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11. MAINTENANCE & TROUBLESHOOTING
11-2
11.2 Maintenance
Regular maintenance is vital for maintaining performance. Following the procedures below
will help keep the equipment in top operating condition.
Maintenance check points
Item Check Point Remedy/Remarks
Antenna Check for physical damage and
corrosion.
Replace damaged parts.
Wire
antenna
Check that the antenna is properly
spanned and separated sufficiently
from metallic structures.
If necessary, re-span antenna.
Insulators
for antenna
Check for salt water deposits on
insulators. Check that connection at
the lead-in insulator is tight and
rust-free.
Replace damage insulators. Remove
salt water deposits. Clean with fresh
water, then dry. Remove rust, then
tighten bolts and lock nuts. Cover
metallic surface with sealing
compound.
Antenna
coupler
• Check condition of antenna terminal,
ground, coaxial cable and control
cable.
• Check that coupler lid and cable
glands are firmly secure.
Check for physical damage, corrosion
and salt water deposits.
• Tighten loosened
connections.
• Fasten lid firmly and evenly to
prevent water leakage.
• Replace if damaged.
Control
unit
• Check ground connection, control
cable, and external equipment.
Confirm that there are no objects on
the top of the control unit.
• Remove dust from control unit with
soft cloth.
Note: Do not use chemical cleaners to
clean the control unit; they can remove
paint or markings or deform the
equipment.
• Tighten loosened
connections; remove foreign
material from connectors.
• Remove any objects.
• 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.
Transceiver
unit
• Check connection at signal cable,
coaxial cable, control cable, power
cable, and navigator.
• Confirm that there are no objects on
the top of the cabinet.
• Tighten loosened connections;
remove foreign material from
connectors.
• Remove any objects.
Power supply
• Check that the supply voltage at
transmission is within the rated range
(21.6 to 31.2 VDC at the power
connector).
• If not within the range, check
ship’s mains or ship’s battery.
Low voltage may cause
erratic operation.