Garmin GMA 35 Installation Manual

190-00585-11 GMA 35/35c Installation ManualRev. H Page A-1APPENDIX A INSTALLATION CONSIDERATIONS FOR UPGRADINGFROM A GARMIN GMA 340NOTEThis appendix contains installation considerations for upgrading from a GarminGMA 340. This is not a set of comprehensive installation instructions for installing aGarmin GMA 35 in place of a Garmin GMA 340. Read this manual in its entirety beforestarting any installation.A.1 Mechanical Considerations• The GMA 340 installation rack is not compatible with the GMA 35. Refer to Section 2 of thismanual for a list of installation materials.• The GMA 340 backplate and connectors are compatible and may be reused, however theGMA 340 backplate will need to be oriented to accommodate the GMA 35. Refer to Appendix Band C of this manual for proper backplate orientation.A.2 Electrical ConsiderationsBelow is a list of GMA 340 pins that may need to be modified to accommodate the GMA 35. Refer toSection 4 and Appendix C of this manual for a list of pin functions and interconnect examples.• GMA 340 J1 pins 23 through 28 (Com Spkr Loads) – COM speaker loads connected to these pinsshould be removed before installing the GMA 35. If the connected radios require speaker loads,the use of external load resistors is recommended.Below is a list of GMA 340 pins that are marked as RESERVED on the GMA 35.• GMA 340 J2 pin 6 (14V Lgt/28V Lgt Lo) – This pin is marked as RESERVED on the GMA 35.No wiring change is required.• GMA 340 J2 pin 21 (Swap Return) – This pin is marked as RESERVED on the GMA 35. Nowiring change is required.