Furuno NAVNET 1833 - Manual (Page 213)

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 shown in
the table below.
Maintenance program
Item Check point Remedy
Display unit
connectors Check for tight connection. Tighten loosened
connectors.
CRT 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. Do not use chemical
cleaners to clean any part of
the display unit; they can
remove paint and markings.
Ground terminal Check for tight connection and
corrosion. Clean or replace ground
wire as necessary.
7.2 Replacement of Battery
A battery fitted on a circuit board inside the display unit preserves data when the
equipment is turned off, and its life is about three years. When its voltage is low
the battery icon ( ) appears at the top of the display. When the icon appears,
contact your dealer to request replacement of the battery.
Parts Name Type Code No.
Lithium battery CR2450-F2 ST2 000-133-495