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 Post subject: Re: Dead Kingston M.2
PostPosted: January 27th, 2018, 22:05 
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I wonder what this location connects to:

Attachment:
F1.jpg
F1.jpg [ 99.8 KiB | Viewed 360 times ]

In similar designs I have seen it labelled as "F1" which suggests that it is intended for a fuse. Could one side be connected to +3.3V (pin #74) and the other to the Vcc pins of the regulators?

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 Post subject: Re: Dead Kingston M.2
PostPosted: January 30th, 2018, 16:31 
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Joined: February 15th, 2017, 15:42
Posts: 53
Location: Sweden
fzabkar wrote:
I think we are very close to a solution.

Pin #38 would be directly connected to power pin P3 (+3.3V) of your SATA cable. If you short this pin to ground, without doing anything else, then you will be shorting your SATA power source. Instead I would flow a blob of solder between pins 2 & 3 of C35.

I'll post a diagram of this area of the circuit shortly.


Thanks allot! It did power on as you said!
Now Im facing a whole different issue, it present itself as 2MB.
Managed to start a clone, but I got only 2MB... :(


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 Post subject: Re: Dead Kingston M.2
PostPosted: January 30th, 2018, 16:39 
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Did you check the outputs of each regulator? Could a missing supply voltage for the NANDs be responsible for the 2MB fault?

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 Post subject: Re: Dead Kingston M.2
PostPosted: January 30th, 2018, 16:43 
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Location: Sweden
fzabkar wrote:
I wonder what this location connects to:

Attachment:
The attachment F1.jpg is no longer available

In similar designs I have seen it labelled as "F1" which suggests that it is intended for a fuse. Could one side be connected to +3.3V (pin #74) and the other to the Vcc pins of the regulators?


Correct again! :)


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fza.png
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 Post subject: Re: Dead Kingston M.2
PostPosted: January 30th, 2018, 17:03 
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Joined: February 15th, 2017, 15:42
Posts: 53
Location: Sweden
fzabkar wrote:
Did you check the outputs of each regulator? Could a missing supply voltage for the NANDs be responsible for the 2MB fault?


I checked them all, but the outputs of the regulators are the same. The inductors are showing different voltages tough.

1
pin1 - 0V
pin2 - 3.3V
pin3 - 2.3V
pin4 - 1.3V
pin5 - GND
pin6 - 0.59V

2
pin1 - 0V
pin2 - 3.3V
pin3 - 3.3V
pin4 - 1.5V
pin5 - GND
pin6 - 0.6V

3
pin1 - 0V
pin2 - 3.3V
pin3 - 3.3V
pin4 - 1.84V
pin5 - GND
pin6 - 0.6V

4
1,84V both sides

5
1.5V both sides

6
1.26V both sides


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Foto 2018-01-30 21 44 23.png
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 Post subject: Re: Dead Kingston M.2
PostPosted: January 30th, 2018, 17:26 
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Posts: 10068
Location: Australia
It appears that Vcore = 1.26V (flash controller), Vio = 1.5V (for SDRAM), and 1.8V is the NAND supply. Therefore, ISTM there is a firmware problem. :-(

NT5CC128M16FP-D1, Nanya, DDR3 SDRAM, 2Gbit 128Mx16, 1.35V, 96-Pin TFBGA:
http://www.wasuntech.com/upload/2017-06/21/20150602113343_5361.pdf

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 Post subject: Re: Dead Kingston M.2
PostPosted: January 30th, 2018, 17:48 
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Posts: 53
Location: Sweden
Oh crap..
Well fazbkar, your solved the circuit issue, many thanks for that!
Bad end though :cry:

Of topic, very soon you make your 10k post, gz! :)


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 Post subject: Re: Dead Kingston M.2
PostPosted: January 30th, 2018, 18:05 
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Location: Australia
In retrospect it would have been easier to run a bridge between the pads of "F1". That would have bypassed the DEVSLP circuit.

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 Post subject: Re: Dead Kingston M.2
PostPosted: Yesterday, 19:24 
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It doesn't help you, but I think I have identified the "VLAN" part:

CAT809, ON Semiconductor, 3-Pin Power Supply Supervisor, marking VLAx, SOT-23:
https://www.onsemi.com/pub/Collateral/CAT809-D.PDF
http://chip.tomsk.ru/chip/chipfile6-x.nsf/all/47257B54001189E247257AF200318604/$File/CAT803-D.PDF

The stupid thing is that "VLA" is used by 16 CAT809 parts, each with a different threshold voltage. Even sillier, the "N" is a month code.

Quote:
Threshold and full part numbers will be provided on box and reel labels as well as all Shipping documents

So it would appear that ON Semiconductor believes that marking the part with its month of manufacture is more important than identifying what it is.

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