Ecler HAK320, Руководство по обслуживанию

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VERIFICATION USING MUSIC
Verify all signal in- and outputs with music. Verify that all signal controls are
functioning correctly, and that a good sound quality is obtained, noise- and distortion-
free. To ensure that all electrical junctions are well fixed, hit the tested unit against
your working table, obviously without damaging its outer presentation; no annoying
background noise should be added to the output signal due to this.
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.