HELP Furuno radar not working model 1830

In article <1150151335.392958.222710.TakeThisOut@h76g2000cwa.googlegroups.com>,
"jackcathy1@gmail.com" <jackcathy1.TakeThisOut@gmail.com> wrote:

> Can anyone help. My radar seems to be working OK but I get no
> targets, Not even land. What should I check ???
>
When you turn up the "Gain" all the way do you get "sparkles"?
When you adjust the "Tune" do very faint images deisplay with
the "Gain" all the way up?

If Yes, to Question One, and No to Question Two then you probubly lost
the Magnitron or Modulator, and it is going to cost you $350+ to get
a tech to install a new one.

If No, to Question One, and No to Question Two, then you MAY have a
broken Video Coax Connection coming from the antenna to the display.

If No, to Question One, and Yes, to Question Two, then you MAY have
a smoked MMIC, and that is going to cost you a $500+ to have a tech
replace.

In any case, you really should have a "Qualified Marine Radar Tech"
come out and look at the radar.


Bruce in alaska who used to do this for a living........now just...
reTIRED......
--
add a <2> before @
 >> Stay informed about: HELP Furuno radar not working model 1830 

Check the video cable if there is a junction block inline with cable (like a
sailboat has at bottom of mast). The shielded video wire has a very fine
center conductor that likes to break at junction blocks.
Lee Haefele
Nauticat 33 Alesto
"Lynn Coffelt" <coffelt2 DeleteThis @comcast.net> wrote in message
news:e6ljmg$jol$1@nntp.aioe.org...
>
> <jackcathy1 DeleteThis @gmail.com> wrote in message
> news:1150151335.392958.222710@h76g2000cwa.googlegroups.com...
>> Can anyone help. My radar seems to be working OK but I get no
>> targets, Not even land. What should I check ???
>>
> One common situation on the 1830 was (is) caused by turning the "A/C
> SEA" control "up" (or clockwise) and effectively eliminating close-in
> targets. This is the center knob of the three at the top of the control
> panel. Make sure the knob is in the "out" position too..... that is, not
> pushed "in".... (sort of a dual function knob)
> This is a simple tip, and certainly does not replace the good advice
> from Bruce from Alaska!
> Old Chief Lynn (and ex Furuno repairman)
>
>
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>
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 >> Stay informed about: HELP Furuno radar not working model 1830 

<jackcathy1.RemoveThis@gmail.com> wrote in message
news:1150151335.392958.222710@h76g2000cwa.googlegroups.com...
> Can anyone help. My radar seems to be working OK but I get no
> targets, Not even land. What should I check ???



As bruce said, pls. check for noise on screen.

1 - turn gain to max
2 - turn off IR
3 - turn A/C to min.
4 - choose range 12/16nm.

If noise is shown on display, you may have a defective modulator PCB model
MD-7918, or Magnetron (cant remember which type, my guess is 9M302).

If no noise on display, check videocable ( small coax cable connectet to
white plug in radar antenne). Otherwise reciever may be defective.

Most likely if fault is noise, but no echo then Modulator circuit board is
defective. If you know a little about electronics and can use a
multimeter, I can help your repair this circuit board. Otherwise maybe
Furuno have a replacement board.

Best regards

Rune
Furuno Marine Technician
 >> Stay informed about: HELP Furuno radar not working model 1830