NEC AccuSync LCD72VM User Manual page 108

8.5 Audio Control
Following functions must be controlled by OSM.
Volume Control
Mute function
Speaker Output Power at 1kHz, 500mVrms, volume max 1 + 0.5W
Volume control characteristic is similar as gamma 2.2 curve.
8.6 Audio Test
a. During Volume function operate, Volume Icon and slide bar color is changed from Normal condition.
b. Can you hear the sound increasing or decreasing, During Volume function operate.
c. Can you hear the sound by the earphone.
d. Can you hear the sound without the earphone when earphone is connected.
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