Question about Garmin Nuvi 660 GPS Receiver

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My garmin nuvi 360 will not aquire satellites, or loose them quickly when it does

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  • Garmin Master
  • 2,130 Answers

Please see this link on how to get this problem resolved.


http://www.sharc.net/gps_antenna_repair.htm

- Jim

Posted on Apr 25, 2010

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6ya6ya
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Posted on Jan 02, 2017

sharcnet
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SOURCE: Lost satellite reception

This problem is not caused by poor solder joints. It's caused by a defective part. We sent a "marked" defective unit to the repair shop mentioned above and upon its return, disamantled the GPS receiver assembly and made the following evaluation:

1. The shop did NOT replace the defective component causing the initial problem in the 1st place. The defective part was STILL in the circuit.

2. The shop placed a wire jumper between the internal antenna and the external antenna port. This type of modification places a +2.5VDC bias on the internal antenna and essentially shorts the internal antenna to the external antenna (when connected), giving unpredictable results. It also affects the circuit impedance and signal strength. This is not the correct way to resolve this issue.

3. The defective part needs to be replaced with a higher rated part. This type of repair returns the unit to full functionality and allows the unit to properly switch between the internal and external antenna as it was intended to do by design

- Jim
SHARCNET-USA
Comments: I will aso add, as the part deteriorates, it becomes resistive and can eventually short out and shunt the incoming RF signal to ground......EVEN with the jumper procedure performed by the shop mentioned above.

- Jim
SHARCNET-USA

Posted on Feb 17, 2010

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1 Answer

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This is a common problem on the Nuvi 3xx and 6xx series and is caused by a failed component. Please see this link for troubleshooting information.

http://www.sharc.net/gps_antenna_repair.htm

- Jim

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___________________
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