Seagate ST9250410AS Momentus 7200.4 PCB problem?

[infofaster]

Hi guys,

I got this drive Seagate ST9250410AS Momentus 7200.4 and when i power on in PC3000 the drive doesnt spin and give me this log in the terminal: "Bogus ISR".

Its the PCB that are damage?

Best regards,

[ici_lemmy]

Its the PCB that are damage?

Or the motor...

[infofaster]

Good point,

I'm going to open it to see if is the heads that are stuck our the motor blocked.

Thanks ici_lemmy

[ici_lemmy]

I'm going to open it to see if is the heads that are stuck our the motor blocked.

If not --> PCB

[infofaster]

I Open it and the motor spin and the heads are in parking area.

I test the diodes from the pcb and they are fine, probably its any track that isnt passing voltage to the components.

[Vulcan]

A couple of comments...

drive doesnt spin

the motor spin

These two statements from you, seem to contradict each other. That makes it difficult for others to give you good advice You might get more accurate advice if you explain this apparent contradiction in your two statements.

give me this log in the terminal: "Bogus ISR"

probably its any track that isnt passing voltage to the components.

That is just a wild guess, isn't it. I don't work with these drives, but based on the specific one line of terminal output which you have provided, then from my low-level programming background, I would not be making the same guess - at least not at the beginning. YMMV Providing the full terminal output might allow others (who work on this type of drive) to give you more suggestions.

[mr_spokk]

I Open it and the motor spin and the heads are in parking area.

I test the diodes from the pcb and they are fine, probably its any track that isnt passing voltage to the components.

When you wrote "motor spinn" I assume that is by hand...not by power, right?
I think you have a bad preamp.

Regards/ Bosse

[dmarques]

Have you tested it with another PCB ?

[northwind]

I second mr_spokk's assumption.
Also I think when he said motor spins, he meant he tried to rotate platters with hand, and they rotate freely.

[ici_lemmy]

I second mr_spokk's assumption.
Also I think when he said motor spins, he meant he tried to rotate platters with hand, and they rotate freely.

If so, try another PCB to see if it rotates, if not --> motor is dead !

[mr_spokk]

I second mr_spokk's assumption.
Also I think when he said motor spins, he meant he tried to rotate platters with hand, and they rotate freely.

If so, try another PCB to see if it rotates, if not --> motor is dead !

In all my year in DR I have never seen a "dead motor", Bad bearings on Toshiba, Seagate and so...but never a dead motor.
But sometimes it has to be the first one

Bosse

[fzabkar]

I Open it and the motor spin and the heads are in parking area.

Why didn't you just monitor the motor terminals with a multimeter or oscilloscope? Alternatively, you could have measured the motor current at the sense resistors.

I test the diodes from the pcb and they are fine, probably its any track that isnt passing voltage to the components.

If the TVS diodes were shorted, then the drive would not have powered up.

[infofaster]

I figured out, the real problem was the PCB. I change the ROM Chip to donor PCB and the drive starts to spin and read the SA.
Data recovered!

Thank you guys for your Help.