The RF digital output of a LaserDisc player is not compatible with the SPDIF coaxial digital inputs of modern surround receivers. You have to use an RF demodulator in order to connect the LD's output to a receiver's coaxial digital input. Like LaserDisc players, RF demodulators are no longer made - you'd need to turn to eBay or Audiogon to track one down. I saw ads on eBay for three models (a Yamaha APD-1 , a Kenwood DEM-999D , and a Pioneer RFD-1 ), all of which were manufactured for use in Japan. There's also this page run by one of the eBay sellers, which I found here while looking for info on your player. As you can tell from the prices, these units don't come cheap. I'd suggest getting your manual out as far as the optical connection is concerned - the optical output may work with PCM content only, which would handle everything except AC-3 LD's. I tried to find a manual for that player, but all I found was a couple pictures and a support page with a link to the warranty...