Displays various information or playback elapsed time and so on of the disc.
Playback mode indicators
: Lights up during playback.
: Lights up during pause.
Lights when the total number of tracks and total time of the CD are displayed.
Lights during random playback.
Repeat mode indicators
Lights to match the repeat mode settings.
Folder mode indicator
Lights up when the folder mode is set in the CD-R/CD-RW playback range. link