How to troubleshoot Garmin GPS GNC 255 when it does not power on?
If your Garmin GPS GNC 255 does not power on, it could be due to a lack of power. Check the power connections, breakers, and the main avionics switch. Alternatively, a faulty electrical wiring or connection could be the cause. In this case, contact your dealer to perform an electrical system test.
What to do if Garmin GPS GNC 255 does not transmit?
If your Garmin GPS GNC 255 does not transmit, it could be due to a lack of power to Com. Check the power connections. Another potential cause is the Mic key connection. Check the Mic key input connection.
Why isn’t the intercom functioning on my Garmin GPS?
If the intercom on your Garmin GPS isn’t functioning, it might be disabled via a remote mounted switch or through the menu. Check the connections. If there's no voice activation, or you must speak too loudly, check the ICS page for Intercom On/Off settings and adjust the intercom settings.
How to fix Garmin GPS when can’t change active frequency?
If you can't change the active frequency on your Garmin GPS, the Com Radio may not be communicating, or the radio may be in lockout mode (tuned to 121.50). If in Lock Out mode, press the external Com FLIP/FLOP key for two seconds to return to normal operation or cycle the avionics power. If the condition persists, contact dealer.
What does it mean when Garmin GPS OBS readout displays “---”?
If the OBS readout on your Garmin GPS displays “---”, it could be due to a resolver failure. In this case, contact dealer. Another possible cause is a calibration error. Recalibrate the resolver.
General| Channels | 760 |
|---|---|
| Frequency Range | 118.000 to 136.975 MHz |
| Channel Spacing | 25 kHz |
| Input Voltage | 11 to 33 VDC |
| Dimensions | 159 x 50 x 193 mm |
Detailed performance parameters for COM, VOR, LOC, Glideslope functions.
Step-by-step guide for rack, unit, and antenna installation.
Comprehensive pin functions for COM (P2001) and NAV (P2002) boards.
Accessing and setting unit parameters via configuration menus.
Procedures for verifying system functionality and performance.
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