Q: How does the FM and DAB radio of the Auna 388DAB+ work?

Operation of the FM and DAB radio FM Radio (manual tuner): Connect the antenna to the antenna socket (29) at the back of the device Press the Function button (10) to select FM mode Use the up/down tuner buttons to manually search for stations The LCD screen displays a ST indicator when you are listening in stereo DAB Radio (digital): Press the Function button (10) to activate DAB mode Press Scan to start an automatic search (the device scans from bottom to top or top to bottom in about 2 seconds on channels 11b-12d) The screen successively displays the station name, frequency, bit rate, and signal strength Saving stations: You can save up to 40 stations in total (20 FM and 20 DAB) To save a station: hold the Mem/Clock button for four seconds Adjust the volume with the control (19) Both radio modes (FM and DAB) offer mono and stereo. DAB+ provides better digital quality and more stations available in your area.

Question 1

How does the FM and DAB radio of the Auna 388DAB+ work?

Accepted Answer

Operation of the FM and DAB radio

FM Radio (manual tuner):

Connect the antenna to the antenna socket (29) at the back of the device
Press the Function button (10) to select FM mode
Use the up/down tuner buttons to manually search for stations
The LCD screen displays a ST indicator when you are listening in stereo

DAB Radio (digital):

Press the Function button (10) to activate DAB mode
Press Scan to start an automatic search (the device scans from bottom to top or top to bottom in about 2 seconds on channels 11b-12d)
The screen successively displays the station name, frequency, bit rate, and signal strength

Saving stations:

You can save up to 40 stations in total (20 FM and 20 DAB)
To save a station: hold the Mem/Clock button for four seconds
Adjust the volume with the control (19)

Both radio modes (FM and DAB) offer mono and stereo. DAB+ provides better digital quality and more stations available in your area.

Question 2

My Auna AV2CD850BT hifi system won't turn on

Accepted Answer

If your Auna AV2CD850BT hifi system won't turn on, start by checking the power supply. Make sure the power cable is properly connected to a functioning wall outlet (230V 50 Hz), test the outlet with another device (lamp, charger) to confirm it works, and inspect the cable for any damage or tears.

Next, check the ON/OFF switch located at the back of the device (point 15 on the back panel). This switch can be the most common cause when the device does not turn on: make sure it is in the ON position.

Your system may also be in standby mode without appearing to be on. Press the STANDBY button on the front panel or use the remote control to reactivate the device. If the device turns on but you see or hear nothing, check that the system is not in mute mode: press the MUTE button or adjust the volume with the control buttons.

Also, check that the speakers are properly connected to the binding posts at the back (Zones 1 to 4). A poor connection or an unconnected speaker can prevent the device from functioning properly. Ensure that the bare wires of the speakers do not touch each other, which could cause a short circuit.

If you have any doubts about the polarity of the connections, important reminder: ensure that the + and - connections are correctly made for each zone. Incorrect polarity will produce an unnatural or hollow sound, but will not prevent the device from turning on.

If none of these checks resolve the issue, the system may have an internal fault. Do not attempt to repair the device yourself as this would void the 2-year warranty. Contact a qualified technical service or Auna customer support directly (Chal-Tec GmbH, Wallstraße 16, 10179 Berlin, Germany).

Question 3

How to resolve the issue when the remote control of the Auna AV2CD508 hi-fi system does not work?

Accepted Answer

If the remote control of your Auna AV2CD508 hi-fi system is not working, here are the steps to identify and resolve the issue.

First, check the battery status. Open the battery compartment at the back of the remote control and make sure it is not discharged. If it seems old or if you haven't changed it recently, replace it with a new battery. Be sure to insert it correctly in the right direction (follow the + and - indications). A mispositioned battery can prevent electrical contact and immobilize your remote control.

Next, check the line of sight between the remote control and the device. The Auna AV2CD508 remote control works via infrared. Make sure no object is blocking the path between the infrared sensor located at the front of the device and the remote control. Gently clean the system's sensor with a clean, dry cloth to remove any dust that may interfere with signal reception.

Maintain the distance and angle of range. Use the remote control at a reasonable distance from the device. If you are too far away or at too narrow an angle, the infrared signal will not be received correctly. Reduce the distance between the remote control and the system.

Restart your hi-fi system. Sometimes, a simple restart resolves communication issues. Turn off the Auna AV2CD508 system, unplug it from the electrical outlet for a few minutes, then plug it back in and turn it on. Wait 3 to 4 seconds for the device to be fully operational before testing the remote control again.

If after all these checks the remote control still does not work, the problem may stem from a hardware malfunction of the sensor or the remote control itself. In this case, contact customer service or a specialized retailer for further assistance.

Question 4

How to resolve a Bluetooth connection issue with the Auna Ultrasonic CD HiFi system?

Accepted Answer

The Auna Ultrasonic CD HiFi system uses Bluetooth technology to connect to your devices. If you are experiencing connection difficulties, follow these steps to troubleshoot the issue:

First connection and pairing: Press the FUNCTION button on the device to switch to Bluetooth mode. The screen will display "BT" and the pairing indicator will blink rapidly. On your phone, tablet, or computer, turn on Bluetooth and look for the device named "KCD818BT", then select it to pair. If a passcode is requested, enter 0000. Once connected, the pairing indicator will remain lit and the screen will display "bt" in lowercase to confirm the connection.

Range and environment: Bluetooth works best within a range of 10 meters in open space. Keep the source device away from any significant physical obstructions (thick walls, closed doors) and other electronic devices that may cause interference. If you are too far away or there are too many obstacles, the signal may weaken or be lost. Move closer to the system and try the connection again.

Volume issues: Check that the volume on your source device is not too low. Insufficient volume may be interpreted as the absence of an audio signal, which can cause automatic disconnection or the system to stop after 15 minutes of inactivity. Increase the volume on your phone or source device before resuming playback.

Restarting and resetting: If the connection does not work despite these steps, completely turn off the Auna Ultrasonic CD system and your source device for a few seconds, then turn them back on. This resets the Bluetooth connection. If the problem persists, "forget" the Auna device in your phone or device's Bluetooth settings, then search for and pair "KCD818BT" again.

Quick disconnection and reconnection: You can use the ⏯/PAIR (Play/Pair) button on the system to quickly disconnect Bluetooth. Pressing this button once will disconnect Bluetooth. Pressing it a second time will resume playback with the same device. This feature is useful if you need to switch to other devices or if the connection seems frozen.

Electrostatic discharge: If there is a sudden malfunction or if the system is unresponsive after connecting, it is possible that an electrostatic discharge has affected it. Simply turn off the system by pressing the power button, wait a few seconds, then turn it back on. The system should function normally after this reset.

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