Hmmm, after looking at the pictures of the back of the unit, and scanning through the manual, it doesn't look like it has any line out RCA jacks. You could try the Subwoofer out jacks, but I suspect each of the 2 of them is mono. It does have a HDMI output jack, but that signal wouldn't be recognized by your tape deck as it is digital, not analogue. I think your best bet to record audio from the receiver is going to be a cable that is 1/4" TRS on one end and 2 rca jacks on the other end, connected to your headphone jack on the front of the receiver.