Question about Garmin GPSMAP 172C GPS Receiver

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Antenna input shorted

When I turn on my GPSMAP 172c it says antenna input shorted, in the manual under, "warning messages" it says check your antenna connections. But this unit has an internal antenna.

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  • Anonymous May 01, 2009

    Garmin 172c internal antenna cannot receive satellites under open sky....

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  • 114 Answers

Contact garmin sounds like a defective unit

Posted on Mar 10, 2009

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The antenna warning is the key, the swr on the antenna/feedline is very high. check antenna connections, coax and connectors for damage

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Sounds like bad SWR. Check antenna ground. If mag mount, make sure mag and whe you put it is very clean. Check antenna where whip comes in to coil or base. Check pl259 with vom for continuity, open or shorts. This will probably solve the problem. DO NOT TRANSMIT WITH HIGH SWR. YOU CAN BURN OUT POWER TRANSISTOR. HOPE IT HELPS.
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That unit uses an external antenna. Check that the antenna is connected properly and that the antenna has power.

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Hello, I am currently having a problem with my Audiosonic KM0767 Standard Definition Set Top Box. When we first bought it we wired up all the plugs and it worked great. We then moved onto Foxtel...


did you switch the TV's incoming signal to digital antenna? For the cable box it was probably set to cable antenna or analog inputs, not all TV's have automatic switching for antenna feeds. My Mitsubishi has 1 digital and 1 analog antenna input and the cable box will only work through the antenna input if it's the analog antenna input and it's tuned to channel 3 or 4, -(or through a seprate HDMI, PROSCAN, SVCR,or a yellow RCA plug input)- and when the analog antenna input is selected the TV will tune all analog cable channels that the cable service offers if a box is not used. likewise the TV will not tune any channels at all if it's set to digital antenna inputs. It will tune all local channels only when set to digital antenna inputs.

Dec 26, 2010 | Televison & Video

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Garmin GPSMAP 172C - cannot find satellites (WAAS)?


WAAS is a seperate service from GPS. It provides GPS corrections so if you can not get WAAS there is no big problems. you unit just wont be as accurate as normal. WAAS only is for North America and EGNOS for Europe. You may want to turn WAAS off for now. I suggest trying a update for the unit. You will need a memory card and Garmin USB programmer. Then just go to garmins site to get the latest update. If you need a USB programmer feel free to Contact GPSCity.ca or GPSCity.com. They are the leading experts in Garmin GPS.

Jul 12, 2010 | Garmin GPSMAP 172C GPS Receiver

1 Answer

GPSMap 172c Can not read Garmin Data Card


I have the Sounder 178C. It will only work with 128 Mb Cards (or smaller). It does not work with the 256Mb Cards - says "Reading Card" forever.

Per Gramin, I had to buy the 128 Mb card and DVD map update. Then program the card with a USB data programmer to make it work.

May 01, 2009 | Garmin GPSMAP 172C GPS Receiver

1 Answer

No satelite acquisition for garmin 172c


you need to go outside in an open area with no trees around and turn the garmin on untill it receives a sat connection it can take several minutes for it to find it

Dec 04, 2008 | Garmin GPSMAP 172C GPS Receiver

2 Answers

Locks up after a few seconds/have to kill power to reset


This may help. Mine has the GPS antenna build into the bracket at the back. I removed the bracket and the unit did not go into the error screen and the sounder worked fine. The GPS would not locate but it has not antenna attached so DOH!! I have orderd a new antenna with the BNC connector and will post if that fixes the problem. At this point I'm guessing its a blow GPS antenna.

Dave

Oct 12, 2008 | Garmin GPSMAP 168 Sounder GPS Receiver

1 Answer

Display won't come up anymore


The power switch usually allows you to adjust the backlight with a short tap there should be a scroll bar, use the four way toggle up to increase the back light.

Jun 16, 2008 | Garmin GPSMAP 172C GPS Receiver

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