WD5000AAKS - 00TMA0 PCB repair - driveparamter chip

[repro21]

hello to all hdd kings

my problem is, the old pcb has a burned out unit in the upper right corner, when the pcb get power the chip really smoke and get very hot
i have a brandnew board (all absolute ident) but i need to know WICH CHIP contains the drive parameters??

hotairstation and so on isnt a problem

please help me


many thanks in adv.

michael

Attachments

old board: burned unit UPPER RIGHT

[Agent]

The one with the M on this specific board I would think.

[repro21]

many thanks Agent

the biggest one

what do you think

is it better to change the "m" to the new board
or is it better to try to repair the "old" board - but what can happen that the upper right unit gets so hot??

i read a lot of "smooth" chips burned out !?

[Agent]

I'd shoot for repair of the original board first, search TVS Diode on this forum for more info

[fzabkar]

the old pcb has a burned out unit in the upper right corner, when the pcb get power the chip really smoke and get very hot

That's the 12V TVS diode. You can simply remove it. If there is no other damage, the drive will work perfectly well without it. Just be absolutely certain that your power supply is OK, as you will no longer have overvoltage protection on the +12V supply. For continued protection you can replace it with an SMBJ12A from Farnell, Mouser, Digikey.

It sounds like zero-ohm resistor R64 is OK, but measure its resistance to be certain. If it is open circuit, you can replace it with a wire link.

[repro21]

@fzabkar


YOU ARE MY HERO!!!!!
MANY THANKS!!!!

your trick works GREAT!!!!!!

all datas recovered (460 GB)