F. Boarding Music Four channel nummbers can be used to provide the boarding music. The flight attendants control the boarding music on the Forward Attendant Panel (FAP).
G. Passenger Address Audio
R (Ref. Fig. 005A) Three Passenger Address (PA) audio-inputs control all the MPES channels in each applicable aircraft zone. The CIDS controls the MPES mode and permits the use of the PA in each zone of the aircraft. The aircraft seat layout will have an effect on this system.
H. Cabin Intercommunication Data System (CIDS) Interface (Ref. Fig. 002,005) The ARINC 429 input data bus receives data from the CIDS directors. The ARINC 429 output data bus also sends data to the CIDS directors. In the Fig. 002 the CIDS has different functional interfaces. These are :
-Power ON/OFF,
-Built-In Test Equipment (BITE) information initialization and data transfer,
-PA announcement control and seat layout data transfer to the MPES.
J. ARINC 429 Output Data Port The MPES output data has a BITE fault data. The CIDS directors send this data to the Center Fault Display System (CFDS) and to the Programming and Test Panel (PTP) through the CIDS.
K. ARINC 429 Input Data Port (Ref. Fig. 006A) This port receives the CIDS data for the electrical location of seats (PA override and movie/video audio). All the necessary data is stored in the Cabin Assignment Module (CAM). The CAM is included in the PTP.
L. MPES Data Lines (Ref. Fig. 007A) The MM controls two columns of seats on the aircraft. There are two data busses in each column. When one is used for the multiplexed digital audio, the other is used for service data.
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Passenger Entertainment System (PES)
R Figure 004B
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R Seat Layout
R Figure 005
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R Seat Layout Figure 005A
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Seat Layout
R Figure 005B
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Programming and Test Panel (PTP)
Figure 006
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Programming and Test Panel (PTP)
Figure 006A
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Main Multiplexer (MM) Block Diagram
Figure 007
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Main Multiplexer Unit Interface
Figure 007A
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R (Ref. Fig. 003B, 004B)
A. BITE System The BITE system is assembled into the IFE system. The Cabin Intercommunication Data System (CIDS) (Refer to 23-73-00) commands the IFE system to go into the BITE mode. All input audio channels at the Main Multiplexer (MM) 8MK are electronically isolated from an active processing. A 400 Hz test tone is put on each of the channels. At the Seat Electronic Box (SEB) 100MK / Passenger Control Units (PCU) 200MK, 201MK and 202MK all channels are examined for correct operation. Any failure data is transmitted back to the MM, the CIDS and the Central Fault Display System (CFDS) (Refer to 31-30-00).
B. PES Power Test When the PES power is on, the BITE automatically starts. An ARINC 429 high-speed bus transfers data between the CIDS and the IFE.
C. Audio Audio signals from the audio reproducer 10MK, and video audio, supply a minimum of sixteen audio channels to the MM. Circuits in the MM process this analog input and prepare it for the conversion to digital data. These are then sent to the SEB through the Wall Disconnect Boxes (WDB) 50MK.
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