Samsung TS-H552B-MIAH - Manual (Page 24)

Storing/Cleaning Drive and Disc
On/Off Lamp Meaning
Disc Lead-In Green: Blinks every 0.3 seconds.
Writing Green: Blinks every 0.3 seconds.
Reading Green: Blinks every 0.3 seconds.
Audio Playback [Analog Mode] Green: Blinks every 0.3 seconds.
Audio Playback [Digital Mode] Green: Blinks every 0.3 seconds.
Standby Off
No Disc Off
The indicator light turns off when the drive is not in use (standby) after disc lead-in.