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Officer.
Acquisition and processing are achieved by the Display
Management Computers (DMCs), and data display by the
Primary Flight Displays (PFDs) and Navigation Displays
(NDs).
DISPLAY MANAGEMENT COMPUTER (DMC)
The three DMCs are identical and interchangeable.
They receive data from the aircraft systems, decode
and process it so that it can be displayed on the
EFIS displays.
The DMCs are divided into four parts:
- data acquisition,
- PFD processing channel,
- ND processing channel,
- ECAM processing channel.
They can drive simultaneously three DUs (two EFIS and
one ECAM).
The three DMCs receive aircraft system data on ARINC 429
buses, and weather radar information on ARINC 453 high
speed bus.
They also acquire some discretes (for example:
reconfiguration of the DUs). They send data to the
PFDs and NDs through a Master Serial Data Link (DSDL),
and weather radar information through four digital
buses (one clock and three colors). The DMCs are
provided with three On Board Replaceable Modules
(OBRMs) for software modifications, and Built In Test
Equipment (BITE) for maintenance operations.
ELECTRONIC FLIGHT INSTRUMENT SYSTEM (EFIS) CONTROL PANEL
The EFIS Control Panels, which are part of the Flight
Control Unit, are linked to the DMCs by ARINC 429 buses.
The Captain EFIS Control Panel supplies DMC1 and DMC3,
whereas the First Officer EFIS Control Panel supplies
DMC2 and DMC3.
DISPLAY UNIT
The Display Units (DUs) are identical and
interchangeable.
Each DU receives digital signals from its related DMC
through a Master DSDL, and through four digital buses
for the weather radar link. They also receive ,analog
and discrete signals from the EFIS switching panels.
The Master DSDL transmits the drawing parameters and
re-initialization of the DUs.
In turn, the display units send back some feedback
signals to their driving DMC.
The feedback signals are sent to the DMCs through a
FEEDBACK DSDL.
The feedback information is:
- acknowledgment signals, DU failure information,
- critical parameter feedback signals (pitch and
roll angles, altitude, heading, aircraft
position).
TMUEIST01-T01 LEVEL 3
EFFECTIVITY 31-60-00 Page 2
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_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 178
ALL
TMUEIST01-P01 LEVEL 3
EIS: EFIS DESCRIPTION/OPERATION
EFFECTIVITY 31-60-00 Page 3
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MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 179
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SELF EXAMINATION
How is radar information transmitted from the
weather radar transceiver to the DUs?
A - On ARINC 429 and ARINC 453 buses.
B - On Master DSDL and ARINC 453 buses.
C - On ARINC 453 and DIGITAL buses.
What information does the FEEDBACK DSDL transmit?
A - Critical parameter feed back signals.
B - Acknowledgment signals and DU failure
information.
C - A and B.
TMUEIST01 LEVEL 3
EFFECTIVITY 31-60-00 Page 4
Oct 31/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 180
ALL
31 - INDICATING/RECORDING SYSTEMS
31-60-00 EIS: EIS ABNORMAL OPERATION
CONTENTS:
Failure of one EFIS DU
Failure of the ENGINE/WARNING DU
Failure of both ECAM DUs
Failure of one DMC
Failure of DMC 1+3
ECAM Control Panel Failure
Failure of one SDAC
Failure of SDAC 1+2
Failure of one FWC
Failure of FWC 1+2
Self Examination
TMUEISG02 LEVEL 3
EFFECTIVITY 31-60-00 Page 1
Nov 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 181
ALL
EIS: EIS ABNORMAL OPERATION
FAILURE OF ONE EFIS DU
In case of EFIS Display Unit failure the PFD image has
priority over the ND image.
The PFD is displayed on the remaining Display Unit.
TMUEISG02-T01 LEVEL 3
EFFECTIVITY 31-60-00 Page 2
Nov 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
UF94200
EFFECTIVITY Page 182
ALL
EIS: EIS ABNORMAL OPERATION - FAILURE OF ONE EFIS DU
TMUEISG02-P01 LEVEL 3
EFFECTIVITY 31-60-00 Page 3
Nov 30/99
_A319/A320/A321 TECHNICAL TRAINING MANUAL
MECHANICS / ELECTRICS & AVIONICS COURSE 31 INDICATING/RECORDING SYSTEMS
　
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