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747-400 MAINTENANCE MANUAL
 b)  NAV RADIO VOR R
 (c)  
Make sure that all interfacing systems are servicable.

 (d)  
Make sure the inertial reference system (IRS) is aligned in the NAV mode (Ref 34-21-00/201).

 (e)  
Tune the VOR/MKR receivers to a valid VOR frequency.

 (f)  
Set the mode select switch on the EFIS control panel to the VOR position.

 (2)  Turn off procedure
 (a)  
Make sure these circuit breakers are open:

 1)  P7 Overhead Circuit Breaker Panel
 a) NAV RADIO MKR VOR L
 b) NAV RADIO VOR R

 (b)  
Remove electrical power (Ref 24-22-00/201).

 NOTE: Be sure that the IRU's are turned off before removing
____ electrical power (Ref 34-21-00/501).
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747-400
MAINTENANCE MANUAL

MINS  BARO
FPV MTRS RST STD VOR MAP 80
RADIO BARO  IN HPA
16040APP PLN
VOR L 20 320 VOR R
OFF CTR 10 TFC 640 OFF
ADF L 5 ADF R

WXR STA WPT ARPT DATA POS TERR

CAPTAIN'S AND FIRST OFFICER'S
EFIS CONTROL PANEL
(EXAMPLE)

CONTROL DISPLAY UNIT

2L 1L  1 3 5  / // / / /0 0 081 0 0 A C R S LV O R S E A0. N A V 1051  R A D I O 15  20  24 
VOR TEST PREPARATION 
VOR Navigation System Seft-Test Display Figure 6 (Sheet 1) 

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MAINTENANCE MANUAL

FAILURE WARNING INDICATION NCD INDICATION VALID DATA VOR INDICATION
NDVORL VOR L VOR L VOR L VOR R  ND VOR L FROM CRS 000108.00 NDVOR LVOR L VOR R 108.00 108.00 
DISPLAY VOR AND NARROW BEARING POINTER FLAGREMOVE COURSE DEVIATION BAR AND SCALE.DISPLAY NAV DATA SOURCE  REMOVE COURSE DEVIATION BAR  NARROW BEARING POINTER INDICATE 180 |2 DEGREESREMOVE VOR AND NARROW BEARING POINTER FLAGDISPLAY NAV DATA SOURCE AND FREQUENCY 
REMOVE TO/FROM ANNUNCIATOR  REMOVE TO/FROM ANNUNCIATION  TO/FROM ANNUNCIATION WITH COURSE DEVIATIONBAR CENTEREDDISPLAY COURSE DEVIATION BAR, SCALE AND 

VOR TEST PROCEDURE
VOR Navigation System Self-Test DisplaysFigure 6 (Sheet 2)
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747-400 FAULT ISOLATION/MAINT MANUAL
VOR NAVIGATION SYSTEM
COMPONENT  102 FIG. SHT  QTY  ACCESS/AREA  AMM REFERENCE 
ANTENNA - VOR/LOC, B67  1  1  VERTICAL STABILIZER TIP  34-51-02 
CIRCUIT BREAKER - 1  FLT COMPT, P7 
MKR VOR L, C759  1  7A09  * 
COMPUTER - (FIM 45-10-00/101) PANEL - (FIM 31-61-00/101) DIVIDER - (FIM 34-31-00/101) COMPUTER - (FIM 34-61-00/101) VOR R, C756 L CENTRAL MAINTENANCE, M7373 CAPT'S EFIS CONTROL, M7354 F/O'S EFIS CONTROL, M7364 L VOR/LOC RF PWR, B8316 R VOR/LOC RF PWR, B8317 R CENTRAL MAINTENANCE, M7374 R FLIGHT MANAGEMENT, M7433 L FLIGHT MANAGEMENT, M7442  1  7B21  * 
RECEIVER - LEFT VOR/MKR, B621  2  1  117AL, MAIN EQUIP CTR, E2-3  34-51-01 
UNIT - (FIM 31-61-00/101) UNIT - (FIM 34-61-00/101) RESISTOR - (FIM 34-31-00/101) RELAY - (FIM 34-61-00/101) RELAY - (FIM 32-09-00/101) RECEIVER - RIGHT VOR/MKR, B629 NO. 1 FMC MASTER SW, R7229 NO. 1 AIR/GND, R983 N0. 4 AIR/GND, R7365 NO. 5 AIR/GND, R7366 C EFIS/EICAS INTERFACE, M7352 R EFIS/EICAS INTERFACE, M7351 L EFIS/EICAS INTERFACE, M7353 R CONTROL DISPLAY, M7440 C CONTROL DISPLAY, M7441 L CONTROL DISPLAY, M7439 L ILS TUNING SOURCE SELECT, M4528 NO. 2 AIR/GND, R768 NO. 2 FMC MASTER SW, R7230 R ILS TUNING SOURCE SELECT, M4529  2  1  117AL, MAIN EQUIP CTR, E2-2  34-51-01 
　
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