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MacBook、MacBook Pro、MacBook Air用のAC電源アダプタです。引っ張られても安全に外れる整列式の磁気コネクタを採用しています。第一世代 (2006-2012)のMagSafe充電器は、コネクタがやや太いL字型になっています。45W、60W、85Wの3種類があります。

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Repair Magsafe 2 Charger?

Hi all,

I searched around for this, but most charging-related questions lead to troubleshooting the DC-IN, battery, etc and I couldn't find this issue specifically.

I'm an Apple Tech who doesn't have a background in electrical engineering - and made the mistake of daisy chaining a couple surge protectors together. They were like this for a number of months. This caused a few of my Magsafe chargers to go out. I'm curious whether the chargers can be repaired.

The symptoms:

  • The charger does not light up when connected to a machine (regardless of the machine).
  • The system battery icon shows that it's charging, but the status is "Battery is not charging." If I leave the cable connected overnight, the machine will usually charge up.
  • Hence, it seems the charger is providing power, but at a much reduced rate from what it should.

Is there a way to restore it to its former functionality?

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Leave the chargers disconnected from the plugs for a couple of days, then try it. Sometimes magsafe chargers can disable themselves to stop overcharging a device.

Beyond this, I wouldn't bother repairing these. You have to break the casing in half, so it never looks great when you glue it back in place. The only reason I would consider repairing these is if the cable is frayed (but then again, I probably wouldn't bother), there are no schematics for the PCB inside the charging block so it can't be properly diagnosed. You can only repair this on a basis of "component looks bad, replace it".

If the 1st solution doesn't work, I would recommend just buying another from Apple.

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Colin さん、ありがとうございました!
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