Simple Troubleshooting; General; Radar - Furuno 1823C-BB Operator's Manual

7. MAINTENANCE, TROUBLESHOOTING
7.4

Simple Troubleshooting

This section provides simple troubleshooting procedures which the user can
follow to restore normal operation. If you cannot restore normal operation do not
attempt to check inside the unit. Any trouble should be referred to a qualified
technician.
7.4.1

General

If...
you cannot turn on the
power
there is no response
when a key is pressed
7.4.2

Radar

GD-1900C-BB requires a network radar.
If...
you pressed the
[POWER/TX] key and the
D:RADAR TX soft key to
show the radar picture
marks, legends appear
the picture is not updated or
it freezes
tuning is adjusted
the range is changed
there is poor discrimination in
range
the true motion presentation
is not working properly
the range rings are not
displayed
7-4
General troubleshooting
• check for blown fuse.
• check that the power connector is firmly fastened.
• check for corrosion on the power cable connector.
• check for damaged power cable.
• check battery for proper voltage output (10.8 to 31.2 V).
• turn off and on the power. If there still is no response the key may
be faulty. Request service.
Radar troubleshooting
But...
nothing appears on the
display
no echo appears
—
sensitivity is poor
radar picture does not
change
—
—
—
Then...
• check that the antenna cable is
firmly fastened.
• check if radar source is correct.
• check Tx fuse in power cable.
If it is blown, replace it.
• check antenna cable.
• for freeze up, turn the
processor unit on and off
again.
• magnetron may need to be
replaced. Contact your dealer.
• try to hit the [+] and [-] keys
again.
• turn the processor unit off and
on again .
• adjust A/C SEA.
• reselect true motion mode.
• check if heading and speed are
input.
• hit the B:RADAR DISPLY and
C:RINGS soft keys to display
them.
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Then...