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 Post subject: ReplaceIBM Deskstar PCB
PostPosted: August 23rd, 2006, 11:51 
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Joined: August 22nd, 2006, 3:34
Posts: 7
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


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 Post subject: Re: ReplaceIBM Deskstar PCB
PostPosted: August 23rd, 2006, 11:58 
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Joined: October 11th, 2005, 6:04
Posts: 34
Location: St.Petersburg, Russia
wwas wrote:
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


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 Post subject:
PostPosted: August 23rd, 2006, 13:11 
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Joined: August 22nd, 2006, 3:34
Posts: 7
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.


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 Post subject:
PostPosted: August 23rd, 2006, 14:50 
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Joined: October 3rd, 2005, 0:40
Posts: 4754
Location: Hungary
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


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 Post subject:
PostPosted: August 23rd, 2006, 17:02 
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Joined: August 22nd, 2006, 3:34
Posts: 7
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


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 Post subject:
PostPosted: August 24th, 2006, 4:01 
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Joined: October 11th, 2005, 6:04
Posts: 34
Location: St.Petersburg, Russia
wwas wrote:
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.


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

wwas wrote:
How can I rewrite the 93LC66 with a good code?


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" :wink:

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...

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


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 Post subject:
PostPosted: August 24th, 2006, 12:46 
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Joined: October 3rd, 2005, 0:40
Posts: 4754
Location: Hungary
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


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 Post subject:
PostPosted: August 24th, 2006, 15:53 
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Joined: September 27th, 2005, 4:26
Posts: 505
Location: Bulgaria, Sofia
wwas wrote:
How can I rewrite the 93LC66 with a good code?

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.

_________________
DataRecovery.bg


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 Post subject:
PostPosted: August 24th, 2006, 16:23 
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Joined: August 22nd, 2006, 3:34
Posts: 7
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


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 Post subject:
PostPosted: August 24th, 2006, 16:25 
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Joined: August 22nd, 2006, 3:34
Posts: 7
Image


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 Post subject:
PostPosted: August 24th, 2006, 17:17 
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Joined: October 3rd, 2005, 0:40
Posts: 4754
Location: Hungary
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


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 Post subject:
PostPosted: August 24th, 2006, 17:43 
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Joined: August 22nd, 2006, 3:34
Posts: 7
Hi pepe,
Which 4 pin IC, are you talking about the motor drive IC?
I am all ready to go...
wwas


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 Post subject:
PostPosted: August 24th, 2006, 18:19 
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Joined: September 27th, 2005, 4:26
Posts: 505
Location: Bulgaria, Sofia
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


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 Post subject:
PostPosted: August 25th, 2006, 0:49 
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Joined: February 7th, 2006, 12:16
Posts: 13
wwas wrote:
Image


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 .


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 Post subject:
PostPosted: August 25th, 2006, 1:55 
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Joined: August 22nd, 2006, 3:34
Posts: 7
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


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 Post subject:
PostPosted: August 25th, 2006, 2:26 
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Joined: October 3rd, 2005, 0:40
Posts: 4754
Location: Hungary
wwas wrote:
Hi pepe,
Which 4 pin IC, are you talking about the motor drive IC?
I am all ready to go...
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


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