Which specific resistor for component 'L8300' on MacBook?

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MacBook Pro 15" Retina Display Mid 2012 Repair

2.3GHz, 2.6GHz, or 2.7GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.7GHz) with 6MB shared L3 cache.

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Peter Miller @petemill

İtibar: 37

1

Gönderildi: 10 Haz 2016

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Which specific resistor for component 'L8300' on MacBook?

I fried a resistor attempting to clear out some water damage on my logic board. It's the one at the bottom of this photo: (edit: see better images added below)

According the the board diagram and spec, I think it's L8300, which is labelled on the spec as 'FERR-220-OHM' and '0805'. However, when I search on digikey our mouser there are hundreds of matches. Does anyone know which one is the right component, and any tips for replacement?

Thanks!

Edit - better images as requested...

Highlight on (stock) photo:

Board diagram component that I think is the right one:

Schematic identifier corresponding to board diagram component:

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oldturkey03 @oldturkey03

İtibar: 835,7b

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Gönderildi: 10 Haz 2016

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@petemill "the one at the bottom of this photo" is really not descriptive. Post an image where you mark the component so that we can check which one it is. You say that you " think it's L8330" that needs to always verified. L8330 does not show up in my schematics. Let us know what the logic board 820-XXXX number is. Reference designator "L" means that the component is an inductor. 0805 is the package size of 0.08" x 0.05" of the component.

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@oldturkey03 thank you for your comment and your advice on how to ask the question better. My mistake, the component is L8300 (not L8330)! I've added 3 photos: one photo with the corresponding area highlighted (this is not my photo, but ifixit's photo), another with the corresponding board diagram location, and another with the schematic location. I hope this helps you help me better!

Peter Miller tarafından 10 Haz 2016

@oldturkey03 do you think this inductor is a good replacement? http://www.mouser.com/ds/2/54/RF2012A-77...

Peter Miller tarafından 11 Haz 2016

@petemill excellent edits and great idea to add the images. Yes, that inductor looks like it would work for your board.

oldturkey03 tarafından 11 Haz 2016

Hello to every one , well it is been 9 years now , but seems this laptop still a great machine ! 15 retina A1398 from 2012 to 2015 !

About the component is a MI0805M221R-10 Ferrite Bead 220 OHM

in this days I was try to get a replace , but some are replacing with a simple wire .....what is this ferrite bead ?asking to AI I get this ....

A ferrite bead is a passive electronic component, essentially a lossy inductor, that suppresses high-frequency noise (like EMI and RFI) by converting electromagnetic energy into heat. It works by adding impedance to high-frequency signals while minimally affecting lower frequencies and DC power. Commonly seen on cables for computers and other electronics, ferrite beads are a simple and affordable way to filter noise and improve signal integrity in various circuits

I get a replace on a old similar board , but very cheap to by online too

hope can help some else in this days

Ciao

analfabetagoloso tarafından 10 Eki 2025

@analfabetag look at it this way and it is simplified. A capacitor stores energy in an electrical field. A Inductor stores energy in a magnetic field. You would use a capacitor to filter (smoothen:-) an electrical circuitry. A inductor will do the same in a magnetic field. Think about all the magnetic interferences you have within a circuit (think audio and video circuitry especially) A ferrite bead inductors primary function is EMI suppression while a wire would inductor is primary for filtering and energy storage. You will see Ferrite Bead inductors mostly on signal lines for noise filtering.

oldturkey03 tarafından 10 Eki 2025

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@oldturkey03 thank you for your comment and your advice on how to ask the question better. My mistake, the component is L8300 (not L8330)! I've added 3 photos: one photo with the corresponding area highlighted (this is not my photo, but ifixit's photo), another with the corresponding board diagram location, and another with the schematic location. I hope this helps you help me better! — Peter Miller
@oldturkey03 do you think this inductor is a good replacement? http://www.mouser.com/ds/2/54/RF2012A-77... — Peter Miller
@petemill excellent edits and great idea to add the images. Yes, that inductor looks like it would work for your board. — oldturkey03
Hello to every one , well it is been 9 years now , but seems this laptop still a great machine ! 15 retina A1398 from 2012 to 2015 !

About the component is a MI0805M221R-10 Ferrite Bead 220 OHM

in this days I was try to get a replace , but some are replacing with a simple wire .....what is this ferrite bead ?asking to AI I get this ....

A ferrite bead is a passive electronic component, essentially a lossy inductor, that suppresses high-frequency noise (like EMI and RFI) by converting electromagnetic energy into heat. It works by adding impedance to high-frequency signals while minimally affecting lower frequencies and DC power. Commonly seen on cables for computers and other electronics, ferrite beads are a simple and affordable way to filter noise and improve signal integrity in various circuits

I get a replace on a old similar board , but very cheap to by online too

hope can help some else in this days

Ciao — analfabetagoloso
@analfabetag look at it this way and it is simplified. A capacitor stores energy in an electrical field. A Inductor stores energy in a magnetic field. You would use a capacitor to filter (smoothen:-) an electrical circuitry. A inductor will do the same in a magnetic field. Think about all the magnetic interferences you have within a circuit (think audio and video circuitry especially) A ferrite bead inductors primary function is EMI suppression while a wire would inductor is primary for filtering and energy storage. You will see Ferrite Bead inductors mostly on signal lines for noise filtering. — oldturkey03

MacBook Pro 15" Retina Display Mid 2012 Repair

Which specific resistor for component 'L8300' on MacBook?

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