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or red LRU status LED shows the status of the receiver test.
You can do a test of the VOR/MB receiver from the NAV control
panel or from the test switch on the VOR/MB receiver front
panel. When you do a test of the VOR function of the left VOR/
MB receiver, you do a test of the VOR function and the marker
beacon function at the same time.
VOR SYSTEM - VOR/MB RECEIVER
EFFECTIVITY
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VOR SYSTEM - VOR/MB RECEIVER
VOR SYSTEM - VOR/MB RECEIVER
EFFECTIVITY
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General
The VOR/LOC antenna is on the top of the vertical stabilizer.
The VOR antenna receives RF signals in the frequency range of
108 MHz to 117.95 MHz. The antenna receives VOR and
localizer frequencies. The VOR/LOC antenna sends VOR
signals to both VOR/MB receivers.
VOR SYSTEM - ANTENNA
EFFECTIVITY
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737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
34-51-00-008
VOR SYSTEM - ANTENNA
VOR SYSTEM - ANTENNA
EFFECTIVITY
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General
The navigation (NAV) control panel supplies frequency inputs
and test commands to the DME, ILS, and VOR navigation
radios.
Operation
The NAV control panel has an active frequency display window
and a standby frequency display window. The frequency that
shows in the active frequency display window is the frequency
that the navigation radios use for operation. The standby
frequency display window shows the next frequency you want
to use.
The transfer switch is a momentary action switch that transfers
the frequency in the standby frequency display window to the
active frequency display window. When you push the switch, the
frequency that is in the active frequency display window
transfers to the standby frequency display window.
The frequency select control is a continuous rotary knob. There
is an inner knob and an outer knob. The outer knob sets the tens
and ones digits. The inner knob sets the tenths and one
hundreths digits.
At power up, the frequency displays show the last frequency
entry before power down.
The NAV control panel continuous bite monitors control panel
operation. The NAV control panel shows FAIL in the active and
standby frequency display windows when there is a failure.
An internal monitor in the NAV control panel monitors the 28v
dc input. If the monitor does not see the 28v dc input, it will show
the message BLANK in both the active and standby frequency
display windows.
When you set a VOR frequency in the range of 108 Mhz to 117.95
Mhz, the NAV control panel sends the frequency to the VOR/MB
receivers and DME interrogators. The control panel sets the
data word to the ILS receivers to NCD.
Test
When you push the NAV control panel test switch, a test
command goes out to the VOR/MB receiver, ILS receiver, and
DME interrogator. If a VOR frequency shows in the active
frequency window, the test command goes to only the VOR/MB
receiver. IF an ILS frequency shows in the active frequency
window, the control panel sends a test command to only the ILS
receiver. If there is a DME frequency that is paired with the VOR
or ILS frequency, a test command also goes to the DME
interrogators.
When you do a test of the master dim and test system, the NAV
control panel shows 188.88. The display shows for two seconds
on then one second off until the test is complete.
VOR SYSTEM - NAVIGATION CONTROL PANEL
EFFECTIVITY
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VOR SYSTEM - NAVIGATION CONTROL PANEL
VOR SYSTEM - NAVIGATION CONTROL PANEL
EFFECTIVITY
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BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
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