Question about Garmin n vi 300 GPS Receiver

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The GPS receiver on my Nuvi 300 has failed and I need a replacement antenna assembly. Where could I get one?

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  • Charles Humpoletz Sep 30, 2008

    It was a "thanks for trying" rating, not poor but good advice, however I was already looking for a broken unit on eBay.

    Thank you for your wire antenna idea - it now picks up some satellites!

    Can you tell me which part usually fails? I have surface-mount component sourcing and rework facilities but no information to diagnose the failure.

    Thanks a lot for your help

    - C. Humpoletz


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  • 2,124 Answers

Garmin will not sell you one. You only have 2 options:

1. Send it back to Garmin for repair. (Fixya: Do you have a better solution?)
2. Find another unit on eBay that has a bad screen but working antenna and swap the antenna.

- Jim

Posted on Sep 26, 2008

    SHARCNET-USA Sep 26, 2008

    Thanks for the "poor" rating. :( How do you know its bad? Because it wont acquire a satellite lock? Have you tried using an external antenna? There is a known issue with the Nuvi antennas where a part has failed causing the antenna to only accept signals from the external antenna jack. I have verified this issue on several Nuvi's. Try inserting a piece of wire, a few feet long (one strand) with no shield into the jack and sit back and see if it finds the satellites. I am working on a fix for this problem.

    - Jim

    SHARCNET-USA Sep 30, 2008

    I am researching this now. I have heard on other forums that it's a diode that fails but I haven't confirmed it. Perhaps it's a pin diode that detects RF and switches the receiver to either the internal or external antenna.

    - Jim


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