Operation And Usage; Turning On; Led Indicators On The Front Panel; Volume Control On The Front Panel - Ecler HSA300 Bedienungsanleitung

4. OPERATION AND USAGE

4.1. Turning on

This is done by means of the POWER ON (6) mains switch and the pilot light in the switch itself will
come on.
In a full audio installation it is essential to start up the equipment in the following sequence: sound
sources, mixers, equalizers, processors, active filters, and finally, the power amplifiers. To shut these down,
follow the reverse sequence. By following this sequence the peaks or transients produced by switching a
device on or off will not affect the next ones in the chain, preventing these from getting to the speakers,
which are the components that are likely to suffer damage in these cases.

4.2. LED indicators on the front panel

The HSA300 has the following LED indicators on the front panel:
 SIGNAL (4) presence indicator: warns of the presence of a signal at the amplifier's input. This
indicator lights up when the signal present at the input exceeds -35dB
 OVERLOAD (3) indicator: lights up when the channel reaches its power delivery capacity limit,
due to a load with an excessively low impedance
 CLIP (2) cut-off indicator: lights up when the signal delivered to the speakers is cut close to the
actual cut-off level. This CLIP system takes into account the possible fluctuations in voltage of
the power supply, always providing a true reading even though these exist. It is normal that when
operating at high output power, the CLIP indicators light up in synchronisation with the low
frequencies, which carry the most energy. Ensure that these indicators do not stay permanently
lit during the normal operation of the equipment
 THERMAL (1) heat protection indicator: indicates that the amplifier has entered a state of over-
temperature protection, its normal operation will be restored when its temperature returns to the
normal operating temperature range.

4.3. Volume control on the front panel

The front panel has rotating volume control (5) for the amplifier output level.
In the packaging of the device, you will find bag with a transparent cap that can be fitted to the
rotating control on the front panel . Its function is to protect the volume setting from accidental changes
while the installation is being used. Once inserted it is necessary to use a flat screwdriver or a similar
tool to remove it.

5. CLEANING

The front panel should not be cleaned with solvents or abrasive substances because the 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. Ensure that water never gets into the amplifier through the holes of the front panel.
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