Question Schematic or service description required for SanDisc Ultra 3D SSD SDSSDH3-1T00 ?

[Schemus]

Hello everyone.
I'm looking for the description of the service contacts on the PCB for a SanDisc Ultra 3D SSD SDSSDH3-1T00. There are 14 contacts on the PCB, seven on the component side and seven on the conductor side, arranged opposite each other. Alternatively, a schematic of the SSD would also work for me, but I don't think these are so easy to obtain. The power supply is defective on the disk and I'm hoping that I can get the data down if I bypassing the voltage regulation. I have the necessary equipment, but I don't have the description of this PCB.

Thanks a lot in advance for your help.

Best regards
Schemus

 

[fzabkar]

Upload detailed photos of both sides and I'll show you the voltage test points.

 

[Schemus]

Hi, This should be a simple exercise:

Best regards
Schemus

 

[fzabkar]

The ACT9040VMxxx PMIC appears to have 4 buck converters. Measure the voltage between ground and each of the 4 inductors (V1 - V4). The associated capacitors appear to be C116, C127, C119 and C124, but I can't be sure.

https://i.postimg.cc/g22rfsmN/PMIC.jpg

This is a different PMIC from the same manufacturer:

https://www.hddoracle.com/viewtopic.php?p=24271#p24271

 

[Schemus]

Oh whow, thanks a lot! I will start the measuring equipment....

 

[Schemus]

Hi, The measured values at all of the four inductors are 0V. It seems like the ACT9040VM509 (?) is dead.
Desoldering does not seem to be an option. The mass around the chip seems to be resin and does not dissolve with heat. I would like to suppply the voltages externally. But for this I need the points where I can supply them and the voltage values, of course.

Best regards
Schemus

 

[fzabkar]

Measure the voltages at the input to the PMIC -- capacitors C115, C118, C123, C116. They should be 5V.

If you don't find 5V, measure the voltage at TVS diode D2 on the other side near the SATA connector. If you see 5V at the diode, then measure the pins of U5. That's a MOSFET.

I can't see the marking, but I think this is the datasheet for the MOSFET:

PMPB20XPE, NXP, -20V, -10.3A, P-channel Trench MOSFET, marking 1D, DFN2020MD-6 (SOT1220):
https://assets.nexperia.com/documents/data-sheet/PMPB20XPE.pdf

 

[Schemus]

OK, I measured at C115, C118, C123 and C126 the 5V. The TVS D2 have I changed first. This was my first suspicion. All signs point to the BUK converter and this is the worst case from my point of view.

Is there any chance to get the voltage values and points where I can this connect? I have precisely adjustable power supplies to do this.

 

[fzabkar]

I think one of the pros at HDD Guru was able to recover an SSD by using external supplies, but the problem is that they need to be powered up in a particular sequence. I don't know the voltages, but some searching at hddguru.com may turn up a similar SSD.

Before you proceed, I would measure the resistance between ground and each of V1-4. Hopefully none of the outputs are shorted.

 

[Schemus]

Thanks a lot for your help. I will keep looking. Your information has already been very helpful.