When I wired my headphone jack to my Psone screen it worked perfectly fine, except for the fact that the speakers continue to operate whether the headphones are plugged in or not.
I followed "Life of Brian" 's guide, but I still have this problem. If the headphones are plugged in, the speakers become quieter, but I still hear sound.
I used this jack(http://www.thesource.ca/estore/product.aspx?language=en-CA&product=2740246&catalog=Online&tab=3#more
) because the one on the Psone screen only emitted right audio in the headphones.