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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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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34-51-01
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BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.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
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