HD503HI, trays not turn

[junix]

Hi i have an JD503HI F3_1D rev 02, trays not turn

i found :
HD503HI - FW: 1AJ10001 PCB: F3_1D Rev.01

Is compatible ?

[northwind]

You mean platters are stuck?

[junix]

hi,

yes, I not hear noise

[northwind]

And what do you intend to do with donor hdd?

If platters are stuck, then disk needs to be opened.
If disk needs to be opened, then clean room environment is required AND proper skills are required too.

If the problem is stiction, then a skilled pro can do this for you.

BUT if you do not hear any noise when you power on the disk, then probably pcb is kaputt.
If pcb is gone, then post pictures of your pcb from the component side and we can maybe help you.

But first you need to be clear; when you power on the disk, does it make ANY noise (like burr, beep...)? Or is it completely dead?

[junix]

hi,

ANY noise

in red, I replaced a component that was much heated. (same reference)

My comclusion, pcb is dead, is correct ? or platters are stuck

Attachments

[fzabkar]

Your drive has sustained an overvoltage on the +12V input. The damaged component is a 12V TVS diode.

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

If you have a multimeter, then I could help you test the onboard voltages. A cheap digital multimeter should cost around US$10 or less.

BTW, I don't know if a direct board swap will work, but at least you will be able to confirm if the PCB is faulty.

[junix]

hi,

I have a multimeter (semi-professional)
For the test, is it necessary to remove the PCB?

[fzabkar]

It would be better to test the board on its own first.

There are two 4R7 coils near the motor controller chip. Measure the voltages (Vcore & Vio) between ground and each of the coils. Use the plated through-holes below each coil as your test points.

Then measure the voltage (Vneg) at the bottom end of the diode below the 1R2 coil. This point should measure -5V.

I'm not certain which test point is which, but here is my first guess:
http://www.users.on.net/~fzabkar/HDD/HD ... ltages.jpg

You could use a screw hole or a SATA ground pin as your 0V reference.

[junix]

hi,

if i connect this PCB on the supply, it smoke

Attachments

[fzabkar]

First you need to be sure that your power supply is good. Then you can remove the shorted diode with flush cutters (as stated in my FAQ). If there are no other problems, then the drive will work without it, albeit without overvoltage protection on the +12V supply

That said, if the Samsung SDRAM is getting hot, then you have other more serious problems.

[junix]

I have verify my power supply and it's work perfectly, i've test an other hard drive and with multimeter.

Then you can remove the shorted diode with flush cutters (as stated in my FAQ)--> i don't fond your FAQ , is it in manuel section ?

i find this : js.list021.cn/view.php?num_iid=13707580923

[fzabkar]

See Q9:
http://www.users.on.net/~fzabkar/HDD/TVS_diode_FAQ.html

BTW, if the diode were shorted, then the power supply would be shutting down, and therefore the SDRAM wouldn't be heating up.

[junix]

i remove one or two diode ?

[fzabkar]

Just remove the one that is shorted, ie the 12V diode.

[junix]

i have remove one diode, but the disk is not find by bios

[fzabkar]

So does it spin up now?

[junix]

yes, disc rotates now

[junix]

ok, after 2 reboot, the hard drive is ok

[loki]

ok, after 2 reboot, the hard drive is ok

Thats good.
Now copy off your data to another drive as this drive no longer has over vaultage protection.


Loki