Sony MDS-JE520 Mini Disc Player "optical cable signal unlock" Questions

optical signal. There are adaptor boxes on eBay which decode 5.1 & 7.1 optical signals to an optical signal the older MD can read and record from. Try selecting another source like analog RCA. The

optical cable. Hence the error message you see. If you want to record using RCA cables, you will have to set your MD recoder so to use analog input. Press the INPUT key repeatedly to select the Analog