190-01879-11 GMA 245/245R Installation ManualRev. 6 Page 3-213.7.9 Speaker Check1. If a speaker was installed, select SPKR and receive COM audio on the selected COM. When thespeaker is selected, the selected Recievers on the GMA (COM, NAV, AUX ) should be heard fromthe speaker.CAUTIONBe sure to check all aircraft control movements before flight is attempted to ensure that thewiring harness does not touch any moving part.This completes the in-aircraft post installation checkout. Perform a flight test after installing the unit toensure satisfactory performance of the audio functions.3.8 Continued AirworthinessOther than for regulatory checks, maintenance of the GMA 245/245R is "on condition" only. Periodicmaintenance of the GMA 245/245R is not required. Instructions for Continued Airworthiness (ICA) arenot required for this product under 14 CFR Part 21 since the GMA 245/245R has received no FAAapproval or endorsement.3.9 Diagnostics InformationThe GMA 245 is capable of displaying diagnostics information while in normal mode of operation. Toshow the diagnostics information press the PLAY button for five seconds. While still holding the PLAYbutton, all button annunciators will turn off except for those associated with certain diagnostic states. Allbutton annunciators are off if no diagnostic information is available. The image below depicts whichbutton annunciators are associated with which diagnostic states.Figure 3-14 Diagnostics Mode• A Headset Short indication means that the unit has detected the associated headset wire is shortedto ground or to another headset channel. No headset short should be detected if the headset jack iswired for a stereo jack, and the headset is a stereo headset. A headset short may be detected for amono headset.• A Hardware Fault indication means the unit has detected an internal unrecoverable fault. ContactGarmin Aviation Customer support for assistance.• A Software Load Fault indication means the previous software update didn’t completesuccessfully. Retry loading software from the loader card to resolve this fault.
