Northern Airborne Technology AA85 - Manual (Page 22)

AA85 InterVOX II™ Intercom Manual SM38 Rev. 4.10
Page 2-8 Jun 9, 2004
ENG-FORM: 805-0106.DOT
Amendment #2 Apr 11, 2006
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.3.8 Mechanical Installation
The AA85 can be installed in any attitude, using the AA85-IKC Installation kit (refer to
Section 1.5 for details).
For proper installation, refer to the Mounting Diagram (AA85\001\920-0) and the
following steps:
a) Before proceeding to install the AA85-001 into the aircraft, secure the black metal
faceplate to the AA85-001 with one mounting screw (countersink holes facing out).
b) Remove the desired label from the sheet provided and using minimum pressure
align the label on the black faceplate. When the alignment is correct remove the
faceplate from the unit.
c) Lay the faceplate on a flat surface and press label firmly in place ensuring there
are no air bubbles.
d) Referencing the drill template, drill required mounting holes in the aircraft panel
and insert the AA85-001 from behind the panel.
e) Attach the black metal faceplate (with label attached) from the front with the
countersunk holes facing out. Secure with the mounting screws provided. Note:
Ensure that the AA85-001 and faceplate tightly sandwich the aircraft panel.
f) Rotate the shaft of the CREW VOX potentiometer fully ccw. Align the white
marker on the outer concentric knob (part of 40-21-ICS3) to the LIVE position on
the faceplate label. Using a 0.05” Allen key, tighten the knob onto the
potentiometer shaft.
g) Using a 0.05” Allen key, loosely attach the inner concentric knob (part of 40-21-
ICS3) onto the ICS VOL potentiometer shaft. Rotate the shaft of the ICS VOL
potentiometer fully ccw. Using an Allen key loosen the knob on the
potentiometer shaft and align the white marker on the inner concentric knob (part
of 40-21-ICS3) to the LIVE position on the faceplate label. Using an Allen key
tighten the knob onto the potentiometer shaft.
h) Repeat steps f and g for the MUSIC VOL and PAX VOX potentiometer shafts
and knob set 40-21-MUS3.
2.3.9
Post-Installation Checks
2.3.9.1 Voltage/resistance checks
Do not attach the AA85-001 until the following conditions are met.
Check the following:
a) Check P101, pin <1> for +12 to 30 Vdc relative to ground.
b) Check P101, pin <14> for continuity to ground (less than 0.5 Ω).