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 Post subject: Intel X25-M SSD 160 GB burned.
PostPosted: March 27th, 2011, 18:27 
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Hello everyone.

I burned my Intel SSD, more precisely component number U14 and U28. Look at this pictures:

http://img845.imageshack.us/img845/3682/aimg5446.jpg
http://img856.imageshack.us/img856/3374/aimg5446pp.jpg

http://img826.imageshack.us/img826/6439/aimg5448.jpg
http://img813.imageshack.us/img813/4271/aimg5448pp.jpg


Tell me all you know: which kind of component are these, do you think it is possible to swap them, has something similar happened to you already...

Sorry for my English and thank you very much.


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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 28th, 2011, 3:22 
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U14 appears to be part of a DC-DC converter. As there appears to be no discrete Schottky diode or MOSFET chopper in the vicinity, I expect that the IC is either a FETKY (MOSFET + diode), or a PWM controller and FETKY in one package.

Could you show us a close-up photo of the two similar U14 devices at the opposite edge of the PCB?

As for U28, it would help if you could at least find which pin is the ground and which is the supply. Perhaps it would help if we could see the chip in the context of the whole board.

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 28th, 2011, 15:12 
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fzabkar wrote:
As for U28, it would help if you could at least find which pin is the ground and which is the supply.

I have no idea.

I uploaded two high-resolution pictures where you can see the whole PCB.

Image
Image


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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 28th, 2011, 18:49 
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U15 is a TPS62290 PWM DC-DC converter. I expect that U14 would be the same.

TPS62290, Texas Instruments, adjustable 1-A Step Down Converter in 2 x 2 SON Package, marking BYN:
http://focus.ti.com/lit/ds/symlink/tps62290.pdf

Curiously, U11 is vacant even though its support components are present. However, the other side of the board has U28 directly beneath it. I'm wondering whether the PCB design allows for either U11 or U28 to fill the role of PWM DC-DC converter for that particular supply rail. In other words, perhaps U28 is performing the function of the missing chip at U11. Therefore I'm wondering whether you could remove U28 and replace it with a TPS62290 at location U11.

Having said that, it would be a good idea to find out which chips are connected to each DC-DC converter. This could be determined by testing for continuity between each of the 1R5 coils and the supply pins of the various chips. You can refer to the datasheets for the pinouts.

IS42S16160D-7TLI, ISSI, 8M x 8 x 4 Banks, 4M x 16 x 4 Banks, 256-Mbit SDRAM, 3.3V:
http://www.issi.com/pdf/42S83200D-16160D.pdf

W25X40LNEG, Winbond, 4Mbit, 2.3V - 3.6V serial flash memory with 4KB sectors and dual output SPI:
http://www.winbond-usa.com/products/Nex ... L_80Ld.pdf

W25X20ALNIG, Winbond, 2M-bit, 2.3V - 3.6V serial flash memory with 4KB sectors and dual output SPI:
http://www.datasheetarchive.com/pdf/get ... .pdf&scan=

BTW, it's not a good idea to have your board sitting on carpet. There is the risk of ESD damage.

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 28th, 2011, 19:07 
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I haven't yet found a datasheet for the 29F16B08JAMD1, Intel, 8GB NAND Flash chips, but I suspect that capacitors C60 - C66 (and others) are the supply bypass capacitors at the centre pins of each chip. Therefore, I expect that one end of each capacitor would be grounded while the other end would be connected to the supply for that flash IC.

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 28th, 2011, 19:30 
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Thank you. Your information is very helpful.
So, let's see if I understood right: those group of components (PS62290 + capacitors + inductor + resistors) are supplying some chips with energy, and those chips could be every chip on the board: NAND Flash, RAM, ... am I right?
And to see what is connected to what, I just have to watch at the light green lines? Is this always possible, or some connections are invisible because located on an inner PCB layer?

