757 AMM 飞机维护手册 COMMUNICATIONS 通讯(46)

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A
757 MAINTENANCE MANUAL
 (b)  Set the MUSIC control to the usual sound level.
 S 865-193
 (2)  Do a check of the track selector function at the front panel of the tape reproducer in the main equipment center:
 (a)
Set the BGM TRACK SELECT switch to the 1 position.

 1)  Make sure you hear the boarding music clearly on the PSU and lavatory speakers.

 (b)
Set the BGM TRACK SELECT switch to the 2 position.

 1)  Make sure you hear a different track of boarding music clearly on the PSU and lavatory speakers.

 (c)
Set the BGM TRACK SELECT switch to the 3 position.

 1)  Make sure you hear a different track of boarding music clearly on the PSU and lavatory speakers.

 (d)
Set the BGM TRACK SELECT switch to the 4 position.

 1)  Make sure you hear a different track of boarding music clearly on the PSU and lavatory speakers.

 (e)  
Set the BGM TRACK SELECT switch to the A position. 1) Make sure the boarding music stays on.

 L.  PA Override Test
 S 865-124
 (1)  
Lift the forward attendant handset off the hook.

 S 865-138

 (2)  
Push the PA switch.

 S 715-126

 (3)  
Push the PTT switch.

 (a)  Make sure the boarding music stops.
 S 755-127
 (4)  Speak into the handset.
 (a)  
Make sure you hear clear voice in the passenger cabin.

 (b)  
Make sure no sound comes from the speaker adjacent to the handset.

 M.  Microphones Test
 S 755-135
 (1)  Use the boom microphone to make a PA announcement from the pilot's audio selector panel:
 (a)  
Set the toggle switch to BOOM.

 (b)  
Push the MIC SELECTOR switch labeled PA on (switch-light on).

 (c)  
Set the PA volume control to listen.

 (d)  
Make a PA announcement with the boom microphone. 1) Make sure the sidetone is clear. 2) Make sure clear voice comes from the PA speakers. 3) Make sure an attendant handset cannot make a PA

 announcement while the pilot does.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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757
MAINTENANCE MANUAL

 S 865-125
 (2)  Open this circuit breaker on the P11 panel.
 (a)  11C23, INTERPHONE CABIN SERVICE
 S 715-136
 (3)
Make sure the forward attendant handset can make a PA announcement.

 S 865-126

 (4)  
Close this circuit breaker on the P11 panel:

 (a)  11C23, INTERPHONE CABIN SERVICE
 S 715-201
 (5)  Use the pilot's hand microphone to make a PA announcement:
 (a)  
Push the MIC SELECTOR switch labeled PA on (switch-light on).

 (b)  
Use the hand microphone to make a PA announcement. 1) Make sure clear voice comes from the PA speakers. 2) Make a PA announcement with the hand microphone and make

 sure PA announcement cannot be made from an attendant handset at the same time.
 N. Chimes Test
 S 865-171
 (1)  Set the NO SMOKING switch from the OFF to ON position, at the overhead panel, P5.
 (a)  Make sure a low chime comes from the PA speakers.
 S 865-129
 (2)  Set the NO SMOKING switch from the ON to OFF position.
 (a)  Make sure a low chime comes from the PA speakers.
 S 865-130
 (3)  Set the FASTEN SEAT BELT switch from the OFF to ON position.
 (a)  Make sure a low chime comes from the PA speakers.
 S 865-131
 (4)  Set the FASTEN SEAT BELT switch from the ON to OFF position.
 (a)  Make sure a low chime comes from the PA speakers.
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú

 23-31-00
 ALL  ú ú 08 Page 513 ú Jun 20/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
　
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