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SYSTEM D/O
CONTENTS:
Main Multiplexer
WDB
SEB
Audio Reproducer
BITE
Self Examination
TMU23EB01 LEVEL 3
EFFECTIVITY 23-32-00 Page 1
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 23 COMMUNICATIONS
UF94200
EFFECTIVITY Page 375
ALL
PASSENGER MUSIC ENTERTAINMENT SYSTEM D/O
MAIN MULTIPLEXER
The Main Multiplexer (MM) generates a radio frequency
signal which contains the audio information from the
audio reproducer (A/R), and Video System Control Unit
(VSCU), passenger address announcements from the Cabin
Intercommunication Data System (CIDS) and video
signals from the VSCU.
If passenger address announcements are to be made, the
CIDS sends a keyline signal to the audio reproducer
to stop it.
A coaxial cable transmits the radio frequency signal
to the Seat Electronic Boxes (SEB), according to the
zone selection through the Wall Disconnect Boxes (WDB).
The SEBs only transmit the selected audio signal to
the headsets through the Passenger Control Unit (PCU).
A zone selection, for Passenger Address (PA) and video
sounds, for a maximum of 2 zones, is made through
keylines.
Passenger Service System (PSS) digital data is
exchanged between the MM and the PCU.
The MM transmits this data through an ARINC 429 data
bus to the CIDS director.
WDB
Each WDB supplies a maximum of 2 SEB columns.
SEB
The Seat Electronic Box (SEB) changes the combined
radio frequency audio signal back to its original
analog form and only transmits the selected program
to the PCU.
Each SEB supplies a maximum of 3 PCUs.
The SEBs receive PCU selected data and transmit it to
the CIDS director, through the PSS and through the MM.
PCU
The Passenger Control Unit (PCU) allows the passengers
to select, to adjust the volume and to hear music and
video sounds.
Each PCU has a stereophonic transducer to drive a
stereo pneumatical headset, or a jack for an electrical
headset, or both.
TMU23EB01-T01 LEVEL 3
EFFECTIVITY 23-32-00 Page 2
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 23 COMMUNICATIONS
UF94200
EFFECTIVITY Page 376
ALL
PASSENGER MUSIC ENTERTAINMENT SYSTEM D/O - SCHEMATIC
TMU23EB01-P01 LEVEL 3
EFFECTIVITY 23-32-00 Page 3
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 23 COMMUNICATIONS
UF94200
EFFECTIVITY Page 377
ALL
PASSENGER MUSIC ENTERTAINMENT SYSTEM D/O
AUDIO REPRODUCER
The Audio Reproducers (A/R) provide different music
programs from cassettes tape or compact disks, to the
MM.
The audio reproducers also send one music program,
among 4 music programs, for boarding music (BGM), to
the CIDS director.
The BGM program selection is done through 3 keylines
from the CIDS director.
Boarding music program selection and volume are
controlled from the Forward Attendant Panel (FAP).
BITE
The BITE is used for detection and isolation of system
and component faults.
All BITE data of the PES music is assembled in the MM.
The MM transmits the BITE data through an ARINC 429
data bus to the CFDIU.
The BITE data transmission to the CFDIU is made
continuously in normal mode and on request in
interactive mode.
In interactive mode, the BITE is connected to the MCDU
through the CFDIU.
The MM starts an automatic self test after power up
and a manual self test after transmission of the
related MCDU command.
TMU23EB01-T02 LEVEL 3
EFFECTIVITY 23-32-00 Page 4
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 23 COMMUNICATIONS
UF94200
EFFECTIVITY Page 378
ALL
PASSENGER MUSIC ENTERTAINMENT SYSTEM D/O - SCHEMATIC
TMU23EB01-P02 LEVEL 3
EFFECTIVITY 23-32-00 Page 5
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 23 COMMUNICATIONS
UF94200
EFFECTIVITY Page 379
ALL
SELF EXAMINATION
How do the passengers control the headset volume?
A - With the forward attendant panel.
B - With the forward attendant panel and the
passenger control unit.
C - With the passenger control unit.
The MM provides:
A - Music, video sounds and announcements.
B - Only music channels.
C - Music channels and video sounds.
TMU23EB01 LEVEL 3
EFFECTIVITY 23-32-00 Page 6
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
　
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