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2.9
Post Installation Checkout
After wiring is complete, verify power is ONLY on pin 20 of the J1 (bottom connector), and airframe
ground on bottom connector pin Z. Failure to do so will cause serious internal damage and void Honey-
well's warranty.
2.10
Unit Installation
To install the KMA 28B, gently slide the unit into the mounting rack until the hold-down screw is en-
gaged. 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.
War ni ng: Do n ot over -t i gh t en t h e l ock down scr ew wh i l e i n st a l l i n g t h e un i t i n t r a y.
2.10.1 Required Test Equipment
In order to return an aircraft to service after installation of the PMA7000, 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.
2.10.2 Operational Checkout
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 the right 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 micro-
phone PTT installation.
8. Verify proper transmit and receive operation from the copilot position, noting that the copilot PTT
switch allows proper transmission on the selected transceiver. Verify that the Com 1 XMT button
blinks when transmitting.
9. Verify that pushing the C
heard. Verify operation on Com 1 from the pilot position.
10. Repeat for Com 2 and standard Com 3, (if installed).
11. Press and hold the Com 1 XMT button. While holding the Com 1 button, press the Com 2 XMT but-
ton. 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. If the audio panel is installed with J2, pin J grounded, it is configured for duplex operation on Com 3.
Verify that the pilot headset is connected to the cellular telephone system (if installed). Verify that by
using the pilot side PTT, the pilot can transmit on the other selected radio (Com 1 or Com 2). Verify
that the Com 3 XMT LED blinks at about twice the rate of com 1, to indicate a duplex mode. The co-
D201106000060
Bendix/King
KMA 28B Audio Selector Panel and Intercom System
Installation and Operator's Manual
Internal damage will result.
2 button causes the button to illuminate, and the Com 2 receiver to be
OM
Page 2-11
June 2011
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