Continued Airworthiness; Diagnostics Information; Figure 3-14 Diagnostics Mode - Garmin GMA 245 Installation Manual

3.7.9 Speaker Check
1. If a speaker was installed, select SPKR and receive COM audio on the selected COM. When the
speaker is selected, the selected Recievers on the GMA (COM, NAV, AUX ) should be heard from
the speaker.
CAUTION
Be sure to check all aircraft control movements before flight is attempted to ensure that the
wiring harness does not touch any moving part.
This completes the in-aircraft post installation checkout. Perform a flight test after installing the unit to
ensure satisfactory performance of the audio functions.

3.8 Continued Airworthiness

Other than for regulatory checks, maintenance of the GMA 245/245R is "on condition" only. Periodic
maintenance of the GMA 245/245R is not required. Instructions for Continued Airworthiness (ICA) are
not required for this product under 14 CFR Part 21 since the GMA 245/245R has received no FAA
approval or endorsement.

3.9 Diagnostics Information

The GMA 245 is capable of displaying diagnostics information while in normal mode of operation. To
show the diagnostics information press the PLAY button for five seconds. While still holding the PLAY
button, all button annunciators will turn off except for those associated with certain diagnostic states. All
button annunciators are off if no diagnostic information is available. The image below depicts which
button annunciators are associated with which diagnostic states.
• A Headset Short indication means that the unit has detected the associated headset wire is shorted
to ground or to another headset channel. No headset short should be detected if the headset jack is
wired for a stereo jack, and the headset is a stereo headset. A headset short may be detected for a
mono headset.
• A Hardware Fault indication means the unit has detected an internal unrecoverable fault. Contact
Garmin Aviation Customer support for assistance.
• A Software Load Fault indication means the previous software update didn't complete
successfully. Retry loading software from the loader card to resolve this fault.
190-01879-11
Rev. 6

Figure 3-14 Diagnostics Mode

GMA 245/245R Installation Manual
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