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• U-Disk Input: Insert your U-Disk into the U-Disk input
interface. The input indicator light is red and
flashes continuously.
• Bluetooth Input: Short Press the Multi-function Knob
(Power Switch/Mode Switch/Volume
Control) to the Bluetooth mode input(the
blue input mode indicator light flashing).
Then turn on the Bluetooth on your
device,select "BL20A" for pairing, the
input mode indicator light will stay blue
after a successful connection.
Input priority: The latest input mode first.
Note: Please keep the BL20A away from other electric
devices. The BL20A can't use with a radio
simultaneously.
Step 5: Adjust the Volume control, Bass/Treble control, then
enjoy it!
Note: Make sure that all the cables are completely pushed
into the device.
Q&A/ Troubleshooting
1. Get noise when playing music?
• Bluetooth input play mode: Try to use other Bluetooth
devices. Weak or unstable Bluetooth signal will cause this
problem, try to close your device to the BL20A.
• U-Disk input play mode: Try to use other U-Disks, and make
sure the audio format is compatible with the BL20A. (BL20A
supports MP3/WMA/APE/ FLAC/WAV audio format). Make
sure that the U-Disk capacity does not exceed 32GB and can
be used normally.
• AUX input play mode: Please change the audio cable to have
a try.
• Try another RCA cable and make sure the audio cable is
connected correctly.
• Please unplug the RCA cable from the amplifier, and then
turn it on to have a try.
• Please change the audio source or other brand devices to
have a try.
• Did you set the "treble" volume to the top? please volume
down the "Treble" volume.
• Make sure that all the cables are completely pushed into the
device, incompletely connection will cause this issue.
• Please keep this device away from other electronic devices.
2. All cables are connected, but there is no audio
output?
• Please check the input indicator light on the front panel of
the BL20A and the power supply are on.
• If the input indicator light is on, please check if the volume
knob is at the minimum state, if it is, please turn up the
volume.
• Make sure that the BL20A is in the play mode you want.
Note: Bluetooth input mode (The input mode indicator light
will stay on blue.)
AUX input mode (The input mode indicator light will
stay on red.)
U-Disk input mode (The input indicator light is red and
flashes continuously.)
Input priority: The latest input mode first.
• Make sure that the U-Disk capacity does not exceed 32GB
and can work normally.
• Please check if the audio source is paused.
• Please try to change the sound source, cables and speakers.
• Restart the BL20A and your device, then try to connect again.
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