Aiwa NSX-MTD9 - Manual (Page 49)

Before or during CD play, you can reserve up to 15 tracks to be played after the current track. Each reservation is
cleared when it finishes playing.
Use the remote control.
1 Press CD and load the discs.
2 Press PRGM once.
3 Press DISC DIRECT PLAY, then press one of the numbered buttons 1-5 within 3 seconds to select a disc. Then
press the numbered buttons 0-9 and +10 to program a track.
Reserved disc number Reserved track number
4 Repeat step 3 to reserve other tracks.
5 Press to start play.
After a track is played, it is cleared from the program.