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 34-32-01
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747-400
MAINTENANCE MANUAL

(AROUND ANTENNA BASE)  AERODYNAMIC SEALANT BMS 5-95 (6 LOCATIONS)
INSTALLATION BUILDUP A-A
Marker Beacon Antenna Installation Figure 401
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 34-32-01
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747-400 MAINTENANCE MANUAL
 VOR/MKR RECEIVER - REMOVAL/INSTALLATION
_______________________________________
 1.  General_______
 A.  This procedure has two tasks, one for the removal and one for the installation of a VOR/MKR receiver. After the installation of a VOR/MKR receiver, you must do an operational test.
 TASK 34-32-02-004-001
 2.  VOR/MKR Receiver Removal________________________
 A.  General
 (1)  There are two VOR/MKR receivers installed on the electronic equipment rack E2 in the main equipment center. The left VOR/MKR receiver (B621) is on shelf No. 3. The right VOR/MKR receiver (B629) is on shelf No. 2.
 B.  References
 (1) AMM 20-11-22/401, Rack-Mounted Electrical/Electronic Module
 C.  Access
 (1)  Location Zone 118 Electrical and Electronics Compartment, RH
 D.  Procedure
 S 864-007
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P7 Overhead Circuit Breaker Panel
 1) 7A9 NAV RADIO MKR VOR L

 S 024-008
 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)  Do this task to remove a VOR/MKR receiver from the electronics equipment rack E2: "Rack-Mounted Electrical/Electronic Module Removal" (AMM 20-11-22/401).
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 34-32-02
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747-400
MAINTENANCE MANUAL

 S 034-009
 (3)  Install dust caps on the electrical connectors.
 TASK 34-32-02-404-004
 3. VOR/MKR Receiver Installation
_____________________________
 A. General
 (1)  There are two VOR/MKR receivers installed on the electronic equipment rack E2 in the main equipment center. The left VOR/MKR receiver (B621) is on shelf No. 3. The right VOR/MKR receiver (B629) is on shelf No. 2.
 B. References
 (1)  
AMM 20-11-22/401, Rack-Mounted Electrical/Electronic Module

 (2)  
AMM 24-22-00/201, Manual Control

 (3)  
IPC 34-51-01 Fig. 1

 C. Access
 (1)  Location Zone 118 Electrical and Electronics Compartment, RH
 D. Procedure
 S 864-010
 (1)  Open these circuit breakers and attach DO-NOT-CLOSE tags:
 (a)  P7 Overhead Circuit Breaker Panel
 1) 7A9 NAV RADIO MKR VOR L

 S 434-011
 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 dust caps from the electrical connectors.

 S 424-012

 (3)  
Do this task to install a VOR/MKR receiver in the electronics equipment rack E2: "Rack-Mounted Electrical/Electronic Module Installation" (AMM 20-11-22/401).

 S 864-013

 (4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
　
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