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 Post subject: Crucial CT500MX200SSD1 - help identifying NL component
PostPosted: August 24th, 2018, 12:34 
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Joined: September 16th, 2015, 9:06
Posts: 58
Location: Poland
Hello,
Does anyone know what is that? It has NL on it, nothing more.


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 Post subject: Re: Crucial CT500MX200SSD1 - help identifying NL component
PostPosted: August 24th, 2018, 19:04 
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Joined: December 4th, 2012, 1:35
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Location: Adelaide, Australia
Hi, a pic of whole board can help to deduce what component could be in that part of circuit.

SMDs are marked with a marking code, so you would google for something like:
SMD Marking code "NL"

results like:

http://www.s-manuals.com/smd/nl
http://www.josvandijken.nl/smd_codes.php

Once you have a candidate you would verify by looking at the circuit/schematics of other available units and see if it makes sense.


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 Post subject: Re: Crucial CT500MX200SSD1 - help identifying NL component
PostPosted: August 24th, 2018, 19:58 
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Joined: September 8th, 2009, 18:21
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As HaQue has said, context would have been helpful, but I suspect that the part is a 3.3V LDO regulator. I believe it provides a 3.3V supply for the adjacent MSP430 power sequencer/controller. ISTR that the series resistors for Vin and Vout are 10 ohms. If the output is low, then I would be testing the MSP430 for shorts.

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 Post subject: Re: Crucial CT500MX200SSD1 - help identifying NL component
PostPosted: August 25th, 2018, 3:32 
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Pictures attached. It was in the circled area. This little thing gets really hot in seconds. Black stains are from parker not burned.


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 Post subject: Re: Crucial CT500MX200SSD1 - help identifying NL component
PostPosted: August 25th, 2018, 4:29 
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Measure the resistances between ground and the 2.8V/3.3V test points.

Check that the 10 ohm resistors are not open or stressed.

I suspect that the MSP430 IC will be shorted to ground.

BTW, I'm guessing that the regulator was probably OK.

TLV70028DSER/T, Texas Instruments, 200mA, 2.8V, Low-IQ, LDO Regulator, marking NL, WSON-6:
http://www.ti.com/lit/ds/symlink/tlv700.pdf


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 Post subject: Re: Crucial CT500MX200SSD1 - help identifying NL component
PostPosted: August 25th, 2018, 7:07 
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Resistors are not open. Regulator is soldered.


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 Post subject: Re: Crucial CT500MX200SSD1 - help identifying NL component
PostPosted: August 25th, 2018, 14:10 
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@melvin, if you measure the resistance between ground and the "0.8V" test point, you will find that it is approximately 4 ohms. This means that the MSP430 microcontroller is shorted.

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 Post subject: Re: Crucial CT500MX200SSD1 - help identifying NL component
PostPosted: August 25th, 2018, 21:01 
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The following thread has a similar problem:

http://forum.hddguru.com/viewtopic.php?f=10&t=33908

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 Post subject: Re: Crucial CT500MX200SSD1 - help identifying NL component
PostPosted: August 26th, 2018, 2:56 
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Thank you fzabkar,
Yes, resistance is 4,5 ohms. Also the mentioned regulator is cold now, and test points show 0 or 0,8V so more work to be done here.

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