Service manual

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Volume increase the volume, decreases the volume,
Balance adjusts the proportion of sound coming from each speaker.
[ϰ] directs more of the sound to the left speaker, [ϧ] directs more of the sound to the right speaker.
Bass/Treble adjusts the high (treble) and low (bass) frequency audio output
Press [2] button to select bass adjustment.
Bass
press [ϰ] or [ϧ] to adjust bass.
Treble press [ϰ] or [ϧ] to adjust treble.
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ViewSonic Corporation
Confidential – Do Not Copy VX900-2