Furuno FAR-21 7-BB Series, Operator'S Manual

Page: 236 / 305

6. MAINTENANCE, TROUBLESHOOTING
6-2
6.1 Periodic Maintenance Schedule
Regular maintenance is essential to good performance. A regular maintenance
program should be established and should at least include the items shown in
the table below.
Maintenance schedule
Interval Check point Check and measures Remarks
The LCD will in
time accumulate a
layer of dust which
tends to dim the
picture Wipe the LCD carefully to
prevent scratching, using
tissue paper and an LCD
cleaner. To remove stubborn
dirt, use an LCD cleaner,
wiping slowly with tissue
paper so as to dissolve the
dirt. Change paper frequently
so the dirt will not scratch the
LCD. Do not use chemical-based
cleaners to clean the LCD. They
can remove paint and markings. When
needed
Processor unit
cleanliness Dust and dirt may be
removed with a soft cloth. Do not use chemical-based
cleaners to clean the processor
unit. They can remove paint and
markings.
Exposed nuts and
bolts on antenna
unit Check for corroded or
loosened nuts and bolts. If
necessary, clean and repaint
them thickly. Replace them if
heavily corroded. Sealing compound may be used
instead of paint. Apply a small
amount of grease between nuts
and bolts for easy removal in
future.
Antenna radiator Check for dirt and cracks on
radiator surface. Thick dirt
should be wiped off with soft
cloth dampened with fresh
water. If a crack is found,
apply a slight amount of
sealing compound or
adhesive as a temporary
remedy, then call for repair. Do not use chemical-based
cleaners for cleaning. They can
remove paint and markings. If
you need to remove ice from the
antenna unit, use a wooden
hammer or plastic head
hammer. Crack on the unit may
cause water ingress, causing
serious damages to internal
circuits.
3 to 6
months
Terminal strips and
plugs in antenna
unit
(TECHNICIANS
only)
Open antenna cover to check
terminal strip and plug
connections inside. Also
check the rubber gasket of
antenna covers for
deterioration. When closing antenna covers in
position, be careful not to catch
loose wires between covers and
unit.
6 months to
one year Terminal strips,
sockets, earth
terminal on
processor unit
(TECHNICIANS
only)
Check for loose connections.
Check contacts and plugs for
proper seating, etc.