Troubleshooting - HK Audio LUCAS XT Handbuch

L.U.C.A.S XT Manual 2.1

8 Troubleshooting

The Power On LED and the mains switch do not
light up red after you switch the system on.
• Check if the power cord is plugged into the
Mains Input.
• Check if the mains power supply is actually
providing current.
• Check if L.U.C.A.S ® XT's fuse is defective. Replace
only with another fuse of the same type and rating
as specified.
The Power On LED and the Power switch light up
red, but no sound is coming from the cabinets.
• Check the cables that you connected to the Line In,
Mic In and Aux ports.
• Check if the signal sources (mixer, keyboard,
CD player) are on.
• Are the Gain knobs turned up?
• Check the loudspeaker cables for damage.
• Check if the Speakon ® connectors plugged into the
Satellite Left and Satellite Right sockets are engaged
all the way (rotated fully to the right). Only then
will an electrical connection be established.
The subwoofer's bass response sounds thin or weak.
• Check the setting of the Subwoofer Level knob.
Adjust the volume of the subwoofer using the
Subwoofer Level knob until you get the kind of
bottom end you want to hear.
The signal sounds distorted.
• Check the LED displays on your mixer. They should
not be constantly in the red. If necessary, back off
the volume at the mixer.
• If the LED displays on your mixer are in the green,
turn down the L.U.C.A.S ® XT's Gain knob (Line In
or Aux In).
• Observe the LEDs of the Limiter Status displays on
L.U.C.A.S ® XT's control panel. If the yellow LED lights
up continuously, the integrated protective functions
are working at full capacity. In this instance, do not
turn the volume level up any higher.
Annoying hum
• Check the cables that you are using to connect the
signal source to L.U.C.A.S ® XT. Replace damaged cables.
• If you cannot pinpoint the cause of the hum, press
the Ground Lift switch. This should remedy the
problem in most cases.