Ingeniero

Service Manual
ViewSonic VG800b
Model No. VLCDS23896-5W 18” Color TFT LCD Display

VG800b-1_SM_606 - Rev. 1a – Oct 2002)

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

Copyright 2002 by ViewSonic Corporation. All rights reserved. No part of this publication may be Copyright reproduced, transmitted, transcribed, stored in a retrieval system, or translatedinto 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 orfitness 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 ViewSonic is a registered trademark of ViewSonic Corporation. All other trademarks used within this document are the property of their respectiveowners.

Revision History
Revision 1a Date 10/22/02 Description Of Changes Initial Release DCN-2660 Approval C.Shen

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VG800b

TABLE OF CONTENTS

. 1. PRECAUTIONS AND NOTICES..............................................................................1 .

2. SPECIFICATIONS..................................................................................................2-32 3. CIRCUIT DESCRIPTIONS....................................................................................33-49 4. ADJUSTMENT........................................................................................................50-54 5. MECHANICAL ASSEMBLY..................................................................................55-59 6. SPAREPARTS LISTS.......................................................................................60-78
7. 8. SCHEMATIC DIAGRAMS.......................................................................................80-88 PCB DRAWING...................................................................................................89-90

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Confidential – Do Not CopyVG800b

1. PRECAUTIONS AND NOTICES

Prior to using this manual, please ensure that you have carefully followed all the procedures outlined in the user manual for this product. Read all of these instructions. Save these instructions for later use. Follow all warnings and instructions marked on the product. Do not use this product near water. This display should be installed on a solidhorizontal base. When cleaning, use only a neutral detergent cleaner with a soft damp cloth. Do not spray with liquid or aerosol cleaners. Do not expose this display to direct sunlight or heat. Hot air may cause damage to the cabinet and other parts. Adequate ventilation must be maintained to ensure reliable and continued operation and to protect the display from overheating. Do not block ventilationslots and openings with objects or install the display in a place where ventilation may be hindered. Do not install this display near a motor or transformer where strong magnetism is generated. Images on the display will become distorted and the color irregular. Do not allow metal pieces or objects of any kind fall into the display from ventilation holes. Slots and openings in the cabinet and theback or bottom are provided for ventilation, to ensure reliable operation of the product and to protect it from overheating, those openings must not be blocked or covered. The openings should never be blocked by placing the product on a bed, sofa, rug, or other similar surface. This product should never be placed near or over a radiator or heat register. This product should not be placed in a...