GPS-250: No data, no position

[Fly4fude]

Hi all!

Not receiving any data from my GPS-250.   Dynons showing POS1 active, serial port 5 on both 7" but no TX/RX data being received.  Wires all checked for continuity.  No Map being drawn, and a big RED X with the words NO GPS SIGNAL.

QUESTION:  Do you have to complete MAGNETIC CALIBRATION before the GPS will hook up?

NOTE:  Aircraft has been out of hangar in a clear area for over an hour on several occasions with no luck picking up satellites or position. Antenna is on top of aircraft with no obstructions within four feet. ( I haven't gotten over to the compass rose yet for MAG CALIBRATION.)

  Thanks for your help!

 

[ned]

Calibration does not need completed for GPS to lock. Check that you do not have the Try reversing the TX/RX wires.

 

[Dynon]

Are you hooked up to serial port 5 as most people do (you're matching wire colors if you've done it that way). And if so, in the serial port setup, is serial port 5 set to SV-GPS-250? And if so, is the RX counter doing anything at all?

 

[Fly4fude]

Wires have been verified, Serial port 5 does show GPS-250, but there is no TX or RX data being received.

 

[Dynon]

One last thing. If you have multiple displays, are the wires going to both of them in parallel? If yes, get in touch with our technical support staff at 425-402-0433 or support at dynonavionics dot com and they can help you from here.

 

[bruceh]

I initially had a problem like this. I had the power/ground wires swapped :
Once I flipped those wires everything has been working fine.