I have two internal WD drives and the one I need has a controller that the power got plugged into backwards and is now unusable. I am hoping I can do a direct swap, but figured it’s better to check before doing. The good controller is on a WD3200AAKS - controller p/n is: 2061-701444-80AA. The bad controller is on a WD8088AADS - controller p/n is: 2061-701640-700-02PD3. My experience with part numbering leads me to believe there is a good chance this will work, but I prefer to have someone with more knowledge back me up. There also may be something to config I don’t know about. Thanks for helping. Mike
I can’t advise as to the general compatibility of the two boards. However, even two identical boards will not be interchangeable. This is because each board stores unique, drive specific “adaptive” data in flash memory, either in an 8-pin chip at location U12, or within the Marvell MCU (big “M”) in those cases where U12 is not populated. These adaptives need to transferred from patient to donor. Sometimes, if the tolerances are close enough, a direct board swap may work, but this rarely happens.
That said, the usual result of an overvoltage or reverse voltage is that one or more of the TVS diodes (D4 or D3) go short circuit. Most of the time the fix is as easy as removing the shorted protection diode with flush cutters. One or both of the zero-ohm resistors (R64 and R67) may also go open circuit, in which case the fix is to flow a blob of solder over it, or replace it with a short wire link.
Be aware that removing the TVS diode also removes the overvoltage protection from the affected supply rail, so be absolutely sure your PSU is OK.
Thank you very much. This is a big help. I did not know there was active data stored in memory. After thinking about it I feel a little sheepish that I didn’t think about that … hee hee. The fix was simple as you described. The one diode was toast and after changing worked great!!
