All the input indicator lamps flash.

• When an abnormal current is output to the SPEAKERS terminals, or when the internal temperature of the USB DAC AMPLIFIER is too high, etc., all the input indicator lamps flash for 5 seconds, and the USB DAC AMPLIFIER turns off automatically.

The power lamp flashes.

• If the AUTO STANDBY switch is set to “ON,” when you are not using the USB DAC AMPLIFIER or when there is no digital signal input to the USB DAC AMPLIFIER for 20 minutes, the USB DAC AMPLIFIER is automatically turned off. Before the USB DAC AMPLIFIER turns off, the power lamp flashes for 1 minute.

The USB FRONT lamp flashes.

• When you connect a device that is not supported by the USB DAC AMPLIFIER to the (USB) port on the front panel, the USB FRONT lamp flashes slowly. Disconnect the device.
• When an abnormal current is being input to the (USB) port on the front panel of the USB DAC AMPLIFIER, the USB FRONT lamp flashes quickly. Check whether there is a problem with the device connected.

The USB REAR, COAXIAL, or OPTICAL input indicator lamp flashes.

• When a signal of a format not supported is input, the corresponding lamp flashes.

The DSEE lamp flashes.

• If you press the DSEE button when the DSEE function setting cannot be changed, the DSEE lamp flashes three times.