A320飞机维护手册 AMM Communications 通讯1(147)

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 (4) The prerecorded announcement section of the audio module has four 3 digit LED displays, a READY light (if lit, reproducer is ready to play back the next announcement) and a numeric keyboard with pushbutton switches as follows: - START NEXT - START ALL - STOP - CLEAR - ENTER
 (5) The boarding music section (BGM channel) has: One LED display (a row of LEDs indicate volume control), and pushbutton switches as follows: - an ON/OFF pushbutton switch, - a SEL pushbutton switch (channel select), - a ( - ) pushbutton switch (volume decrease), - a ( + ) pushbutton switch (volume increase). 
R  **ON A/C 106-149, 301-399, 
R R R R  (3) The AUDIO page of the FAP 120RH controls the prerecorded announcements and the Boarding Music (BGM). The PRAM reproducer 10RX and the FAP 120RH have two ARINC 429 data bus lines (transmit and receive bus) controlled through the CIDS (Ref. 23-73-00). 
R R R R R  (4) The prerecorded announcement section on the touchscreen of the AUDIO page has 3 display areas, a numeric keyboard and the function keys as follows: - Up - Clear Memo 

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R R R R R R R  - Clear All - Down - Stop - Play Next - Play All - Clear - Enter. 
R R R R R R R  (5) The BGM section on the touchscreen of the AUDIO page has 2 display areas and function keys as follows: - ON/OFF - Up (+) VOL. - Down (-) VOL. - UP (+) CHAN. - Down (-) CHAN.
 **ON A/C ALL
 4. Power Supply____________
 **ON A/C 001-049, 051-099, 101-105, 151-158, 201-210,
 (Ref. Fig. 002) 115 V AC is supplied to the PRAM from the normal busbar 210XPA through the circuit breaker 2RX. 
R  **ON A/C 106-149, 159-199, 211-299, 301-399, 401-499,
 (Ref. Fig. 002A) 115 V AC is supplied to the PRAM from the sheddable busbar 220XP-A through the circuit breaker 2RX. 
R  **ON A/C 001-049, 051-099, 101-149, 151-199, 201-299, 301-399,
 5. Component Description_____________________ 

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 Power Supply - Schematic
 Figure 002

R 1EFF : 001-049, 051-099, 101-105, 151-158, 1 23-32-00Page 15 1201-210, 1Aug 01/05 1 1 1CES 1R Power Supply - Schematic R Figure 002A

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 **ON A/C 001-049, 051-099, 101-105,

 A. PRAM The pram reproducer contains total four cassette tape decks, two for the prerecorded announcement reproducing and another two for the boarding music reproducing. Additionally a Solid State Voice Storage circuit for emergency announce is installed.
 (1)
 Announcement Two identical tape decks are installed for the pre-recorded announcements, each loaded with identically prerecorded tape cassettes. The tape cassettes are pre-recorded with a special four-track arrangement in one direction only. Up to 256 announcements are stored on one tape cassette. When one tape deck is in play mode, the other winds to give continuous play. The PRAM transmits an emergency announcement automatically if a rapid cabin decompression occurs. The emergency announcement is stored in a Solid State Stored Voice (SSSV). An electrical ground signal caused by a rapid cabin decompression starts the emergency announcement. The ouput-level of the normal and emergency announcements can be adjusted at the front of the reproducer.

 (2)
 Boarding-Music Two identical tape decks (A and B) are installed for the BGM, each loaded with a tape cassette. The tape cassettes are pre-recorded with a special four-track arrangement in one direction only. Each tape cassette has four BGM programs in mono mode or two in stereo mode. In stereo mode, track 1 and 3, and track 2 and 4 are paired (track 1 and 2 are the left stereo channels and track 3 and 4 are the right stereo channels). Tape A contains the first half of the program and tape B the second half. When one tape deck is in play mode, the other winds to give continuous play.

 (3)
 Not Applicable

 **ON A/C 106-149, 211-299, 301-399,
 A. PRAM
 (1) Announcement EPROM memory chips are installed to give announce playback with direct access. The memory chips are reprogrammable. The PRAM has the function to give an emergency announcement automatically in the event of rapid cabin decompression. The emergency announcement is stored in an EPROM memory chip. A ground
R 1EFF : 001-049, 051-099, 101-149, 211-299, 1 23-32-00Page 17 1301-399, 1Aug 01/05 1 1 1CES 1 signal from a rapid cabin decompression sensor starts the emergency announcement.

 (2)
 Boarding-Music The tape deck for boarding music reproduction has four channels. This permit a maximum playtime of 120 minutes per C-60 cassette.
　
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