Indicators; Cleaning - Ecler XLA500 Notice D'emploi

4.3. Indicators

The XLA amplifiers provide a simple and effective system of indicators:
•
"PROTECT" indicators (2): They indicate the absence of a power signal in the loudspeaker output of the
amplifier. They may be activated for various reasons:
1. In the startup period, from when the power-on button is pressed until the startup time necessary
to stabilize the internal voltages of the amplifier has been completed (approximately 10 seconds).
2. Due to the presence of a short-circuit in the output terminals of the amplifier (crossed cable,
damaged loudspeaker, etc.).
3. If the amplifier is supplying a continuous signal or a very low-frequency signal, which could
damage the loudspeakers.
CAUTION: If these indicators remain permanently switched on, even when all signal input and
output cables have been disconnected from the amplifier, this could be a sign of a malfunction
which should be analyzed by the official Ecler technical support service.
•
"CLIP" indicators (3): They light up when the amplified signal present in the amplifier output is just below
the level of clipping or saturation. This system always provides a true indication, regardless of the
variations in the mains voltage. When operating at high power levels, it is normal for the CLIP indicators
to light up briefly at the moment of low frequencies, because it is the low frequencies which make the
greatest energy contribution in the audible spectrum. You must try to ensure that these indicators do not
remain lit up permanently in the normal operating conditions of the amplifier.
•
"SIGNAL" indicators (4): They indicate the presence of a signal in the amplifier inputs. These indicators
light up when the signal present in the input exceeds the threshold of –40 dB.

5. CLEANING

The front panel should not be cleaned with dissolvent or abrasive substances because silk-printing
could be damaged. To clean it, use a soft cloth slightly wet with water and neutral liquid soap; dry it with a clean
cloth. Be careful that water never gets into the amplifier through the holes of the front panel.
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