Panasonic Toughbook CF-52ELNBD2M Reference Manual page 4

Key Combinations
Key
Fn+F4
Speaker on/off
NOTE
Beeps do not sound if you turn off the speaker sound.
Fn+F5
Volume
(Fn+F5= down / Fn+F6= up)
Fn+F6
NOTE
When fine-tuning the sound volume, press and hold Fn, and press F5 or
F6 intermittently.
This does not work on beeps or speakers connected to the USB port.
Fn+F7
Activate sleep (
Fn+F9
Remaining battery charge
(When the battery pack is inserted in the computer)
Fn+F10
Activate hibernation (
Function
page 7)
page 7)
4
Pop-up icon
OFF ON
(MUTE)
page 14