HDT722525DLAT80 Dead PCB

[JAllmanTalbot]

Hi all,

I have a Hitachi HDT722525DLAT80 (MLC: BA1466, P/N: 0A31611) which has a dead PCB. I also have a donor drive which works perfectly.

Obviously as the PCB is dead (even when its off the drive I get no response from it at all), I can't read the NV-RAM from the chip. I've replaced the donor PCB on to the patient drive and checked the modules - all came back with errors. I then ran the NV-RAM adjustment tool to search for the SA. This found the service area and generated a new NV-RAM image, which I wrote to the drive.

After writing it to the drive and doing a module check, I get OKs on all Copy 0 modules, but all Copy 1 modules and some factory copy modules are still erroring. Also the HDD ID is not being read, and I get an error reading the "open" modules on start up.

Looking through the module check log, I can see messages such as 'Incompatible with NV-RAM' under the USAG heading.

Any ideas? Is there a way of achieving this without de-soldering the NV-RAM from the patient board and re-soldering it on to the donor, or is that the only way this can be achieved?

[CK]

Why aren't you prepared to move the NVRAM? It's by far the easiest way.

[Cleanroom]

I agree, moving the NVRAM chip to the compatible board is the quickest and easiest.

[pcimage]

Absolutely, much easier!

[fzabkar]

Is there a way of achieving this without de-soldering the NV-RAM from the patient board and re-soldering it on to the donor ...

See hdd-firmware-update-t22218.html

Otherwise, if you are prepared to measure some voltages, we could at least find out what is wrong with the original board.