Appendix A: Maintenance and Troubleshooting
SkyView System Installation Guide - Revision AA 21-9
External Light Control Signal Output
SkyView displays are compatible with external light control signals. The state of the external
light control signal is shown here.
Brightness Level Output
SkyView displays can output a brightness level signal to control the brightness of compatible
external equipment screens. The level of the output is shown here.
Contact Input Status
Each SkyView display has four contact inputs. The status of each contact input is shown here as
either HIGH or LOW. CONTACT INPUT 1 is implemented as EXTERNAL LEVEL button. CONTACT
INPUT 2 is implemented as EXTERNAL GO AROUND button. CONTACT INPUT 3 and CONTACT
INPUT 4 have not been implemented.
Serial Port Status and Current Baud Rate
Each SkyView display has five general purpose serial ports. The status of each serial port is
shown with transmit (TX) and receive (RX) character counters and the ports current baud rate.
The character counters show any outgoing or incoming character and roll over at 9999.
Button and Joystick States
The state of each button is shown on the BUTTON STATE line. You will see 1 2 3 4 5 6 7 8 on the
line. When you press a button, its respective number on the button state line is replaced with
an asterisk (*). For example, if you press and hold button 3, you will see 1 2 * 4 5 6 7 8.
The state of each joystick is shown on the JOYSTICK STATE line. Each joystick is denoted with an
L or R (left or right, respectively), a counter to show joystick turns, and the letters UDLRC to
denote moving the joystick Up, Down, Left, Right, and Center (when pressed like a button).
Operational Hours
This is a running count of the hours a screen has been on since was initially manufactured.
Instructions for Continued Airworthiness
Follow these steps for continued airworthiness:
Conduct any periodic checks that are mandated by local regulations (IE, FAA for US Aircraft),
such as (but not limited to):
o Transponder test
o Pitot / Static system test - refer to “Performing Pitot/Static Checks” near the end of
the SV-ADAHRS-200/201 Installation and Configuration section.
Annually test the SV-BAT-320 Backup Battery.
Annually perform a ZERO PRESSURE IAS/AOA CALIBRATION
SV-COM-C25/X83, SV-COM-XPNDR-261/262, SV-ADSB-470 (if installed) – inspect antennas
and coaxial cables for wear, continued correct installation, etc. See those sections for more
detail.
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