Kenwood NX-720 Service Manual

Also see for NEXEDGE NX-720: Installation guide Instruction manual Technical details Service manual Instruction manual

Contents

NX-720(G)/7202INTRODUCTIONSCOPE OF THIS MANUALThis manual is intended for use by experienced techni-cians familiar with similar types of commercial grade com-mu ni ca tions equipment. It contains all required serviceinforma tion for the equipment and is current as of the pub-lication date. Changes which may occur after publicationare covered by either Service Bulletins or Manual Revisions.These are is sued 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, or chassis. If thepart number is not known, include the chassis or kit numberof which it is a part, and a sufficient description of the re-quired component for proper identifi cation.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-erup for safe operation.• This equipment should be serviced by only qualified tech-nicians.PRE-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 installation.Transmitter frequency, deviation, and power output should bechecked, as should receiver sensitivity, squelch operation,and audio output. Signalling equipment operation should beverifi ed.3. PLANNING THE INSTALLATION3-1. GeneralInspect the vehicle and determine how and where the ra-dio 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.GENERALFirmware CopyrightsThe title to and ownership of copyrights for firmwareembedded in KENWOOD product memories are reservedfor JVC KENWOOD Corporation. Any modifying, reverseengineering, copy, reproducing or disclosing on an Internetwebsite of the firmware is strictly prohibited without priorwritten consent of JVC KENWOOD Corporation. Further-more, any reselling, assigning or transferring of the firmwareis also strictly prohibited without embedding the firmware inKENWOOD product memories.Transceivers containing AMBE+2™ Vocoder:The AMBE+2™ voice coding technology is embedded inthe fi rmware under the license of Digital Voice Systems, Inc.Document CopyrightsCopyright 2012 by JVC KENWOOD Corporation. Allrights reserved.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 permission ofJVC KENWOOD Corporation.DisclaimerWhile every precaution has been taken in the preparationof this manual, JVC KENWOOD Corporation assumes noresponsibility for errors or omissions. Neither is any liabilityassumed for damages resulting from the use of the informa-tion contained herein. JVC KENWOOD Corporation reservesthe right to make changes to any products herein at any timefor improvement purposes.