(10)
To apply microphone audio to the radio communication, interphone, or passenger address system:
(a)
Push the microphone select switch on the audio selector panel to select communication system.
(b)
If a handheld microphone is used, push the PTT switch on the microphone and talk.
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MAINTENANCE MANUAL
(c) If a boom microphone or oxygen mask microphone is used, select BOOM or OXY with the toggle switch on the audio selector panel and push the audio selector panel or control wheel PTT switch and talk.
(11) To listen to navigation and communication systems audio, complete the following:
(a)
For communications systems, adjust the volume control switch on the audio selector panel and listen to headset.
(b)
For navigation systems audio, select desired L-C-R (left-center-right) and filter (VOICE-BOTH-RANGE) positions on audio selector panel, adjust volume control switch and listen to headset.
(c)
The captain's and the first officer's cockpit speakers can be used to listen to navigation and communication system audio. A knob in the center of the cockpit speaker adjusts speaker volume as desired.
(d)
The P62 Nose Gear Interphone panel has an interphone jack for monitoring flight interphone communication.
B. Control
_______
(1)
Supply electrical power (AMM 24-22-00/201).
(2)
GUN 001-010, 101-107, 201-203; Make sure that INTERPHONE CAPT FLT AMPL (2 places), and INTERPHONE F/O OBS (2 places) circuit breakers on overhead panel P11 are closed.
(3)
GUN 051; Make sure that INTERPHONE FLT AMPL ASP 1 DUAL PWR (2 places), and INTERPHONE FLT AMPL ASP 2 DUAL PWR (2 places) circuit breakers on overhead panel P11 are closed.
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FAULT ISOLATION/MAINT MANUAL
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FLIGHT INTERPHONE SYSTEM
COMPONENT SHT 102 FIG. QTY ACCESS/AREA REFERENCE AMM
AMPLIFIER - (FIM 23-31-00/101) PASSENGER ADDRESS, M177
CIRCUIT BREAKER - 1 FLT COMPT, P11
INTERPHONE - CAPT FLT AMPL, C552,C554 2 11C25,11G29 *
INTERPHONE - F/O OBS FLT AMP, C553,C557 2 11C26,11G30 *
DIODE - 1 FLT COMPT,TB113, BEHIND P5
R58 1 A10 *
R59 1 A7 *
R60 1 A9 *
INTERROGATOR - (FIM 34-55-00/101) R61 LEFT DME, M123 RIGHT DME, M124 1 A8 *
JACK - 1 FLT COMPT
CAPT BOOM MIC, D543 1 P 13 *
CAPT HAND MIC, D539 1 P13 *
CAPT HEADSET, D541 1 P13 *
F/O BOOM MIC, D533 1 P 14 *
F/O HAND MIC, D529 1 P14 *
F/O HEADSET, D531 1 P14 *
OBS BOOM MIC, D525 1 P17 *
OBS HAND MIC, D521 1 P17 *
OBS HEADSET, D523 1 P17 *
SEC OBS HEADSET, D5511 1 P61 *
JACK - FLT INTPH, D435 PANEL - (FIM 34-51-00/101) RIGHT DME/VOR, M92 LEFT DME/VOR, M91 2 1 NOSE LANDING GEAR, NOSE GEAR INTPH PNL, P62 *
PANEL - CAPT AUDIO SELECTOR, M70 1 1 FLT COMPT, P8 23-51-01
PANEL - F/O AUDIO SELECTOR, M71 1 1 FLT COMPT, P8 23-51-01
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