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Sony NF421 User Manual

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If it is hard to hear the 
FM broadcast due to poor 
reception
1  While listening to the radio, press 
DISPLAY/MENU until the menu screen 
appears.
2  Press 
 or 
 to select “OPTION,” then 
press 
/ENTER.
3  Press  or  to select “MONO/ST,” then 
press 
/ENTER.
4  Press  or  to select “MONO,” then 
press 
/ENTER.
The noise will be reduced but the radio will 
play in monaural.
Protecting your hearing
The AVLS (Automatic Volume Limiter 
System) function keeps the maximum volume 
down to protect your hearing.
1  While listening to the radio, press 
DISPLAY/MENU until the menu screen 
appears.
2  Press 
 or 
 to select “OPTION,” then 
press 
/ENTER.
3  Press  or  to select “AVLS,” then press 
/ENTER.
4  Press  or  to select “ON,” then press 
/ENTER.
To cancel the AVLS function
Perform steps 1 - 4, changing the AVLS 
setting to “OFF.”
Turning off the radio 
automatically
You can set the radio to turn off automatically 
within a range of 1 minute to 99 minutes by 
1 minute.
1  While listening to the radio, press 
DISPLAY/MENU until the menu screen 
appears.
2  Press 
 or 
 to select “OPTION,” then 
press 
/ENTER.
3  Press  or  to select “TIMER,” then 
press 
/ENTER.
4  Press  or  to select the length of time 
you want to set from “1 min” to “99 min,” 
then press 
/ENTER.
To check the length of time before the 
radio is automatically turned off
During play, perform steps 1 - 4.
To cancel the TIMER function
The TIMER function for the radio will be 
canceled:
•  When you select “OFF” in step 4 of 
“Turning off the radio automatically.”
•  When you turn off the radio.
•  When you start playing a CD.
When listening to the radio 
on the battery
If you connect the external power source plug 
to the DC IN 3 V jack of your CD player, the 
CD player will turn off. Turn it on by pressing 
RADIO ON/BAND•MEMORY to continue 
listening to it.
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