www.deadharddrive.com

fredoman · Officially active! Joined: 01 Feb 2010 Posts: 3

So here is my dead hard drive story :
I just built a new desktop computer and I wanted to transfer the data from my old Maxtor MaxLine II drive to the new computer using a PATA to USB kit with external power supply. Stupidly I had the power already plugged when I tried to connect the Molex. I thought you could not connect the Molex plug the wrong way, but in fact you can push it in just enough to make contact. The result was a buzzing sound and a little cloud of smoke. As expected, the hard drive is no longer recognized...

Looking closely at the PCB I find one component that looks burned. It has written "W503" on the top of the component and the location on the PCB is labeled Q500. After some net research I am 99% sure that the component is a Sanyo FW503 DC/DC converter MOSFET (kind of makes sense that the DC/DC converter is the first to take some heat when connected the wrong way). The problem is, I have no idea where to buy this component. However it turns out that another dead Maxtor HD I own has at the same location (also labeled Q500) a similar looking component on its PCB board. This one reads FDFS 2P102A (Fairchild). I found the datasheets for both components:
FW503
FDFS2P102A,
however I am absolutely not used to reading such stuff. Embarassed

So if someone here knows a bit about electronics and wants to help me out :
thanks for having a look at the data sheets and telling if it is worth trying to replace the FW503 by the FDFS2P102A (supposing that nothing else got toasted on the PCB board).

Next step would be either to learn soldering such tiny components myself or ask some friend to do it for me... Wink

sunnydreamspace · Deadharddrive regular +5 Joined: 04 Jan 2009 Posts: 540

hi,
can you send high quality images of your PCB both side to me? i can help. thanks.
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harddrivespecialist · Posted: Wed Feb 03, 2010 1:09 pm Post subject:

Those two parts are compatible. You can replace one with another.
Your main problem here, that chip carries ROM info and it has to match your drive, otherwise your drive won't work.
Provide info from white front label of both drives (mainly need info from Left-lower part of the label) and I will let you know if you ROM matches.
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fredoman · Officially active! Joined: 01 Feb 2010 Posts: 3

@sunnydreamspace : I do not really see in what way images of my PCB help to answer my question. And thanks for your offer, but I think I will rather tinker a bit myself...

@harddrivespecialist :
thanks a lot for reply. Good news that the parts are compatible. I don't understand the second part however : ROM information on a simple Power MOSFET? My electronic knowledge is admittedly poor, but I can not imagine that this is possible. Anyways here are the information for the two drives:

the one I just burned:
Maxline II (PATA):
Code: RAM51W0
N,G,D,D
SN: A81WS94E
5A300J00816R4

my spare part drive (mechanically faulty, but electronically OK):
Maxline PLus II (SATA):
Code: YAR51HWO
K,M,B,D
SN: Y63GNR3E
7Y250M00660RA

sunnydreamspace · Deadharddrive regular +5 Joined: 04 Jan 2009 Posts: 540

as some type of PCB have ROM match with firmware which stock in platters. that you need to do soldering operation. why i asking for images? i can mention and check everything for you. Very Happy

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provide Hard drive PCB,entire drive/ Data Recovery service.... big HDD resource. talk to me immediately! sunnydreamspace@hotmail.com
skype: sunnydreamspace

harddrivespecialist · Posted: Thu Feb 04, 2010 2:46 pm Post subject:

No, its not going to work.
At least you have to match a Model number, interface and etc.
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sunnydreamspace · Deadharddrive regular +5 Joined: 04 Jan 2009 Posts: 540

haha..simple case much ideas Laughing

_________________
provide Hard drive PCB,entire drive/ Data Recovery service.... big HDD resource. talk to me immediately! sunnydreamspace@hotmail.com
skype: sunnydreamspace

50crckt51 · Posted: Tue Feb 09, 2010 5:53 pm Post subject:

As for locating components for sale try www.mouser.com, they have a wide selection.
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Don't worry - Smoke dissipates!

fredoman · Officially active! Joined: 01 Feb 2010 Posts: 3

Here are some final notes on my dead hard drive story. Exchanging the DC/DC converter did not fix the problem. Either my soldering skills were insufficient or there were some other components killed on the PCB board. So finally I did the "standard procedure"... finding a suitable replacement PCB board and swapping the boards. Hard drive works fine again. Very Happy

Thanks everybody for your kind replies, have a nice day without HD failures !

fzabkar · Deadharddrive regular +3 Joined: 02 Apr 2010 Posts: 210

[quote="fredoman"]So finally I did the "standard procedure"... finding a suitable replacement PCB board and swapping the boards. Hard drive works fine again.[/quote]
Are you saying that a ROM transplant was not required?

BTW, the "FETKY" parts in the DC/DC converter are just a MOSFET chopper and Schottky flywheel diode in the same package. The serial EEPROM is a separate 8-pin part.

FWIW, I notice that pin 2 of the Sanyo part is not connected. Hopefully the PCB connects to pin 1.