Ecler XPA7000, Руководство по обслуживанию

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QUALITY CONTROL
All mechanical parts should be visually revised, in order to detect scratches on the unit's
painting; all screws should be on their place, correctly tight and unmarked. Check out the unit's
general presentation.
VERIFICATION USING MUSIC
Verify the unit's sound quality, which should be distortion and noise free. Also check that all
potentiometers can run smoothly their whole sweep, without annoying noises and crisperings.
At their minimum position, check that output signal is completely cutted off. To ensure that all
electrical junctions are well fixed, hit the tested unit against your working table, obviously
without damaging its outer presentation. Verify also all inputs and outputs. At last, short-circuit
the output terminals while carrying amplified signal, and verify that once short-circuit is
removed, the amplifying stages still are working.