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Manual del Usuario / vantec series / User’s Manual
Troubleshooting
No sound from the unit. The input
meters in the screen do not show any
signal presence.
Full power cannot be obtained.
LIMIT message never appears in the
screen.
Sound is distorted. INPUT CLIP
message is shown.
Sound is distorted. LIMIT message is
displayed.
Hum or buzz when a mixer is connected
to the unit.
Hum or buzz when using lighting
controls in the same building.
The screen does not light up when the
mains connector is connected and the
power switch ON.
1 - Bad or loose AC connection to the
unit or the mains outlet.
2 - Faulty AC cable.
3 - Blown Fuse.
4 - The mains voltage is out of range.
5 - Damaged amplifier.
1 - Check your connections.
2 - Check the cables, connectors and
AC power with a suitable mains tester.
3 - Replace the blown fuse with another
of the same type and size.
4 - If the multimeter determines that the
mains voltage is out of the range you
may need the assistance of an
electrician to find an appropriate
solution.
5 - Contact a qualified tech service
center.
1 - T h e c o n s o l e p r o b a b l y h a s
unbalanced outputs. You may be using
an incorrect unbalanced to balanced
cable.
2 - The mixer and the powered speaker
are not plugged into the same mains
outlet.
3 - The audio signal cable is too long or
too close to an AC cable.
1-The audio signal cable is too long or
too close to the lighting cable.
2 - On a sound system with three phase
AC, the lighting equipment and the unit
are connected to the same phase.
1- Move the audio signal cable away
from lighting cables.Try to find out at
what point the noise is leaking into the
system.
2 - Connect the sound system to a
different phase than the lights. You may
need the help of an electrician.
1-Read the appendix of this manual to
make a correct unbalanced to balanced
cable.
2 - Connect the mixer and the unit to the
same mains outlet.
3 - Use a cable that is as short as
possible and/or move the audio signal
cable away from mains cables.
The system is overloaded and has
reached maximum power.
1 - Turn down the mixer´s output.
2 - Turn down the master output volume
in the unit.
1-The mixer or signal source is
distorting.
2 - The output level from the mixer is too
high.
3 - Input gain controls are set too high.
1-Turn down the mixer´s output and
check no channels are distroting.
2 -Turn down the mixer´s output.
3 - Turn down input gain controls.
1 - The signal source does not have
enough ouput level.
2 - Input gain controls are at very low
volume.
3 - Master Volume is very low.
1 - Use balanced outputs of a mixer.
Rise master ouput volume of the
source.
2 - Set up input gain controls at higher
positions.
3 - Increase Volume by turning up the
Master Volume control.
1 - The signal source is sending no
signal.
2 - Input gain controls are at minimum
position.
3 - Defective cable.
4 - If Wireless Audio is connected input 1
which controls audio is at mimimum
position or Volume of the source is
muted.
1 - Check that the source is not muted
and is sending signal to the unit.
2 - Check input gain controls. Put them
at 0dB.
3 - Check that the cable from the source
to the unit is connected correctly.
Replace the cable if defective.
4 - Adjust Volume of input gain control
number one.
