TS-990S Service Manual
HF/50MHZ TRANSCEIVER
TS-990S
SERVICE MANUAL TEXT EDITION
JVC KENWOOD Corporation
© 2013-4 PRINTED IN JAPAN RQ004 (Y) 185 (B53-7036-00)
CONTENTS
DISASSEMBLY FOR REPAIR…………………………………………..3
CIRCUIT DESCRIPTION………………………………………………….4
COMPONENTS DESCRIPTION………………………………………40
SEMICONDUCTOR DATA………………………………………………60
PARTS LIST………………………………………………………………….75
EXPLODED VIEW………………………………………………………..150
PACKING……………………………………………………………………157
TROUBLE SHOOTING…………………………………………………158
ADJUSTMENT…………………………………………………………….160
TERMINAL FUNCTION………………………………………………..210
LEVEL DIAGRAM………………………………………………………..238
OPTIONAL ACCESSORIES
ARCP-990 (Radio Control Program)………………………….240
ARHP-990 (Radio Host Program)……………………………..240
SP-990 (External Speaker)……………………………………….240
SPECIFICATIONS………………………………………………………..242
Document Copyrights
Copyright 2013 by JVC KENWOOD Corporation. All rights 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 otherwise, for any purpose without the prior written permission of
JVC KENWOOD Corporation.
Disclaimer
While every precaution has been taken in the preparation of this manual, JVC KENWOOD Corporation assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein. JVC KENWOOD Corporation reserves the right to make changes to any products herein at any time for improvement purposes.
Safety Check after Repairs
Perform the insulation resistance test for the security of the product, after repairs.
■ Point to be checked
Check that the power supply plug does not have poor contacts and that there is no garbage or conductive materials stuck between the terminals. If the power supply cord is damaged, do not repair it using tape; replace it with the specified part.
■ Safety study
After repairs have been completed, remove the power supply cord from the outlet, the antenna, the outside connection cable, etc., and insert the power switch. Using a 500V DC insulation resistance meter, check the insulation between each terminal of the attachment plug and the antenna terminal and other outside metal parts, and ensure that the insulation resistance levels are more than 4MΩ. When the insulation resistance level is lower than this value, check repair of the transceiver is required.