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Service Manual
ViewSonic VE710s/b-21
VA721
Model No. VS10047
17" Color TFT LCD Display
(VE710s/b-2_VA721_SM_770_1b Rev.1b Nov. 2004)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright 2004 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
Documents Number
Revision SM Editing Date Description of Changes Editor
DCN Number ECR Number
1a 03/11/04 3765 Initial Release A. Lu
Change Scaler from MST P/N: 2365929896
1b 11/02/04 4778 4716 To RealTek 2023 P/N: 2365930896 A. Lu
ViewSonic Corporation Confidential - Do Not Copy VE710s/b-2
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TABLE OF CONTENTS
1. Precautions and Safety Notices 1
2. Specification 2
3. Front Panel Function Control Description 4
4. Circuit Description 10
5. Adjusting Procedure 16
6. Trouble Shooting Flow Chart 30
7. Recommended Spare Parts List 32
8. Exploded Diagram And Spare Parts List 49
9. Block Diagram 52
10. Schematic Diagrams 53
11. PCB Layout Diagrams 59
ViewSonic Corporation Confidential - Do Not Copy VE710s/b-2
ii VA721
1. Precautions and Safety Notices
1.1. SAFETY PRECAUTIONS
This monitor is manufactured and tested on a ground principle that a user's safety comes first. However, improper
use or installation may cause damage to the monitor as well as to the user. Carefully go over the following
WARNINGS before installing and keep this guide handy.
WARNINGS:
.This monitor should be operated only at the correct power sources indicated on the label on the rear end of the
monitor. If you're unsure of the power supply in your residence, consult your local dealer or power company.