S 714-007
 (3)  Do the "Attendant Speaker Installation Test" task (Ref para. 4).
 TASK 23-31-12-714-008
 4.  Attendant Speaker Installation Test___________________________________
 A.  General
 (1) This task does a test of the installed attendant speaker.
 B.  References
 (1)  24-22-00/201, Manual Control
 C.  Access
 (1)  Location Zone
 100 Upper Half of Fuselage

 D.  Procedure
 S 714-009
 (1)  
Supply electrical power (Ref 24-22-00/201).

 S 714-010

 (2)  
Do a Test of the Attendant Speaker Operation:

 (a) Push the call button on a passenger cabin PSU.
 1)  Make sure that you can hear one high chime from all the attendant speakers.
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 (b)  Push the call button on a PSU one more time.
 1) The PSU call light will go out.

 S 864-011
 (3)  Remove electrical power if it is not necessary (Ref 24-22-00/201).
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 LAVATORY SPEAKER - REMOVAL/INSTALLATION
_______________________________________
 1.  General_______
 A.  There are three tasks in this procedure. The first task is the removal of a lavatory speaker. The second task is the installation of a lavatory speaker. The third task is a test of the lavatory speaker.
 TASK 23-31-13-004-001
 2.  Lavatory Speaker Removal________________________
 A.  General
 (1)  
This task removes a forward or aft lavatory speaker.

 (2)  
The location of the forward lavatory speaker is on the right side of the mirror and above the fluorescent lamp.

 (3)  
In the aft lavatories, the location of the speaker is in the Passenger Service Unit (PSU) in the ceiling.

Typical Lavatory Loudspeaker Installation
Figure 401

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 B. Access
 (1)  Location Zones
 103 Cloak Compt or Forward Lavatory
 113 Left Aft Lavatory
 114 Right Aft Lavatory

 C. Procedure
 S 864-003
 (1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Load Control Center - Right
 1) PASS ADDRESS AMPL BAT

 S 024-011
 (2)  Remove the Lavatory Speaker:
 (a)  
Put a small rod or a equivalent device into the hole in each inboard corner of the PSU.

 (b)  
Push to release the latch (use care not to damage the PSU surface). 1) Lower the PSU assembly until the lanyard is tight.

 (c)  
Remove the two speaker wires from the speaker.

 (d)  
Identify the two speaker wires for a correct installation at a subsequent time.

 (e)  
Remove the four screws, the speaker cover, and the speaker.

 TASK 23-31-13-404-004
 3.  Lavatory Speaker Installation_____________________________
 A. General
 (1)  This task installs a forward or aft lavatory speaker.
 B. Access
 (1)  Location Zones
 103 Cloak Compt or Forward Lavatory
 113 Left Aft Lavatory
 114 Right Aft Lavatory
　
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