Seagate 1Tb "SSHD" dead PCB

[pcimage]

Got this drive in and PCB is "dead".

Well I say dead, it does not spin up drive or give any terminal output and stays BSY.

I have a good drive and that PCB gives terminal output and comes DRDY, whether it's connected to the HDA or not.

I swapped the ROMS and then both PCB's exhibited the same symptoms.

I'm guessing that the ROM tries to access the flash part of the drive and recognises it's not native?

Attached is a photo of the duff PCB....

Anyone come across this and/or offer some suggestions?

Attachments

[BlackST]

the chip at right upper corner near hda connector says it all...

[HaQue]

Why, because it has a "P" in white marker written on it? that's what it looks like to me, not a blown chip.

[BlackST]

Here I see like a corner is damaged and so the left side but I am on a mobile device and enlarging doesn't help.

Without any other info that's all I could see.

[pcimage]

the chip at right upper corner near hda connector says it all...

No, thats the "ROM" chip, which has been off/on the PCB.

I wrote the "P" on it for "PATIENT" when I swapped them over (to keep track and avoid confusing them) and a mark on the corner to highlight pin 1, and it's fine

The "DONOR" chip has a "D" on it

[Doomer]

I suggest you also move the NAND chip
Although the problem could be in it

[einstein9]

In addition you may try this:

Read the ROM via Programmer and write it to another chip n try

good luck

[pcimage]

I suggest you also move the NAND chip
Although the problem could be in it

I'll give it a shot!

Thx

[pcimage]

In addition you may try this:

Read the ROM via Programmer and write it to another chip n try

good luck

Maybe worth a shot, but I "think" the ROM is OK. Normally if the ROM is bad the drive doesn't go to BSY.

Thanks for the reply

[ROb]

Put both the ROMs on Original PCBs and check if they still are working or are in same condition. Just to verify problem has not deteriorated.
Otherwise all the above post shall definitely help you..

[fzabkar]

Before hacking into any of the chips, I would at least measure the onboard supply voltages.

[pcimage]

Before hacking into any of the chips, I would at least measure the onboard supply voltages.

Ok.

As you've probably figured out, my core electronic kmowledge isn't as good as it could be (which hasn't hampered me in 1,000's of successful recoveries so far!) so any pointers would be appreciated

[Nick_CT]

Good luck moving that NAND I'd be scared that I would bugger a QFN that big.

[fzabkar]

Take care when read or writing the "ROM". The "B" version has a supply voltage range of 1.65V - 1.95V, with an absolute maximum of 2.35V. The "VCC + 0.4" spec for the "B" part is ambiguous, but the datasheet for the "V" part makes this clearer.

W25Q80BWIG, Winbond, 8Mbit, serial flash memory, SPI, B = 1.65V - 1.95V:
http://www.nexflash.com/NR/rdonlyres/A4 ... 5Q80BW.pdf

Code:

Absolute Maximum Ratings

Parameters      Symbol  Range
-----------------------------------------
Supply Voltage  VCC     -0.6 to VCC + 0.4

W25Q80V, Winbond, 8Mbit, serial flash memory, SPI, V = 2.7V - 3.6V:
http://elinux.org/images/f/f5/Winbond-w25q32.pdf

Code:

Absolute Maximum Ratings

Parameters      Symbol  Range
-----------------------------------
Supply Voltage  VCC     -0.6 to 4.0

The supply voltage for the SDRAM is also 1.8V, with an absolute maximum of 2.3V. Therefore you could kill more than just the ROM if you attempted to program it in-circuit via a chip clip.

H5PS5162GFR, SKhynix, SDRAM, 1.8V, 32Mx16, 512Mbit:
http://www.farnell.com/datasheets/1580326.pdf
http://www.skhynix.com/inc/pdfDownload. ... _H5PS518(6)2GFRseries(Rev1._130628.pdf

Code:

Absolute Maximum DC Ratings

Symbol       Parameter                               Rating
--------------------------------------------------------------------
VDD          Voltage on VDD pin relative to Vss      - 1.0 V ~ 2.3 V
VDDQ         Voltage on VDDQ pin relative to Vss     - 0.5 V ~ 2.3 V
VDDL         Voltage on VDDL pin relative to Vss     - 0.5 V ~ 2.3 V
VIN, VOUT    Voltage on any pin relative to Vss      - 0.5 V ~ 2.3 V

Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the device.

BTW, I don't understand why the patient ROM needed to be physically transferred to the donor PCB. Can't PC3K program the ROM in situ on the donor PCB, and wouldn't you have backed up the patient ROM in a chip reader ASAP as a matter of course?

Assuming that the PCB is unsalvageable, could you use a regular SATA PCB (not SSHD) and extract the adaptives from the patient ROM and transfer them to the donor? Would the SA modules be compatible, and, if not, could you use an appropriate loader to circumvent any incompatibility?

As for the voltage test points, I can see at least 4 inductors/coils. Two are located near the SATA power connector, and another two near the motor controller. These are the landmarks for the onboard switchmode DC-DC converters. Measure the voltages on the load side of each coil. Also confirm the Vcc supply on pin #8 of the ROM.

There is also a 5V TVS diode, but if it were shorted, then your PSU would have shut down.

[fzabkar]

There is a 3.3V linear regulator (1L05C33) near the NAND flash.

ST1L05CPU33R, ST Microelectronics, LDO regulator, 3.3V, 1.3A, marking 1L05C33:
http://www.st.com/web/en/resource/techn ... 186925.pdf

I suspect that the LX7169 device generates a Vcore supply for either the MCU or the flash controller, or both.

LX7169, Microsemi, 3A Step-Down Converter, 3V - 5.5V input:
http://www.electronicsdatasheets.com/do ... format=pdf

I don't know what the two A74 devices do, but I suspect that they, together with the "ET31" device, may consitute a preamp supply of some kind. "ET31" looks like a transformer.

LMV931MG, Texas Instruments, single, 1.8V, RRIO Operational Amplifier, SC70 package, marking A74:
http://www.ti.com/lit/ds/symlink/lmv931-n.pdf

The "6855A" device appears to constitute a DC-DC converter of some kind, but I can't identify the IC.

[Dataq]

Has anyone found a solution to these drives. especially with bad PCB.

[applpp22]

I am not a proffetional , but with my knowledge , I had same problem , after the bios chip swap HDD not spinned , and checks one more time for bios chip.. Little bit of chip misplaced ,,, just a little , again i am resolders that chip with care ,, problem solved and detected ,, so can u try resolder same chip one more time

[pepe]

i had some success with a LED 9C1C error, but not with another one with a different LED msg so far...

[fzabkar]

Has anyone found a solution to these drives. especially with bad PCB.

If someone could at least take some voltage measurements and identify the missing IC markings, then perhaps I could find a way to disable the power to the flash controller and/or NAND. Maybe the drive will then behave as an ordinary HDD.

[Doomer]

Maybe the drive will then behave as an ordinary HDD.

That is highly unlikely