Passenger Entertainment System - Block Diagram
 Figure 037

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 - Landing gear down and locked, - Oil pressure low, - Cabin pressure low, - Excessive altitude, - Slats out, - Flaps out, - All doors closed. The IFE transmits the audio signals to the CIDS director. From the director the signals are transmitted via the DEU type A directly or via PISA to the loudspeakers.
 (c) Gain adjustment In case of low cabin-pressure or engine on (high oil-pressure) the volume of audio programs or video sound is automatically increased. 
R  **ON A/C 106-149, 301-399, 401-499,
 (7) Passenger Lighted Signs 
R  **ON A/C 106-149, 301-399,
 (Ref. Fig. 038) 
R  **ON A/C 106-149, 301-399, 401-499,
R R R  (a) General The passenger lighted signs system controls the No Smoking (NS), Fasten Seat Belt (FSB), Return To Seat (RTS) and Exit Signs. The control switches for the signs are located in the cockpit.
 (b) Operation of passenger lighted signs The NS and FSB/RTS signs are operated in the following control modes: - ON, - AUTO, (NS signs only) - OFF.
 1_ FSB switch in 'ON' position The FSB control switch on the cockpit overhead panel in the 'ON' position sets a director discrete to ground and the director sends a signal to the DEU type A. The DEU switches on all FSB signs and the RTS signs directly or via PISA. 

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 Passenger Lighted Signs - Block Diagram - Example
 Figure 038

R 1EFF : 106-149, 301-399, 1 23-73-00Page A14 1 1 Config-2 Aug 01/05 1 1 1CES 1 Additionally the FSB sign status is transferred to the PRAM and via the SDAC a FASTEN SEAT BELT message is indicated on the ECAM display.

 2 NS switch in 'ON' position
_ The NS control switch on the cockpit overhead panel in the 'ON' position sets a director discrete to ground and the director sends a signal to the DEU type A. The DEU switches on all NS signs directly or via PISA. Additionally the NS sign status is transferred to the PRAM and via the SDAC a NO SMOKING message is indicated on the ECAM display. The EXIT signs are switched on via the exit sign relay.

R **ON A/C 106-149, 401-499,
 3 FSB switch in 'AUTO' position
_ The FSB control switch on the cockpit overhead panel in the 'AUTO' position sets a director discrete to ground to activate the FSB and RTS signs in case of:
 -Landing gear down and locked (LGCIU).
 Additionally the FSB sign status is transferred to the PRAM
 and via the SDAC a FASTEN SEAT BELT message is initiated on
 the ECAM display.

R **ON A/C 106-149, 301-399, 401-499,
 4 NS switch in 'AUTO' position
_ The NS control switch on the cockpit overhead panel in the 'AUTO' position sets a director discrete to ground to activate the NS and Exit signs in case off:
 -Landing gear down and locked (LGCIU).
 Additionally the NS sign status is transferred to the PRAM and
 via the SDAC a NO SMOKING message is indicated on the ECAM
 display.

 5 FSB switch in 'OFF' position
_ If the FSB switch on the cockpit overhead panel is in the 'OFF' position, all FSB and RTS signs are switched off.
 6 NS switch in 'OFF' position
_ If the NS switch on the cockpit overhead panel is in the 'OFF' position, all NS and Exit signs are switched off. Only the NS signs in the no smoking area are constantly switched on.
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 **ON A/C 301-399,
 (c) NON SMOKER A/C On the FAP on the CABIN PROGRAMMING page you can activate the NON SMOKER A/C function. All NS and attendant NS signs are switched on, regardless of the position of the cockpit switches. 
R  **ON A/C 106-149, 301-399, 401-499,
 (d) Cabin decompression In case of cabin decompression all NS and FSB signs are switched on and a signal is sent to the PRAM, regardless of the position of the cockpit switches. The RTS signs are switched off.
 **ON A/C 301-399,
R R R  (e) Sign flash After activation of the NS, FSB or RTS signs, the signs flash for a predefined time with a predefined frequency and then stay on continuously. 
R  **ON A/C 106-149, 301-399, 401-499,
 (f) Attention chime Activating the NS or FSB signs causes an attention chime in the respective cabin area.
 (g) Signs dimming The signs are dimmed with the general illumination.
 (8) Passenger Call
 **ON A/C 301-399,
 (Ref. Fig. 039) 
　
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