Question about Garmin StreetPilot C330 GPS Receiver

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Failure to acquire satellites in previously known good reception area...

I have had this unit for 2 years now and it has been working flawlessly until the battery went dead. I replaced the battery using a suggestion found on this site with a 3.7 volt Lion 2600mah unit and that problem is solved. Now I get bad satellite reception. I have double checked the installation of the gps module with the can facing down and the gps antenna facing up. I did both the under the bezel reset and the master reset holding down the right corner while turning on the unit and completed both successfully. The unit does get a signal intermittently and I lose signal quite often and it asks me if I am indoors, etc. Do the gps modules go bad? This went from a fast starting up and locking in unit to a piece of crap that seldom receives the satellites. Any suggestions????

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  • CCoastGuy Dec 21, 2007

    I have found a solution for my failure to acquire satellites! Apparently, the extremely tiny coax that connects to the gps module from the face unit has an extremely fragile shielding. The shielding is used as a ground and along with the center conductor gives you a signal source and a ground, coax. On my unit the ground shielding had seperated which required unsoldering the center conductor and ground and redressing the connection and then resoldering the center conductor and shielding to the gps module. Once repaired my gps gets 4 bars and is up and ready for navigation in under 2 minutes! I had to use a magnifying glass to see that the shielding had seperated since this coax is like 24 guage or something extremely tiny. I would imagine that without too much jostling around over time these tiny ground shielding wires could vibrate to an open connection for the ground. When I redressed and resoldered the connection I also took some electrical tape and taped the wire down similar to the way the remainder of the wire is taped on the face unit to prevent the same problem (I would imagine).

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These units are delicate, and not designed to be serviced by most users. Most people having this issue would have to return the unit to Garmin for service.

Posted on Feb 10, 2008

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I have been experiencing the same problem many have been having with the Nuvi 6xx and 3xx series giving an error message “Lost satellite reception”.

My problem started mid April 2008 and got progressively worse. I would use my GPS on weekends and it would work perfectly for the first 10 – 30 minutes and then would loose satellite reception, rendering it useless.

I bought my Nuvi 660 when it first came out in October 2006 for just under $700 and is now out of the 1 year warrantee.
I called Garmin Technical Support and we checked my Software version (4.40) and more importantly my GPS SW version (3.00). According to the tech I had on the phone, the GPS SW version was more important then the Software version. It was in fact already updated to 3.00, I did master reset, after master reset, but regardless, nothing helped.

I contemplated what I should do.
Return mine and get a refurbished unit from Garmin for $225 with only a 90 day warrantee?
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Buy a new Nuvi 2xx series with fewer features for $200 to $275.
Buy a Megellian GPS?

I read through this forum and came across one person that was told by Garmin “that they are aware of an issue with some Nuvis involving the failure of a diode in the unit that senses whether or not an external antenna is connected.” Apparently this diode failure is caused from the high heat these units experience from being left in a hot car for long periods of time. This would explain why mine would work in the beginning and then die.

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