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3. MAINTENANCE, TROUBLE-
SHOOTING
3.1 Maintenance
Regular maintenance is essential for good
performance. Checking the items listed in the
table below monthly will help keep your equip-
ment in good shape for years to come.
3.2 Cleaning the Display
Unit
Dust or dirt on cabinets may be removed with
a soft, dry cloth. For stubborn dirt, water-
moistened cloth may be used.
To clean the display screen, use soft tissue
paper. Wipe carefully to prevent scratching.
Do not use solvents such as thinner, acetone
or benzene to clean unit. They may remove
paint and markings and deform the equip-
ment.
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 fuses (Type: FGBO-A 125V 2A, Code
No.: 000-155-849-10) in the power cable pro-
tect the system from reverse polarity of the
power supply and equipment fault. If a fuse
blows, find the cause before replacing it.
Using the wrong fuse will damage the unit and
void the warranty.
3.5 Battery Voltage Alert
A battery icon appears when the battery
voltage is too high or too low.
Checking
Item Action
Transducer
cable
Check cable for damage.
Power cable,
transducer cable
plug
Check that they are tightly
fastened. Refasten if nec-
essary.
Display unit
ground
Check for corrosion. Clean
if necessary.
Power supply
voltage
Check voltage. If out of
rating correct problem.
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified personnel
should work inside the
equipment.
Battery icon and meaning
Icon Meaning
Voltage is lower than 10 VDC. If the
voltage goes below 9 V, the equip-
ment is automatically turned off.
Voltage is higher than 32 VDC. If the
voltage goes higher than 33 V, the
equipment is automatically turned off.
WARNING
Use the proper fuse.
Fuse rating is shown on the cable.
Use of a wrong fuse can result in fire and
damage the equipment.