What to do if unable to control Com using COM bezel key on Garmin Apollo CNX80 GPS?
If you're unable to control the COM using the COM bezel key on your Garmin GPS, it could be due to no power to the com or the input voltage being too low. Ensure that power is connected to the com 15-pin connector P4-1 and ground to P4-9. Also, increase the input supply voltage to above 10 volts DC.
Why Garmin Apollo CNX80 GPS heading differs greatly from compass system (synchro hdg only)?
If the Garmin GPS (CNX80) heading differs greatly from the compass system (synchro hdg only), it could be because the Synchro X,Y,Z legs are crossed, the 26VAC reference Hi and Lo are swapped, or the 26VAC reference supplied to the CNX80 is different from the 26VAC reference used by the compass system. Check the wiring, and verify that the CNX80 and compass system are using the same 26VAC reference.
What to do if unable to control Nav using VOR bezel key on Garmin Apollo CNX80?
If you are unable to control the Nav using the VOR bezel key on your Garmin GPS, it is likely due to no power to the nav receiver. To resolve this, ensure that power is connected to the nav 37-pin connector P7-1 and ground to P7-2.
Why Garmin Apollo CNX80 is not receiving baro-correction setting from altimeter?
If your Garmin GPS (CNX80) is not receiving the baro-correction setting from the altimeter, it could be due to a few reasons: the CNX80 baro pot input might not be configured correctly or calibrated, or the CNX80 might not be the only device tied to the altimeter baro pot. To resolve this, check the baro pot configuration in Ground Maintenance Mode, calibrate the baro pot, and ensure that the CNX80 is the only device connected to the altimeter baro pot.
Describes the installation and checkout procedures for the Apollo CNX80 Color GPS/Nav/Com.
Details the Apollo CNX80 Color GPS/Nav/Com unit, its features, and system interfaces.
Provides detailed electrical, physical, environmental, and performance specifications for the Apollo CNX80.
Outlines TSO, advisory circular references, FCC grant, and STC authorization.
Explains how to update the CNX80 database using a Compact Flash Memory datacard.
Provides essential information and practices to follow before starting the installation process.
Outlines the general steps and considerations for a successful installation.
Lists materials and supplies required for installation that are not included with the CNX80.
Details specific tools necessary for making reliable crimp contact connections for D-sub connectors.
Covers important factors affecting installation, including system configuration and mounting.
Describes the process of mounting the CNX80 unit in the avionics stack, including tube installation.
Details the electrical connections and interface connector definitions for the CNX80 unit.
Explains the functionality of various outputs, inputs, and interfaces of the CNX80 unit.
Provides instructions for installing the Comm, GPS, and Nav antennas for optimal performance.
Details the procedure for completing an electrical load analysis prior to aircraft installation.
Verifies that all cables are securely connected and shields are properly installed.
Guides the installer through configuring the CNX80 for the specific installation.
Provides utilities for checking the display, controls, and I/O of the CNX80 unit.
Details the procedures for verifying CNX80 operation and GPS navigation on the ground.
Describes how to check the functionality of the VHF Navigation receiver.
Provides steps to verify the performance of the VHF Communication transceiver.
Verifies proper communication between the CNX80 and interfaced systems.
Outlines flight tests to verify system functions not adequately testable on the ground.
Ensures the installed database is current and verifies its expiration status.
Provides a guide to identify and resolve common problems encountered with the CNX80.
Provides contact information for Garmin AT Technical Support for assistance.
Details operational limitations, TSO authorizations, and system safety assessment guidance.
Covers installation requirements, compatibility, and limitations for aircraft integration.
States that interfaces beyond those shown are outside the manual's scope and may require further approval.
States that no scheduled servicing tasks or internal manual adjustments are required.
Requires VOR accuracy checks for IFR flight every 30 days per CFR 14 paragraph 91.171.
Details the internal battery lifespan and replacement procedure for the CNX80.
Presents the environmental test conditions and results for the Apollo CNX80 per RTCA/DO-160D.
Details the available RS-232 serial input configurations supported by the CNX80.
Describes input formats for fuel/air data computers, including Shadin 'S' and 'Z' formats.
Lists available RS-232 serial output configurations supported by the CNX80.
Lists compatible altitude sources that meet serial or ARINC 429 specifications.
Lists compatible autopilots that meet Nav mode and analog deviation data specifications.
Lists suitable indicators and switches for CDI/HSI source selection annunciation.
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