please help identify a smd component, thanks K2134 - Page 1
Forum section: electronics / repair

author: wyalin
author_rank: Newbie
timestamp: January 17, 2019, 12:07:57 am
content: 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.

author: fzabkar
author_rank: Super Contributor
timestamp: January 17, 2019, 03:58:52 am
content: 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.

author: wyalin
author_rank: Newbie
timestamp: January 17, 2019, 03:15:07 pm
content: thanks for the reply, I will shoot a picture later this evening

author: Samogon
author_rank: Frequent Contributor
timestamp: January 17, 2019, 04:44:54 pm
content: Could be mosfet

author: wyalin
author_rank: Newbie
timestamp: January 17, 2019, 06:29:09 pm
content: I thought mosfet are 6 pins, thanks

author: wyalin
author_rank: Newbie
timestamp: January 18, 2019, 03:17:43 am
content: this is the pic covering more PCB, thanks

author: fzabkar
author_rank: Super Contributor
timestamp: January 18, 2019, 08:39:16 pm
content: 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.

author: wraper
author_rank: Unknown
timestamp: January 18, 2019, 08:54:18 pm
content: 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.

author: wyalin
author_rank: Newbie
timestamp: January 18, 2019, 09:00:53 pm
content: connector JCCG4 is blank, didn't used.US2: JFB 1st line, J61 2nd line,UC7: V2 and Y in other directionthanks

author: fzabkar
author_rank: Super Contributor
timestamp: January 19, 2019, 01:28:40 am
content: 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.

author: amyk
author_rank: Super Contributor
timestamp: January 19, 2019, 02:24:54 am
content: RP112N211B

author: fzabkar
author_rank: Super Contributor
timestamp: January 19, 2019, 03:43:12 am
content: http://chip.tomsk.ru/chip/chipfile0-x.nsf/all/78F06B21FB4C733B46257EEA005E33A8/$File/rp112-e.pdfI found the same part, but its datasheet shows pin #4 as NC. Wouldn't that exclude it?

author: wraper
author_rank: Unknown
timestamp: January 19, 2019, 03:47:20 am
content: Quote from: fzabkar on January 19, 2019, 03:43:12 amDunno, 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.

author: wyalin
author_rank: Newbie
timestamp: January 30, 2019, 12:28:53 am
content: Thanks, I am going to looking around this part. Any suggestions where to buy it?

author: wyalin
author_rank: Newbie
timestamp: January 30, 2019, 01:33:25 am
content: can I use a 2.2v lod? I can not find the rico 2.1v lod. or any substitute, thanks