To Next PageTo Next PageHow to resolve Garmin airport database integrity error?
If your 400W Series unit displays an “ database integrity error” message, it means the unit has detected a problem with a database on the NavData card, rendering the data unusable. Try reloading the information onto the card. If the problem persists, replace the card.
What does Garmin configuration error - Config service req’d mean?
If you see a “Configuration error - Config service req’d” message, it indicates that the configuration information has been lost or corrupted. Reconfigure the unit.
Why Garmin 400W Series GPS unit does not compute a position?
If your 400W Series unit isn't computing a position, there could be a few reasons: * Not receiving signals: Check the GPS antenna connections and ensure the aircraft is clear of obstructions like hangars, buildings, and trees. * Unit cycling: Wait 20 minutes for the unit to complete its cycle.
Why has the COM transmitter power been reduced on my Garmin 430W?
If the COM transmitter power has been reduced, it's likely due to the unit detecting excessive temperature. The COM transceiver transmit power has been automatically reduced to compensate for this condition. Check for adequate ventilation or check cooling airflow. Also, insufficient voltage level can be a factor; check the input voltage.
Why am I getting a 'Loss of integrity - cross-check NAV' warning on my Garmin 400W GPS?
A 'Loss of integrity' warning can occur due to several reasons. Check the GPS antenna installation, connections, and cable routing, ensuring the GPS antenna is mounted on the top of the aircraft. Also, ensure the aircraft is clear of hangars, buildings, trees, etc., as these can shade the antenna from satellites. Finally, RF interference at 1575.42 MHz from VHF COM can cause this issue; move the GPS antenna further from the COM antenna, add a 1575.42 MHz notch filter in COM coax, fix or replace the COM, and disconnect the ELT antenna coax to check for possible re-radiation.
Why is my Garmin 400W Series unit not receiving heading from the compass system?
If the 400W Series unit isn't receiving heading from the compass system (ARINC 429 heading input used), the ARINC 429 input port speed may not be correct. Check the ARINC 429 input port speed setting for the port that the device is connected to and verify that the speed is correct for that device. Also, incorrect wiring connections could be the cause; check the wiring.
Why won’t my Garmin 400W OBS resolver calibrate?
If the OBS resolver won’t calibrate, it could be due to an incompatible resolver or an improper connection. Check the resolver specifications and wiring.
How to improve low GPS signal levels on my Garmin?
Very low GPS signal levels can be caused by a few things. First, check the GPS antenna installation, connections, and cable routing, ensuring the antenna is mounted on top of the aircraft. Also, make sure the aircraft is clear of hangars, buildings, trees, etc., which could be shading the antenna from satellites. Finally, RF interference at 1575.42 MHz from VHF COM can be a factor; try moving the GPS antenna further from the COM antenna, adding a 1575.42 MHz notch filter in the COM coax, fixing or replacing the COM, or disconnecting the ELT antenna coax to check for possible re-radiation.
Why do Garmin GPS signal levels drop when avionics are turned on?
If the GPS signal levels drop when avionics are turned on, it's likely due to noise interference from other avionics. To resolve this, turn off all avionics, then turn them on one at a time to identify the source of the interference. Route the GPS cable and position the GPS antenna away from these interference sources.
What to do if my Garmin GPS 400W Series unit does not compute a position?
If your Garmin GPS 400W Series unit isn't computing a position, it could be due to not receiving signals. Check the GPS antenna connections and ensure the aircraft is clear of obstructions like hangars, buildings, or trees. Alternatively, the unit may need to complete its cycle, so wait 20 minutes.
General| Interface | RS-232 |
|---|---|
| Receiver Type | WAAS-enabled |
| Display | Color LCD |
| Database | Jeppesen |
| Interfaces | RS-232 |
| Certifications | TSO-C146a |
Provides an overview of the 400W Series units, including display and data card information.
Lists physical and general specifications for the 400W Series units.
Details the performance specifications for the GPS receiver.
Outlines the technical specifications for the COM transceiver functions.
Details the performance specifications for the VOR receiver.
Details the performance specifications for the LOC receiver.
Details the performance specifications for the Glideslope receiver.
Lists approved antennas and their operational limitations.
Details TSO authorizations and advisory circular references.
Outlines the required items for VFR and IFR installations.
Discusses mounting location considerations for various antennas.
Details pilot view centerline and acceptable field-of-view for annunciations.
Guidelines for installing wiring harnesses and ensuring system separation.
Provides instructions for rack installation and unit insertion/removal.
Information on GPS antenna cable installation and connector assembly.
Details pin functions for the P4001 Main Connector.
Describes the function and electrical characteristics of the main indicator.
Guides through accessing and operating configuration pages.
Configures GPS ARINC 429 output and input ports.
Allows changing selectable RS-232 inputs/outputs to match installed equipment.
Allows configuration of Fuel, Terrain, and Discretes options.
Verifies CDI outputs, LAT/VERT, and calibrates the OBS input.
Procedures for verifying system functions in configuration mode.
Procedures for verifying system functions in normal operating mode.
Verifies GPS signal acquisition and reception.
Checks for interference between COM and other aircraft avionics.
Verifies proper communication with interfaced systems.
Describes flight tests to verify system operation and performance.
Verifies GPS position and flight plan data during maneuvering.
Tests VHF COM transceiver performance with a ground station.
Verifies VOR reception, audio quality, and navigation flags.
Verifies ILS reception, audio quality, and navigation flags.
Tests autopilot coupling with GPS and NAV modes.
Provides a guide to diagnosing and resolving installation issues.
Lists common alerts, their possible causes, and solutions.
Details limitations for GPS/WAAS operation under Instrument Flight Rules.
