37
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
Care of Display
Unit
Dust or dirt on the cabinet can be removed
with a soft, dry cloth. For stubborn dirt, water-
diluted mild detergent can be used. In this
case, wipe the cabinet with a dry cloth after
using detergent. Do not use solvents such as
thinner, acetone or benzene to clean the unit.
They can remove paint and markings.
To clean the LCD screen, use the special
LCD cleaning cloth provided with your sound-
er.
3.3
Transducer Main-
tenance
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 ma-
rine life with a piece of wood or fine-grade
sandpaper.
3.4
Fuse Replacement
The two fuses (Type: FGMB 125V 7A PBF,
Code No.: 000-157-493-10) inside the display
unit protect the system from reverse polarity
of the power supply and equipment fault. If a
fuse blows find the cause before replacing it.
If it blows again after replacement, contact
your dealer for advice.
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Hazardous voltage exists inside the
equipment. Only qualified personnel
should work inside the equipment.
Use the proper fuse.
Use of a wrong fuse can result in damage to the
equipment and cause fire.
IMPORTANT
Do not apply paint, anti-corrosive sealant or
contact spray to coating or plastic parts.
Those items contain organic solvents that can
damage coating and plastic parts, especially
plastic connectors.
Item
Action
Transducer
cable
Check cable for damage.
Power cable,
transducer ca-
ble plug
Check that they are tightly
fastened. Refasten if neces-
sary.
Display unit
ground
Check for corrosion. Clean if
necessary.
Power supply
voltage
Check voltage. If out of rat-
ing, correct problem.