Instructables

Fixing a Laptop Charging Cable

Picture of Fixing a Laptop Charging Cable
 
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Step 1: Slice off the old sheath

Unplug the charger!

 Slice away the old rubber sheath.  Underneath there is the metal plug, and it should have 2 wires soldered to it.  One is the center of the wire from the charger, and the other is a short one that connects to the metal strands from the outer part of the charger. Try to remember which wire is connect to which part.

Once the rubber plug is removed cut the plug off the cord, cutting off the damaged part of the cord.

Next cut the sheath from around the magnet, and the magnet should slide off the cord.

You should be left with just a plain cord coming out of the transformer box.  

Hold the frayed ends of the solder with the pliers and heat the solder attaching them to the plug to pull them off.  A vise or an extra pair of hands helps with all the soldering.

I have no pictures for this step.

Step 2: Slide things on for future use

Picture of Slide things on for future use
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 You will need the magnet on the wire as well as the large pieces of heat shrink tubing on the cord for later.  Slide the magnet first, then the heat shrink tubing.

Step 3: Figure out which wire goes where

Picture of Figure out which wire goes where
On my connector the negative is the outer part of the connector and the center is the positive.  In the cable the negative is the sheath of strands, and the middle wire is the positive.  I think both are normal.  There is a diagram on the transformer box as well, pictured below.

You can use a multimeter to insure you have the wires correct.

Step 4: Solder the connections

Picture of Solder the connections
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In the fist picture below the outer part is still connected, but I cut away the tubing i had installed before.  

Slide the new tubing onto the wire, and solder them in.  On my plug the middle wire went to the middle connector, and the outer wire went to the outside of the plug.

The third picture below shows the tubes in place so the two wires can short out.


pmsfo2 years ago
I think there is a typo on your last sentence here: "The third picture below shows the tubes in place so the two wires can short out." Shouldn't "can short out" be "can't short out"?
unkn0wn13 years ago
pink heat shrink. lol
why pink?
Fashim3 years ago
Would this work for the middle of the cord, I need to thoroughly put it together so the cables don't come apart.
Fazulka (author)  Fashim3 years ago
It would work... I would tie a little knot so if the cord is pulled it won't pull right on the soldered joint though.
Fashim Fazulka3 years ago
Smart thinking, thanks. I bought the Heat Shrink yesterday.
Fashim Fashim3 years ago
Finally Got it, used an Inline or something like that then taped it with electrical tape and heat shrinked it. It works fine but now the Jack is broken thank god for this instructable.
getbusy214 years ago
The magnet is a ferrite bead. We use them as low pass filters for data wires. I could be wrong but I don't think they have anything to do with power spikes. http://en.wikipedia.org/wiki/Ferrite_bead
http://revision3.com/tzdaily/2007-12-26ferrite
Fazulka (author)  getbusy214 years ago
Thank you for the link.
Fazulka (author)  getbusy214 years ago
 Thanks
What you call a magnet is actually a toroid which is a filter which helps cancel spikes in the power being provided by the power supply.  Removing it could cause other problems not so easy and much more expensive to fix.
Fazulka (author)  winston_smith4 years ago
Thanks, I will add that in.
cyberfux4 years ago
 Good Job!

I don't know how often i had to fix my laptop cords ;-)
I fell over ove cord, the connector brake, my dogs chewed on 3 or 4 cords as puppies, rodents (i live in a farmer village) ate one etc.

I think you could call me "laptop power cord fixing pro", but you made an awesome job!
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