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3-1
3. MAINTENANCE &
TROUBLESHOOTING
This chapter provides information necessary for keeping your unit in good
working order and remedying simple problems.
WARNINGWARNING
Do not open the equipment.
Hazardous voltage which can
cause electrical shock exists
inside the equipment. Only
qualified personnel should
work inside the equipment.
3.1 Maintenance
Regular maintenance is important for optimum performance. A maintenance
program should be established and should at least include the items shown in
the table below.
Maintenance program
Item Check point Remedy
Display unit connectors Check for tight connection. Tighten loosened connectors.
LCD The LCD will, in time,
accumulate a coating of dust
which tends to dim the picture.
Wipe LCD lightly with soft
cloth to remove dust.
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. Do
not use solvents such as
thinner, acetone or benzene
for cleaning.
Ground terminal Check for tight connection and
corrosion.
Clean or replace ground wire
as necessary.