Having the display and the illumination lamp off
The display circuit operation can be stopped to minimize noise from the display and the display circuit which could interfere with the analog audio output signal.
Each time you press DISPLAY, the display and the illumination lamp (blue) switch on/off at the same time.
If you operate the VOLUME knob or another control when the display is off, the display turns on again. When operation is finished, the display turns off automatically after approximately 2 seconds.