Troubleshooting - dB Technologies KL Série Manuel D'utilisation

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5. TROUBLESHOOTING

The loudspeaker will not turn on:
1. Check that power supply is present upstream of the installation.
2. Ensure that the power supply cable with VDE connector is properly plugged in.
The speaker turns on but produces no sound:
1. Check that the input connections of the audio signal (CH1 and/or CH2) are carried out correctly.
2. Check the cables for damage.
3. Ensure that the mixer or audio source is on and an output signal is present.
4. Check that the input levels (CH1 and/or CH2) are appropriate.
Speaker sound is distorted or not sufficient:
1. Adjust the first source volume, then set the input (CH1 and/or CH2) gain to an adequate level. Check the
cables for damage and replace them as required (a damaged cable may lead to signal loss or alteration).
2. Check that the input selection settings (CH1 --> Mic/Line, CH2 --> Line/Instr) are correct with respect to
the source
3. Check that the "DSP preset" settings are suitable for the use selected.
A background hum can be heard:
1. Disconnect all connected devices and turn power supply off.
2. Check that the Ground Lift switch is correctly set.
3. Check the connection cables for damage.
4. Connect cables again and turn speaker on.
KL SERIES Code 420120347 REV. 1.0
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