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PostPosted: Sat Jul 10, 2021 8:53 am 
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Joined: Tue Jan 08, 2013 9:03 am
Posts: 100
We have the last of the analog radars in the 24 mile version, connected to our C120 Classic. In prep for a passage, we powered up the MFD, and tested the radar.

"No data source" error...

As the R&R from the Scanmar housing is a royal PITA, we attempt to avoid doing it unless necessary. However, troubleshooting suggested I start here rather than go up the mast.

A simple R&R of the cable seemed to fix the issue. We'd recently pulled all electronics and dosed each collection with some Corrosion Block, trusting that any maybe-wonky connections would be better for the effort.

So, FF a couple of weeks, and we do another check. Same error. Dang. Can't do anything right then, so don't. FF to today, power up, and it's OK.

Not so fast, Bucko; after starting and displaying just fine, here's another error message. That remained despite several on-off sequences both before turning off the MFD, and full power-up/down cycles.

Another source I'd read with the same issue had found that it seemed to come up after a period of power up, so I tried that. No luck. Another connection remove/replace didn't result in it working.

Next step was to check the presumed power pins (4 of them). Good voltage (13.4) at both pairs. Extension cable of the installer, despite being a relatively long run, had been a 2-conductor which would only work when the engine was running and the alternator was putting out a higher voltage. Finally convinced him that your specs requiring the 4c cable at those lengths was correct, and when it was swapped, it worked.

So, what's the next step? Intermittently (not much of the time) working, all power apparently working, but no data, usually.

Thanks.


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PostPosted: Thu Jul 22, 2021 11:08 am 
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Joined: Tue Jan 08, 2013 9:03 am
Posts: 100
Update July 20:

I borrowed a unit from someone in Vero Beach; it didn't even SEE the
radar (screen: No scanner first line, no data found second line, of
the error message). But enough of swapping in and out surprised me
with a successful run, several times, of our unit, last night.

0530 or thereabouts I repeated last night's successful contact between
upstairs and down, despite failing to have the loaner I secured even
SEE the radar...

Speculation, if this remains duplicable, is that putting the 13-pin
connector on and off again enough times burnished the connections
sufficiently to allow what had been previously slightly less than
pristine (after about 10 years or so) to work. The loaner we got
didn't even SEE the radar, let alone return a 'no data' complaint.

I'll repeat this test several times over the next couple of days, but
as this is the first time that we've had success in lighting it up on
lengthy-separated occasions, I'm encouraged.

I'm also going to get some contact cleaner and hit them all...

July 22: Contact cleaner and many on-off-on burnishing cycles seems
to have done the trick.

Radar comes up with a ~4 second delay between no data source and
warmup. All other functions appear working properly.

I'm declaring victory and finishing the reinstallation!


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PostPosted: Thu Jul 22, 2021 9:29 pm 
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Joined: Fri Jul 27, 2012 9:47 pm
Posts: 539
Location: Niceville FL
Congrats! Sometimes persistence pays off???

_________________
No shirt? No shorts?
No problem!
s/v KAYLA Cape Dory 28 #318
2012 FLSTC Softail Heritage Classic


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