J1001
POWER & GROUND
MAIN CDI/HSI
(GPS/VOR/ILS)
SWITCHES/
ANNUNCIATORS
EXTERNAL MAP
DISPLAY
CDI/HSI
(VOR/ILS ONLY)
KING SERIAL
TUNED DME
PARALLEL TUNED
DME
ARINC 429
EFIS/EHSI
RMI
AUDIO PANEL
FLIGHT CONTROL
SYSTEM
FUEL/AIR DATA
OR
SERIALIZER
GARMIN
GTN 6XX/7XX
(CROSSFILL)
LIGHTING BUS
TIME MARK OUT
ETHERNET IN
ETHERNET OUT
RS-232 IN
ARINC 429 IN
ARINC 429 OUT
ILS/GPS APPROACH
LAT DEVIATION & FLAGS
TO/FROM
VERT DEVIATION & FLAGS
SUPERFLAGS
MAIN OBS
SWITCHES
ANNUNCIATORS
RS-232 OUT
EXTERNAL INSTRUMENTATION
AIRCRAFT POWER & GROUND
AIRCRAFT LIGHTING BUS
J1002
COM MIC KEY
COM MIC AUDIO
J1003
(GTN 750 only)
J1004
(GTN 750 only)
COM MIC AUDIO
COM REMOTE TRANSFER
COM REMOTE TRANSFER SWITCH
COM REMOTE TUNE UP
COM REMOTE TUNE
SWITCHES
COM REMOTE TUNE DOWN
MICROPHONE
COM AUDIO
VLOC AUDIO
POWER & GROUND
AIRCRAFT POWER & GROUND
VOR OBI
NAV ARINC 429 IN
NAV ARINC 429 OUT
POWER & GROUND
AIRCRAFT POWER & GROUND
PARALLEL DME TUNING
NAV DME COMMON
NAV REMOTE TRANSFER
NAV REMOTE TRANSFER SWITCH
LAT DEVIATION & FLAGS
TO/FROM
VERT DEVIATION & FLAGS
SUPERFLAGS
VOR OBS
VLOC COMPOSITE OUT
NAV ILS ENERGIZE
SERIAL DME CLOCK/DATA
DME REQUEST COMMON
OTHER GARMIN LRUs
ETHERNET IN
ETHERNET OUT
TRAFFIC
ARINC 429 IN
DISCRETES
STORMSCOPE
RS-232 IN
RS-232 OUT
TRANSPONDER
RS-232 IN
RS-232 OUT
ANALOG AUDIO
RS-232 IN
RS-232 OUT
J1005
(GTN 750 ONLY)
RS-232 IN/OUT
ARINC 429 IN/OUT
SYNCRO
J1006
GPS/SBAS ANTENNA
J1007
(GTN 750 ONLY)
COM ANTENNA
J1008
(GTN 750 ONLY)
NAV ANTENNA
190-01007-01
GTN 725/750 Maintenance Manual
Rev. 5
Page 2-3
Figure 2-3 GTN 725/750 Block Diagram
