Furuno RC-1500-1T Operator's Manual page 45

2.5 Loudspeaker, Buzzer On/Off
1. Display the DSC standby screen or radiotelephone setting screen.
2. Press the [7/ ] key to turn the loudspeaker and the alarm generated for ordinary messages
(others than distress and urgency) on/off. The message SOUND: ON or SOUND: OFF
appears with each pressing of the key. The indication OFF appears at the lower-right side of
the DSC standby and radiotelephone setting screens when the loudspeaker is turned off.
3. When the loudspeaker is on, press
0 to 63. Current volume setting is shown by both bar graph and numeric at the bottom of the
display.
Note: The volume setting is set to 5 and the loudspeaker is ON whenever the unit is powered on.
MODE : TELEPHONE
CH:12034
WATCH KEEPING
TX : 12 329.0
RX : 13 176.00
POWER : HIGH
TUNE
VOLUME
Press [7/ ].
MODE : TELEPHONE
CH:12034
WATCH KEEPING
TX : 12 329.0
SOUND : OFF
RX : 13 176.00
POWER : HIGH
TUNE
VOLUME
About two seconds later
MODE : TELEPHONE
CH:12034
WATCH KEEPING
TX : 12 329.0
RX : 13 176.00
POWER : HIGH
TUNE
VOLUME
Press [7/ ].
SOUND : ON
About two seconds later
to lower the volume;
KHZ
KHZ
Speaker ON
32
KHZ
KHZ
32
KHZ
KHZ
Speaker OFF
OFF
to raise it. The setting range is
2-5