iMac 27" EMC 2546 changing a component on the logic board

Question

iMac Intel 27" EMC 2546

모델 A1419 / Late 2012 / 2.9 & 3.2 GHz Core i5 또는 3.4 GHz Core i7 프로세서, ID iMac13,2

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FEYA @feya

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게시일: 2017년 1월 2일

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iMac 27" EMC 2546 changing a component on the logic board

Hi

A have a big problem with my imac, I have to change an electrical component but I don't know the reference ? If somebody know or have an electric laptop schema please ?

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Thanks

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@feya what is the 820-XXXX number on your board?

oldturkey03 의 2017년 1월 2일

Hello oldturkey03

I have only found this reference CJ3B 31PlQMB0070

thx

FEYA 의 2017년 1월 2일

And this reference C023113003FF651AK

FEYA 의 2017년 1월 2일

Feya, I have this exact same problem!! This has to be a design defect. Same resistor blew out on my board and my screen won't come up. Did you find out what the value of the resistor is? Thanks in advance!

Ryan 의 2017년 5월 6일

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Hello oldturkey03

I have only found this reference CJ3B 31PlQMB0070

thx — FEYA
Feya, I have this exact same problem!! This has to be a design defect. Same resistor blew out on my board and my screen won't come up. Did you find out what the value of the resistor is? Thanks in advance! — Ryan

oldturkey03 @oldturkey03 평판: 782.2k 1.1k 893 2.3k · Answer 1 · 2020-12-19T10:43:56-07:00

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oldturkey03 @oldturkey03

평판: 782.2k

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게시일: 2020년 12월 19일

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@feya old question and only answered for completions sake. That is reference designator L9500 which is a 250 Ohm ferrite bead (fixed inductor)in a 0603 package.

You will need to check why it blew the way it did. There should only be 12 Volt on that rail, so make sure you have no short anywhere else.

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iMac Intel 27" EMC 2546

iMac 27" EMC 2546 changing a component on the logic board

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