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
November 26th, 2022, 11:56
I have HGST drive, model HTS541010A9E680 which does not have any reaction - when connected to computer.
Pictures are included.
Can you please advise troubleshooting process?
I have practice in logic boards of cell phones and tablets reparing but not in hard drive reparing.
Thank help
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November 26th, 2022, 21:44
Measure the voltage across the "A1" TVS diode near the SATA power connector. If +5V is missing, then test for shorts to ground at this point. Also test the tiny smt fuse (or inductor?) at the SATA 5V pins.
https://pinoutguide.com/Power/sata-power_pinout.shtml
December 5th, 2022, 15:17
I have 5V on the diode and also on SATA.
I also measured some other voltages on the logic board , but it is not easy to find a problem without a schematic.
Are there datasheets for that TLS2601HDCARG4 and 88i9305-TLA2 available?
Thank you for help
December 5th, 2022, 15:31
Any history. Are you sure it's the original HDD board ?
December 5th, 2022, 16:08
What are the voltages at V1 and V2?
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- V1.jpg (105.84 KiB) Viewed 4682 times
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December 5th, 2022, 16:32
suricate.ch wrote:Any history. Are you sure it's the original HDD board ?
The date code on the PCB is 1321, ie week 21 of 2013.
The manufacture date on the label is 4 July, 2013.
Therefore the PCB is probably native (or a very close match).
BTW, I expect that V1 and V2 are +1.2V (Vcore) and +2.5V (Vio). Both the ROM and SDRAM require a 2.5V supply.
December 5th, 2022, 16:54
Just saw this:
https://sep.yimg.com/ay/yhst-14437584971410/91711083-6.gifThe RV sensor in the top left corner has fallen off.
December 6th, 2022, 4:20
Thank you for your replies.
I have these voltages:
V1 is 0.87V
V2 is 2.53V
Picture you posted,
https://sep.yimg.com/ay/yhst-1443758497 ... 1083-6.gifsaying
The RV sensor in the top left corner has fallen off
is not of my logic board.
I am enclosing the correct picture again
V1 seems rather low, what do you think?
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December 6th, 2022, 14:22
The Vcore voltage for older ARM cores was 1.2V. Later cores operated at 0.9V. I can't recall when the change happened.
The most expedient approach would be to purchase a donor PCB and transfer the "ROM" (LE25FU406C).
The only other possibility I can think of is that the drive may be configured to Power Up In Standby (PUIS). A tool such as HDAT2 can disable PUIS.
December 6th, 2022, 15:13
Thank you for your reply.
if I connect the harddrive to a computer and try to install Linux on the computer, the drive will be detected, even if in PUIS mode?
December 6th, 2022, 15:33
AFAIK, Linux will automatically spin up any PUIS-enabled drive.
December 8th, 2022, 8:54
I tried under Linux but the harddrive was not detected either.
Do you have any other idea what I should try, except the logic board replacement?
Are there datasheets for that TLS2601HDCARG4 and 88i9305-TLA2 available?
Thank you for help
December 8th, 2022, 12:09
I am not aware of any datasheets for the MCU or motor controller.
I would dump the contents of the "ROM", but you must not damage this chip. It contains information that is unique to each drive.
December 8th, 2022, 13:58
But what is the point in dumping of the ROM?
Checking that ROM is working?
Or test anything else?
I do not know what exactly the content should be.
December 8th, 2022, 14:02
If the ROM is corrupt, the drive will not come ready. I can verify the checksum of one portion of the ROM ("NVRAM").
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