground.

_________________
A backup a day keeps DR away.


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 19th, 2021, 4:46 
Offline

Joined: November 7th, 2020, 5:31
Posts: 1084
Location: The_UK
MagicByte wrote:
Thanks, I managed to fix 3 of my drives today.
That's 3 more than I did :D Feels good doesn't it, hopefully the SSD's will be as straightforward.

_________________
Data Recovery Services in the UK.
https://www.usbrecovery.co.uk/


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 19th, 2021, 9:36 
Offline
User avatar

Joined: August 15th, 2006, 3:01
Posts: 3464
Location: CDRLabs @ Chandigarh [ India ]
fzabkar wrote:
E-fuses have been around for years. In fact some very old Samsung HDD PCBs had an unpopulated location reserved for these components.

The latest HDDs now have a dual e-fuse (12V & 5V) in one 8-pin IC, something like these:

https://www.monolithicpower.com/en/documentview/productdocument/index/version/2/document_type/Datasheet/lang/en/sku/MP5094/document_id/4894/
https://www.st.com/resource/en/datasheet/stef512gr.pdf


Well,
Whats the advantage ,These are not even resettable types ,The older design was effective other then the ZERO ohm resistance placement after TVS instead of Before it

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


Top
 Profile  
 
 Post subject: Re: Wrong voltage - what to check for?
PostPosted: July 27th, 2021, 5:07 
Offline

Joined: July 13th, 2021, 13:48
Posts: 8
Location: Denmark
Lardman wrote:
MagicByte wrote:
Thanks, I managed to fix 3 of my drives today.
That's 3 more than I did :D Feels good doesn't it, hopefully the SSD's will be as straightforward.


Yeah, I'm all happy about that. :) Though, I didn't consider reparing the SSD's due to the very burnt electronic smell coming from them. Maybe I should have. Anyway, they were just small 110GB-ish boot drives.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 22 posts ]  Go to page 1, 2  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: Google [Bot], Google Adsense [Bot] and 48 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