Sony PCV-L640 - Manual (Page 20)

VAIO Slimtop ™ LCD Computer User Guide
20
Using a Headphone or Microphone
When you connect a microphone or headphone to your computer, attaching a
ferrite core will reduce electrical interference.
1 Attach the (supplied) ferrite core at the end of the headphone or microphone
cable closest to the computer.
2 Wrap the cable through the center of the ferrite core.
The following illustration shows how to attach the ferrite core when you are using
both a headphone and a microphone.
The LCD and keyboard cables already include a ferrite core. Do not remove the
ferrite core from these cables.
Plugs connected to
Microphone and
Ferrite core
the computer
headphone cables