While pushing and holding both and DOWN keys, push [POWER] to enter Set Mode.
Rotate to adjust the audio level. Note that a minimum audio level may be pre-programmed. icom icf121 manual
Select the desired channel using the UP/DOWN keys and adjust the volume. If a channel is busy, the "BUSY" indicator will light up. While pushing and holding both and DOWN keys,
While basic settings are user-accessible, complex channel programming requires: Icom IC-F121S-51 Mobile Transceiver - Buy Two Way Radios icom icf121 manual
To start a scan, the microphone must typically be (connected to its hanger). Scanning will automatically stop when the microphone is taken off-hook . Programming the IC-F121
"Set Mode" allows you to customize seldom-changed settings like display backlighting. Turn the radio .