Raytheon rl70 My chart plotter and radar suddenly came up with the message "no fix". A few days later the radar started working again but the plotter still cant get a fix,,,any sudgestions? They are the old monochrome rl70's separate plotter unit and rader.I tried taking the card out and cleaning it to no avail,,Many thanks in advance

I've had the same problem. before replacing the antenna, try to reset the antenna by removing power to the Raystar 120. Disconnect power by either turning off all batteries or disconnecting the red wire from the antenna at the point where it enters the junction box for the chartplotter. This action effectively removes all memory from the antenna and resets it to factory settings. There is a lithianium battery in GPS antenna that holds memory data in the antenna. Disconnecting the power to the antenna for a few seconds clears the memory.

This is exactly what I did and when I turned the chartplotter back on, my Raystar 120 immediately began working again.

My 2002 vintage RL70 system had continual "no fix" or "lost fix" messages through 2006 and 2007 seasons. Raymarine rep suggested replacing the 120 GPS receiver with the 125 receiver. I did this past winter and the problem disappeared. The 125 receiver is better technology....not one "lost fix" since replacement.

I have this unit for sale brand new, with everything with it.
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www.shaverstreetmarine.com

Your GPS unit is broken. Check the connections and if they are all ok - buy another unit.