Spectra Logic TAC/COM SERIES - Manual (Page 28)

Tac/Com Control Head Manual SM06 Rev. 4.10
2.4
Post Installation Checks
Before the unit is permanently mounted, perform the following functional tests and make
any needed adjustments and switch or jumper settings. Ensure that the unit is securely
mounted before any flight is attempted.
2.4.1
Voltage/Resistance Checks
DO NOT ATTACH THE TAC/COM CONTROL HEAD UNTIL THE FOLLOWING
CONDITIONS ARE MET.
With the Tac/Com control head disconnected from all of its mating connectors, make
the following measurements on the system connector P100 mating plug (25-pin)
whether it comes from an FC41 adapter cable or from the basic airframe wiring:
a) Check pins <1> and <2> for +28 Vdc relative to ground.
b) Check pins <13>, <14> and <15> for continuity to ground (below 0.5 ohms).
c) Check pin <3> (28 Vdc), pin <4> (14 Vdc) or pin <5> (5 Vdc) for proper lamp
dimmer voltage.
d) Check pin <16>, <17> or <18> for continuity to ground as above (lamp return).
If the control head uses only the RT9600/7200 plug-compatible interface card, it is
permissible to not use the system connector, and instead use the existing wiring from
the C-962/722. In that case, make the following checks on the C-962/722 25-pin audio
connector:
a) Check pin <19> for +28 Vdc relative to ground.
b) Check pins <10>, <12> and <20> for continuity to ground (below 0.5 ohms). Pin
<12> should be a separate wire to ground.
c) Check pin <16> (28 Vdc), pin <15> (14 Vdc) or pin <17> (5 Vdc) for proper lamp
dimmer voltage.
2.4.2
Power On Checks
WARNING:
High volume settings can cause hearing damage.
Set the headset volume control to the minimum volume
setting prior to conducting this test and slowly increase the
headset volume level to a comfortable listening level.
Power up the aircraft's systems with the Tac/Com control head and RT's installed, and
turn ON all of the radios and other accessories required for this system.
Page 2-4 Jan 4, 2006
ENG-FORM: 805-0108.DOT
CONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.