Kenwood NX-800H Service Manual

Also see for NEXEDGE NX-800H: Function reference Instruction manual Instruction manual Specifications Service manual

Contents

NX-800H2Document CopyrightsCopyright 2009 by Kenwood Corporation. All rights re-served.No part of this manual may be reproduced, translated,distributed, or transmitted in any form or by any means,electronic, mechanical, photocopying, recording, or other-wise, for any purpose without the prior written permissionof Kenwood.DisclaimerWhile every precaution has been taken in the preparationof this manual, Kenwood assumes no responsibility for er-rors or omissions. Neither is any liability assumed for dam-ages resulting from the use of the information containedherein. Kenwood reserves the right to make changes to anyproducts herein at any time for improvement purposes.Firmware CopyrightsThe title to and ownership of copyrights for firmwareembedded in Kenwood product memories are reserved forKenwood Corporation. Any modifying, reverse engineer-ing, copy, reproducing or disclosing on an Internet websiteof the firmware is strictly prohibited without prior writtenconsent of Kenwood Corporation. Furthermore, any resell-ing, assigning or transferring of the firmware is also strictlyprohibited without embedding the firmware in Kenwoodproduct memories.Transceivers containing AMBE+2™ Vocoder:The AMBE+2™ voice coding technology is embedded inthe firmware under the license of Digital Voice Systems, Inc.INTRODUCTIONSCOPE OF THIS MANUALThis manual is intended for use by experienced techni-cians familiar with similar types of commercial grade com-munications equipment. It contains all required serviceinformation for the equipment and is current as of this pub-lication date. Changes which may occur after publicationare covered by either Service Bulletins or Manual Revisions,which are issued as required.ORDERING REPLACEMENT PARTSWhen ordering replacement parts or equipment informa-tion, the full part identification number should be included.This applies to all parts: components, kits, and chassis. Ifthe part number is not known, include the chassis or kitnumber of which it is a part and a sufficient description ofthe required component for proper identification.PERSONAL SAFETYThe following precautions are recommended for personalsafety :• DO NOT transmit if someone is within two feet (0.6 me-ter) of the antenna.• DO NOT transmit until all RF connectors are secure andany open connectors are properly terminated.• SHUT OFF this equipment when near electrical blastingcaps or while in an explosive atmosphere.• All equipment should be properly grounded before pow-er-up for safe operation.• This equipment should be serviced by only qualifiedtechnicians.GENERALPRE-INSTALLATION CONSIDERATIONS1. UNPACKINGUnpack the radio from its shipping container and checkfor accessory items. If any item is missing, please contactKENWOOD immediately.2. PRE-INSTALLATION CHECKOUT2-1. IntroductionEach radio is adjusted and tested before shipment. How-ever, it is recommended that receiver and transmitter opera-tion be checked for proper operation before installation.2-2. TestingThe radio should be tested complete with all cabling andaccessories as they will be connected in the final installa-tion. Transmitter frequency, deviation, and power outputshould be checked, as should receiver sensitivity, squelchoperation, and audio output. Signaling equipment operationshould be verified.3. PLANNING THE INSTALLATION3-1. GeneralInspect the vehicle and determine how and where theradio antenna and accessories will be mounted.Plan cable runs for protection against pinching or crush-ing wiring, and radio installation to prevent overheating.3-2. AntennaThe favored location for an antenna is in the center of alarge, flat conductive area, usually at the roof center. Thetrunk lid is preferred, bond the trunk lid and vehicle chassisusing ground straps to ensure the lid is at chassis ground.