Eclipse - Fujitsu Ten 316SW - Manual (Page 7)

Part Names and Functions
Volume adjustment knob
This knob is used to adjust the volume.
L.P.F. adjustment knob
This knob is used to adjust (cut) high-range
frequencies.
The adjustment range is 40--200 Hz.
This knob position is 120Hz in the center.
Automatic power switch
This switch turns the automatic power function
on and off.
When the automatic power switch is ON, the
automatic power function operates and the
unit switches to standby mode if no input
signal is received during a 5-minute period.
(The power indicator will change from blue to
red.)
When an input sinal is received once more,
the power will turn back on automatically.
(The power indicator will change from red to
blue.)
If this unit is used for signals at extremely low
volumes, set this switch to OFF to prevent
incorrect operation.