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Use the proper fuse.
Use of a fuse of the wrong amperage will
damage the equipment and void the
warranty.
CAUTION
4. MAINTENANCE,
TROUBLESHOOTING
WARNING
Do not open the equipment.
Hazardous voltage which can
cause electrical shock exists
inside the equipment. Only
qualified personnel should
work inside the equipment.
4.1 Maintenance
Regular maintenance is important for good performance. A maintenance program should be
established and should at least include the items listed in Table 4-1.
Table 4-1 Maintenance program
Period Item Check point Action
Fixing bolts for
antenna unit
Check for corrosion and if tightly
fastened.
Replace corroded bolts. Coat new
bolts with anticorrosive sealant.
Antenna unit
cleanliness
Check for foreign material.
(Foreign material on the
antenna unit can cause a
considerable drop in sensitivity.)
Clean the antenna unit with a
freshwater-moistened cloth. Alcohol
may be used. Do not use
commercial cleaners to clean the
antenna unit; they can remove
paint and markings.
Antenna unit
cover
Check for cracks. Permanent
damage to the unit’s circuitry will
result if water leaks inside.
If a crack is found, it should be
temporarily repaired by using a small
amount of sealing compound or
adhesive. The unit should then be
brought to your dealer for permanent
repairs.
3 to 6
months
LCD The LCD will, in time,
accumulate a coating of dust
which tends to dim the picture.
Wipe the LCD gently with a soft
cloth. Do not use commercial
cleaners to clean the LCD; they can
remove paint and markings.
6 months to
1 year
Display unit
connectors
Check for tight connection and
corrosion.
If corroded, contact your dealer
about replacement.
4.2 Replacing the Fuse
The fuse (5A) in the power cable protects the
equipment against reverse polarity of ship’s mains,
overcurrent and equipment fault. If the fuse blows, find
the cause before replacing it.