Seagate Barracuda 7200.12 320GB

[ephraim2]

hello fzabkar

attached pls find a picture of the burnt pcb.

nice that u remember me from last time.

can u help and make your explanation more clear.

tks
ephraim

sorry for the quality of the picture

Attachments

[michael chiklis]

This is the worst picture i've ever seen

[ephraim2]

pls try to enlarge the picture. you'll see the burnt parts

[fzabkar]

ephraim2, I really do want to help you, but your photo is unusable.

Can you do any better with a flatbed scanner?

[ephraim2]

hello friends

attached two new pictures of the a/m hdd.

i am sure u can help

tks and brgds
ephraim

Attachments

[fzabkar]

Those are the inductors on the +5V supply. There is a risk that the preamp may be damaged, but you have done hundreds of head swaps, so that shouldn't concern you.

The first thing to do is to remove the shorted 5V TVS diode. I recommend flush cutters for this purpose, or you could use a soldering iron if you prefer.

http://www.users.on.net/~fzabkar/HDD/ST ... 5V_TVS.jpg

My TVS diode FAQ lists suitable replacement diodes and sources.

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

The next step is to replace the burnt inductors with wire links.

http://www.users.on.net/~fzabkar/HDD/ST ... uctors.jpg

wire_links.jpg (76.16 KiB) Viewed 8814 times

I suggest you use the end of a resistor leg. Bend the leg, tack solder it in place, then trim it to length.

I recommend that you backup the contents of the serial EEPROM before doing anything. I also recommend that you recheck your PCB for short circuits before powering it up again.

That said, if the only problem is the diode and the inductors, then the two wire links should be all you need to do.

Good luck.

[michael chiklis]

fzabkar are u sure those are inductors?
I thought they were fuse!

However he can use the end of a resistor leg or wire wrap as this:
http://www.ebay.it/itm/Unistrand-24AWG- ... 43bcf609fd

I prefer wire wrap because they are thinner and therefore more manageable

[ephraim2]

fzabkar

tks for your assistane. we'll try and let u know

brgds
ephraim

[fzabkar]

fzabkar are u sure those are inductors?
I thought they were fuse!

Fuses are designed to fuse, not to burn up. In any case you would only need 1 fuse, not 2.

[waqas_ali766]

then error u mention appear due to two problem .
1. when head stack or clicking.
2. when software corrupt .
solution
get t mode
enter m0,2,2,,,,,22
then clear smart
then use disable relocation of bad sector by congen

if facing problem then mail me
waqasali766@hotmail.com
thanks

[waqas_ali766]

hi
this error (No HOST FIS-ReadyStatusFlags 2002A1A5) occur due to two reasons.
when internal software is damaged.
second when head stack . or clicking.
thanks