Northern Airborne Technology AA86 - Manual (Page 12)

SM48 Rev. 4.00 AA86/87 Stereo Intercom Manual
Nov 12, 2003 Page 2-7
ENG-FORM: 805-0104.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
The Left and Right channel outputs of the stereo source should not be directly
interconnected to achieve this combination - these channels should be summed through
100 ohm series resistors.
The output from each channel of a battery-operated portable stereo source, or the
speaker output of a car-type player (after the optional attenuation discussed above)
should be connected to the ‘input’ ends of each resistor. The ‘output’ ends of each
resistor should be connected together and to the selected Left or Right channel stereo
inputs of the AA86/87 Intercom. Separate Stereo inputs are provided for the crew (front)
on pins 6 and 7, and passengers (rear) on pins 2 and 3.
2.3.5.2 AA86
Models
The AA86 Intercom has only one set of stereo inputs. The stereo source must be
connected to the front music inputs at Pins 6 and 7. Music will be heard in all
headphones, both front and rear.
2.3.6 Mechanical
Installation
The AA85-001 InterVox Intercom can be installed either horizontally or vertically.
For proper installation, refer to the Mounting Diagram (AA87\920-0) and the following
steps:
1) After selection of an appropriate panel location, drill the required mounting holes in
the aircraft panel referencing the drill template provided in the installation kit.
2) Carefully insert the AA86/87 from behind the panel, sliding the control switches
through the relevant holes. Ensure that all the LED’s are visible through the panel
holes.
3) Position the metal faceplate over the control shafts (vertically or horizontally lettered
outward, as appropriate). Note: Ensure that the AA86/87 and faceplate are both
positioned tightly against the aircraft panel.
4) Secure the intercom to the aircraft panel with the three 6-32 panhead screws provided.
5) Rotate the shaft of each outer potentiometer fully counterclockwise. Align the light
grey marker of each outer concentric knob to the ‘7 o’clock’ position, matching the
flats on the bushing with the corresponding flats on the inside of the knob, and
press firmly into position.
6) Rotate the shaft of each inner potentiometer fully counterclockwise. Align the black
marker of each inner concentric knob with the outer knob marker, and press firmly
into position.