Check out this FULLY LABELED Seagate 100656494 PCB (ST4000DX000)...

[$300 Data Recovery]

I'm posting this mainly for the people out there much smarter than me that may find some value in what this PCB has to say (Frank?). Hopefully, it will offer some insight or potential solution to a problem.

[Chris Berge]

Woah! What was the drive it came from? 

On Wed, Feb 24, 2021, 9:37 AM $300 Data Recovery <bco...@gmail.com> wrote:

I'm posting this mainly for the people out there much smarter than me that may find some value in what this PCB has to say (Frank?). Hopefully, it will offer some insight or potential solution to a problem.

--
Data Recovery Certification Group / for issue with google group please email sc...@myharddrivedied.com
---
You received this message because you are subscribed to the Google Groups "DataRecoveryCertification" group.
To unsubscribe from this group and stop receiving emails from it, send an email to datarecoverycertif...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/datarecoverycertification/f9550b35-8b3c-4699-8ba0-7827e3500509n%40googlegroups.com.

[pbzcbf...@gmail.com]

That's very interesting. I think I'll buy one. 

[pbzcbf...@gmail.com]

Hmm, be careful. Not all PCBs are labelled, even when they are marked with the same "Rev A".

https://images-na.ssl-images-amazon.com/images/I/814ooBDv4mL._SL1500_.jpg

[$300 Data Recovery]

Came on a customer's drive (along with bad heads). I see now that Donordrives has them labeled too: https://www.donordrives.com/catalogsearch/result/index/?item_type=24&q=100656494

[Alandata Recovery]

almost looks like a training board for engineering

To view this discussion on the web visit https://groups.google.com/d/msgid/datarecoverycertification/220d8c8e-a19f-4080-9ab3-e15f7cc72ec0n%40googlegroups.com.

--

Alandata Data Recovery -  (949)287-3282  
"Cleanroom Data Recovery of RAID, VMware, NAS, Linux, Tape, Disk, Forensics"

www.alandata.com   www.alandataRecovery.com

[pbzcbf...@gmail.com]

I don't trust Chinese sellers. I see a PCB at aliexpress, but I don't see any way to ask the seller to send me the correct PCB. The photos show both the labelled and unlabelled versions, and the seller says that any PCB that is deemed compatible with the ordered one will be shipped.

The alternative is US$60 - $70 from Western sources. I don't trust Donor Drives, and I don't wish to pay this price just to satisfy my curiosity.

I'll try to do my best from the photos. If anyone has a CCD scanner (not CIS), then hires 1200dpi scans of each side would be ideal.

[Data Recovery Guru]

Have you ordered from Donor Drives before? Or have you had a bad experience with them?

What city/state are you in? We may know of other part suppliers.

--
Data Recovery Certification Group / for issue with google group please email sc...@myharddrivedied.com
---
You received this message because you are subscribed to the Google Groups "DataRecoveryCertification" group.
To unsubscribe from this group and stop receiving emails from it, send an email to datarecoverycertif...@googlegroups.com.

To view this discussion on the web visit https://groups.google.com/d/msgid/datarecoverycertification/d5232812-23bd-4e30-90e5-56fd6246bb88n%40googlegroups.com.

[pbzcbf...@gmail.com]

I'm in Australia. I'll keep looking. In the meantime I'll publish what I can at the HDD Oracle. I don't believe I need a functional PCB, so one should turn up for the right price eventually.

Incidentally, a lot of the signal names can be identified in the data sheet for the SMOOTH L7250. I'm particularly curious about the NAND_DATAn references. Those pins don't seem to go anywhere.

The PA pins are obviously preamp related.

The HDA_Temp signal looks interesting. I wouldn't have expected to find it near the motor controller. 

The main supply voltages are identified as CORE_VDD, CORE_VDD_2 and VCHAN. I've been referring to the latter as Vio.

The MICRO, BOOTSTRAP, DIAG and TEST pins look interesting as well.

[trum...@gmail.com]

Thanks for sharing Brian. 

Thank goodness all manufactures don't make our lives more difficult providing schematics or even OEM replacement parts ... (instead of deliberately making them not work when you do replace a part ... ala Apple).