Cessna 172P - Page 252

is
installed,
audio
is
selected
by tho
COM
AUTO
AUDIO
SELECTOR
S\I¡ITCH
The audio
control
panel
used
with
either
one
or two
transmÍtters
incorporates
a
three-position
t
provided
to automatically
mat
communications
recelver
to th
switch.
COM
BOTH
AUDIO
SELECTOR,
S\ryITCH
The
audio oontrol panel
ueod
with
either
one
or two transmitters
incorporates
a threo-position
toggle
switch, tabeled
coM BorH,
which is
provided
to allow
both
coM receivers
to be
monitored at
the
same time.
AUTO
AUDIO
SELECTOR
S\ryITCH
9
AUDIO
CONTROL
PANELS
PILOT'S
OPERATING
HANDBOOK
SUPPLEMENT
The audio
control
panel
used with
three
transmitters incorporates
a
three-position
toggle
switch,
Iabeled AUTO,
which
is
provided
to
automat-
ically
match
the
audio
of
the
appropriate
NAV/COM
receiver
to the
selected
transmitter.
ANNUNCTATOII
LIGHTS
BR,IGHTNESS
AND
TEST
S\ryITCH
The
audio
control
panel
used
with either
one or two transmitters
incorporates
a
three-position
toggle
switch with
NITE
(up)
and
DAY
(middle)
positions
to
control the
brightness
level of the marker
beacon
indicator
tights,
and the
BC
andRN Nav
indicator
lights
(when
installed).
In the TEST
(down) position,
all annunciator
tights
(Mkr
Bon, BC and RN)
will
illuminate
full bright
to verify
Iighting
test.
NOTE
A
potentiometer
is installed
inside
the audio
control
panel
to
provide
further
minimum
light
dimming capabilities.
Refer
to the appropriate
AvÍonics
Service/Parts manual
for adjustment
procodures.
2
30 May
1980