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BACK PANEL – KARAOKE‐STAR3 AMPLIFIER
TROUBLESHOOTING GUIDE
Problem
Possible Reason
No Power
Unit is not plugged in correctly
Fuse blown
No sound
Cables connection not secure
Speakers cables are not connected
Volume is very low.
Input source in MUTE mode.
Noise from
Cables damaged or contacts not secure
Speakers
Strong magnetic interference when placed
close to the amplifier
No sound
Microphone is OFF
from
MIC volume is very low
Microphone
© Copyright Lotronic 2010
Examine & Repair
Check the power outlet
Contact technical personal
Check all connection
cables.
Check the connection
between amplifier &
speakers.
Turn the VOLUME button
clockwise to a higher level.
Release the input source
MUTE mode.
Change cables or check the
connection jack.
Reposition the amplifier
further away from the
speakers
Turn on the Microphone.
Switch MIC VOL to a higher
level.
Howling
Microphone too close to speakers
Warning:
Always switch the amplifier off at the plug when connecting other
devices like DVD or CD Players.
WIRING THE SPEAKERS
IMPORTANT: please turn off your amplifier before connecting or disconnecting
speakers
Ensure that you connect the positive speaker terminal (red) to the positive (red)
amplifier speaker output. Take care to ensure that the polarity is preserved ie do
not connect the negative speaker terminal to the positive amplifier speaker output.
Repeat for the negative speaker terminal (black) and the negative (black) amplifier
speaker output.
TEST
Once connected, turn on system start at a low volume and increase gradually to a
comfortable volume level. The system should sound balanced with good sound
reproduction. If the set sounds distorted check to make sure that the speakers have
been correctly wired with your amplifier.
MAINTENANCE
Use a damp cloth to clean and avoid any chemical materials and polishes on the cabinet
and grill.
MAIN SPECIFICATIONS – KARAOKE‐STAR3 AMPLIFIER
Power Supply
Frequency Response
Main channel output
Total Harmonic Distortion
S/N Ratio
Tone Control
Move microphone further
away from speakers or
switch MIC VOL to a lower
level.
220‐240V AC ‐50/60Hz
20Hz‐20KHz (±3dB)
20W+20W
≤0.5%
≥80dB
Treble ±12dB (10KHz0
Bass ±12dB (100Hz)
© Copyright Lotronic 2010
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