22. Maintenance and Troubleshooting
22-5
22.5 Troubleshooting
The troubleshooting table below provides common faults and the remedy with which to restore normal operation. If
you cannot restore normal operation do not check inside the equipment - there are no user-serviceable parts inside.
Radar troubleshooting
If… Then… Remedy
the power cannot be turned on
• power connector may have
loosened.
• ship’s mains is off.
• fuse has blown.
• Check connector.
• Check ship’s mains.
• Replace fuse.
the power can be turned on but
nothing appears on the display
• brilliance is too low.
• the ambient temperature is less
than 0
°C (32°F).
• Adjust brilliance.
• The heater is warming the chart
processor unit. The display
appears in approx. 10 minutes.
key doesn't beep when operated
• key beep is turned off. • Turn on key beep from the menu.
Picture not updated or picture
freeze.
• suspect video freeze. 30 seconds
after the picture freezes the
buzzer sounds, the ALARM
ACK key blinks and alarm
signal is output.
• Turn the power off and on again.
marks and noise appear but no
echoes
• fuse may have blown. • Check fuse in processor unit.
picture does not change even
though range is changed.
• suspect faulty range key or video
freeze.
• Hit the RANGE key several
times. If nothing happens, turn
the power on and off again.
only two index lines are displayed
• check index line interval setting. • Refer to section 2.20
Parallel
Index (PI) Lines
for how to adjust
index line interval.
range rings are not displayed
• range rings are turned off. • Turn on the range rings from the
Color menu.
ARP target is not tracked correctly
• sea surface reflections, etc. are
masking ARP target.
• Adjust A/C SEA and A/C RAIN
to suppress sea and rain clutters.
sensitivity is poor
• suspect 2
nd
trace echo or soiled
radiator.
• Remove 2
nd
trace echo; clean
radiator.
