ST290 GPS and NMEA issues

[smorast]

Steve,

Thanks again for the rapid feedback.

I was able to confirm the wiring via physical means/continuity checks. Updated block diagram (see attached) shows the ST1 to STng converter is also spliced into the ST2 network. Also confirmed the S3 course computer is connected to two sources of power. Second slide of the attached includes photos of these confirmation, as well as DPU being connections.

Confirming you recommend disconnecting +12V from S3 course computer and what do you recommend for DPU? How would I test for correct operation, post disconnection.

Also, where would you suggest adding a ST1-STng Converter and how what would be connected to it?

Any other issues of note you see as other potential problem areas?

V/R,
smorast