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13. MAINTENANCE & TROUBLESHOOTING
13-2
13.2 Replacement of Fuse,
Battery
The fuse on the power cable protects the
system from reverse polarity of the ship’s
mains and equipment fault. If the fuse blows,
find the cause before replacing it. Use only a
3 A fuse. Using the wrong fuse will damage
the unit and void the warranty.
Use the correct fuse.
Use of a wrong fuse can cause fire or
damage the equipment.
CAUTION
A battery installed on the circuit board inside
display unit preserves data when the power
is turned off. The life of the battery is about
three years. When the battery voltage is low
the battery icon (
) appears on the display.
When this happens, contact your dealer to
request replacement of the battery.
Type Code Number
Lithium
Battery
CR2450-F2 ST2L 000-144-941
Note : Use only the specified battery. Use of
an incorrect battery may cause
explosion. Dispose of the battery in
accordance with local regulations.
13.3 Simple Troubleshooting
Below are simple troubleshooting
procedures which the user can follow to
restore normal operation.
Simple troubleshooting (plotter)
If … Then …
check for blown fuse.
check that the power connector is firmly tightened.
check for corrosion on power cable connector.
check for damaged power cable.
you cannot turn on the power
check ship’s battery for proper voltage output (12/24 V).
power is on but nothing appears
press the [POWER/BRILL] key and then the cursor pad
to adjust display brilliance and tone.
there is no response when a key is pressed turn on the power again.
check for loosened antenna connector.
position is not fixed within 90 seconds.
check GPS receiver status indication.
track is not plotted plotting is stopped. (“H” appears on the plotter display.)
bearing is wrong
check that correct magnetic variation is entered on the
DISPLAY OPTIONS menu.
loran or Decca TDs do not appear
check that proper Loran or Decca chain codes are
entered on the DISPLAY UNIT.
loran TDs are wrong enter TD offset on the GPS/DGPS/TD OPTIONS menu.
ship’s speed display is not zero after ship is stopped
try to decrease GPS speed smoothing setting on the
GPS/DGPS/TD OPTIONS menu.