Now I can't see nothing because it's night and I'm going to sleep. We live on the opposite side of the world, here it's 1:23 in the night.

BTW, that isn't a carpet, but a cotton bath tower leaned against my monitor. The SSD is actually standing vertically (I know this doesn't make a difference for ESD, I'm just saying).

I just noticed before submitting: the NAND flash chips are 16 GB.

EDIT: maybe it could help you to know that the NAND flash is not made by Intel alone, but form IMFT, that is Intel Micron Flash Technology. Those numbers (29F16...) looks very similar to Micron numbers. http://micron.com/support/png.html?doma ... ng%20Guide


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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 28th, 2011, 23:17 
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fzabkar wrote:
29F16B08JAMD1, Intel, 8GB NAND Flash

Sorry, that should be 16GB, not 8GB.

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 29th, 2011, 4:11 
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fzabkar wrote:
I'm wondering whether the PCB design allows for either U11 or U28 to fill the role of PWM DC-DC converter for that particular supply rail. In other words, perhaps U28 is performing the function of the missing chip at U11. Therefore I'm wondering whether you could remove U28 and replace it with a TPS62290 at location U11.

U28 appears to be a fixed voltage converter whereas the TPS62290 is adjustable. The output voltage for the latter is set by two feedback resistors, R5 and R8. If you can't identify U28, and you wish to install a TPS62290 at U11, then you will also need to install a 22pF ceramic capacitor at C30 and a resistor at R8.

The output voltage is calculated according to the formula ...

Vout = Vref x (1 + R5/R8)

... where Vref = 0.6V.

So choose a value for R8 that provides the desired output voltage.

Alternatively, there are fixed 1.8V (TPS62293) and 3.3V (TPS62291) versions of the TPS62290 which could be installed at U11, if applicable. If using one of these, then you may need to flow a blob of solder over feedback resistor R5.

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 29th, 2011, 12:34 
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Bep, a little . . . a lot off topic, but what camera/lens are you using to get these pictures?

Dave



BEP wrote:
Hello everyone.

I burned my Intel SSD, more precisely component number U14 and U28. Look at this pictures:

http://img845.imageshack.us/img845/3682/aimg5446.jpg
http://img856.imageshack.us/img856/3374/aimg5446pp.jpg

http://img826.imageshack.us/img826/6439/aimg5448.jpg
http://img813.imageshack.us/img813/4271/aimg5448pp.jpg


Tell me all you know: which kind of component are these, do you think it is possible to swap them, has something similar happened to you already...

Sorry for my English and thank you very much.


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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 29th, 2011, 23:24 
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BTW, Micron's MT29F16G08FAA (16Gbits x 8) NAND Flash may have a similar pinout to the Intel chips. See page 9 of the following PDF.

MT29F4G08AAA, MT29F8G08BAA, MT29F8G08DAA, MT29F16G08FAA, NAND Flash Memory, 3.3V, Micron Technology:
http://download.micron.com/pdf/datashee ... d_m40a.pdf

The power pins (Vcc) are 12 and 37, and the grounds are at pins 13 and 36.

The TPS6229x parts are available from Mouser and Digikey in single quantities for around US$4.

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 30th, 2011, 0:14 
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fzabkar wrote:
U28 appears to be a fixed voltage converter whereas the TPS62290 is adjustable. The output voltage for the latter is set by two feedback resistors, R5 and R8.

I'm now wondering if R5 is a zero-ohm link, in which case U11 would already be wired for the fixed version of the IC rather than the adjustable version.

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 30th, 2011, 5:04 
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Sorry, your post appears to have been held up. :?

BEP wrote:
So, let's see if I understood right: those group of components (PS62290 + capacitors + inductor + resistors) are supplying some chips with energy, and those chips could be every chip on the board: NAND Flash, RAM, ... am I right?

Yes.

BEP wrote:
And to see what is connected to what, I just have to watch at the light green lines?

