The power turns off even though I haven't done anything.

This unit is equipped with a "standby function" that turns the power off as an energy-saving measure when no operation has been performed for a specific amount of time.

Upon factory shipment, this standby mode is set to 20 minutes.

This setting can be changed at UTILITY.

Setting procedure

1. Press DISPLAY (UTILITY) for at least 1 second. The UTILITY screen appears on the display.
2. Use the rotary selector to select "AUTO STANDBY", then press the rotary selector.
3. Turn the rotary selector to set the time.

20 minutes, 40 minutes, 60 minutes, off (power does not turn off automatically)

4. Press the rotary selector to complete the setting.