737-300 400 500 AMM 飞机维护手册 通讯 COMMUNICATIONS(89)

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 C.  The front panel of the AAU contains several screw adjustments. These are designed for in-shop test station adjustment only and should not be adjusted on the airplane.
 TASK 23-51-12-024-016
 2.  Audio Accessory Unit Removal
____________________________
 A.  References
 (1)  
AMM 20-10-07/201, Electrical/Electronic Black Box

 (2)  
AMM 20-40-12/201, Electrostatic Discharge Sensitive Devices

 B.  Access
 (1)  Location Zone
 205 Electrionics Equipment Compartment

 C.  Procedure
 S 864-002
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P6 Load Control Center - Right
 1) C239, CAPT NO. 2 INTPH POWER
 2) C240, CAPT BAT INTPH POWER
 3) C560, F/O NO. 2 INTPH POWER
 4) C561, F/O BAT INTPH POWER
 5) C83, CAPTS AND OBS
 6) C84, SERV INTPH
 7) C85, FLIGHT INTPH
 8) C86, F/O AND EQUIP RACK

 S 914-014
 CAUTION: DO NOT TOUCH THE AAU BEFORE YOU DO THE PROCEDURE FOR DEVICES
_______ THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE AAU.
 (2)  Do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-40-12/201).
 EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. AIRPLANES WITHOUT DIGITAL ú

 23-51-12
 AUDIO CONTROL SYSTEM  ú ú 02 Page 401 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
 S 024-015
 (3)  Remove the AAU from the E2-1 shelf in the Electronics Equipment compartment (AMM 20-10-07/201).
 TASK 23-51-12-424-017
 3. Audio Accessory Unit Installation
_________________________________
 A. References
 (1)  
AMM 20-10-07/201, Electrical/Electronic Black Box

 (2)  
AMM 20-40-12/201, Electrostatic Discharge Sensitive Devices

 (3)  
AMM 24-22-00/201, Manual Control

 B. Access
 (1)  Location Zone
 205 Electronics Equipment Compartment
 101 Control Cabin - Left
 102 Control Cabin - Right

 C. Procedure
 S 914-018
 CAUTION: DO NOT TOUCH THE AAU BEFORE YOU DO THE PROCEDURE FOR DEVICES
_______ THAT ARE SENSITIVE TO ELECTROSTATIC DISCHARGE. ELECTROSTATIC DISCHARGE CAN CAUSE DAMAGE TO THE AAU.
 (1)  
Do the procedure for devices that are sensitive to electrostatic discharge (AMM 20-40-12/201).

 S 424-019

 (2)  
Install the AAU on the E2-1 shelf in the Electronics Equipment Compartment (AMM 20-10-07/201).

 S 864-006

 (3)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:

 (a)  P6 Load Control Center - Right
 1) C239, CAPT NO. 2 INTPH POWER
 2) C240, CAPT BAT INTPH POWER
 3) C560, F/O NO. 2 INTPH POWER
 4) C561, F/O BAT INTPH POWER
 5) C84, SERVICE INTPH
 6) C85, FLIGHT INTPH
 7) C83, CAPTS AND OBS
 8) C86, F/O AND EQUIP RACK

 (4)  
Supply electrical power (AMM 24-22-00/201).

 S 864-009
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 23-51-12
 AUDIO CONTROL SYSTEM  ú ú 02 Page 402 ú Jul 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
 S 714-013
 (5)  Do an operational test of the installed AAU:
 (a)  
Push the FLT INT or INT microphone selector switches on all audio selector panels (ASPs). 1) Make sure the LED light comes on, on all ASPs.

 (b)  
Make voice communication between captain's, first officer's and observer's stations by use of the boom mic/headsets. 1) Make sure the communication can be made on all stations.

 (c)  
Push the PA microphone selector switch on the captain's ASP. 1) Make sure the LED light comes on.

 (d)  
Make voice announcement. 1) Make sure you hear a clear voice from the PA speakers.
　
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