Learjet 36A - Page 137

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AUDIO CONTROL SYSTEM PANEL (CONf)
7. PASS SPKR-VOL ADJ-OFF Switch - This is a three position
switch and is used only when an ADF switch is set to PASS posi-
tion; otherwise the switch should be in the
OFF position.
a.
VOL ADJ position is used to monitor ADF audio over the
cockpit speaker for adjustment with the PASS SPKR VOL con-
trol.
b.
PASS SPKR position transfers ADF audio from the cockpit
speaker
to passenger speaker and mutes ADF "mixer" audio to
the cockpit speaker.
MICROPHONE FUNCTION SELECTOR
The Microphone Function Selector is a five-position rotary-type switch and
is labeled VHF 1 and 2, HF, INPH, and PASS SPKR. This switch provides
the proper microphone audio inputs for the five functions.
1. VHF 1, VHF 2, and HF Positions - When any of these positions
are selected, microphone inputs are provided for the
respective
transceiver.
2.
INPH Position - When this position is selected on one AUDIO
CONTROL Panel, interphone is provided. If the opposite Micro-
phone Function Selector is in the VHF 1 or 2, HF, or INPH posi-
tion, audio
will be provided to the opposite speaker and
headphones. If the opposite Microphone Function Selector is in the
PASS SPKR position, headphone audio only will be provided.
3.
PASS SPKR Position - When this position is selected, the pilot or
copilot, utilizing this function, may speak
to the passengers through
the passenger speaker.
If ADF is being transmitted through the pas-
senger speaker, it
will automatically be disconnected when the
Microphone Function Selector is in the
PASS SPKR position. When
the passenger speaker
is in use, aural warning is automatically
transferred to
the cockpit speaker and not transmitted to the
passengers.
2-80 FAA APPROVED 4-30-76
REISSUED 2-25-81, CHANGE
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