Connected wrong power supply to 3TB WD My Book Essential - any way to fix it?

This is the model WDBACW0030HBK-00.  The sticker on PCB reads 4061-705089-001 Rev. AF.

this is the board:

I have read about other people with similar problem, but I couldn’t find the solution for this particular model.

As indicated, I have connected my 3TB WD HD to a 19v  PSU by mistake. I have read about the diodes and resistors that can blow but I am unsure which they are on this drive.  Any pointers on what can be done to fix the board would be appreciated. 

Thanks

Welcome to the Community.

If you do not have a backup of the data and need to recover it, then it would be best to consult a professional Data Recovery service.

http://support.wdc.com/recovery/index.asp?wdc_lang=en

With regards to repairs, there is an experienced Board Member named fzabkar who frequents the Desktop & Mobile Drives section. Hopefully he will be able to offer some guidance.

Check these posts  http://community.wd.com/t5/External-Drives-for-PC/Accidentally-connected-19v-supply-to-2TB-WD-Elements-and-now/td-p/834409  and  http://community.wd.com/t5/External-Drives-for-PC/Removed-D4-diode-1-0-TB-Caviar-Green-now-powers-up-but-not/m-p/836629#M22597 fzabkar is about the only one who understands these boards. You can alway send him a PM and ask him to lok at your post.

Joe

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thanks for the suggestions.  I’ve sent PM to fzabkar

one more question - would the PCB board from 2TB drive, or the 1TB drive work with 3TB drive?  In other words, since it seems easier to get a replacement board from 1TB or 2TB drive, are these two boards identical to the one used in 3TB drive?

@jmnkgra, have you checked D4 on the HDD PCB (not the USB-SATA PCB)?

Here is a typical WD bridge PCB:

Western Digital My Book Essential bridge PCB, 4061-705094:
http://www.alexsoft.org/viewtopic.php?f=112&t=1032&p=4805#p4805

This is a typical functional block diagram:

dual MOSFET switch
                                .---------. .--------.
                                | _/ | +12V| |
   +12V o----------+--------------o/ o------------->| |
                    | | | | SATA |
               .----'----. | _/ | | Power |
         o | +5V reg |---+-----o/. o------------->| |
         | '---------' | | | | +5V| |
        === | '----|----' | |
        GND +-------+ |HDD Power | |
                     | | | On/Off | |
                 .---'--. .--'---. | control | |
     switchmode |Vcore | | Vio | | | HDD |
     regulators '---.--' '--.---' | | |
                     | | | | |
                     | | | | |
    .--. USB 2.0 .---'-------'---. | | |
    | |<------->| |---+ | |
    | | | USB-SATA | SATA Tx | |
    | |<--------| Bridge IC |------------------->| SATA |
    | |-------->| | | data |
    '--' USB 3.0 | |<-------------------| |
                 '-.-----.-----.-' SATA Rx | |
        VCC | | | '--------'
         + | | | .----.
         | | | | | |
        .-. | | +-------| | EEPROM/flash
        | | | | | |(bridge firmware)
     R | | | .-. '----'
        '-' | | | R
         | | | | R
         +---------+ '-' ___ LED
         | | |----|___|------|<-----o VCC
         | | | Error,
       | o | |/ Activity
     |=|> Pushbutton +------| Q
       | o Switch |>
         | |
         | |
        === ===
        GND GND

When an external drive is overvolted with a typical 19VDC laptop adapter, the bridge board usually survives. In those case where it does not, the typical failures are the dual MOSFET switch IC, and less often in the PWM controller IC for the 5V switchmode regulator.

Repairing Bridge PCBs in External HDDs:
http://www.alexsoft.org/viewtopic.php?f=100&t=155&p=311

2 Likes

Franc

Thanks for posting this info I’ll bookmark it and pass it along. 

Joe

I did indeed.  It does look like D4 is dead - i.e. it is shorted.  So from your other posts I see that I could attempt to just cut it out - but I’m a bit afraid to perform the surgery :). 

I’m inclined to look for the identical drive in attempt to swap HDD PCB.  My drive is relatively popular WDBACW0030HBK-NESN model, with the exact model revision(?) WDBACW0030HBK-00.  It seems to be on the oldish side, this particular one is a bit hard to find.  on the other hand the WDBACW0030HBK-01 is way easier to buy.  The question is - would the HDD PCB board from WDBACW0030HBK-01 work if my original drive is WDBACW0030HBK-00?  I mean I’m afraid that with encryption and all it may power up but I still will not be able to read my data.  Anyone knows for sure?

WD’s PCBs store unique, drive specific, “adaptive” data in “ROM”, either in a discrete 8-pin serial flash memory IC, or embedded with the Marvell MCU. This chip, or its contents, need to be transferred from patient to donor. Some PCB suppliers include such a service for free. The total cost should not be more than US$50.

Alternatively, see my FAQ for sources for the TVS diode and then ask your local TV/AV repair shop if they will replace it for you.

http://www.users.on.net/~fzabkar/HDD/TVS_diode_FAQ.html