33 Vantec series User's Manual
Vantec Series | Amplifier
Problem Cause Solution
No sound from the unit. The input meters on the
screen do not show any signal presence.
1 – The signal source is sending no signal.
2 – Defective cable.
3 - The amplifier has overheated.
1 – Check that the mixer or sound source is sending signal to the UNIT.
2 – Check that the cable from the sound source to the UNIT is connec-
ted correctly. Replace the cable if defective.
3 - Allow the unit to cool down for some minutes and it will function
again. Check the main output level of the mixer or channel gains
since the unit will have been functioning with excessive levels.
Full power cannot be obtained. LIMIT message never
appears on the screen.
The signal source does not have a hot enough output. If using a mixer, use the balanced output if available. Use a professional
mixer with a hotter output
Sound is distorted. LIMIT message is not shown. The mixer or signal source is distorting. Turn mixer channel gains down. Check that none of your signal sources
are distorting.
Sound is distorted and very loud and LIMIT is displa-
yed in the screen.
The system is overloaded and has reached maximum power. Turn down the mixer's output.
Hum or buzz when a mixer is connected to the unit. 1 – The console probably has un-balanced outputs. You may be
using an incorrect un-balanced 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 – Read the appendix of this manual to make a correct un-balanced 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.
Hum or buzz when using lighting controls in the
same building.
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 equip-
ment 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.
The screen does not light up when the mains connec-
tor is connected and the unit is switched to 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.
1 – Check your connections.
2 – Check the cables, connectors and AC power with a suitable mains
tester.
3 – Replace the blown fuse for another of the same type and size. 4.- If
the multimeter determines that the mains voltage is out the range,
you may need the assistance of an electrician to find an appropriate
solution.
Troubleshooting
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