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 Post subject: Samsung ST1000LM024 head change strange case
PostPosted: July 14th, 2017, 9:00 
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Joined: September 7th, 2012, 16:37
Posts: 122
Hello,

I have a Seagate/Samsung drive ST1000LM024 that had an issue with its heads after it felt down.

When I changed heads with an exact drive, the drive doesn't spin at all (it stuck on BSY).

When I put Donor PCB on the Patient drive (after heads were changed), drive spin well without clicks but doesn't reach readiness (of course because it has donor ROM).

So I thought it was an issue with patient PCB too, so I transferred Patient ROM on Donor PCB and put it on the Patient drive. Now drive doesn't spin at all (it stuck on BSY)

Please, any advice or help, I'll be thankful.

Attachment:
PATIENT.jpg
PATIENT.jpg [ 522.29 KiB | Viewed 781 times ]


Attachment:
DONOR.jpg
DONOR.jpg [ 673.35 KiB | Viewed 781 times ]


Kind regards


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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 14th, 2017, 9:06 
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Joined: October 24th, 2014, 4:57
Posts: 205
Location: Remote Raid Help on planet Earth
Patient heads and donor heads have different preamplifier. For pacient PCB the donor heads preamplifier is incompatible.

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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 14th, 2017, 9:48 
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Joined: September 7th, 2012, 16:37
Posts: 122
Thank you for your quick reply.

Why drive spin smoothly when I put Donor PCB (with Donor ROM)? the drive is not recognised because it has Donor ROM but it spin without clicks.

When I transfer patient ROM to Donor PCB, drive stop spinning at all.


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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 14th, 2017, 16:19 
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Joined: September 8th, 2009, 18:21
Posts: 9685
Location: Australia
Show us the terminal output.

    donor heads + patient PCB/ROM + patient MOVLY001 -> no spin -> incompatible preamp & ROM
    donor heads + donor PCB/ROM + patient MOVLY001 -> spin, not ready -> incompatible ROM & MC (or MC damage?)
    donor heads + donor PCB + patient ROM + patient MOVLY001 -> no spin -> incompatible preamp & ROM

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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 15th, 2017, 2:56 
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Joined: September 7th, 2012, 16:37
Posts: 122
Quote:
donor heads + patient PCB/ROM + patient MOVLY001 -> no spin -> incompatible preamp & ROM
donor heads + donor PCB/ROM + patient MOVLY001 -> spin, not ready -> incompatible ROM & MC (or MC damage?)
donor heads + donor PCB + patient ROM + patient MOVLY001 -> no spin -> incompatible preamp & ROM


EXACT.

In the 3 cases, it doesn't show anything in Terminal (even for the second case :( )


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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 15th, 2017, 3:08 
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Joined: September 8th, 2009, 18:21
Posts: 9685
Location: Australia
I suspect that the interface voltage is 1.8V LVTTL and that your TTL adapter is a 3.3V type.

If so, then you could try this Kindle mod:
http://www.hostingpics.net/viewer.php?i ... mod18V.jpg

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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 15th, 2017, 4:52 
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Joined: October 21st, 2007, 8:48
Posts: 1054
What's the PCB number of both patient & donor?


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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 15th, 2017, 6:23 
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Joined: September 7th, 2012, 16:37
Posts: 122
Quote:
I suspect that the interface voltage is 1.8V LVTTL and that your TTL adapter is a 3.3V type.

If so, then you could try this Kindle mod:
http://www.hostingpics.net/viewer.php?i ... mod18V.jpg


Please, I'm a Computer, not an Electronic guy. Should I solder or unsolder a chip from the PCB?

For the PCB number, it's the same Seagate PCB number for both HDDs: 100720903 04


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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 15th, 2017, 6:40 
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Joined: October 21st, 2007, 8:48
Posts: 1054
The drive in topic must be Samsung M8 not Seagate. And the PCB # must ends with REV.03, 06 or 07.


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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 15th, 2017, 7:45 
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Joined: August 15th, 2006, 3:01
Posts: 2296
Location: CDRLabs @ Chandigarh [ India ]
unknown wrote:
The drive in topic must be Samsung M8 not Seagate. And the PCB # must ends with REV.03, 06 or 07.


Well,
See The First Post And The Pictures ? .

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My Data Recovery Experiments - > https://www.facebook.com/chandigarhdatarecovery


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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 15th, 2017, 7:50 
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Joined: August 15th, 2006, 3:01
Posts: 2296
Location: CDRLabs @ Chandigarh [ India ]
@ Everyone ,
Has Someone Tried If Adapting The Native Rom + SA Modules To Donor Rom + SA Modules Lets Us Work With Different Preamp Heads ,Well Worth The Experiment .

The Following Are The Preamps i Have Come Across

1 : T5563
2 : L2957
3 : T5565
4 : L2958
:mrgreen: :D

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Amarbir S Dhillon
CDRLabs Data Recovery - [ Chandigarh ,India ]
My Data Recovery Experiments - > https://www.facebook.com/chandigarhdatarecovery


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 Post subject: Re: Samsung ST1000LM024 head change strange case
PostPosted: July 15th, 2017, 16:25 
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Joined: September 8th, 2009, 18:21
Posts: 9685
Location: Australia
Here is an -03 PCB:

http://ep.yimg.com/ay/yhst-14437584971410/91404141-9.gif

The serial TTL Tx/Rx test points are clearly defined. Measure the voltages at the two large round pads at the top left corner.

See the posts by AesEbu in the following thread:
viewtopic.php?f=1&t=29286

How to connect a terminal adaptor on a Samsung drive ?
http://www.hddoracle.com/viewtopic.php?f=116&t=189

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