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 Post subject: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 20th, 2018, 6:23 
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Joined: October 20th, 2018, 6:05
Posts: 7
Location: Bulgaria
Hello all,

I did something stupid in my hurry and i killed a working laptop hard drive by swapping accidentally the 12V and 5V power lines. So after that the spindle doesn't rotate, but clicking sounds (from the heads?) can be heard when I move my ear to the HDD. I gently unscrewed the PCB and i saw that underneath it there is something silky soft, between the HDD casing and PCB. So I've inspected the PCB for some burns and fries, but I didn't see anything of this (like burns on didodes, capacitors or resistors), just a small black dot (unevenly aligned) on the WD NAUTILUS chip, which during my research i found out that it is a motor control chip. PCB Board rev. A (2060-771960-00) If you need more names and numbers/photos, tell me which.

So now the question of the year is... what next? Can it be resurrected, if so can it be done replacing TVS diodes and the WD NAUTILUS chip (i think i can find a donor), do I need a whole new PCB, like, do the other (RAM, ROM and Marvell controller) are also casualties if there was a 12V surge to the 5V lane?

Any material to read and opinions are welcome.


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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 20th, 2018, 12:30 
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Joined: October 20th, 2018, 6:05
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Please do not post me PMs, because i cannot answer yet...

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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 20th, 2018, 13:18 
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Joined: May 21st, 2007, 16:10
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Location: Gothenburg/ Sweden
If motor controller chip is burned it's better to find a new pcb and swap ic U12.

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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 20th, 2018, 13:58 
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Joined: October 20th, 2018, 6:05
Posts: 7
Location: Bulgaria
I could obtain a WD5000LPVX donor board, it looks pretty much like the one on WD10JPCX, but I need to inspect things closer.

What is the reason that only the motor control chip cannot be replaced without the rest of the electronics?


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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 20th, 2018, 14:58 
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Joined: December 5th, 2011, 5:38
Posts: 1170
Location: Italy
Replacing motor controller chip is much more though and it doesn't give you any assurance of getting a working PCB, because could be also other damaged components (mosfet, diodes, capacitors, etc).
It's much easier and secure to change pcb with a good working one and then swap the rom chip.
If you have tools as WDMarvel you can even adapt donor pcb without swapping rom physically


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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 20th, 2018, 15:48 
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Joined: September 8th, 2009, 18:21
Posts: 10948
Location: Australia
@vami, here is one supplier who includes a firmware transfer (U12) in the price:

https://www.onepcbsolution.com/529288153wd.html
https://sep.yimg.com/ay/yhst-44463692235217/771960-8.gif

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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 21st, 2018, 4:17 
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Joined: October 20th, 2018, 6:05
Posts: 7
Location: Bulgaria
Hello,

Quote:
Replacing motor controller chip is much more though and it doesn't give you any assurance of getting a working PCB, because could be also other damaged components (mosfet, diodes, capacitors, etc).

Taking a look to this TQFP-64 chip it isn't much of a hassle with a hot-air station to replace, i have already replaced several quad-packs on routers, motherboards, etc. As for the other components they seem fine on the board (no blacks, melts), what concerns me is if the RAM, Controller and EEPROM have survived, I do not know what is the circuit design to determine if they are "protected" by some circuitry before them. And how come if this IC is dead, can I guarantee that also the U12 25Cxxx isn't dead too (being also a 5V device)?

Quote:
@vami, here is one supplier who includes a firmware transfer (U12) in the price:

The drive & it's contents just doesn't worth that much; I've got the drive for 30 EUR and I'm not willing to invest more than 10 EUR to fix it, the data is of no importance (Linux distros installations) I just don't want to throw away a mechanically good drive. Perhaps I'll buy some donor with a good motor chip for few bucks and try to replace the motor controller, or in the trash can it goes...

Any insight on the circuit design and workings are welcome.


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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 21st, 2018, 17:31 
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Joined: September 8th, 2009, 18:21
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U12 is probably powered from a Vio supply of 3.3V or 2.5V. The motor controller combo chip also produces the Vcore and Vio supplies for the PCB. This chip incorporates the MOSFETs and diodes for these switchmode supplies, and it provides the PWM control. Inductors L2, L4 and L5 are the corresponding external passive elements.

For an insight into SMOOTH motor controller chips, see the L7250 datasheet.

