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Installation and Operation Manual
®
BENDIX/KING BENDIX/KING BENDIX/KING BENDIX/KING
KMA 28
FAA-Approved TSO C50c, C35d
JAA-Approved JTSO-2C35d, C50c
Audio Amplifier /Intercom/
Marker Beacon Receiver
Document P/N 006-10565-0000
REVISION 0, SEPTEMBER 2000
WARNING
Prior to export of this document, review for export license requirement is needed.
Honeywell International, Inc. 2000©
Copyright Notice
Reproduction of this publication, or any portion thereof, by any means without the express written pe
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver Table of Contents 1 SECTION I GENERAL INFORMATION ......................................................................... 1-1 1.1 INTRODUCTION...........................................................................................................1-1 1.2 SCOPE .............................................................................................................................1-1 1.3 EQUIPMENT DESCRIPTION ...........
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 2.11.1 OPERATIONAL CHECKOUT......................................................................................2-10 2.11.2 RECEIVER SENSITIVITY...........................................................................................2-11 2.12 CELLULAR INTERFACE CHECKOUT ...........................................................................2-11 2.13 FINAL INSPECTION...........................................................
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver Section I GENERAL INFORMATION 1.1 INTRODUCTION The KMA 28 represents the next step in cockpit audio control and intercommunications. Using proprietary IntelliVox® design, this unit eliminates the requirements for intercom squelch adjustments. The unit is designed for outstanding ergonomics and visually de- fined mode annunciation and selection. Before installing and/or using this product, please read this manual completely. This w
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver A six-station voice activated (VOX) intercom is included in the KMA 28. This system has the advanced IntelliVox® circuitry that eliminates manual adjustments. The system contains six separate VOX mic circuits, and only opens the microphone channel in use. The intercom system incorporates pilot isolate and crew modes, two stereo (or mono de- pending on unit) music inputs with "Soft Mute," and LED indicators for swap and trans- mit
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 1.5 SPECIFICATIONS TSO COMPLIANCE Marker Beacon: C35d, Class A Audio Selector/Intercom: C50c, Class A APPLICABLE DOCUMENTS: RTCA/DO-214 RTCA/DO-143 RTCA/DO-160C RTCA/DO-178B ENVIRONMENTAL Qualifications: A1D1/CA(MN)XXXXXXBBBBTBKXX Temperature Range: Operating: -15º C to +55ºC Storage: -55º C to +85ºC Altitude: Up to 50,000 feet in an non-pressurized area of the cockpit. DIMENSIONS: Height: 1.3 in. (3.3 cm) Width: 6.25 in. (1
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver Intercom Specifications Intercom Positions: 6 places (with individual IntelliVOX® circuits) Music Inputs: 2 (Stereo) Music Muting: >-30 dB "Soft Mute" when Com or intercom active. Distortion: <1% THD @ 38 mW into 150Ω <10% THD @ 70mW into 150 Ω Mic Freq. Response, 3 dB: 300 Hz - 6000 Hz Music Freq. Response, 3 dB: 100 Hz - 18kHz MARKER BEACON RECEIVER Frequency: 75 MHz Crystal Controlled Capable of: Sensitivity: 1000 µ Volts (Hard
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 1.7 EQUIPMENT REQUIRED BUT NOT SUPPLIED a) Circuit Breaker: 1 ea. 3 amp b) Speaker, 4 Ω c) Headphone Jacks (Stereo, as Required) d) Microphone Jacks (as Required) e) Headphones, 150 Ω (Stereo), up to 6 as required f) Microphones, up to 6 as required g) Marker Antenna (75 MHz, VSWR <1:1.5, 50 ohm, and cable (RG400 R/U) h) Interconnect Wiring 1.8 LICENSE REQUIREMENTS None 006-10565-0000 Page 1-5 Rev. 0, Sept. 2000
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver Section II - Installation 2.1 GENERAL INFORMATION 2.1.1 SCOPE This section provides detailed installation and interconnect instructions for the Honey- well, Inc. KMA28 Audio Selector Panel/Intercom System with internal Marker Beacon. Please read this manual carefully before beginning any installation to prevent damage and post-installation problems. Installation of this equipment requires special tools and knowledge. 2.1.2 Certifi
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 2.3.3 Mounting Rack Installation Set the unit aside in a safe location until needed. Install the tray using six FHP 6-32 x ½" screws. The audio selector panel must be supported at front and rear of the mounting tray. 2.3.4 Connector Assembly The unit connectors mate directly with the circuit boards in the KMA 28. The connectors are a Molex crimp-type, and require the use of a Molex hand crimp tool, EDP P/N 11-01- 0203, CR6115B (o
