Monday, 5 January 2015

What's the purpose of this bulky cylindrical part near the plug end of a laptop charger cord?



I want to fix my laptop charger cord, I used a multimeter to check the voltage and it gives me less than one volt. It feels very flexible near the plug, but I don't know if I can cut before or after the part marked in red. What is this part used for? Can I remove the red part?enter image description here



Answer



It's a ferrite bead. It suppresses high frequency noise.


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