Tutorial - Linear and Switchmode Regulators used in HDDs:
http://www.hddoracle.com/viewtopic.php?f=59&t=231

L7250, SMOOTH, spindle motor + VCM controller, ST Microelectronics:
http://pdf.datasheetcatalog.com/datasheet/SGSThomsonMicroelectronics/mXyuswx.pdf

Edit: You would need to confirm whether the preamp (on the headstack inside the HDA) is damaged. To this end I would locate the supply voltage test points at the HDA contacts (J1).

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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 26th, 2018, 7:43 
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Joined: October 20th, 2018, 6:05
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Location: Bulgaria
Hello,

Just wanted to make a progress report. I've bought a donor and swapped the ROM chip U12. The original board number is 2060-771960-000 Rev A and the donor is 2060-771959-000 Rev P. I've examined both boards, they're pretty much the same, several components aren't soldered, that IMHO don't actually interfere with the functionality (fuses and several passives).

So after the switch the hard drive spins up and there is a clicking sounds from the heads in an interval of around one sec, click, click (didn't count them but do not last long) and then it "enters" perhaps some kind of power down mode. Then it waits a while and spins up again, click click and gives up and repeat. The drive is detected by the OS but it cannot report anything. (size, partitions, heads cylinders)

As far as I've read in these forums this should indicate some mechanical problem, perhaps something related to the head assembly, as stated by fzabkar.

Since I do not have any special tools or other Ideas I'm gonna leave things for now such as they are, my post is for reference for those looking to handle things themselves. Hopefully they have more luck connecting Molex to SATA cables than me...

As always any comments and suggestions are very welcome.


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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 26th, 2018, 8:49 
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Joined: September 30th, 2005, 7:33
Posts: 617
WD5000LPVX board and WD10JPCX are not compatible....


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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 26th, 2018, 12:15 
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Joined: October 20th, 2018, 6:05
Posts: 7
Location: Bulgaria
Probably, it doesn't fit exactly mechanically, but cannot be sure without schematic.

Anyways couldn't find closest donor than this one.


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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 26th, 2018, 15:03 
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Joined: December 19th, 2006, 8:49
Posts: 9832
Location: Portugal
vami wrote:
Probably, it doesn't fit exactly mechanically, but cannot be sure without schematic.

Anyways couldn't find closest donor than this one.


PCBs are NOT COMPATIBLE and the drive will click, etc ...

You need 2060-771960-000 Rev A PCB !!!

I do have this one :

https://www.ebay.com/itm/Western-Digita ... 2833701105

Price is $5 USD + $10 USD shipping and i do offer the adaptation service for FREE.

If you want you can ship me the damaged PCB and i will copy the rom content to the new PCB. I will ship it to you (new PCB + original damaged PCB) and if the drive still clicks you will be 100% positive that heads / pre-amp are gone.

Alternative you can ship me the drive + PCB and i will test it out for you. If the drive does work with the new PCB you pay $15 on that auction and i will ship drive + new PCB + old PCB to you,

If the drive justs click i will ship you drive + original PCB and you do pay only $10 of shipping costs.

I'm based on Portugal - Europe so if you are on Bulgaria you don't have to worry about custom taxes.

Let me know if you are interested.

Regards.

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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 26th, 2018, 15:17 
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Joined: December 19th, 2006, 8:49
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Goes without saying you do need to send me the correct native ROM chip .... Either you put it back on the damaged PCB or you do send me the ROM chip alone without any PCB that will be OK as well ...

So either you would need to ship me FULL DRIVE + Original ROM chip or you would need to ship me the ROM chip itself so that i could programm the new PCB with the content of the native ROM ...

Also there are a faster alternative ... Just buy the PCB on the eBay link and you will get the 100% fully working PCB and you will be able to put the native ROM chip on it and try it yourself ...

Only advantage of shipping me the entire drive is that i can test it for firmware problems and other issues assuming that the drive will read anything at all (heads are not damaged) and you wll save $5 usd on a PCB that i can sell to someone else that needs it in case the drive have damaged heads and a PCB swap will not help ....

Also i don't do clean room work so if heads are gone or pre-amp are gone you will have to find someone else like member drHDD (that does clean room work very cheap) to do the head swap. I can only supply the PCB, fix the firmware, clone/image and extract data by hardware etc .... but i can't do anything if all the heads are gone or if the pre-amp are gone.

Regards.

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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 27th, 2018, 17:27 
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Joined: October 20th, 2018, 6:05
Posts: 7
Location: Bulgaria
Thank you for the replies, I'll think about it. Just don't have the time currently...


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 Post subject: Re: WD10JPCX-24UE4T0 overvoltage 12V instead of 5V
PostPosted: October 27th, 2018, 18:42 
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Joined: December 19th, 2006, 8:49
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Location: Portugal
Ok !
:D

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