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Now downloading free:ViewSonic Q19wb-3 VS11578

ViewSonic Q19wb-3 VS11578 free download

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File name:ViewSonic Q19wb-3 VS11578 pow. Delta EADP-45AF BF.rar
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File name ViewSonic Q19wb-3 VS11578 pow. Delta EADP-45AF BF.pdf

Service Manual ViewSonic Q19wb-3 Model No. VS11578 19" Color TFT LCD Display (Q19wb-3_SM Rev. 1a Oct. 2006) ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583 Copyright Copyright 2006 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the prior written permission of ViewSonic Corporation. Disclaimer ViewSonic makes no representations or warranties, either expressed or implied, with respect to the contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from time to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or changes. Trademarks Optiquest is a registered trademark of ViewSonic Corporation. ViewSonic is a registered trademark of ViewSonic Corporation. All other trademarks used within this document are the property of their respective owners. Revision History Revision 1a SM Editing Date 10/31/2006 ECR Number Description of Changes Initial Release Editor Jamie Chang ViewSonic Corporation i Confidential - Do Not Copy Q19wb-3 TABLE OF CONTENTS 1. 2. 3. 4. 5. 6. 7. 8. 9. Precautions and Safety Notices Specification Front Panel Function Control Description Circuit Description Adjustment Procedure Troubleshooting Flow Chart Recommended Spare Parts List Exploded Diagram and Exploded Parts List Block Diagram 1 4 10 12 20 42 46 48 52 53 61 10. Schematic Diagrams 11. PCB Layout Diagrams ViewSonic Corporation ii Confidential - Do Not Copy Q19wb-3 1. Precautions and Safety Notices 1. 1. Precaution & Safety Notice Caution : No modification of any circuit should be attempted . Service work should only be performed after you are thoroughly familiar with all of the following safety checks and servicing guide line 2. Safety Check : Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit. These voltage are exposed in such areas as the associated transformer circuits . 3. POWER SUPPLY REQUIREMENTS The external power converter for this display utilizes AC and DC cords , AC cord is detachable , but DC cord is permanently attached . Any attempt to replace another adapter could result in serious problem on the display . 4. LEAKAGE CURRENT HOT CHECK 4-1 Plug the AC cord directly into the AC outlet. Do not use an isolation transformer during this check. 4-2 Connect a 1500 ohm , 10 watt resistor , paralleled by a 0.15uF capacitor between each metallic part and a good earth ground 4-3 Use an AC voltmeter with 1000 ohm / volt or more sensitivity and measure the AC voltage across the combination 1500 ohm resisto



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