dodsond
New Member
- Joined
- Aug 9, 2006
- Messages
- 76
I have been progressing well with my avionics installation. I have a D-100, HS-34 and D-120. The HS-34 and D-100 harnesses were provided by Approach Fast Stack. My D-120 harness came from Steinair.
3 weeks ago I connected the HS-34 harness to power, ground and the Approach hub. The EFIS provides only serial altitude and DSAB to the hub. The HS-34 interfaces with the hub for audio, DSAB, ARINC, RS232 and marker beacon.
When powered (no EFIS yet) , there were no lights on the HS-34 but a loud static hiss came over the audio until I disconnected the primary connector. I didn't think much about this since I had not yet connected the airframe ground for the audio panel and the D-100 was not powered yet.
Yesterday, I installed the harness for the D-100. I applied power and the EFIS and D-120 booted fine. There were no lights on the HS-34. I also could not get the DSAB to recognize the D-120, the remote compass, or the HS-34. I again disconnected the HS-34 primary connector, and now the DSAB will find the compass and D-120. This was repeatable.
So then, I made a temporary harness for the HS-34 with only 4 pins: power on pin 4, ground on pin 17, DSAB A & B on 3 & 16. I directly connected the DSAB wires to the second pair of DSAB wires in the D-120 harness that came from Steinair. I ran the power and ground right to my busses. Still no lights from the HS-34 and the DSAB would fail on the D-100 and D-120. I tried a DSAB configuration, and the EFIS would find nothing.
Is my HS-34 broken or am I missing something? I have never seen a single indication on the HS-34. The hiss is gone too, but I figured that was because I finished the audio panel grounds.
Doug Dodson
Glasair II-S FT
3 weeks ago I connected the HS-34 harness to power, ground and the Approach hub. The EFIS provides only serial altitude and DSAB to the hub. The HS-34 interfaces with the hub for audio, DSAB, ARINC, RS232 and marker beacon.
When powered (no EFIS yet) , there were no lights on the HS-34 but a loud static hiss came over the audio until I disconnected the primary connector. I didn't think much about this since I had not yet connected the airframe ground for the audio panel and the D-100 was not powered yet.
Yesterday, I installed the harness for the D-100. I applied power and the EFIS and D-120 booted fine. There were no lights on the HS-34. I also could not get the DSAB to recognize the D-120, the remote compass, or the HS-34. I again disconnected the HS-34 primary connector, and now the DSAB will find the compass and D-120. This was repeatable.
So then, I made a temporary harness for the HS-34 with only 4 pins: power on pin 4, ground on pin 17, DSAB A & B on 3 & 16. I directly connected the DSAB wires to the second pair of DSAB wires in the D-120 harness that came from Steinair. I ran the power and ground right to my busses. Still no lights from the HS-34 and the DSAB would fail on the D-100 and D-120. I tried a DSAB configuration, and the EFIS would find nothing.
Is my HS-34 broken or am I missing something? I have never seen a single indication on the HS-34. The hiss is gone too, but I figured that was because I finished the audio panel grounds.
Doug Dodson
Glasair II-S FT