I couldn't say for sure to YOUR onkyo reciever but but works fine via hdmi to my Yamaha RX-V1600.
Check out the official panasonic s52 thread
http://www.avsforum.com/avs-vb/showthread.php?t=665559
Check out the official panasonic s52 thread
http://www.avsforum.com/avs-vb/showthread.php?t=665559