190-00728-04 Rev. A
Embraer Prodigy® Flight Deck 100 Pilot’s Guide
169
AUDIO PANEL AND CNS
AUDIO PANEL FAIL-SAFE OPERATION
IfthereisafailureofbothAudioPanels,afail-safecircuitconnectsthepilot’sheadsetandmicrophonedirectly
totheCOM1transceiverandthecopilot’sheadsetdirectlytotheCOM2transceiver.Audioisnotavailableon
thespeakers.Ifthereisafailure ofoneAudioPanel,thatsideonly hasaccesstotheirrespectiveon-sidefail-
safe COM.
NOTE: Audio is not available on the speakers in case of an Audio Panel and its cross-side GIA unit simultaneous
failure.
Ifthereisa failureofoneAudio Panel,theremaining AudioPaneldoesnot haveaccessto theotherside’s
COMorNAV.Forexample,ifthe pilotsideAudioPanel fails,thecopilot sideAudioPanelhas accesstoall
theradiosexceptforCOM1andNAV1.Inthiscase,thecopilotcanreceivetheaudiofromNAV2andoperate
COM2fortransmission/reception.
Inaddition,if thereisa failureofoneAudio Panel,thefollowing functionsareno longeravailableon the
failedside; NAV/ILS audio, speaker,cockpit/cockpit-passengers intercom, aural warning alerts on headset,
entertainment inputs, and digital recording radio. Also, if a stereo headset is in use, and an Audio Panel fails,
only the left channel will be heard in the headphones.
REVERSIONARY MODE
The red DISPLAY BACKUPButtonselectsthe Reversionary Mode. See the System Overview Section for
more information on Reversionary Mode.
Figure 4-59 Reversionary Mode Button