Kenwood TH-28A Instruction Manual page 50

Switch-off Timer Setting
If you press the F key, then the 7 key, in clock
display mode, you enter the switch-off timer setting
mode, and the TIMER.OFF indicator and the "Hour"
display will flash.
Set the "Hour" display to the time you want the
transceiver to turn off with the Tuning control.
3 Press the M key.
4 Set the 'Minute" display to the time you want the
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transceiver to turn off with the Tuning control.
Press the M key.
Timer Start/Stop
If you press the F key, then the 5 key, in clock
display mode, the switch-on timer starts or stops.
When the switch-on timer starts, the TIMER.ON
indicator lights on the LCD, and the transceiver is
switched on at the set time every day.
If you press the F key, then the 8 key, in clock
display mode, the switch-off timer starts or stops.
When the switch-off timer starts, the TIMER.OFF
indicator lights on the LCD, and the transceiver is
switched off at the set time every day.
Alarm Function
If you press the F key, then the 6 key, in the switch-
on timer display mode, the alarm function turns on,
and an alarm sounds for 25 seconds when the
switch-on timer set time is reached.
The alarm stops when you press any front panel key.