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Furuno Magnatron

Old 10-11-2008, 06:18 PM
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Default Furuno Magnatron

Hi All, I have a Furuno RDP-143 display with a Furuno RSB-0071 4KW 36 NM Radome antenna. It seems the magnatron is not spinning and the alarm goes off in the display head. No trouble codes appear. I went through the menus and nothing has changed and Watchman is off. It was working fine Thursday early AM using it, but Friday night went I turned it on the alarm sounded in about 15 seconds and after rebooting and checking the menus I than noticed no motor noise. On the self tests everything checks out OK. Its the weekend and Furuno's closed , am hoping I can get some advice here. Not sure how to check power at the motor without transmitting the antenna, do not think it is a good idea to transmit while up on the hardtop with a DVM meter at eye level.

Thanks in advance, Pete
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Old 10-11-2008, 08:08 PM
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Default Re: Furuno Magnatron

You might see if the belt broke and antenna is not spinning. (just an idea) It doesn't take much to take the lid off and check.
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Old 10-12-2008, 05:56 AM
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Default Re: Furuno Magnatron

I had the cover off, it is direct drive from a servo motor with a gear to the larger element drive gear. I also took off the 2 metal covers off the electronis boards and made sure all the connections were tight.

Pete
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Old 10-13-2008, 07:03 PM
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Default Re: Furuno Magnatron

Found a pushed in pin in the connector doing a continuity test on the harness from the display head to the antenna, looks like the locking tab has broken off some how. Will order a few pins from Furuno, have a toothpick piece in there for the time being holding it in.

Pete
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