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Connection to the mains supply
Theapparatushasitsownbuilt-inpowersupply. Before switching on the unit, make certain that the mains voltage matches
that shown on the rear (a tolerance of up to ±10% is acceptable).
Before connecting or disconnecting the power cord, make certain the ON/OFF switch is in the OFF position OFF.
Switching on and off
CAUTION: before switching on or off, make certain the sound system’s amplifiers are off or turned down: this will avoid
signal peaks, which are annoying and sometimes dangerous (particularly for speaker enclosures).
Connecting and preventing or identifying interference
First of all, check that the apparatus 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 parts of your sound system, watch out for the so-called “ground loops”, which could cause hum
and jeopardize the products’s excellent Sound-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 (“star” system). In this case, the central point can be the mixer.
To avoid or solve hum and buzzing troubles, try different combinations of lifting grounds on units that are supplied with
ground lift switches or make sure all chassis are connected to earth ground, either through the A.C. power cord ground or by the
front panel rack mount screws.
CAUTION: before changing your grounds around, always turn your amplifiers down.
Protection and maintenance
Don’tforceknobs,switchesorconnectors:thesearedesignedandmanufacturedto respond to light pressure and could be
damaged if used with excessive force.
Take care of your connector cables, a very frequent cause of small/big problems. Always grip them by the connector, avoid
pullingthem forcefully and wind them without forming knotsor sharp bends: they’ll last longer this way, and be more reliable,which
is a definite advantage.
Avoid exposing the product to strong direct sunlight, high temperatures or intense vibrations, in very dusty or particularly
dampsurroundingsor,evenworse,inthe rain: this will help to avoid the risk of faulty operation, deteriorationorevenshockelectric
shocks and fires.
Theproduct isbuiltin shock-resistantmaterial.Nevertheless, protect itduring transport withaflight-case toavoidthe risk of
any casual accidents.
When you’ve finished using the apparatus, it’s always advisable to protect it from dust, but any dust that does form should
be removed using a cloth or a soft brush. Never use alcohol, acetone or any solvents.
The apparatus does not require any other maintenance.
In the event of breakdown
All user-adjustable parts are external and easily accessed (except for the shorting connector CN4 -see “Low-Summing”
configuration). In the event of a breakdown, do not open the apparatus, but contact the nearest Generalmusic/Lem Service
Centre.
Keeping the documentation
Keep this user’s manual for future consultation. Also remember that the mixer will get a better price on the secondhand
market if (as well as being in good condition) it has its original documentation and packaging.
Warnings and Installation
Warnings and Installation
