Denon D-M39S Getting Started
![Denon D-M39S manual cover](/images/12e1f0862b1f2952738672ec/thumbs/thumb175x175.webp)
The Denon D-M39S does not have built-in Bluetooth capability. To connect Bluetooth devices, use an external Bluetooth receiver connected to the auxiliary input on the unit.
Check the power cable connections and ensure the unit is plugged into a working outlet. If the problem persists, try a different power outlet and check for any blown fuses in the unit.
Ensure speakers are properly connected and placed correctly. Use high-quality audio cables and adjust the tone controls to your preference. Consider upgrading your speakers for better performance.
Check the speaker connections and ensure they are securely attached. Make sure the volume is turned up and the correct input source is selected. Additionally, verify that the mute function is not activated.
To reset the Denon D-M39S, press and hold the 'Stop' and 'Power' buttons simultaneously until the display shows the reset confirmation. Release the buttons and the unit will reset to factory settings.
Yes, the Denon D-M39S can play MP3 and WMA files from a USB device connected to its front USB port. Ensure the files are in a compatible format and the USB device is properly formatted.
Regularly dust the exterior of the unit and keep it in a well-ventilated area. Periodically check connections and clean them if needed. Avoid placing the unit in direct sunlight or areas with high humidity.
Press the 'Sleep' button on the remote control, then use the arrow keys to set the desired sleep time. The unit will automatically turn off after the set duration.
This could be due to overheating. Ensure the unit is well-ventilated and not placed in a confined space. Check for any obstructions in the ventilation slots and remove them.
Use the auxiliary input on the back of the unit for connecting external devices like a TV or a smartphone. Ensure proper cable connections and select the correct input source on the unit.