Instructions
Connect the RCA cable to the back of the PlayStation 3. The PlayStation 3 side of the cable does not have the three different colored prongs.
Plug the yellow prong from the RCA cable into the back of the Onkyo receiver. Be sure you plug the prong into a yellow video-in jack.
Plug the red and white prongs from the RCA cable into the back of the Onkyo receiver. Be sure you plug the prongs into an audio-in jack that is red and white and underneath the yellow prong.