© Copyright Lotronic 2010
© Copyright Lotronic 2010
BACK
PANEL
–
KARAOKE
‐
STAR3
AMPLIFIER
TROUBLESHOOTING
GUIDE
Problem
Possible
Reason
Examine
&
Repair
No
Power
Unit
is
not
plugged
in
correctly
Fuse
blown
Check
the
power
outlet
Contact
technical
personal
No
sound
Cables
connection
not
secure
Speakers
cables
are
not
connected
Volume
is
very
low.
Input
source
in
MUTE
mode.
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.
Noise
from
Speakers
Cables
damaged
or
contacts
not
secure
Strong
magnetic
interference
when
placed
close
to
the
amplifier
Change
cables
or
check
the
connection
jack.
Reposition
the
amplifier
further
away
from
the
speakers
No
sound
from
Microphone
Microphone
is
OFF
MIC
volume
is
very
low
Turn
on
the
Microphone.
Switch
MIC
VOL
to
a
higher
level.
Howling
Microphone
too
close
to
speakers
Move
microphone
further
away
from
speakers
or
switch
MIC
VOL
to
a
lower
level.
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
220
‐
240V
AC
‐
50/60Hz
Frequency
Response
20Hz
‐
20KHz
(±3dB)
Main
channel
output
20W+20W
Total
Harmonic
Distortion
≤
0.5%
S/N
Ratio
≥
80dB
Tone
Control
Treble
±12dB
(10KHz0
Bass
±12dB
(100Hz)
