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3. MAINTENANCE,
TROUBLESHOOTING
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified personnel should work
inside the equipment.
3.1 Maintenance
Regular maintenance is essential for good
performance. Checking the items listed in
the table below monthly will help keep your
equipment in good shape for years to
come.
Checking
Item Action
Transducer
cable
Check cable for damage.
Power cable,
transducer
cable plug
Check that they are tightly
fastened. Refasten if
necessary.
Display unit
ground
Check for corrosion. Clean
if necessary.
Power supply
voltage
Check voltage. If out of
rating correct problem.
3.2 Cleaning the Display
Unit
Dust or dirt on the display unit can be
removed with a soft cloth. If desired, a
water-moistened cloth may be used. Use
special care when cleaning the LCD since it
scratches easily. Do not use chemical
cleaners to clean the display unit - they can
remove paint and markings.
3.3 Transducer
Maintenance
Marine life on the transducer face will result
in a gradual decrease in sensitivity. Check
the transducer face for cleanliness each
time the boat is dry-docked. Carefully
remove any marine life with a piece of
wood or fine-grade sandpaper.
3.4 Replacing the Fuse
The fuse in the power cable protects the
system from reverse polarity of the power
supply and equipment fault. If the fuse
blows, find the cause before replacing it.
Use only a 1A fuse (61NM-125V, 1A, or
equivalent FGBO-A, AC125V, 1A, Code No.
000-549-061). Using the wrong fuse will
damage the unit and void the warranty.
WARNING
Use the proper fuse.
Fuse rating is shown on the equipment.
Use of a wrong fuse can result in fire and
damage the equipment.
3.5 Battery Voltage Alert
A battery icon appears when the battery
voltage is too high or too low.
Battery icon and meaning
Icon Meaning
Voltage is lower than 10 VDC. If the
voltage goes below 9 V, the equipment
is automatically turned off.
Voltage is higher than 16.5 VDC. If the
voltage goes higher than 17.5 V, the
equipment is automatically turned off.