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OK, I pulled the harness out of the airplane and verified that it is wired as in your diagram. I verified identity and continuity pin-to-pin for each of the 8 ARINC lines. I also verified shielding. I verified that the HS34 and the 430W are configured according to Dynon's documentation, as...

David, Thanks for posting this. I had to go back through my build-up notes to check. They indicate that I did in deed make all eight connections, not just the four outlined in my first post. So by that, it is not the problem. But since I have you, does your installation work the way I think is...

I have 2 D10As, DSAB, HS34 connected to a 430W with the ARINC connections (HS34 pins 23, 11, 25, 13 into GNS430W pins 46, 47, 48, 49). The 430W is sending good CDI indications to the D10A, but the OBS indication from the HS34 is not getting back to the 430W. The "Instrument Panel Self-Test"...

Per Dynon Technical Support, I'm sending the unit in on an RMA. -D

I purchased two D10As, S/Ns 7899 and 7900, in April of this year (2020). They have been on the bench as I build up other parts of my system. They have been powered up numerous times (as recently as yesterday) and have worked correctly each time, displaying all expected data from the various...

Brian, Re-reading my message, I see that it implies that Dynon did not respond to me and I got impatient. To clarify, they did respond by phone to my earlier phone message and I wanted to forum to know what their answer to my question was. Thanks, Dave

Reply from Dynon: nope.

I have 2 nav radios feeding 2 D10As through an HS34. I can select NAV 1 to display CDI on both D10As, or I can select NAV 2 to display on both D10As. Can I display NAV 1 on one D10A and NAV 2 on the other D10A, both through the HS34?

Thank you. I had success doing it as you say. -d

Is it just me or are the "A"s and "B"s mixed up here? EFIS-D10A Installation Guide revision J from August 2010 page 6-5: =============================================== AP74 ELECTRICAL INSTALLATION When installing the AP74, we recommend building enough slack wiring into the D25 connector to...