Cessna 172SPHUSR05 Pilot Operating Handbook page 447

C ESSNA
MODEL 1 72S
B E N D I X/KIN G K M A 2 8 A U DI O S E L E CTOR PAN E L
The Bendix/Kin g KMA 2 8 Audio Selector Panel i s a combination
audio selector panel, cabin intercom , audio amplifier and
beacon receiver. The audio amplifier powers the cockpit overhead
speaker when selected.
Receiver audio is selected using ten back-lit pushb utton
switches. Selected receivers can be identified by the illuminated
green L E D on the appropriate switch pushbutton.
m icrophone selector switch automatically supplies the audio for the
transceiver selected; The Com 1 and Com 2 switches permit the
user to monitor o r "guard" the audio from the other transceiver. All
operatin g controls are shown and described in Figure 1 .
An unam plified and unswitched stereo audio input is provided for
an entertainment audio source (Walkman or similar Portable
E lectronic Device (PED)). The E ntertainment audio input is located
on the lower h alf of the cockpit center pedestal; the 3.5 mm stereo
jack is labeled "AUX AUDIO I N " .
M ute feature that lowers the audio level of the entertainment signal
whenever radio or intercom audio is present. Refer to 14 CFR Part
9 1 .2 1 and Advisory Circular No. 9 1 . 2 1 - 1 0 " Use of Portable
E lectronic Devices Aboard Aircraft" for further information and
requirements regarding the use of portable electronic devices in
aircraft.
The cabi n intercom uses the I ntellivoxTM automatic squelch circuit
to minimize non-voice signals. The intercom audio level is set using
the front-mounted intercom volume control; audio levels for the
receivers and entertainment are controlled at the source.
Dec 30/00
SECTION 9 - S UPPLEME NTS
SUPPLEM ENT 20 - FAA APPROVED
L E M NT
S E CTION 1
G E N E RA L
The KMA 28 includes the Soft
marker
The rotary
820-3