Hello,
Does anyone know what is that? It has NL on it, nothing more.
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| Crucial CT500MX200SSD1 - help identifying NL component http://forum.hddguru.com/viewtopic.php?f=10&t=37292 |
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| Author: | melvin [ August 24th, 2018, 12:34 ] | ||
| Post subject: | Crucial CT500MX200SSD1 - help identifying NL component | ||
Hello, Does anyone know what is that? It has NL on it, nothing more.
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| Author: | HaQue [ August 24th, 2018, 19:04 ] |
| Post subject: | Re: Crucial CT500MX200SSD1 - help identifying NL component |
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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| Author: | fzabkar [ August 24th, 2018, 19:58 ] |
| Post subject: | Re: Crucial CT500MX200SSD1 - help identifying NL component |
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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| Author: | melvin [ August 25th, 2018, 3:32 ] | ||||
| Post subject: | Re: Crucial CT500MX200SSD1 - help identifying NL component | ||||
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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| Author: | fzabkar [ August 25th, 2018, 4:29 ] | ||
| Post subject: | Re: Crucial CT500MX200SSD1 - help identifying NL component | ||
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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| Author: | melvin [ August 25th, 2018, 7:07 ] | ||
| Post subject: | Re: Crucial CT500MX200SSD1 - help identifying NL component | ||
Resistors are not open. Regulator is soldered.
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| Author: | fzabkar [ August 25th, 2018, 14:10 ] |
| Post subject: | Re: Crucial CT500MX200SSD1 - help identifying NL component |
@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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| Author: | fzabkar [ August 25th, 2018, 21:01 ] |
| Post subject: | Re: Crucial CT500MX200SSD1 - help identifying NL component |
The following thread has a similar problem: http://forum.hddguru.com/viewtopic.php?f=10&t=33908 |
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| Author: | melvin [ August 26th, 2018, 2:56 ] |
| Post subject: | Re: Crucial CT500MX200SSD1 - help identifying NL component |
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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