Northern Airborne Technology 806 - Manual (Page 13)

806 and 807 Audio Selector Panels
SM806 Installation and Operation Manual
Section 2 Rev: 1.00 Issue 4 Page 2-3
ENG-FORM: 805-0115.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.
2.4.5 Post Installation Checks
2.4.5.1 Voltage/Resistance Checks
Do not attach the 806/807 until the following conditions are met.
Check the following:
a) Check P1-p for +28 Vdc relative to ground.
b) Check pins P1-CC and P1-DD for 110 Vac 400 Hz.
c) Check pins P1-q, P1-T and P1-H for continuity to ground (less than 0.5
Ω).
d) Check pin P1-BB for continuity to ground (less than 0.5
Ω) when the yoke PTT KEY switch is
activated.
e) Check all shielded cable grounds for continuity to ground (less than 0.5
Ω).
f) Check all speaker and mic inputs and outputs for correct Hi/Lo orientation.
2.4.5.2 Power On Checks
Power up the aircraft’s systems and confirm normal operation of all functions of the 806/807. Refer to
Section 3 (Operation) for specific operational details.
a) Begin with only the Pilot's headset installed, no hand mic. Confirm correct radio operation,
both receive and transmit. Check yoke (or cyclic) switch action. Check radio audio inputs and
selection of same.
b) Plug in the Co-pilot's headset. Check for correct ICS and SPLIT transmit operation. Check
that the Co-pilot loses transmit capability during PLT ISO. Check yoke switch functions.
c) Plug in the hand mic, if installed, and test for correct operation in all modes.
d) Plug in any remaining headsets, and check for correct ICS operation.
e) To verify proper operation, all functions and levels shall be checked in-flight.
f) Check that preset adjustments are completed before aircraft departure.
Upon satisfactory completion of all performance checks, make all required log book entries, electrical
load, weight and balance amendments and other documentation as required by your local regulatory
agency before releasing the aircraft for service.
2.5 Adjustments and Connections
The OXY MODE INPH VOL can be adjusted by rotating the potentiometer at the rear of the unit, which
can be accessed through an aperture in the chassis. The volume is increased by rotating the
potentiometer clockwise and decreased by rotating it counter clockwise.