Maintenance Program; Replacing The Fuse - Furuno FR-7041R-MARK-2 Operator's Manual

3. MAINTENANCE & TROUBLESHOOTING
3.1

Maintenance Program

Regular maintenance is important for good performance. Always keep the
equipment as free as possible from dirt, dust, and water splashes. Make sure all
screws securing the components are properly tightened.
A maintenance program should be established and should at least include the
items listed in Table 3-1.
Period Item
Exposed
nuts and
bolts on
antenna unit
Antenna
radiator
3 to 6
months
CRT
6 months Display unit
to 1 year connectors
3.2

Replacing the Fuse

The 10 A (24 V/32 V) or 15 A (12 V) fuse on the rear panel of the display unit
protects the equipment against reverse polarity of ship's mains, overcurrent, and
equipment fault. If the fuse blows, find
the cause before replacing it. Never
use a fuse rated for more than 10 A (or
15 A), since use of the wrong fuse can
cause serious damage to the
equipment and void the warranty.
3-2
Table 3-1 Maintenance program
Check point
Check for corroded and loosened
nuts and bolts. If necessary,
clean and repaint them. Replace
if heavily corroded.
Check for dirt and cracks on
radiator surface. Thick dirt should
be wiped off with a 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.
The CRT will, in time, accumulate
a coating of dust which tends to
dim the picture. Wipe CRT lightly
with soft cloth to remove dust.
Check for tight connection and
corrosion.
Remarks
Sealing compound may be
used instead of paint. Apply a
small amount of grease
between nuts and bolts for
easy removal in the future.
Do not use solvents (such as
benzine and acetone) for
cleaning. If you need to
remove ice from the antenna
unit, use a wooden hammer
or rubber mallet. Crack on the
antenna unit may allow water
to leak inside, causing serious
damage to circuitry.
Do not use chemical cleaners
to clean any part of the
display unit; they can remove
paint and markings.
If corroded, contact your
dealer for replacement.
CAUTION
Use the proper fuse.
Use of a wrong fuse can cause fire or
equipment damage.