Federico Zarini

I apologize for the topic perhaps already addressed, I have browsed the entire old forum up until today. I have a Sony MPD-AP20U unit (MP3 CD/DVD player) which comes with an RM-CRX20 remote control. currently it is working with an RM-MZR50 but not completely: the lyrics are not complete, the backlight is not there. In the remote control guide I don't find any references to the compatibility of the original RM-CRX20 with any other model working on Sony MD. thanks if you help me understand