90-60 C813 Transceiver Installation (Optional)
A. Description
The Technisonic TDFM-600/6000/7000 series (C813-2; 5-band) and TDFM-9000
series (C813-4 and C813-5; 6-band) airborne transceivers are wired through the
Technisonic A711L series audio control panel to allow for separate and simultaneous
operation on each band. The C813-2 transceiver (earlier Police helicopters) is located
at the observer’s station. The C813-4 and C813-5 transceivers (separate installations)
are located in the instrument panel for pilot and observer access.
B. Schematic
Refer to Figure 90-4 for C813-2 transceiver installation wiring schematic.
Refer to Figure 90-5 for C813-4 transceiver installation wiring schematic.
Refer to Figure 90-6 for C813-5 transceiver installation wiring schematic.
C. Removal
C813-2 (Technisonic TDFM-600) Transceiver:
1. Refer to Figure 90-1. Turn battery & avionics switches off and pull out (7.5 amp)
circuit breaker at panel.
2. Remove screws securing D413-2 cover to D413-1 box assembly.
3. Disconnect D613-4 harness assembly from C813-2 transceiver.
4. Release slotted turnlock fasteners securing transceiver to box assembly and
remove transceiver.
C813-4 (Technisonic TDFM-9000) Transceiver:
1. Refer to Figure 90-1. Turn battery & avionics switches off and pull out (10 amp)
circuit breaker at panel.
2. Release slotted turnlock fasteners securing C813-4 transceiver to avionics tray
and remove transceiver.
C813-5 (Technisonic TDFM-9000) Transceiver:
1. Refer to Figure 90-1. Turn battery & avionics switches off and pull out (10 amp)
circuit breaker at panel.
2. Remove screws securing G413-14 cover to G070 console assembly and remove
cover.
3. Disconnect G458-1 harness assembly and antenna cables from C813-5 transciever.
4. Release slotted turnlock fasteners and remove transceiver.
Page 90.6 Chapter 90 Police Version JUL 2020
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