Furuno GD-1700C - Manual (Page 220)

7. MAINTENANCE, TROUBLESHOOTING
7-4
7.4.3 Radar
Requires a network radar.
Radar troubleshooting
If… But… Then…
you pressed the
[POWER/BRILL] key
and the RADAR soft
key to show the radar
picture picture does not appear
•
check that the antenna cable is
firmly fastened.
•
check that radar source is correct.
marks, legends
appear no echo appears
•
check Tx fuse in the power cable.
If it is blown, replace it.
the picture is not
updated or it freezes —
•
check antenna cable.
•
for freeze up, turn the display unit
off and on again.
tuning is adjusted sensitivity is poor
•
magnetron may need to be
replaced. Contact your dealer.
the range is changed radar picture does not change
•
try to hit the [+] and [-] keys again.
•
turn the display unit off and on
again.
there is poor
discrimination in range —
•
adjust A/C SEA.
the true motion
presentation is not
working properly —
•
reselect true motion mode.
•
check if heading and speed data
are input.
range rings are not
displayed —
•
hit the RADAR DISPLY and
RINGS soft keys to display them.