747-400 AMM 飞机维护手册 导航 NAVIGATION 3(48)

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A 747-400 MAINTENANCE MANUAL
 (i) (j)  Set the source select switch for the EIU on the captain's source select module to the AUTO position.Set the source select switch for the EIU on the first officer's source select module to the AUTO position.
 (2)  S 865-127Turn off the test equipment and remove it.
 (3)  S 865-126Remove electrical power if it is not necessary (Ref 24-22-00/201).

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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 VOR/MKR RECEIVER - REMOVAL/INSTALLATION
_______________________________________
 1.  General_______
 A.  This subject has two tasks. The first task is the removal of the VOR/MKR receiver. The second task is the installation of the VOR/MKR receiver.
 B.  The CMC has SHOP FAULTS menu items for the right and left VOR/MKR receivers. These VOR/MKR receivers do not give the shop faults data to the CMC.
 NOTE: Do not try to get the SHOP FAULTS data from these receivers.
____
 TASK 34-51-01-004-013
 2.  VOR/MKR Receiver Removal________________________
 A.  General
 (1)  
There are two VOR/MKR receivers in the E2 electronics equipment rack in the main equipment center. The right VOR/MKR receiver (B628) is on the No. 2 shelf. The left VOR/MKR receiver (B621) is on the No. 3 shelf.

 (2)  
The removal procedures are the same for each receiver.

 B.  References
 (1)  20-11-22/401, Rack-Mounted Electrical/Electronic Module
 C.  Access
 (1)  Location Zone 118 Electrical and Electronics Compartment, RH
 D.  Procedure
 S 864-014
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P7 Overhead Circuit Breaker Panel
 1) 7A9 NAV RADIO MKR VOR L
 2) 7B21 NAV RADIO VOR R, or

 NAV RADIO MKR VOR R
 S 024-015
 CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ VOR/MKR RECEIVER. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DICHARGE FROM YOUR BODY CAN CAUSE DAMAGE TO THE VOR/MKR RECEIVER.
 (2)  Do this task to remove the applicable VOR/MKR receiver from the E2 electronics equipment rack: Rack-Mounted Electrical/Electronic Module Removal (Ref 20-11-22/401).
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
747-400 MAINTENANCE MANUAL
 S 034-016
 (3)  Install dust caps on the electrical connectors.
 TASK 34-51-01-404-017
 3.  VOR/MKR Receiver Installation_____________________________
 A. General
 (1)  
There are two VOR/MKR receivers in the E2 electronics equipment rack in the main equipment center. The right VOR/MKR receiver (B628) is on the No. 2 shelf. The left VOR/MKR receiver (B621) is on the No. 3 shelf.

 (2)  
The installation procedures are the same for each receiver.

 B. References
 (1)  
20-11-22/401, Rack-Mounted Electrical/Electronic Module

 (2)  
24-22-00/201, Manual Control

 (3)  
34-51-00/501, VOR Navigation System

 (4)  
IPC 34-51-01 Fig. 1

 C. Access
 (1)  Location Zone 118 Electrical and Electronics Compartment, RH
 D. Procedure
 S 864-018
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P7 Overhead Circuit Breaker Panel
 1) 7A9 NAV RADIO MKR VOR L
 2) 7B21 NAV RADIO VOR R, or

 NAV RADIO MKR VOR R
 S 434-019
 CAUTION: DO NOT TOUCH THE CONNECTOR PINS OR OTHER CONDUCTORS ON THE
_______ VOR/MKR RECEIVER. IF YOU TOUCH THESE CONDUCTORS, ELECTROSTATIC DISCHARGE FROM YOUR BODY CAN CAUSE DAMAGE TO THE VOR/MKR RECEIVER.
 (2)  
Remove the dust caps from electrical connectors.

 S 424-020

 (3)  
　
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