With respect, I think you may need outside help. :-)

Anyway, you need to measure the resistance between the inductors and the power pins of the SDRAM, NAND flash chip, and serial flash memory. This will tell you which power supply is powering each device.

Furthermore, I can't see any markings on any of the resistors, but it would help to know the markings on R9 and R10 (near U14), R5 (near U11), R16 and R19 (near U15), and maybe R37 near U28. These will be the feedback resistors that determine the output voltage of each DC-DC converter.

BEP wrote:
EDIT: maybe it could help you to know that the NAND flash is not made by Intel alone, but form IMFT, that is Intel Micron Flash Technology. Those numbers (29F16...) looks very similar to Micron numbers. http://micron.com/support/png.html?doma ... ng%20Guide

Thanks. I had already found a similarly numbered Micron part, but your link is still helpful. That said, I'm not sure just how much you can rely on the part numbers being similar, though.

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 30th, 2011, 6:19 
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fzabkar wrote:
With respect, I think you may need outside help. :-)

With respect, what did you think I am here for? :-)


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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 30th, 2011, 9:07 
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I you mean that I may need help for soldering and such things, of course I do. But this won't be a problem.


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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 30th, 2011, 12:13 
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I mean "If you mean...". Why isn't there an "edit" button?

Anyway, look at this picture: this is as close as I can. The resistors aren't marked. They are very tiny, something like 1 mm x 0.7 mm. Image

Image

(Camera is Canon EOS 550D/Rebel T2i).


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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 30th, 2011, 17:40 
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BEP, I meant that you will need to be able to perform some simple measurements with a multimeter. This will usually be easier than tracing the circuit by eye.

If you are not comfortable with a DMM, then this tutorial should help you:
http://www.ladyada.net/learn/multimeter/resistance.html

Read "Example 1. Testing a resistor".

As you say, the resistors aren't marked. :-( Measuring them in-circuit will probably give misleading results. Could you measure their resistances anyway?

Could you also measure the resistance between ground and each of the 1R5 coils? Use the 200 ohms range of your meter. This will check whether any of the loads are shorted, assuming that the power ICs aren't themselves shorted to ground.

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 31st, 2011, 4:24 
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I'll buy a multimeter. Could you help me choosing one? What about DT830B? Ore one of these (see picture)?

Image

This question may sound dumb for you, but I really have no experience in this things: where is the ground?

Thank you for your patience.


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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 31st, 2011, 7:49 
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I found these hi-res photos:
http://www.storagereview.com/images/int ... bottom.jpg
http://www.storagereview.com/images/int ... %20top.jpg

The marking code for U28 looks like "QKS", but I'm not certain. The pinout appears to match the following part:

MIC23150 4MHz PWM 2A Buck Regulator with HyperLight Load:
http://www.micrel.com/_PDF/mic23150.pdf

Here are the output voltage variations:

MIC23150-SYMT, marking QKS, 3.3V
MIC23150-GYMT, marking QKG, 1.8V
MIC23150-55YMT, marking QKZ, 1.35V
MIC23150-4YMT, marking QK4, 1.2V
MIC23150-CYMT, marking QKC, 1.0V

Pinout:
Code:
SW  1  8 PGND
SW  2  7 VIN
EN  3  6 VIN
SNS 4  5 AGND

The above components are available from Digikey for US$1.

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: March 31st, 2011, 16:41 
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Any cheap digital multimeter will suffice. The DT830B is perfect.

http://www.hobby-hour.com/electronics/d ... imeter.php
http://i1.lelong.com.my/Malaysia/-0903- ... u77@13.jpg

The ground pins can be accessed at the SATA power connector:
http://pinouts.ru/Power/sata-power_pinout.shtml

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 Post subject: Re: Intel X25-M SSD 160 GB burned.
PostPosted: April 4th, 2011, 14:14 
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@BEP

How did the original problem start (the cause) and what is the current status of the repair attempt , if possible?


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