Lexus GS300 1998 Owner's Manual page 230

AIR CONDITIONING AND AUDIO
Push this knob to turn the audio system on and off. Turn
this knob to adjust the volume.
The system turns on in the last mode used.
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"Type A "Type B
Push "AM", "FM1/2", "TAPE" or "CD" to turn on that
mode. The selected mode turns on directly.
Push these buttons if you want to switch from one mode to
another.
If the tape or disc is not set, the cassette player or compact disc
player does not turn on.
You can turn off the cassette player by ejecting the cassette
tape. If the audio system was previously off, then the entire
audio system will be turned off when you eject the cassette
tape. If another function was previously playing, it will come
on again.
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