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HA
R
D RESET
:
Turn the unit to OFF with
them[key.
Press and hold the
(pos/ljkey and press
them]
key to turn the unit ON.
SOL
RESET:
Turn the unit to OFF with
themd
key. Press and hold the
]m]key
and press
the]-]
key to turn the unit ON.
In each case following the reset, the
NAV 398
display changes to
“Ent Lat”
screen of the the Auto Start-up sequence and will prompt you to re-enter the
Latitude and Longitude initial position coordinates.
4.5 Troubleshooting Chart
SYMPTOM
CHECK
No Power Input Check in-line fuse. If blown,
replace with 2 Amp fuse.
Not Receiving
SNR readings = 0
Lat/Lon reading does
not change.
Check Sensor connections.
Check Signal Status.
Check Initial settings.
Check Est. L/L entry.
Check GRI is correct.
Check Est. L/L entry. Re-enter
if error of more than 2 degrees.
Lat/Lon readings have
constant error.
WPT BRG incorrect.
DTG appears correct.
Check position corrections for
invalid entries.
Check magnetic correction is ON.
Check if ASF is ON; Is
WPT
correct?
2
4.6 SPECIFICATIONS
4.6.1 General
Memories:
Waypoint
Event Marks:
Waypoint
Entry:
Route Plans:
Ships’ Track:
500; Name WPTs w/8 characters.
Saves to next available WPT memory.
or user select, w/date stamp & Nav type
L/L,
TDs,
10 plans; up to 20 waypoints max.
300 point memory
MAINTENANCE 4-3
72


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