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7-1
7. 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.
7.1 Preventive Maintenance
Regular maintenance is important for optimum performance. A maintenance
schedule should be established and should at least include the items 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 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.