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Data recovery and disk repair questions and discussions related to old-fashioned SATA, SAS, SCSI, IDE, MFM hard drives - any type of storage device that has moving parts
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ST3250820AS pcb issue

August 1st, 2018, 10:22

Hi,
I received an old ST3250820AS HDD that suffered an unpleasant shock: the owner managed to destroy the crystal. From what I checked on an identical PCB model, the piece is a TXC with the dimensions of 8mm x 4.5mm but I'm not sure if the value is 30.000Hz or 10.000Hz(?!). I would like to know with which model this piece could be replaced because I do not want to do anything stupid.
Thank you.
Attachments
IMG_20180801_161531.jpg
2f29de1e-ae9d-4c6f-a2f4-0d6085dc906a_1.2fb11ffc539c106e7b3605c8472f945c.jpeg

Re: ST3250820AS pcb issue

August 1st, 2018, 15:34

You can solder 10Mhz Crystal.

Re: ST3250820AS pcb issue

August 1st, 2018, 16:10

I searched for this HP oem HDD with the same firmware, the same chip (LSI) and the same memory (Samsung). I found a lot of combinations between Agere/ST/LSI chip and Entrontech/Samsung/Hynix memory that had only 30MHz crystal. I did not know how important the value (more precisely the difference between the two values).

I will replace that crystal as pikus_09 suggested, after I get rid of the "quarantine" period I'm going through now.
Thank you both.
Attachments
IMG_20180801_230547.jpg

Re: ST3250820AS pcb issue

August 1st, 2018, 16:25

Could that be a 40MHz crystal? 10MHz seems much too slow.

Re: ST3250820AS pcb issue

August 1st, 2018, 16:55

These crystals kill me :)
I found 10MHz crystal on the same pcb, others have 30 MHz, not 40MHz.
s-l1600 (1).jpg
s-l1600 (2).jpg
The attachment s-l1600 (3).jpg is no longer available
Attachments
s-l1600 (3).jpg

Re: ST3250820AS pcb issue

August 1st, 2018, 17:12

ISTM that the "1" is actually a faded "3".

The PCB at the following link has the same MCU numbers as your patient:
https://www.hdd-parts.com/11150676.html

Re: ST3250820AS pcb issue

August 1st, 2018, 17:29

Ok, thanks for the tips. I will return with the result after they do the replacement, but I still have to wait until I leave the convalescence period.
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