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10-1
10. MAINTENANCE &
TROUBLESHOOTING
10.1 Maintenance
Regular maintenance is important for continued performance. Important points to
be checked from time to time are shown below.
Do not open the equipment.
Hazardous voltage which can cause
electrical shock exists inside the
equipment. Only qualified personnel
should work inside the equipment.
WARNING
Location Check point Remedy
Antenna unit Check for loosened and
corroded bolts.
Tighten loosened bolts. Replace
heavily corroded bolts.
Check connection point for
watertightness.
Check connector for tightness
and corrosion.
Antenna cable
Check cables for damage.
Replace damaged parts.
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.