Northern Airborne Technology AA20-431 - Manual (Page 27)

SM22 Rev. 4.10 AA20-431 Cabin PA System Manual
Section 3.0 Operation
3.1 Introduction
Information in this section consists of the functional and operational procedures for the
AA20-431 Cabin PA System.
3.2 General
The AA20-431 Cabin PA provides central adjustment for all the PA and music audio to
the passengers. Automatic chime before announcements and soft music muting are
standard features.
3.3 Switches and Indicators
Speaker
Switch
Power
Switch
Power
LED
3.3.1 Power Switch
To activate system, set the power switch to the ON position. The adjacent green LED
should illuminate.
3.3.2 Speaker Switch
With the SPKR switch in the MUSIC position, music audio will be heard over the
speaker. To turn off music audio, place switch into PA position. PA audio will be the
only audio delivered to the speaker. Music will be heard in the headset with the switch
in either position.
3.3.2.1 Music
Operation
To listen to music or pre-recorded messages over the PA system, select the SPKR
switch to the MUSIC position and activate the ‘music’ source. Music volume can only
be adjusted at the music source. Music will automatically mute as described in section
3.4.
Apr 21, 2004 Page 3-1
ENG-FORM: 806-0106.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.