Garmin GTN 650 Cockpit Reference Guide - Page 46

Message GPS RECEIVERGPS receiver has failed. Check GPS coax for electrical short. GPS RECEIVERLow internal clock battery. GPS RECEIVERGPS receiver needs service. GPS SEARCHING SKYEnsure GPS antenna has an unobstructed view of the sky. GTNGTN needs service. INTERNAL SD CARD ERRORGTN needs service. Description Action Internal communication to the GPS module is inoperative. Use a different GPS receiver or a non-GPS based source of navigation. Contact dealer for service. The GPS module indicates that its clock battery is low. The unit will function normally, but may take a longer than normal period to acquire a GPS position. Contact dealer for service. The GPS module is Use a different GPS receiver reporting that it needs or a non-GPS based source service. The GPS module of navigation. Contact may continue to dealer for service. function. The GPS module is acquiring position and may take longer than normal. This message normally occurs after initial installation or if the unit has not been powered for several weeks. No action is necessary; message is informational only. The GTN has lost calibration data that was set by Garmin during manufacturing. Contact dealer for service. Internal SD card has an Contact dealer for service. error. This card is not accessible by the user. Messages 40 GTN 625/635/650 Cockpit Reference Guide (CRG) 190-01004-04 Rev. C