Tac/Com Control Head Manual

SM06 Rev. 4.10

2.4Post 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.

2.4.1Voltage/Resistance ChecksDO 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.

2.4.2Power On ChecksWARNING: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

 

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