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AC power adapter for MacBook, MacBook Pro, and MacBook Air. Uses a self-aligning magnetic connector that disconnects safely when tugged. First-generation (2006-2012) MagSafe chargers have a slightly thicker, L-shaped connector. Available in 45 W, 60 W, and 85 W versions.

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Correct wiring of MagSafe power adapter

Hi,

recently I repaired my magsafe adapter because the wire to the end of the power adapter got broken. I repaired it by opening the case and rewired it. My the wiring was it bit loosely and the connection was broken again. Now I wanted to rewire it but, I don't remember which wires belong together.

Here you can see a photo of the adapter. Which of these (the left or the right) belongs to the inner and outer wire of the cable?

http://charges.fotastisch.de/magsafe_rep...

Update

Thanks!

Connected it like you said and checked it with a voltmeter. All works fine :)

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My charger got damaged and i repaired the charger but mistakenly i connected the wire in opposite manner (positive with negative and negative with positive). So, when i reconnect to other chargers it is not working. Please help me.

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Here's a pictorial repair guide on the adapter that may help clarify your endeavor: http://www.instructables.com/id/MacBook-...

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Wikipedia says that the outer pins are ground and the inner pins are +16.5VDC. Your picture shows two wires -- black, and green/brown.

By convention, black is ground, so that would make the other wire +16.5VDC -- therefore, the black wire is the outer pins and the green/brown wire is the inner pins. However, in order to avoid blowing up your expensive computer, please double-check the polarity of your power supply using a voltmeter. (Wikipedia also says that your power supply may measure +6.86V with no load -- so the important thing to measure is the polarity.)

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Apple is now replacing these adapters for free as part of a class action settlement. Since you've already worked on this one they won't replace it but for any others out there that have this issue, take it back to Apple for a free one.

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Do you have any link on this settlement?

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http://news.cnet.com/8301-13579_3-573210...

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Thanks for the link!

It seems that the replacement applies to US customers only, though. Have free replacements been given in the UK too? (I've done a bit of googling but haven't uncovered an answer either way.)

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