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11-1
11. MAINTENANCE &
TROUBLESHOOTING
11.1 Maintenance
Regular maintenance is important for continued performance. Important points to be
checked from time to time are shown below.
Location Check point Remedy
Antenna unit Check for loosened and cor-
roded bolts.
Tighten loosened bolts. Replace heavily
corroded bolts.
Antenna cable Check connection point for
watertightness.
Replace damaged parts.
Check connector for tightness
and corrosion.
Check cables for damage.
Display unit connectors Check for tight connection. Tighten loosened connectors.
Ground terminal Check for tight connection and
corrosion.
Clean or replace as necessary.
Display unit Dust and foreign material on
the display unit.
Dust or dirt may be removed from the
cabinet with soft cloth. Water-diluted
mild detergent may be used if desired.
DO NOT use chemical cleaners to
clean the display unit; they may remove
paint and markings. Wipe the LCD
carefully to prevent scratching, using
tissue paper and an LCD cleaner. To
remove dirt or salt deposits, use an
LCD cleaner, wiping slowly with tissue
paper so as to dissolve the dirt or salt.
Change paper frequently so the salt or
dirt will not scratch the LCD.
Transducer Check the transducer face for
marine life, which can reduce
sensitivity.
Remove marine life from the transducer
when drydocking the boat. Use a piece
of wood to remove any marine life.
Do not open the equipment.
WARNING
Hazardous voltage which can cause
electrical shock exists inside the
equipment. Only qualified personnel
should work inside the equipment.
NOTE
Do not apply paint, anti-corrosive sealant
or contact spray to coating or plastic
parts of the equipment.
Those items contain organic solvents that
can damage coating and plastic parts,
especially plastic connectors.