Nat AA35-001 Operation Manual
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AA35-001 Audio Mixer PanelSM25 Installation and Operation ManualSection 2 Rev: 1.00 Issue 4 Page 2-2ENG-FORM: 805-0117.DOTCONFIDENTIAL AND PROPRIETARY TO NORTHERN AIRBORNE TECHNOLOGY LTD.2.4.2 CautionsCAUTION:Do not bundle any lines from this unit with transmitter coax feedlines. Do notbundle any logic, audio, or DC power lines from this unit with 400 Hz synchrowiring or AC power lines. Do not position this unit next to any device with astrong alternating magnetic field such as an inverter, motor or blower, orsignificant audio interference will result.In all installations, use shielded cable exactly as shown, and ground only asindicated. Significant problems may result from not following these guidelines.2.4.3 Cabling and WiringAll wire shall be selected in accordance with the original aircraft manufacturer's Maintenance Instructionsor AC43.13-1B Change 1, Paragraphs 11-76 through 11-78. Unshielded wire types shall qualify toMIL-W-22759 as specified in AC43.13-1B Change 1, Paragraphs 11-85, 11-86, and listed in Table 11-11.For shielded wire applications, use Tefzel MIL-C-27500 shielded wire with solder sleeves (for shieldterminations) to make the most compact and easily terminated interconnect. Follow the connector map inSection 2.7 as required.Allow 3" from the end of the shielded wiring to the shield termination to allow the connector hood to beeasily installed. Reference the interconnect drawing in Section 2.7 for shield termination details. Note thatthe hood is a "clamshell" hood, and is installed after the wiring is complete. Aircraft harnessing shallpermit the unit to be removed from the panel for easy access to all side adjustments. Do NOT mount theunit until all adjustments have been performed.Maintain wire segregation and route wiring in accordance with the original aircraft manufacturersMaintenance Instructions.Unless otherwise noted, all wiring shall be a minimum of 22 AWG, except power and ground lines, whichshall be a minimum of 20 AWG. Refer to the Interconnect drawing for additional specifications. Check thatthe ground connection is clean and well secured, and that it shares no path with any electrically noisyaircraft accessories such as blowers, turn and bank instruments or similar loads. Power to this unit mustbe supplied from a separate circuit breaker or fuse (fast blow), and not attached to any other circuitbreaker without additional protection. Verify that the selected circuit breaker size and wire gauge areadequate for the installation using the techniques specified in AC43.13-1B Change 1, Paragraphs 11-47through 11-51 and 11-66 through 11-69.2.4.4 Post Installation Checks2.4.4.1 Voltage/Resistance ChecksDo not attach the AA35-001 until the following conditions are met.Check the following:a) J1 pins <1> and <2> for +28 Vdc relative to ground.b) J1 pins <20> and <21> for continuity to ground (below 0.5Ω). |
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