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8-1
8. MAINTENANCE,
TROUBLESHOOTING
This chapter provides information necessary for keeping your unit in good working order
and remedying simple problems.
WARNING
Do not open the equipment.
Hazardous voltage which can
cause electrical shock exists
inside the equipment. Only
qualified personnel should
work inside the equipment.
NOTE
Do not apply paint, anti-corrosive sealant
or contact spray to coating or plastic
parts of the equipment.
Those items contain organic solvents that
can damage coating and plastic parts,
especially plastic connectors.
8.1 Preventive 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.