(2)
Three prerecorded announcement tapes are provided in the tape reproducer. These tapes are designated A, B, and C. Each tape can hold 8 messages. They are designated 1 thru 8.
(3)
The prerecorded announcement control panel is located on the forward lavatory wall above the attendant seat. The attendant can select a prerecorded message on any tape by pushing the appropriate lettered pushbutton on the control panel and then selecting a prerecorded message on that tape by depressing the appropriate numbered pushbutton. The rows of pushbuttons are interlocked so that only one lettered and one numbered pushbutton may be depressed at a time.
(4)
A wait indicator light on the control panel will illuminate until the selected announcement has cued to the selected message.
(5)
After the wait indicator light has gone out, the message may be played on the PA system by depressing the ANN (announcement) pushbutton. The announcement will then play unless muted by an announcement of higher priority. Another announcement may be selected for the next playback after the first announcement is in the playback mode.
(6)
Any announcement may be cancelled at anytime in the playback cycle by depressing the CANCEL pushbutton.
(7)
The emergency announcement A-1 cannot be manually selected, but will playback on the PA system automatically whenever the passenger oxygen system is deployed. The oxygen indicator relay, R324, is the control.
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23-31-0 Page 6 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. Oct 20/89
F. On GUN/XIA ALL EXCEPT B-2501-B-2505, B-2509-B-2512, and B-2514-B-2516, the tape reproducer is operated from the controls on the face of the unit. There are controls for selection and play of both boarding music and prerecorded announcements.
(1)
Music
(a) The front face of the tape reproducer has MUSIC controls for off/on/volume and selection of music channel 1 or 2.
(2)
Prerecorded Announcement
(a)
The front face of the reproducer has the controls for selecting and playing prerecorded announcements. The selection is made with a numerical keyboard which selects the desired announcement by number and displays the selection in the window. Upon selecting an announcement, boarding music will cease and the reproducer will search for and key at the start of the selected announcement. The READY light indicates the completion of the search mode.
(b)
Pushing the START button will initiate playing of the announcement. If START is pressed before the search is complete the search will continue and announcement playback will start immediately upon completion of search. The announcement will play to completion or until STOP is pressed, after which time the reproducer will return to the boarding music mode of operation before announcement selection.
(c)
An oxygen emergency announcement has priority over and other prerecorded announcement or boarding music. This announcement is not manually selected. It will play automatically and repeat upon closing of the OXY IND relay, R324. This relay closes as part of the sequence during activation of passenger oxygen.
(3)
All keyboard, START, STOP, and channel 1 or 2 switches backlight when closed. The channel selection 1 and 2 switches are push-on/push-off. All other switches are momentary.
(4)
All the programs are on one C-60/90 Phillips four channel cassette tape. Two of the channels are for boarding music; one for selected announcements and the remaining channel for the emergency oxygen announcement.
(5)
To open the door holding the cassette tape, display 90 in the window and press music channel switch 1.
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Oct 20/89 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 23-31-0 Page 7
G. On GUN/XIA ALL EXCEPT B-2501-B-2503, B-2511, B-2512, B-2514-B-2516, and B-2524, a self-test switch on the front panel of the PA amplifier may be used to check the operating status of the system. When the switch is set to TEST, test signals cause the amplifier to produce an audible tone which may be heard over the loudspeakers. When the switch is set to CAL, the front panel LED's are switched across an internal load for checking power output. The NORM position is used for normal system operation.
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