Author Topic: please help identify a smd component, thanks K2134  (Read 816 times)

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Offline wyalin

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please help identify a smd component, thanks K2134
« on: January 17, 2019, 12:07:57 am »
Hi, I am new here, thanks advance for the help.

This is from dell xps 9365 mother board, it is 5 pin, marked with k2134. Can not find it from anywhere. Appreciated if you could help me identify it and tell me the substitute or buying website.
 

Offline fzabkar

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Re: please help identify a smd component, thanks K2134
« Reply #1 on: January 17, 2019, 03:58:52 am »
It might help if we could see the component in the context of its surroundings. It might also help to decipher the date codes on known ICs so that we could determine if "134" or "34" are date or batch codes.
 

Offline wyalin

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Re: please help identify a smd component, thanks K2134
« Reply #2 on: January 17, 2019, 03:15:07 pm »
thanks for the reply, I will shoot a picture later this evening
 

Offline Samogon

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Re: please help identify a smd component, thanks K2134
« Reply #3 on: January 17, 2019, 04:44:54 pm »
Could be mosfet
 

Offline wyalin

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Re: please help identify a smd component, thanks K2134
« Reply #4 on: January 17, 2019, 06:29:09 pm »
I thought mosfet are 6 pins, thanks
 

Offline wyalin

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Re: please help identify a smd component, thanks K2134
« Reply #5 on: January 18, 2019, 03:17:43 am »
this is the pic covering more PCB, thanks
 

Offline fzabkar

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Re: please help identify a smd component, thanks K2134
« Reply #6 on: January 18, 2019, 08:39:16 pm »
Where does connector JCCG4 go? What are the markings on US2 and UC7?

The YWW (Year/Week) date codes on other ICs (636, 642) would suggest a manufacture date of October 2016. Unfortunately that doesn't help me.
« Last Edit: January 18, 2019, 08:43:48 pm by fzabkar »
 

Online wraper

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Re: please help identify a smd component, thanks K2134
« Reply #7 on: January 18, 2019, 08:54:18 pm »
IMO looks like LDO in SOT23-5. Most of them have pin 1 - vin and 5 - vout, and there are thick traces connected to those. Pin 2 - GND, other pins are less definite but 3 - often is EN and 4 - ADJ or noise reduction for attaching capacitor.
« Last Edit: January 18, 2019, 09:01:43 pm by wraper »
 

Offline wyalin

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Re: please help identify a smd component, thanks K2134
« Reply #8 on: January 18, 2019, 09:00:53 pm »
connector JCCG4 is blank, didn't used.
US2: JFB 1st line, J61 2nd line,
UC7: V2 and Y in other direction
thanks
 

Offline fzabkar

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Re: please help identify a smd component, thanks K2134
« Reply #9 on: January 19, 2019, 01:28:40 am »
Sorry, I can't find any suitable candidate.

If UC7 is this part …

https://www.onsemi.com/pub/Collateral/MC74VHC1G08-D.PDF

… then it would appear that the output of UC7 connects to pin 4 of the K2134. If correct, then this would suggest that pin 4 of US3 is a logic level input.
« Last Edit: January 19, 2019, 01:41:48 am by fzabkar »
 

Offline amyk

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Re: please help identify a smd component, thanks K2134
« Reply #10 on: January 19, 2019, 02:24:54 am »
 

Offline fzabkar

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Re: please help identify a smd component, thanks K2134
« Reply #11 on: January 19, 2019, 03:43:12 am »
http://chip.tomsk.ru/chip/chipfile0-x.nsf/all/78F06B21FB4C733B46257EEA005E33A8/$File/rp112-e.pdf

I found the same part, but its datasheet shows pin #4 as NC. Wouldn't that exclude it?
 

Online wraper

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Re: please help identify a smd component, thanks K2134
« Reply #12 on: January 19, 2019, 03:47:20 am »
http://chip.tomsk.ru/chip/chipfile0-x.nsf/all/78F06B21FB4C733B46257EEA005E33A8/$File/rp112-e.pdf

I found the same part, but its datasheet shows pin #4 as NC. Wouldn't that exclude it?
Dunno, remove part and check if the trace from pin 4 goes somewhere further under the part. They might just run trace through unconnected pin. In any case it would be useful to check where pins are actually connected. Especially if pin 2 is connected to GND.
 

Offline wyalin

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Re: please help identify a smd component, thanks K2134
« Reply #13 on: January 30, 2019, 12:28:53 am »
Thanks, I am going to looking around this part. Any suggestions where to buy it?
 

Offline wyalin

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Re: please help identify a smd component, thanks K2134
« Reply #14 on: January 30, 2019, 01:33:25 am »
can I use a 2.2v lod? I can not find the rico 2.1v lod. or any substitute, thanks
 


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