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 Post subject: mSata ssd Sandsik Ultra II burned. Need help
PostPosted: March 9th, 2017, 7:28 
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Joined: March 9th, 2017, 6:59
Posts: 2
Location: France
I've read couple of topics and found here realy helpful guys. So what about my case. mSATA ssd Sandsik Ultra II was working properly in Dell laptop. And someday i got corruption with FileSystem and blue screen of death. We decided to remoove ssd out and connect through adaptor,and read it dirrectly on regular desktop pc. Once we connected we saw some small smoke came , for a second, out from ssd. Later on , i found that ssd works only with 3,3V and 1,7V adaptopr. Our adaptor SATA-mSata has 5V and 3,3V only.
Now i would be preciated in any help to find culprit elements on it and make it physically work again. I have multimeter with me, a little computer dead staff for the donor elements, and some basic knowlege in electronics . Here is pictures i got with my smartphone.


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 Post subject: Re: mSata ssd Sandsik Ultra II burned. Need help
PostPosted: March 9th, 2017, 14:49 
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Joined: September 8th, 2009, 18:21
Posts: 9778
Location: Australia
WD's datasheet is essentially useless ...

SanDisk Ultra II mSATA SSD datasheet:
http://downloads.sandisk.com/downloads/qsg/ultraii-msata-ssd-datasheet.pdf

Here is a photo from the above document:
Attachment:
PCB_bot_WD_datasheet.jpg
PCB_bot_WD_datasheet.jpg [ 553.64 KiB | Viewed 982 times ]

Two of the three "A" coils appear to be fractured. :-)))

Here is the pinout for a standard card:

MiniCard For NoteBook Computers (Pinout):
http://www.interfacebus.com/Mini_PCI_Express_Bus.html#b

The odd numbered pins from 37 to 51 are reserved. In your case pins 39 & 41 appear to be assigned as power pins.

I would begin by identifying the power and ground pins on your adapter. I would also identify the power and ground pins at Dell's connector.

Your photos are incomplete. There is an additional switchmode supply at the other end of the PCB, behind the two NANDs. The good thing about the PCB layout is that the voltage test points appear to be marked with white circles. It would help immensely if you could identify the markings on all the ICs. In particular, the 16-pin IC near the NANDs appears to have a burn mark on it.

Alex13 wrote:
... a little computer dead staff for the donor elements ...

Man, that's a brutal work environment. :-)

_________________
A backup a day keeps DR away.


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 Post subject: Re: mSata ssd Sandsik Ultra II burned. Need help
PostPosted: March 9th, 2017, 16:19 
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Joined: March 9th, 2017, 6:59
Posts: 2
Location: France
fzabkar wrote:
WD's datasheet is essentially useless ...

SanDisk Ultra II mSATA SSD datasheet:
http://downloads.sandisk.com/downloads/qsg/ultraii-msata-ssd-datasheet.pdf

Here is a photo from the above document:
Attachment:
The attachment PCB_bot_WD_datasheet.jpg is no longer available

Two of the three "A" coils appear to be fractured. :-)))

Here is the pinout for a standard card:

MiniCard For NoteBook Computers (Pinout):
http://www.interfacebus.com/Mini_PCI_Express_Bus.html#b

The odd numbered pins from 37 to 51 are reserved. In your case pins 39 & 41 appear to be assigned as power pins.

I would begin by identifying the power and ground pins on your adapter. I would also identify the power and ground pins at Dell's connector.

Your photos are incomplete. There is an additional switchmode supply at the other end of the PCB, behind the two NANDs. The good thing about the PCB layout is that the voltage test points appear to be marked with white circles. It would help immensely if you could identify the markings on all the ICs. In particular, the 16-pin IC near the NANDs appears to have a burn mark on it.

Alex13 wrote:
... a little computer dead staff for the donor elements ...

Man, that's a brutal work environment. :-)


Hello mr.fzabkar , i was really hoping for your answer :beer: . Here is more complete pictures.
>I would begin by identifying the power and ground pins on your adapter. I would also identify the power and ground pins at Dell's connector.
Going to do that thnaks for advice.


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msata1_1.jpg
msata1_1.jpg [ 109.45 KiB | Viewed 951 times ]
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 Post subject: Re: mSata ssd Sandsik Ultra II burned. Need help
PostPosted: March 10th, 2017, 16:16 
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Joined: September 8th, 2009, 18:21
Posts: 9778
Location: Australia
I can see 3 switchmode regulators, a TVS diode, and what looks to be a power MOSFET. If I were doing this job, I would identify all the IC markings and then determine which of them are connected to the supply pins of the card. However, I would first verify the pinout of the connectors of both the Dell machine and the adapter. A photo of the adapter would help, too.

_________________
A backup a day keeps DR away.


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 Post subject: Re: mSata ssd Sandsik Ultra II burned. Need help
PostPosted: March 10th, 2017, 17:32 
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Joined: September 8th, 2009, 18:21
Posts: 9778
Location: Australia
Pages 20 & 21 of the following document list the interface pinout for an mSATA SSD:
http://www.vikingtechnology.com/uploads/msata_datasheet.pdf

Some pins are vendor specific. Only the +3.3V supply pins are connected. I expect that the SanDisk SSD would have a similar arrangement, but one can't be certain.

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A backup a day keeps DR away.


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