©Copyright LOTRONIC 2018
BOOST-POWERSOUND28-400
6
Troubleshooting
Problem
Possible cause
Solution
No sound output
when power on
1: No input sound source
2: Volume knob in the lowest position
3: USB/SD no plug
1:Connect a Line signal
2: Adjust volume
3: Insert a USB/SD Card
Distortion of sound
1:Volume too loud
2: Audio file error
1:Turn volume lower
2:Check and change the audio file
3: Adjust Bass/Treble and “Main volume”
No sound from the
USB/SD card
1:incompatible song format
2: Illegal operation causes failures
3:USB/SD Card not inserted properly
1:songs format should be MP3/WMA
2: Power off, then power on
3:Insert USB/SD card properly
No sound from
the Microphone
1:Microphone socket not fully
plugged in
2: Microphone switch is not on
3: Microphone volume in lowest
1:Completely plug in the microphone
socket
2:Power on microphone
3:Adjust microphone volume
FM Radio problems
1:Can’t search radio channels
2:FM no sound
3:FM Channels too little
4:FM sound not clear
1: The FM ANT is not expanded
2: Switch to next Channel and try
3: Try and position the FM ANT to a
different angle
4: Twist FM ANT to other side or try “Auto
scan”
Speaker makes big noise 1:Wired Microphone too close to the
speaker
2:Wired Microphone is switched on but
not in use
3: Microphone volume too loud
4:Mobile phone too close to the speaker
5:Too close to the equipment which
interferes with the speaker
1:Do not let the wired microphones head
point at the speaker
2:Turn off wired microphone if not in use
3:Reduce the microphone volume
4: Keep mobile away from the speaker
during calls
5:Keep the speaker away from other sources
of interference
Blue-connect
Failure
1: Blue-connect Disconnected
2: Blue-connect Connected but no voice
3: Blue-connect effective distance too
short
1: Find the right device Name or press
"MENU" Button to restore factory settings.
2: Confirm if you are connected to the right
device Name
3: Try to keep away from barriers, such as
walls, glasses…etc
Remarks:
If the problem persists, please contact your dealer.
Electric products must not be put into household waste. Please bring them to a recycling centre. Ask your
local authorities or your dealer about the way to proceed.
The declaration of conformity is available on our website at www.lotronic.net
