Http://www.navionics.com/store/index.php/downloadupload/downup/plugyourchip
Try that address. Don't know much about these units but seems that might be the place to start
SOURCE: Lowrance 250c map update
tring to get an manual for my system i left it and the glove dept. an a cari sold. thank you lowrance iway 250c .
SOURCE: Panasonic CN-NVD905U SD Card map update download
I bought the map update from Panasonic for $150, even tho it was advertised for $300. I called to order it, and it came with a disk and SD Card.
SOURCE: LMS 332c Power cycles on own
i've repaird this by installing a secondary powerswitch and disconnecting the power switch on the keypad. It's an involved repair but it can be done.
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