Filter
Top Products
4-1
4. MAINTENANCE
DANGER: Electrical Shock Hazard
This equipment contains high voltages which can cause death at several
internal circuits including a cathode ray tube (CRT) which uses several
thousand volts. Any internal adjustment, servicing and repair shall only be
performed by qualified service personnel totally familiar with electrical
circuits and servicing of the equipment. A residual charge remains in
capacitors and other devices several minutes after turning off the power.
It is therefore essential to wait at least 3 minutes to allow residual charge to
subside before accessing the inside of the equipment. Special care must be
taken when approaching the following parts:
• Power supply circuit (Display unit and separate power supply units)
• CRT circuit (Display unit)
• Modulator circuit and magnetron (Antenna unit or separate transceiver
unit)
• Motor drive circuit (Antenna unit)
WARNING: When Working on the Antenna Unit
Wear a safety belt and a hard hat when working on the antenna unit.
Always make sure that the radar is POWERED OFF and the Antenna
switch in the display unit is OFF before working on the antenna unit.
Also take all steps to ensure that the radar will not be accidentally operated
by someone else, to prevent the potential risk of being struck by the
rotating antenna and exposure to RF radiation hazards.
WARNING
DANGER
Periodic checks and maintenance are important for proper operation of any electronic systems. This
chapter contains maintenance instructions to be followed to obtain optimum performance and the long-
est possible life of the equipment.
4.1 Periodic Maintenance Schedule
Interval Check point Check and measures Remarks
Weekly Display unit Periodically clean the exterior of
display unit using dry soft clean. Use
of commercially available CRT
cleaner (spray) having antistatic
effect is recommended.
CRT screen produces static
charge which would attract dust.
DO NOT use strong solvent like
paint thinner or abrasive cleaners
for cleaning.
Dust and dirt on CRT creates
symptoms similar to poor
sensitivity.
(Continued on next page)