6. MAINTENANCE, TROUBLESHOOTING
6-2
6.1 Periodic Maintenance Schedule
Regular maintenance is essential to good performance. A regular maintenance pro-
gram should be established and should at least include the items in the table below.
Interval Check Point Checks and measures Remarks
As
required
The LCD will in time
accumulate a layer of
dust which tends to
dim the picture
Check that dust or dirt is not
on the display. Wipe it care-
fully to prevent scratching.
For difficult to remove dirt or
salt deposits, use a cloth
made wet with water and
neutral detergent (less than
1% detergent). Squeeze the
cloth dry then clean the dis-
play. When the display is
clean, gently wipe the dis-
play with a clean, soft, dry
cloth, to prevent scratching.
Processor unit cleanli-
ness
Dust and dirt may be re-
moved with a soft cloth.
Do not use chemical-based
cleaners to clean the processor
unit. They can remove paint and
markings.
3 to 6
months
Exposed nuts and
bolts on antenna unit
Check for corroded or loos-
ened nuts and bolts. If nec-
essary, clean and repaint
them thickly.
Replace if heavily corroded.
Sealing compound can be used
instead of paint. Apply a small
amount of grease between nuts
and bolts for easy removal in fu-
ture.
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 adhe-
sive 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 or
plastic head hammer. Cracks on
the unit may cause water in-
gress, causing serious damages
to internal circuits.
Terminal strips and
plugs in antenna unit
(TECHNICIANS only)
Open antenna cover to
check terminal strip and
plug connections inside.
Also check the rubber gas-
ket of antenna covers for
deterioration.
When closing antenna covers in
position, be careful not to catch
loose wires between covers and
unit.
Adhesive (marine
sealant) on nuts and
bolts
Check for deteriorations
such as splits and peeling.
Re-apply as required. For
areas with extensive deteri-
oration, remove the existing
adhesive before re-applying
a fresh coat.
Adhesive deterioration can result
in water leakage, which can
cause corrosion.
6
months
to one
year
Terminal strips, sock-
ets, earth terminal on
processor unit
(TECHNICIANS only)
Check for loose connec-
tions. Check contacts and
plugs for proper seating,
etc.
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