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chrisravosa

I bought a 1990 Albemarle 24 with twin C70 units, they worked fine for the first season. Went to take them off for the winter to store them inside, and the darn radar pins broke on the male connector. Oh well, il just plug the radar in the other unit, checked the back of the other unit and same story a few broken pins. So this spring I bought a used C80 and put it on, got a message (No data source). Cable was fairly old, replaced it with a new old stock cable, same issue "no data Source". I went this season without radar (no fun at all). At the end of this season, I bought a third party screen without radar and I am planning on keeping my C80 for solely radar purposes and it would be nice to have an extra fish finder and GPS. I thought maybe the C80 I bought was defective because the buyer mentioned that he was selling it because he upgraded to a new system and he claimed the radar did not work, but upon de-installation the radar wire was shot. So never the less I bought ANOTHER used C80 a week ago off eBay to test this, same thing "No data source". So I know its not the cable or the unit itself. I opened the top of the radome and its clean as a whistle and im getting proper voltage to the positive and negative under the dome.

Now I did the cable test as pictured below (found this on a forum) and my results are as follows (not good) im assuming this is an issue with the radome? THere are some pics aswell, when I unplug the radar with the unit on, nothing changes no message or the icon doesn't change. Are there fuses or relay under the Radome?
Video: 46kohms (good)
Azimuth: 4.7kohms (supposed to be 10k)
Trigger: 0kohms (supposed to be 10k)

***Chuck - Raymarine - Moderator***

Welcome to the Raymarine Forum Chris,

I generally recommend that caution be exercised when considering the purchase of one of MFDs of this generation ... particularly with regard to the availability of cartography, and that parts and service are no longer available many these legacy products (i.e. C/E-Series Classic MFDs, 2D/4D/RD218/RD424 radomes, DSM250/30/300). It accordingly recommended that any second hand product be purchased only after having verified its operation and/or securing a guarantee of operation from the seller.

As indicated within the referenced FAQ, with regard to video, analog, and trigger lead tests no tolerances are specified, the tester will be primarily seeking to determine whether the resistance checks indicate any open circuit readings. Your tests indicate an open circuit within the Trigger test. Failure of the radar cable test may necessitate replacement of the radome connector, radar cable, radome and/or the radar display. The cable may be ruled out by unplugging the radome connector plug from the radome and radar plug from the MFD and then performing continuity tests of the cable's trigger leads. If continuity is verified, then it likely that the radome's circuitry has suffered a failure, as the radar circuitry within MFDs rarely failed. While Raymarine's ability to repair this generation of radomes ended some time ago, you may want to consider contacting SeaWire Marine, Inc. (305.489.1600) to determine whether they can still service your radome.