Chevrolet Optra 2004 Owner's Manual page 149

SCAN: Push and release this knob to scan radio
stations. The radio will go to a station, play for a few
seconds, then go on to the next station. Push this knob
again to stop scanning.
The radio will scan only to stations that are in the
selected band and only to those with a strong signal.
Setting Preset Stations
The six numbered pushbuttons let you return to your
favorite stations. You can set up to 18 stations (six FM1,
six FM2, and six AM), by performing the following steps:
1. Turn the radio on.
2. Press AM/FM to select FM1, FM2, or AM.
3. Tune in the desired station.
4. Press and hold one of the six numbered pushbuttons
for longer than two seconds. The pushbutton number
will flash on the display when the station has been
set. Whenever you press that numbered pushbutton,
the station you set will return.
5. Repeat the steps for each pushbutton.
Automatic Store
You can also automatically store six FM1 preset stations
with the strongest reception in the region. Press the AST
button for longer than one second. Once the stations are
stored, the radio will switch to FM1 and the first preset
station will begin to play. FM-A will appear on the display
when listening to the automatic stored stations. Press the
AM-FM button to cancel automatic store.
Setting the Tone (Bass/Treble)
SOUND (Bass/Treble): Press this button until BAS
appears on the display. Then turn the volume knob to
increase or to decrease the bass. The display will show
the bass level. When finished making your selection,
press this button to select the bass level.
Press this button until TRE appears on the display.
Then turn the volume knob to increase or to decrease
the treble. The display will show the treble level.
When finished making your selection, press this button
to select the treble level. If a station is weak or noisy,
you may want to decrease the treble.
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