Controls And Functions - Black Box AC470A Manual

INTERNAL AUDIO SYSTEM

3. Controls and Functions

This section describes the physical features, controls, and their functions for
the Internal Audio System. See Figure 3.1 for the front-panel location of items
1 through 9. Figure 3.2 shows a back-panel view of the unit, and the location
of items 10 through 13.
AMPLIFIER
2
3
4
Figure 3.1. Front-Panel View Showing Controls and Connectors.
1) Left and Right Audio Speakers — Provide stereo sound at your PC.
2) Stereo Headphone Output — Allows you to listen to stereo output from
your own headphones or earphones.
3) Left LED — This LED is frequency-modulated and flashes during audio
output.
4) Amplified/Direct-Driven Selection Switch (A) — This switch allows you
to amplify the audio input through the Internal Audio System's built-in
amplifier, or be directly driven by an external amplifier.
5) Left Volume Control — Controls the audio output level to the left
speaker.
6) Right Volume Control — Controls the audio output level to the right
speaker.
6
Internal Audio
DIRECT MIN MAX
5
1
System
MIN MAX
6
CD
SOUND BOARD PC SPEAKER
8
7
INPUT
9