Replacing the Battery
The
contains internal memories to store your waypoints, event
marks, vessel tracks, initial position, and other last used set-ups. A Lithium
battery back-up keeps this memory information intact even when the unit
is unplugged from the ship’s battery and carried home for storage.
The estimated life span of the battery is from three to five years. If the
battery
should
fail, the
memory
contents
will be lost. However, the
could still operate normally without the battery by input of all of the initial
position data and
information each time you use the unit. This
would be extremely inconvenient. To insure trouble free operation it is
suggested that the battery be replaced every three years with an exact
lithium battery.
The lithium battery is soldered onto the Processor PCB. It is recom-
mended that the battery be replaced by your authorized Raytheon dealer
or by the Raytheon Factory Service Center with an exact replacement
lithium battery type.
423 Self
Mode
The
contains a
Self
function which verifies the conditions of the
internal circuitry at power up. Self tests include; 1) checks of the ROM
RAM memories, 2) the receiver and antenna of the GPS sensor (if con-
3) the
module signal inputs, 4) whether the INT GPS
is turned ON in the
INPUT
/
OUTPUT
menu, and 5) the keypanel.
In addition, the software revision level ap-
pears on this screen. The software revision level
is usefulinformation to have
tech-
nical problem is encountered, to give to the
servicing dealer or technician.
SELF CHECK
ROM
OK
00
RECEIVER OK
To turn ON the Self Test mode, start with the
echo sounder turned OFF. Press
the
ANTENNA OK
SPEED 0 0 0
key down while pressing
key
to ON. The
Test display will appear.
TEMP 2101
lb test the
key
panel
just press each key while
watching the corresponding O’s” in the rows
labeled ‘panel” at the screen right edge. With
MAINTENANCE
115
