LEM SWING12, Руководство пользователя, Страница: 21 / 40

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Contents
Contents / Instructions and installation
Instructions and installation
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Connecting the mixer to the mains supply.
Before connecting the amplifier to the mains socket, always make certain that:
- the electric system and mains socket have an adequate grounding, compatible with the safety norms (if you’re uncertain,
consult specialized personnel);
- the mains voltage corresponds to that shown on the rear of the unit (an allowance of up to ±10% is accepted);
- the power cord is not damaged and has no bare wires;
- the on/off switch is in the OFF position.
Make sure the mixer is also off before disconnecting the power cord from the mains socket.
It is best to lower (or better still close) the output levels and switch off any amplifiers connected to the line output of the
mixer before switching the mixer on or off: this avoids annoying and sometimes dangerous (particularly for the speaker cabinets)
signal peaks.
When the mixer is switched on, it’s normal for the LEDs to light up for a few moments.
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Connection and prevention or identification of possible disturbances.
First of all, check that the mixer is installed in a place free from industrial or RF (radio frequency) interference. Avoid installing your
equipment very near radio or TV sets, mobile phones, etc., as these can cause noisy interference.
When connecting the other components of your sound system, watch out for the so-called “ground loops”, which could cause hum
and jeopardize the mixer’s excellent Signal-to-Noise and low distortion characteristics.
The best way (even if not always feasible) to avoid ground loops is to connect the electric ground of all the equipment to a single
central point (the so-called “star” system). In this case, the central point in sound systems is the mixer.
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Protection and maintenance.
Do not force knobs, switches or faders: they have been designed to respond to a light touch and could be damaged if treated
with excessive force.
Take care of the connector cables. Always hold them by the connectors, avoiding pulling the wire and avoid knots and twists
when coiling them: this gives the advantage of increasing their life and reliability.
Avoid exposing the mixer to direct sun, strong heat, intense vibrations, very dusty or damp surroundings, or even worse, rain:
this will avoid eventual malfunction, deterioration or even electric shocks and fires.
Any dust on the mixer should be removed using a soft dry cloth or a brush; never use alcohol, acetone or solvents.
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In the event of breakdown
All user-adjustable parts are external and easily accessible.
Never open the amplifier: you could run the risk of serious electric shocks.
In the event of breakdown, contact the nearest GENERALMUSIC/LEM Assistance Centre
Instructions and installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
MONO input channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
STEREO input channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
MASTER section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Rear panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Connector cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Connection examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18