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Swapping PCB for Seagate Barracuda 7200.11


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#1 C--

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Posted 02 July 2013 - 09:28 AM

Hello,

Is there a way to swap the PCB of Seagate drives of the same model but which do have slightly different product numbers and firmwares?

The short answer is "no". Now, what about the long answer?

Is this possible by upgrading firmware and swapping chips?

Drive model: ST3500620 (Seagate Barracuda, 500 Gb, 7200.11)
P/N (old) 98X144-021
P/N (new) 98X144-033

Firmware (old): HP12
Fireware (new): DE12 (should be swapped to HP12)

For both drives:
PCB 100466726
REV A DLAJ-4

Thanks.

#2 fzabkar

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Posted 02 July 2013 - 01:30 PM

AISI, all you would need to do would be to transfer the 8-pin serial flash memory chip. Be very careful, though. If you damage this chip, then data recovery will become extremely expensive, if not impossible.

The best way to transfer the chip's contents is with an SOIC/SOP chip clip plus a chip programmer.

This database should help you identify the chip:
http://www.users.on....PROM_Flash.html

#3 C--

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Posted 03 July 2013 - 05:04 AM

Thank you.

I can see two 8-pin chips :
a. First chip is near the SATA ports
b. Second chip is near the left border when the circuit is oriented in such a way that the SATA ports are top
Which one should be swapped ?

Attached File  PCB_100466725.png   136.44KB   2 downloads

The labels on the chips are:

a. Old
===
HJ68H
FDFS
2P102A

a. New (fast unreadable)
===
E3P1S
P813

b. Old
===
25X40L002
0815

b. New
===
25FW408A
02
8Q63F

If not using a chip programmer, is using a hot air gun better than using a solder iron ?

#4 fzabkar

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Posted 03 July 2013 - 10:52 AM

Swap the 25X40L002 and 25FW408A chips.

W25X40L, Winbond, 4Mbit, 2.3V - 3.6V serial flash memory with 4KB sectors and dual output SPI:
http://www.winbond.c...40L_W25X80L.pdf

LE25FW408A, Sanyo, NOR type serial flash memory, MSOP8, 2.7 to 3.6 V, 4MB, SPIO/3:
http://www.sanyosemi...ghspeed-nor.php

The others chips are FETKYs:
http://www.users.on....Semis_Regs.html

FDFS2P102A, Integrated P-Channel PowerTrench® MOSFET and Schottky Diode, Fairchild, 20V, 3.3A:
http://pdf.datasheet.../FDFS2P102A.pdf

A hot air gun is easier but more dangerous than a soldering iron in some respects. I suggest that you practice on the replacement board first.

BTW, if the drive spins up, then the board is probably OK.

Edited by fzabkar, 03 July 2013 - 10:53 AM.

#5 C--

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Posted 03 July 2013 - 05:38 PM

Thanks. Good idea to practice on the replacement board first.

I assumed the board was OK, as it was responding in the Hyperterminal when following the procedure for the BSY ("busy") bug. However, Ctrl+z never worked after the drive was turned off and on.
But this is another topic.



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