Hi All,
I Have an IBM Deskstar IC35L080AVVA07-0 ATA, and I need to know if the Logic PCB can be changed on this drive. Has anyone changed these pcb's before. My motor drive IC is toasted.
Thank

Yes, it can be changed...

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best regards, vi http://www.scspb.ru/pchdd/ http://pchdd.narod.ru

Thanks for the quick reply vi, are there any special instructions to follow or do I just change the pcb, connect the drive and power-up the PC.

Hi,

1. only 80G model's PCB is applicable unless U solder the 93LC66 IC from the bad board to the good one. This is the safest way of getting a compatible PCB.
2. If U don't want to solder, U may choose a PCB from a 80G model (same family), but this way the compatibility cannot be guaranteed.
And there is also a small risk that if the PCB is incompatible the first power on will render it inoperable with its own HDA also. This can only be repaired by rewriting the 93LC66 with a good code.

regards,
pepe

Hi,
Thanks for the advice pepe but I think that I now have a bigger problem. I changed the PCB from a good 80g drive and tried it on this drive which is the same type and the HDD started up but it is not accessible to the system. I put back the PCB on the good drive and the same thing, it will spin-up but the system does not recognize the drive. I wish I read your post first I would have tried to replace the motor drive IC. How can I rewrite the 93LC66 with a good code?

Thanks in advance
wwas

Hm, can we see labels from original PCB and PCB you trying? They placed on ATA connector of PCB



1. use hardware programming equipment.

2. use software what can read/write IBM nvram, like pc3000 and others.

in both case you also need to have "good code"

ps. In all do it yourself recipe, you place your data at risk, because you don't have needed datarecovery experience, also you place at risk any drives used as "donor". So if you try fix situation yourself you must be always ready lost your data and "donor" drives forever...

_________________
best regards, vi http://www.scspb.ru/pchdd/ http://pchdd.narod.ru

Hi,

probably there is only one byte changed at offset 0x1FC, this should be 0.
if U can read out the contents, zero this byte then write it back, the donor will be OK again probably.
As for the bad drive, I suggest soldering this IC from the bad board to the good one, since this is much easier than replacing the motor combo.

regards,
pepe

Hi,
you can follow pepe's advice to unsolder 93LC66, see the contents and fix the byte(s) that do not belong to the place they are.
But also there are always a copy of 93LC66 located into the SA that can be used.
Unfortunately vi is right. You will need a tool to work with, and "good code" too.

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DataRecovery.bg

Hi,
Thanks for all the advice, I will search and see what I can fine...maybe I get lucky and come across another one of these drives.
This is not the first time that I changed HDD PCB's, the first time for IBM, but I understand the rist involved... you pay to learn Right...
and vi is right I don't have enough needed datarecovery experience. I will try and upload the pictures if it helps.
Thanks again ALL,
wwas

Hi,

U don't need anything except a soldering equipment, desolder the 4 pin IC (the right one of the two) from the damaged board and solder it onto the good one.
Then U place the good one onto the bad drive and...
(hopefuly )

pepe

Hi pepe,
Which 4 pin IC, are you talking about the motor drive IC?
I am all ready to go...
wwas

Hi,
2 wwas - 93LC66
2 pepe - I think I met 2 types ot that boards, they differ only by 25FV101T. And they were incompatible, even needed NvRam was written. Unfortunately i never try to swept it and see if this will work. All this is imho of course.

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DataRecovery.bg

These two electronicses you can exchange .
They fit in with themselves .
There should agree two first lines of numbers and letters .
You can exchange the all plate PCB .

Regards .

Hi bigolsen,
I tried replaceing the PCB's already it did not work, the drive would spin-up but the system did not see them. I replaced the S93C66 IC and it still did not work...
Thanks for the input...
wwas

Hi,

there are two 4 pin ICs on the pictures, as far as I see
the left one is a 25FV101 (made by Sanyo), and the right one is the 93LC66 (93C66), U should change this one.
This is not the motor combo, but a small serial EEPROM.

If U are trying to read it out in a programmer, watch out for the pinout, because they used a non-standard pinout on this board, pin2: Vcc, Pin7: GND, so choose type accordingly.
But first do the recovery !!

regards,
pepe