1993 Buick Park Avenue Owner's Manual - Page 149

It allows you to mute the radio or tape player. Press to mute; press again to listen. The sound balance for the Delco-Bose radio is preset. The Lower Knob Turn the lower knob to tune radiostations. The tune knob increases and decreases station frequency when it is held slightly rotated against the spring load. Push it to get AM or FM frequency. FADE The control behind the lower knob moves the sound between your front and rear speakers. Notice the display arrow to see how FADE is set. To Play This Radio PWR To turn the radio on, press the PWR button. RCL It tells you the time or the radio frequency. When the ignition is off, push RCL to display the time. With the radio on,and the time displayed, push it to seethe frequency. The Upper Knob The upper knob does these things: It controls the volume. The volume knob increases and decreases volume when it is held slightly rotated against thespring load. SEEK 4 or b Pressing the SEEK 4 or b will cause the receiver to seek the next lower or higher station and stop.