Radar - Furuno NAVNET 1722 Operator's Manual

7. MAINTENANCE, TROUBLESHOOTING
7.4.2

Radar

Requires a network radar.
If...
you pressed the
[POWER/BRILL] key and
the RADAR TX soft key to
show the radar picture
marks, legends appear
picture not updated or
picture freezes
tuning is adjusted
range changed
poor discrimination in
range
true motion presentation
not working properly
range rings are not
displayed
7-4
Radar troubleshooting
But...
nothing appears on the display
no echo appears
—
sensitivity is poor
radar picture does not change
—
—
—
Then...
! check that the signal cable between the
display unit and the antenna is firmly
fastened.
! Check that radar source is correct.
! check in the power cable. If it is blown,
replace it.
! check signal cable.
! turn the display unit off and on again.
! Magnetron may need to be replaced.
Contact your dealer.
! try to hit the [+] and [-] keys again.
! turn the display unit off and on again.
! adjust A/C SEA.
! Check heading and speed data for input.
! reselect true motion mode.
! Hit the RADAR DISPLY and RINGS soft
keys to display them.