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5-1
5. TROUBLESHOOTING
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
5.1 Easy Troubleshooting
This paragraph describes how to cure operational problems, which can be made by observing the
radar picture and using operator controls and keys without opening the display unit, antenna unit
or other equipment units.
The table below shows user-level troubleshooting procedures.
Problem Remedy
Key beep inaudible Adjust key beep level on RADAR 2 menu referring to
paragraph 1.32.
No own ship mark On the R-type radar, check that SHIP'S MARK ON is selected
at the RADAR 2 menu, referrring to paragraph 1.32. Also, own
ship information (length, width, etc.) should have been entered
in initial settings. Consult a FURUNO representative or dealer
for details. On the IMO type, the own ship mark is not
available.