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* VOR antenna
* Navigation control panels
* Card files
* Remote electronics unit.
Circuit breakers
The VOR circuit breakers supply 115v ac power for receiver
operation. VOR/MB receiver 1 gets power from the ac standby
bus, section 1 and VOR/MB receiver 2 gets power from the ac
transfer bus 2, section 2.
The NAV control panel circuit breakers supply 115v ac for
control panel operation. The captain control panel gets power
from the ac standby bus and the first officer control panel gets
power from the ac transfer bus 2.
The NAV control panels receive 28v dc for control panel monitor
operation and for the ILS 28v dc ILS tuned output when you tune
an ILS frequency. The captain control panel receives 28v dc
from the 28v dc standby bus, NAV sensor DC-1 circuit breaker.
The first officer control panel receives 28v dc from the 28v dc
bus 2, NAV sensor DC-2 circuit breaker.
VOR/LOC Antenna
The VOR/LOC antenna sends RF signals through the RF power
divider 1 and RF power divider 2, to the VOR/MB receivers.
PSEU
The VOR/MB receivers get air/ground inputs from the proximity
switch electronics unit (PSEU). The receiver uses the inputs to
set the flight leg count for internal memory, and also inhibit test
in the air.
REU
The remote electronics unit (REU) receives morse code station
identifier signals and station audio from the VOR/MB receivers
and supplies them to the flight interphone speakers and
headsets.
VOR SYSTEM - POWER AND ANALOG INTERFACE
EFFECTIVITY
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VOR SYSTEM - POWER AND ANALOG INTERFACE
VOR SYSTEM - POWER AND ANALOG INTERFACE
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
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General
All digital interfaces are on ARINC 429 data buses. These are
the components that have digital interface with the VOR/MB
receivers:
* Captain and first officer NAV control panel
* Flight data acquisition unit (FDAU)
* Radio magnetic indicator (RMI)
* Flight management computer (FMC)
* Flight control computer (FCC) A
* FCC B
* Display electronics unit (DEU) 1
* DEU 2.
NAV Control Panel
The captain and first officer NAV control panels send manual
tune and test command inputs to the VOR/MB receivers. The
NAV control panels send tune inputs and test commands out on
two data buses. One data bus goes to the multi mode receivers
(MMR) and one data bus goes to both the VOR receiver and the
DME interrogators.
VOR/MB Output
The VOR/MB receivers each have two output buses. One output
bus from each receiver goes to the on-side FCC. VOR/MB
receiver 1 supplies VOR data and status to FCC A. VOR/MB
receiver 2 supplies VOR data and status to FCC B. The FCCs
use the data for the autopilot VOR mode of operation.
The other output bus of each receiver sends VOR data and
status to these components:
* FDAU for data to record by the digital flight data recorder
* RMI for bearing pointer displays
* FMC for position update calculations
* DEUs for VOR displays.
VOR SYSTEM - DIGITAL INTERFACE
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-51-00-006
VOR SYSTEM - DIGITAL INTERFACE
VOR SYSTEM - DIGITAL INTERFACE
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-51-00-006
General
The VOR/marker beacon (VOR/MB) receiver contains the VOR
receiver function and the marker beacon function. The VOR/MB
receiver supplies magnetic bearing data from a VOR ground
station.
Description
The VOR/MB receiver ia a standard ARINC 3 MCU unit with
dimensions approximately 3.74"x 7.87"x 14.76". The receiver
weighs 9 pounds and uses 115v ac 400 Hz power for operation.
Test and Indication
There are two light emitting diodes (LEDs) and a test switch on
the front of the VOR/MB receiver. The LEDs show receiver test
status when you do a test of the VOR/MB receiver. The red
control fail LED shows the status of the tune inputs. The green
　
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