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver that you use insulated washers to isolate the ground return path from the airframe to all headphone and microphone jacks. 2.4.2 Existing KMA-24 Installation If the installation replaces a KMA-24 (series 00, -01, -02 or -03), the existing 44 pin connector can be used for the bottom connector of the KMA 28 tray as is, providing it is properly installed and wired. No other changes are required except for external marker lights (see
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 2.4.7 "Swap" Mode When a momentary, normally open, push-button switch is connected between pin 10 on the top connector and aircraft ground, the user can switch between Com 1 and 2 by de- pressing this switch without having to turn the mic selector switch. This yoke-mounted switch eliminates the need to remove your hands from the yoke to change transceivers. 2.4.8 Backlighting The KMA 28 has an automatic dimming of the pushbutton a
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver in the entertainment devices into the system. The audio signal at the entertainment input must be a minimum of 500 mV P-P per channel for optimum music performance. All entertainment devices must be switched off for both takeoff and landing. 2.4.10.1.2 Entertainment distribution Entertainment source #1 provides music for the pilot and copilot positions, while enter- tainment source #2 provides music for the four passenger position
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver pilots PTT is activated, his voice is heard over the speaker. The copilot can continue to use the selected com. We recommend installing a toggle switch to connect the cabin speaker output (pin W, bottom connector) to a rear or public address speaker instead of the cockpit speaker close to the pilot. This will prevent feedback. 2.4.13 PA Mute (J1, Pin 18) Pin 18 of J1 is a TTL logic output that is pulled low during PTT operation.
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 2.6 Adjustments The KMA 28 is factory adjusted to accommodate the typical requirements for most air- craft configurations. There are five adjustments however, that will allow the installer to tailor the specific functions. Marker Gain CW- Reduce MKR Low Sense CW Decrease Sens. Passenger Volume CCW Increases KMA28 adjustment holes Not used Speaker Volume CW-Increase Marker Audio CW Decrease Volume Figure 2-1- KMA 28 Adjustments 2.7
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver connected to pin W of the J3 connector. On the AirCell interface diagram these are listed as data/fax lines, but they are used for voice interface in this case. Use a 2-conductor with shield cable, and connect the shield to Pin M of the J3. If interface is desired with another type of wireless telecommunications unit, the aircraft owner can purchase an after-market interface cable. By Federal Communications Com- mission (FCC) regu
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 2.9 KMA 28 Pin Assignments J2 Top Connector J1 Bottom Connector Pilot Phone Audio Hi (Left) Chassis Ground 1 1 MKR Coax Lo AUX Control Out A A Copilot Phone Audio (Lt) MM Sense Output 2 2 Copilot Phone Audio Lo MKR Antenna B B Copilot Phone Audio (Rt) Pilot Headphones 3 3 White Lamp Output C C Pass 1 Mic Audio Hi Amber Lamp Out 4 4 Pass 1 Mic Audio Lo 14 V Light Hi D D Pass 2 Mic Audio Hi Blue Lamp Out 5 5 Pass 2 Mic Audio Lo Li
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 2.10 Post Installation Checkout After wiring is complete, verify power is ONLY on pin 20 of the J1 (bottom connector), and airframe ground on bottom connector pin Z. Failure to do so will cause serious inter- nal damage and void the warranty. 2.11 Unit Installation To install the KMA 28, gently slide the unit into the mounting rack until the hold-down screw is engaged. While applying gentle pressure to the face of the unit, tight
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver 15. Verify that the audio selector panel system does not adversely affect any other aircraft system by systematically switching the unit on and off, while monitoring the other avionics and electrical equipment on the aircraft. 2.11.1.1 Marker Checkout 1. Connect a ramp generator at the antenna end of the marker coax. With the unit under test in HI sensitivity, verify that a 160 µ V, modulated 95% with 1300 Hz, signal will illumina
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Bendix/King KMA28 Audio Amplifier/Intercom/Marker Beacon Receiver Section III KMA28 OPERATION GENERAL INFORMATION KMA28 controls 3.1 Audio Selector Receiver audio is selected through two momentary and six latched, push-button, backlit switches. Com 1 and Com 2 are the momentary switches. Because the rotary microphone selector switch controls what transceiver is being heard, the Com l and Com 2 push-buttons are of the momentary type and do not remain in when selected. This is also part of the "au
