Toshiba POS Terminal ST-A20 SERIES - Manual (Page 9)

2. APPEARANCE
2.2 Available Options
2-3
EO1-12037
LED and CONTROL BUTTON DESCRIPTION
Power LED (Blue)
This is the LED to indicate the power ON/OFF
status of the POS terminal. The blue LED is
illuminated when the power is ON.
HDD LED (Yellow)
The yellow LED is illuminated during the
access to the hard disk drive.
Power Switch
This is the switch to turn the power of the POS
terminal ON or OFF.
Brightness Control
This is used to adjust the brightness of the
operator’s display.
Volume Control
This is used to adjust the volume of the
speaker.