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 Post subject: Re: Crucial MX100 repair after PSU failure
PostPosted: March 20th, 2019, 17:15 
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Joined: September 8th, 2009, 18:21
Posts: 12422
Location: Australia
Does the "48H6ZI" chip have exactly the same markings on both PCBs? If not, then the differences could be in the date/batch code. I'm thinking that "48H" may be the part code, while "6Z" could be the year (2016) and week (26 or 52?).

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 Post subject: Re: Crucial MX100 repair after PSU failure
PostPosted: March 21st, 2019, 5:30 
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Joined: February 27th, 2019, 6:49
Posts: 13
Location: Estonia
Good day!
On donor board there are "54Y6ZI" chip at the same place, as "48H6ZI" on original board. On donor there is another "54Y6ZI", but on original board at the same place is "4C56ZI". I`m thinking it`s the same purpose chip, but don`t know what it does.
Also I repaired broken trace near 25211 and all voltages got rised:
5505VIN=5.2V
Storage caps voltage (pin 10) went up to 12.7V
Input voltage on all regulators also increased to 5.2V - as input voltage from SATA.
But PC still doesn`t recognises SSD... :(
It looks like all is stuck at the software or something like it...
Looks like I have to return original flash and MPS430 chips back to original board and hope that it will help.


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 Post subject: Re: Crucial MX100 repair after PSU failure
PostPosted: March 21st, 2019, 6:43 
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Joined: February 27th, 2019, 6:49
Posts: 13
Location: Estonia
Success!
Needed to put original flash back and drive got recognised and right now copying all important data to external drive.
Fzabkar: Thank you so much for your efford, time and all important advices you gave me. Without your help I wouldn't be able to ressurect this drive.
Also can say, that MPS430 is from donor, and even it's slightly different it still maches this version of PCB.

Again many thanks!


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 Post subject: Re: Crucial MX100 repair after PSU failure
PostPosted: March 21st, 2019, 16:39 
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Joined: September 8th, 2009, 18:21
Posts: 12422
Location: Australia
I still can't identify that mystery part, but I suspect that its markings may be encoded as follows:

    1st char -> year of manufacture
    2nd char -> week
    3rd -> batch/country code

    6ZI -> device code

Congratulations anyway.


Edit:

FWIW, the TPS22920 load switch has a part marking of 6Z and comes in a DBGA package. However, its input voltage range is limited to 3.6V.

http://www.ti.com/lit/ds/symlink/tps22920.pdf

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 Post subject: Re: Crucial MX100 repair after PSU failure
PostPosted: June 27th, 2020, 9:10 
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Joined: June 27th, 2020, 8:58
Posts: 4
Location: europe
Hello

Have a broken m2 drive Micron M600, detected by system, show as uninitialized in disk management, cannot initialize or fix MBR.

Made a measurement with DMM, there is 0 volts across two capacitors, unsure if they are blown or something else in circuit.
Also suspicious look the SATA line voltages, the measurements were done with only power connected to drive.

Any suggestion, what to start replacing?


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 Post subject: Re: Crucial MX100 repair after PSU failure
PostPosted: June 27th, 2020, 17:35 
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Joined: September 8th, 2009, 18:21
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Location: Australia
ISTM that all the supply voltages are OK (3.3V, 2.5V, 1.8V, 1.2V). It's looking like a firmware fault.

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 Post subject: Re: Crucial MX100 repair after PSU failure
PostPosted: June 28th, 2020, 5:38 
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Joined: June 27th, 2020, 8:58
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Location: europe
it is what i thought too at first, but i'm not so sure anymore, few hours before i noticed the drive failed a small screwdriver was dropped on the mainboard just above drive area while the system was on. continuity test with DMM is giving a beep on C1. also measured about -0.01V to -0.06V on few resistors nearby MSP430. this leaves me under impression part of the SoC is not initializing.

do you know what voltages should be on MSP430 pins? it is MSP430V402, looks like it is identical to MSP430G2353 as the latter one is also used in this same drive model according to this review image

Image


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 Post subject: Re: Crucial MX100 repair after PSU failure
PostPosted: June 29th, 2020, 4:55 
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Joined: June 27th, 2020, 8:58
Posts: 4
Location: europe
thought the same at first. small screwdriver was dropped on the mainboard above ssd area an hours before it would no longer boot (haven't noticed immediately because hdd was used for windows). 0 volts across capacitor sounds like a hw problem, DMM beeps with probes on the cap, reading 50 in continuity test, couldn't find other component in parallel with the cap... MSP430V402 looks like is identical to MSP430G2353 (is linking photos from other site not allowed, since my reply was submitted for moderation and it wasn't posted?)


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 Post subject: Re: Crucial MX100 repair after PSU failure
PostPosted: July 8th, 2020, 7:26 
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Joined: July 8th, 2020, 7:01
Posts: 1
Location: Minsk
The power supply is broken. It worked undervoltage by 1.5-2 times. That is, instead of 5 volts 3 volts, instead of 12 volts 8. When I discovered and approached the computer, everything survived except for the SSD. SSD is not detected in the BIOS. The voltage was reduced and not increased, hardly something burned out. Can I use jumpers to try it? They discussed something similar, but my scheme is slightly different. Tell me please what you can try to do. Thank.


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 Post subject: Re: Crucial MX100 repair after PSU failure
PostPosted: Today, 7:32 
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Joined: June 27th, 2020, 8:58
Posts: 4
Location: europe
anyone know which part number is the marked 6pin IC? cannot see the reading on mine, it looks like MX100 drives have them too


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