GP 32 replaced by GP 39 / Connection with NKE Gyrographic

[Giovanni]

Hello, I had a GP32 well connected with the NMEA 183 of a very old NKE Gyrographic: connections were White and Blue of GP32 with Yellow and Green of Gyrographic.
I have now purchased a new GP39, and connections are unchanged, according to the connections schemes, but the NMEA 183 channels are not created after reinitialization of NMEA on the Gyrographic.

• The oldest NMEA version 1.5 is selected on GP39, together with the option "Rem1"
• Waypoint is set on GP39 before reinitialization of the nmea
• Data are correctly sent out from GP39 to VHF DSC
• Data are not displayed on the NKE Gyrographic

Is there any compatibility problem due to RS422 standard opf GP39? (was the GP32 base on RS232?)
Is there any compatibility problem due to an update of the NMEA 1.5 sentences done by Furuno on GP39?
Is there any compatibility problem due to some update of the GP39 software / CPU?
Thanks!

 

[TheReaper]

You are correct that the RS422 output is still White (TD+) and Blue (TD-)
GP39 is RS422 only
Try NMEA v2.0 and/or REM2 or GPS to see if it makes a difference
It's always best to update to the latest version of software before spending a lot of time troubleshooting. Please ensure you have the latest version for the GP39. Here's a link to the page with the software on it: https://furunousa.com/en/support/GP39