-Total weight:
 5.5 kg.
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 Display Unit Components
 Figure 004

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 (7) DU connector description
 (Ref. Fig. 005)
 (a) The same connector is used for inputs and outputs. It is a 67-contact male connector, type ARINC 404. Through this connector, the signals below are routed:
 -power supplies
 -A629 links
 -WXR
 -discretes/pin prog/reconfiguration
 -brightness signals.
 -video signals (special coaxial terminals) with video DU
 (8) DMC connector description One single connector of the type ARINC 600 gathers all the electrical links necessary to the various DMC functions. The connector is made up of five shells. The four upper shells are dedicated to the functional links. The lower left is dedicated to the power supply links. (Ref. Fig. 006)
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 Dysplay Unit Connector Definition
 Figure 005

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 DMC Connector Arrangement
 Figure 006

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_____________________________________________________________
 1.
 General

_______ The Display Management Computer (DMC) is a part of the EIS (Electronic Instrument System). It receives data from different avionics systems in the aircraft, decodes it. It also processes it in such a way so that the connected full color Display Units (DUs) in the cockpit can use it in order to generate symbols and pictures on their CRT displays. The DMC can drive three DUs simultaneously - two EFIS DUs and any one of the two ECAM DUs. Memory modules mounted in a dog-house on the face of the unit facilitate operational software changes in the unit. (Ref. Fig. 001)

 2.
 Component location

__________________
 (Ref. Fig. 002)

 -------------------------------------------------------------------------------FIN | FUNCTIONAL DESIGNATION | PANEL|ZONE|ACCESS | ATA | | | | DOOR | REF.
 -------------------------------------------------------------------------------1WT1 DMC-1 85VU 127 824 31-63-34 1WT2 DMC-2 86VU 128 824 31-63-34 1WT3 DMC-3 85VU 127 824 31-63-34 2WT1 PFD-CAPT 3VU 211 831 31-63-22 2WT2 PFD-F/O 5VU 212 831 31-63-22 3WT1 ND-CAPT 3VU 211 831 31-63-22 3WT2 ND-F/O 5VU 212 831 31-63-22 4WT1 DU-ECAM, UPPER 4VU 211 831 31-63-22 4WT2 DU-ECAM, LOWER 4VU 211 831 31-63-22
 3. System Description
__________________
 A. DMC The DMC is contained in a 6 MCU main housing, which can hold nine slide-in type electronic boards (seven used, two spares), a slide-in type power supply module and a dog-house mounted on its face. The seven slide-in type electronic boards are as follows:
 -
DPU 1 (PFD) board

 -
DPU 2 (ND) board

 -
DPU 3 (ECAM) board

 -
I/O interface 1 board

 -
I/O interface 2 board

 -
I/O interface 3 board

 -W/R board.
 The power supply module is a self-contained slide-in type module and
 holds three boards:

 -Regulator/generator board

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 Overhall Architecture
 Figure 001

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 DMC - Component Location
 Figure 002

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1 -Controller/monitor board

 -Filter board. The dog-house, mounted on the front side of the main housing, holds three memory modules - memory module 1 (PFD), memory module 2 (ND) and memory module 3 (ECAM) ; each module is placed in such a manner inside the dog-house so that it is mounted on top of the corresponding DPU board. Each memory module, which consists of a separate housing containing a PCB (printed circuit board), can be individually removed from the dog-house by means of two clips. The housing has an identification, a name plate and a PCB which holds the memory units. The additional boards - protection boards 1 and 2 - are mounted on the mother board inside the DMC. The mother board provides inter-connections between the various boards, the power supply module and the ARINC 600 connector. The ARINC 600 connector is mounted on the rear side of the main housing of the unit.
　
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