NX-3002Document CopyrightsCopyright 2008 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.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 the pub-lication date. Changes which may occur after publicationare covered by either Service Bulletins or Manual Revisions.These 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, 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 identification.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.NXDN Transceivers:The AMBE+2(TM) voice coding technology is embeddedin the firmware under the license of Digital Voice Systems,Inc.PERSONAL SAFETYThe following precautions are recommended for personalsafety:• DO NOT transmit until all RF connectors are verified se-cure and any open connectors are properly terminated.• SHUT OFF and DO NOT operate this equipment nearelectrical blasting caps or in an explosive atmosphere.• This equipment should be serviced by a qualified techni-cian only.SERVICEThis transceiver is designed for easy servicing. Refer tothe schematic diagrams, printed circuit board views, andalignment procedures contained within.GENERALService Manual ListTitle Parts number Remarks Market code Control unit number TX-RX unit numberNX-300 B51-8811-00 First edition K,K3 X53-4260-XX(J79-0131-19)X57-7370-10(J79-0128-19)NX-300 B51-8811-10 RevisedThis service manual K,K2,K3,K4 X53-4260-XX(J79-0131-29)X57-7370-XX(J79-0128-39)Note: Refer to page 10 for compatibility information of the Control unit and TX-RX unit.