Hi all,

My HDD (WD3200JB-00KFA0) PCB got fried due to power surge (my guess).
And the following are pictures of the PCB.
Could anyone help me to identify what components got burned?
And also what's the function of each particular components?
It'll help to find out what really happened.

After doing research on google, etc., what I know is the most top IC is the motor.
But I don't know the rest.
By looking at the cushion, there are 4 areas got burnt.
I mirrored the cushion picture just to make it easier to see.

Here they are,




Background
I got 3 HDDs on my PC system. After the problem happened, only the primary HDD (O/S system) got damaged. The other 2 HDDs are still fine until now.

Timeline,
1. I tried to connect an quite old HDD "Quantum Fireball Plus AS20.5" (IDE) using an external HDD enclosure to my desktop PC.
2. I powered on the external drive and plugged the USB cable.
3. The PC didn't recognize the external HDD, and I powered it on and off for a couple of times (with an interval of 7-10 secs).
4. Finally it was recognized, but then the system (Windows XP Pro SP2) froze.
5. About 30 secs or so, the PC shut off (monitor and CPU fan were off). However, the Power Supply & hard disk LEDs still on.
6. I pressed the power button repeatedly, but the LEDs still on.
7. Another 15 secs or so, there was a sound (seems like something blown, but it wasn't loud, just soft).
8. I started to smell burning odor both from power supply and the primary HDD.

Other parts of the PC are still fine, i.e. mother board, RAM, CPU, DVD drive, ADSL Modem, etc.
The ones got damaged are only the primary HDD and the power supply.
I opened the power supply and I noticed one of the diode's leg was hanging above the PCB and the other still attached.
It seemed that it was blown out of the PCB board.

By judging from what happened, do you think the head stack or other component of the HDD got damaged as well?
Can anyone give any comment about this?

My guess is they're okay, only the PCB is damaged.
If this is the case, after googling for a couple of weeks, here are my ideas on what to do next,
1. Get a new WD3200JB-00KFA0 with the same PCB number, i.e. 2060-701314-002 REV A and made in the same country (Thailand).
Other details such as DATE OF MANUFACTURED, DCM are not important since I'm not gonna change the head stack.
But, the motor IC and the main IC number have to match the bad PCB.
Do I need to match the serial number sticker label underneath the IDE connector?
2. Desolder the firmware chip (U12) from the bad PCB and solder it to the good PCB.

Can anyone tell me my ideas are correct or not?
Please throw any comment.

Thanks in advanced. Any help would be much appreciated.

David

Hi there,
The only thing you need to match is: "2060-701314-002"...those boards are quite common on other models also.
And then desolder the U12 ROM chip from your burnt Pcb, and resolder it to the new one.

Regards

Bosse

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Wow, that was quick.

Could you tell me more detail about desolder and soldering the U12 chip?
Such as the correct temperature of the solder ion?
What's the longest time to solder without burning the chip from the heat?
Do I need heat sink or use flux?

Also, what's the success rate of reviving the HDD by moving the firmware chip with to the new (same) PCB?

Thank you and please excuse a newbie here

P.S. Btw, could it be the U12 firmware chip also fried?

Hi,
I'm useing a hotair soldering station, you can use a normal solering iron, but it's more difficult as you need to go from "leg to leg".
The best with hotair de/resoldering is that you can move the nozzle much more freeley, just apply so much heat so the solder melts, then quick off with the heat....but if you not feel comfortable with soldering, got to a tv-repir guy or so and let them do the job for you.
For me that rate is 100%.
And there always is a chance that the ROM is also burnt...but they seems to handle the overcurrent better than other Ic's so your chance is high that the chip is ok.

Bosse

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Rescue IT Dataräddning Göteborg AB
http://www.rescue-it.se

Thank for your replies and infos Bosse

Do you know about what are the functions of the burnt components?

Or anyone can explain? And how to prevent this from happening again?
I'm just curious to know and make sure the same thing wouldn't happen twice.

P.S. I just don't understand why the motherboard, etc. still working fine, and only the primary HDD and Power supply got damaged???

Buy yourself a good power supply unit and this won't happen again.

I am nebie her i really thank you for sharing. I am experianced on computer and electronics and i have had good experiance on recover deleted file before 5 years from that onward i always do research and do google works and study hard on HDD but this forum is the most important to reach my goal and dream soon..... thanks again i will share my experiance also in the near future

I am newbie here i really thank you for sharing. I am experianced on computer and electronics and i have had good experiance on recover deleted file before 5 years from that onward i always do research and do google works and study hard on HDD but this forum is the most important to reach my goal and dream soon..... thanks again i will share my experiance also in the near future

Close-ups

2 more close-ups

Sometimes high bearing torque and poor cooling will cause the servo chip to burn out.
The servo chip normally shorts out when it fries and takes out other chips.
If you do get it working I would suggest using a cooling fan on your drive and get the data off as quickly as possible. I would also suggest trashing the drive once you get your data off.

I put a power supply sized fan in front and perpendicular to 2 HDDs. The one damaged is on the top.

I checked it before with SpeedFan, and both HDDs temp was around 30-35 degrees Celcius (86-95 degrees Farenheit). I guess that's "cool" enough, isn't it? Or not???

Btw, which one is the servo chip?

he is talking about the Spindle motor controller .

Hi,

I happen to find someone selling "almost" exactly the same HDD as mine.

Here's mine:
MDL: WD3200JB-00KFA0
DATE: 22 JUN 2006
DCM: HSCHCAJCA
PCB: 2060-701314-002 REV A
PCB Label: 2061-701314-A00 AG XS 2L13 D1LH 4 000431R 6314

Other HDD:
MDL: WD3200JB-00KFA0
DATE: 30 JAN 2006
DCM: HSCHCAJCH
PCB: 2060-701314-002 REV A
PCB Label: 2061-701314-A00 AG XS 2L13 A5H6 6 0005280 6295

Please note that the HDD Label Sticker is different.
However, both HDDs have black casing.

Despite of 5 months produced earlier, do you think this PCB will work on mine without doing ROM chip swap?
How big is the risk without doing ROM swap? What will happen?
Any gurus or anyone who has the experience, could you give me any comment about this?

Thanks in advance.

Here's the pics,

Hi Dav,

Without swapping rom this is guaranteed NOT to work.
If you can swap the rom, then this pcb should work.

Best regards,

Dobre

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Thanks for your reply.

Could you explain to me why this absolutely won't work? What's the reason?
Have you had experience on this before?

Thanks once more.

Dobre is correct,

These drives have adaptive data in the ROM. Sort of like "fine tuning" parameters, programmmed at the factory.

You MUST swap the ROM, or at least read it out and re-program the donor PCB.

Unless you are very, very lucky.

I have got away with it once on a similar drive, the donor just happened to be the other half of the RAID array, so the drive was the next sequentially serial numbered drive.

Sean

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Thanks for your input Sean.

If I want to give it a shot without swapping the ROM chip, and if it's not compatible, what further damage will it do to my HDD? Will it do any physical damage?

On another matter, let's say if I wanna do hardware swap, i.e. head, spindle, actuator arm, etc. The above HDD will be compatible to mine, right?
As far as my research goes, the 5th & 6th letter of the DCM must match in order to do head swap. Correct?
However, I also read somewhere that the last 3 letters much match.
Anyone can justify this?

Thanks.

ROM swap is not risky as for me i have been 100% successfull in ROM swap so go ahead .
As for the head swap in WD its very risky .

Due recalibration?

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