Today I checked the continuity of the servo
wiring. I referenced the wiring
schematic and determined where the wires went from the servos to the AV5000
control module. Because I started
building the airplane before the SkyView system was available the original
wiring was for the D180. When I ordered
the avionics the SkyView was the only system available. I had to install the conversion wiring
harnesses to make the system work correctly.
That means the wires go through the harnesses and are divided up before
they reach the control module.
I traced
the wires to both the “Options” and “Autopilot” Sub-D connectors. I removed the connectors from the control
module.
I also removed the seat
inspection panel and using my muli-meter
began checking continuity. I checked the harness and found continuity to
the Sub-D connectors except for the black/white and orange wires. Because the roll servo is wired through the
pitch servo I checked continuity on these wires from the pitch servo to the
roll servo. There was continuity on both. Again I checked and confirmed there was no
continuity on these wires from the Sub-D connector to the pitch servo. The drawings show the orange wire terminating
at pin 4 in the connector and the black/white wire terminating at pin 3. By checking the pins I discovered the pins are
reversed. The black/white wire
terminates and pin 4 and the orange wire terminates at pin 3. I checked the continuity through these
circuits. They are good. I have emailed Vans and Dynon to see if I should
leave these pins as they are or switch them.
It seems to me that because there is continuity in all of the wires, I
am getting 12.+ V in the red wire (power) and because the pitch servo functions
properly the roll servo must be
bad. I hope to hear from Dynon soon.
