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 Post subject: Unknown "Knocked-off" component :( Please help.
PostPosted: January 9th, 2024, 6:20 
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Joined: December 7th, 2018, 19:39
Posts: 8
Location: Earth
Hi all,

I have accidently knocked-off a component from my NVME. I have found the photos of the same model and another model that has similar design.

Here are the photos:

This is my NVME:

Attachment:
s-l1600.jpg
s-l1600.jpg [ 383.32 KiB | Viewed 1333 times ]


Here is the same layout but 512gb version:

Attachment:
yyy.PNG
yyy.PNG [ 851.37 KiB | Viewed 1333 times ]


And here is the knocked-off component:

Attachment:
mkey.PNG
mkey.PNG [ 505.48 KiB | Viewed 1333 times ]


I couldn't determine this part. May be a filter or a resistor. I don't know. Thank God the traces aren't ripped off.

I really need help.

Thanks.

BTW, I've tried 10k resistor but no success :( PC doesnt recognize the SSD.


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 Post subject: Re: Unknown "Knocked-off" component :( Please help.
PostPosted: January 9th, 2024, 12:28 
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Joined: September 8th, 2009, 18:21
Posts: 15540
Location: Australia
If you can tell us the part markings on the IC, I could at least try to find its datasheet.

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 Post subject: Re: Unknown "Knocked-off" component :( Please help.
PostPosted: January 9th, 2024, 12:31 
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Joined: December 7th, 2018, 19:39
Posts: 8
Location: Earth
fzabkar wrote:
If you can tell us the part markings on the IC, I could at least try to find its datasheet.

Thanks for reply :)

DZ0
376


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 Post subject: Re: Unknown "Knocked-off" component :( Please help.
PostPosted: January 9th, 2024, 13:03 
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Joined: September 8th, 2009, 18:21
Posts: 15540
Location: Australia
That IC is a load switch. It appears to be providing some level of protection at the 3.3V input to the SSD.

The top end of the missing component appears to be connected to the 3.3V input. You should verify this by performing a continuity test with a multimeter, or by observing the vias on the other side of the PCB.

The bottom end is connected to pins 1, 2 and 3 of the IC. Those are the power inputs.

Therefore, the only thing that makes sense for that missing component is an inductor. If so, then you can bridge it with a wire link or a blob of solder.


R5541K001D, Ricoh, N-ch load switch, 0.6V - 4.8Vin, 3A, 18 mOhm, marking DZ0+3XX, DFN(PLP)1216-6G:
https://static5.arrow.com/pdfs2/2019/1/15/21/23/22/585902/ric_/auto/r5541-ea.pdf

M.2 pinouts:
https://www.hddoracle.com/viewtopic.php?f=106&t=2506


Attachments:
R5541K001D_block_diagram.gif
R5541K001D_block_diagram.gif [ 20.15 KiB | Viewed 1234 times ]
R5541K001D_application.gif
R5541K001D_application.gif [ 12.94 KiB | Viewed 1234 times ]
R5541K001D_pin_definitions.gif
R5541K001D_pin_definitions.gif [ 17.13 KiB | Viewed 1234 times ]
R5541K001D_pinout.gif
R5541K001D_pinout.gif [ 3.91 KiB | Viewed 1234 times ]

_________________
A backup a day keeps DR away.


Last edited by fzabkar on January 9th, 2024, 13:08, edited 1 time in total.
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 Post subject: Re: Unknown "Knocked-off" component :( Please help.
PostPosted: January 9th, 2024, 13:07 
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Joined: February 22nd, 2023, 13:49
Posts: 65
Location: Eastern Europe
My opinion: the missing part is the fuse (0 Ohm).
Because the key does nothing except soft start...


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 Post subject: Re: Unknown "Knocked-off" component :( Please help.
PostPosted: January 9th, 2024, 17:16 
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Joined: December 7th, 2018, 19:39
Posts: 8
Location: Earth
fzabkar wrote:
Therefore, the only thing that makes sense for that missing component is an inductor. If so, then you can bridge it with a wire link or a blob of solder.


You are a hero "fzabkar" :)

I've removed the 10k resistor and soldered a filter(inductor). And..... It WORKED. 8)

I really do appreciate your help and knowledge. Also do respect :cool:

Thank you.


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 Post subject: Re: Unknown "Knocked-off" component :( Please help.
PostPosted: January 9th, 2024, 17:17 
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Joined: December 7th, 2018, 19:39
Posts: 8
Location: Earth
SWM wrote:
My opinion: the missing part is the fuse (0 Ohm).
Because the key does nothing except soft start...


Thank you.

This forum has a lot of heroes i guess. :)


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