Installation manual
AMX240 Audio Panel Installation Manual
200-890-0240 Rev. 02
2.10 Wiring Checkout
After wiring is complete, verify power is ONLY on pins 8 and 9 of the J2 and airframe ground on connector pins 10
and 11. Failure to do so will cause serious internal damage and void Avidyne's warranty.
2.11 Unit Installation
To install the AMX240, gently slide the unit into the mounting rack until the hold-down screw is engaged. While
applying gentle pressure to the face of the unit, tighten the 3/32" hex-head in the center of the unit until it is secure.
DO NOT OVER TIGHTEN.
CAUTION
Apply steady pressure to the bezel while screwing the unit into the tray to ensure even seating of the unit and co n-
nectors. WARNING Do not over-tighten the lock down screw while installing the unit in tray. Internal damage
will result.
2.12 Operational Checkout
2.12.1 Required Test Equipment
In order to return an aircraft to service after installation of the AMX240, the installer must have access to a Marker
Beacon signal generator:
a. IFR NAV401L, NAV402AP, IFR4000
b. TIC T-30D, T-36C
Equivalent test equipment is acceptable as long as the testing requirements can be met.
2.12.2 Audio Panel Test
NOTE
The IntelliVox® is designed for ambient noise levels of 80 dB or above. Therefore some clipping may occur in a
quiet cabin, such as without the engine running, in a hangar. This is normal.
1. Apply power to the aircraft and avionics.
2. Plug headsets into the pilot, copilot, and occupied passenger positions.
3. Verify fail-safe operation by receiving and transmitting on com 1 from the pilot position, with the audio panel
power off. The COM audio will be present in one ear cup only.
4. Switch on the unit by pressing the volume (VOL) knob.
5. Check intercom operation.
6. Push the COM 1 Xmt select button (lower row).
7. Verify that both of the COM 1 buttons light. Verify that transmit button LED (Light Emitting Diode) near the
mic selector is not blinking. If the LED is blinking, stop testing and troubleshoot the microphone PTT installa-
tion.
8. Verify proper transmit and receive operation from the copilot position, noting that the copilot PTT switch al-
lows proper transmission on the selected transceiver. Verify that the COM 1 Xmt button blinks when transmit-
ting.
9. Verify that pushing the COM 2 button causes the button to illuminate, and the COM 2 receiver to be heard.
Verify operation on COM 1 from the pilot position.
10. Repeat for COM 2
11. Press and hold the COM 1 Xmt button. While holding the COM 1 button, press the COM 2 Xmt button. This
places the unit in “split Mode;” Verify that the pilot can transmit and receive on COM 1, while the copilot
transmits and receives on COM 2.
12. Verify proper operation of all receiver sources by selecting them using the appropriate button. The button ill u-
minates to show which source is in use.
13. Push the SPKR button. Verify that all selected audio is heard in the cockpit speaker. Verify that the audio mutes
when the mic is keyed.
14. Verify that the appropriate LED in the lower button row blinks when either push to talk is keyed.
15. Verify proper Intercom system operation in the ALL, ISO and CREW modes (see Table 3-1).