757 AMM 飞机维护手册 COMMUNICATIONS 通讯(129)

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 NOTE: When you test the digital or solid state voice
____ recorder you will hear your voice in the headset as you speak. When you test the analog or tape based voice recorder you will hear your voice in the headset after approximately a 0.5 second delay.
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A

757 MAINTENANCE MANUAL
 S 865-038
 (20)
 Put the boom microphones and the audio selector panels back in the usual condition.

 S 865-040

 (21)
 Disconnect the headset from the voice-recorder control panel.

 S 865-041

 (22)
 Remove electrical power if it is not necessary (AMM 24-22-00).

 TASK 23-71-00-755-069
 5.  Bulk Erasure Test - Voice Recorder System_________________________________________
 A. References
 (1)  
10-11-01/201, Normal Parking

 (2)  
24-22-00/201, Electrical Power - Control

 (3)  
32-09-02/201, Air/Ground Relays

 B. Access
 (1)  Location Zones
 211/212 Flight Compartment

 C. Prepare for Test
 S 865-070
 (1)  
Supply electrical power (AMM 24-22-00).

 S 865-071

 (2)  
Make sure that the circuit breakers on the main power distribution panel P6, and the overhead circuit breaker panel P11 are closed:

 (a)  
6F4, LANDING GEAR PARKING BRAKE VLV

 (b)  
11S15, AIR/GND SYS 1

 

 D. Erasure Tests
 S 865-042
 (1)  
Supply electrical power (AMM 24-22-00).

 (2)  
Make sure that the parking brake is set (AMM 10-11-01).

 S 865-044

 (3)  
Open this circuit breaker on the main power distribution panel P6 and attach DO-NOT-CLOSE tag:

 S 865-043
 (a)  6F4, LANDING GEAR PARKING BRAKE VLV
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A

757
MAINTENANCE MANUAL

 S 865-046
 WARNING:_______ DO THE DEACTIVATION PROCEDURE FOR THE SPOILERS OR MOVE ALL
 PERSONS AND EQUIPMENT AWAY FROM THE SPOILERS.  THE SPOILERS CAN
 RETRACT QUICKLY AND CAUSE INJURY TO PERSONS OR DAMAGE TO

 EQUIPMENT.
 (4)  Do the deactivation procedure for the spoilers (AMM 27-61-00) or move all persons and equipment away from the spoilers.
 S 865-077
 WARNING:_______MAKE SURE YOU DO THE FLIGHT MODE SIMULATION CORRECTLY. IF THE PROCEDURE IS NOT DONE CORRECTLY, INJURY TO PERSONS OR DAMAGE TO EQUIPMENT CAN OCCUR.
 (5)  
Do the Flight Mode Simulation procedure for the No. 1 air/ground system (AMM 32-09-02).

 S 865-047

 (6)  
Connect a 600 ohm headphone to the HEADSET or HEADPHONE jack on the voice recorder control panel (P5).

 S 865-048

 (7)  
Push the ERASE button on the voice-recorder control panel.

 (a)  Make sure that you do not hear a modulated sound in the headphone.
 S 865-050
 (8)  Remove DO-NOT-CLOSE tag and close this circuit breaker on the P6 panel:
 (a)  6F4, LANDING GEAR PARKING BRAKE VLV
 S 865-051
 (9)  
Push the ERASE button on the control panel.

 (a)  Make sure that you do not hear a modulated sound in the headphone.

 (10)
 Put the airplane back to the ground mode (AMM 32-09-02).

 S 865-053
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