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Cleaning Instructions
•
Periodically clean the LCD front window with a soft lint-free cloth (such as
those supplied by opticians to clean spectacles)
•
Do not used cleaning solvents on any part of the NAV-7
CAUTION: Avoid using chemical solvents to clean the system as some
solvents can damage the case material.
NOTE: The NAV-7 contains no user serviceable parts. Contact your Service Agent for
repair advice or contact the McMurdo Customer Service team.
TROUBLESHOOTING GUIDE
General Points to Check
•
Make sure the antenna is mounted vertically and is clear of obstructions
•
Make sure the vessel is operating within the coverage area of a NAVTEX
transmitter
•
When the NAVTEX station(s) selected are transmitting, icons for 490, 518 and
4209.5 kHz show whenever a NAVTEX signal is received
•
Ensure that the required NAVTEX station and message categories have not
been deselected in the NAV-7 setup menu
Antenna fault icon appears at the top of the display: active antenna
1
Turn off the NAV-7
2
Disconnect the active antenna and check that there is not a
short across the antenna’s TNC connector
3
Turn on the NAV-7, apply a 120 ohm 5 W resistor across the
TNC connector. If there is 12 V DC across the TNC then either
the antenna or coax cable is faulty
4
If there is not 12 V DC across the TNC connector then check
that
Antenna power : Enabled
Antenna power : Enabled
Antenna power : Enabled
Antenna power : Enabled
is selected in the setup
screens
5
If these instructions do not work then please contact your
service agent
Antenna fault icon appears at the top of the display: passive antenna
1
Turn off the NAV-7
2
Disconnect the passive antenna and check that there is not a
short across the antenna TNC connector
3
Check that the
Antenna power
setting is set to
Disabled
o
n the
Receiver options
setup screen
4
If these instructions do not work then please contact your
service agent
Содержание NAV-7
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