hdt721010sla360 repair pcb

[Nick_S]

Dear members,

I have a hdt721010sla360 which I tried to fix. But in my hurry I accidentally removed 3 components.
They are marked in this picture:
http://www.users.on.net/~fzabkar/HDD/HD ... 60_TVS.jpg

With which component can I replace them and what is the function of the one marked ?

Thanks in advance,
Nick

[fzabkar]

I believe the smaller diode is a Schottky rectifier. AFAICT, its function is to protect the drive from reverse voltages.

A 5V TVS diode can be substituted with an SMAJ5.0A.

The 12V diode can be replaced with an SMBJ12A.

Both parts should be available from Farnell, Mouser, Digikey.

The drive will work without all three parts, but it won't have any overvoltage protection.

What was the original fault?