ViewSonic Va703b3 Service Manual

 
 
ViewSonic VA703b-3  VA703m-3 
Model No. VS11359 
17” Color TFT LCD  Display 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(VA703b-3_VA703m-3_SM Rev. 1C Dec. 2006) 
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583 
Service Manual  

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ViewSonic Corporation
  Confidential - Do Not Copy  VA703b-3_VA703m-3 
Copyright 
Copyright © 2007 by ViewSonic Corporation.    All  rights reserved.    No part of this publication 
may be reproduced, transmitted, tran scribed, 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 ot herwise, without the prior written permission of ViewSonic 
Corporation. 
 
Disclaimer...

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ViewSonic Corporation
  Confidential - Do Not Copy  VA703b-3_VA703m-3 
TABLE OF CONTENTS 
 
 
1.  Precautions and Safety Notices    1
2. Specification   4
3.  Front Panel Function Control Description  10
4. Circuit Description  15
5. Adjustment Procedure  24
6.  Troubleshooting Flow Chart  37
7.  Recommended Spare Parts List 45
8. Exploded Diagram and Exploded Parts List  49
9. Block Diagram  54
10. Schematic Diagrams 55
11.  PCB Layout Diagrams 62
 
  

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ViewSonic Corporation
  Confidential - Do Not Copy  VA703b-3_VA703m-3 
1. Precautions and Safety Notices 
 
1. SAFETY PRECAUTIONS 
This monitor is manufactured and tested on a ground principl e that a user’s safety comes first. However, improper 
used or installation may cause damage to  the monitor as well as to the user. 
 
WARNINGS: 
z   This monitor should be operated only at the correct power  sources indicated on the label on the rear of the monitor. If 
you’re unsure of the power supply in...

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ViewSonic Corporation
  Confidential - Do Not Copy  VA703b-3_VA703m-3 
4. Handling and Placing Methods 
 
Correct Methods: Incorrect Methods: 
Only touch the metal of th e LCD panel or the front 
cover of he monitor. Do  not touch the surface of the 
polarizer.  Surface of the LCD panel is pressed by fingers and 
that may cause Mura. 
  
  
Take out the monitor with cushions. 
Taking out the monitor by grasping the LCD panel. 
That may cause Mura. 
  
  

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ViewSonic Corporation
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Correct Methods: Incorrect Methods: 
Place the monitor on a clean and soft foam pad.  Placing the monitor on fo
reign objects, That could 
scratch the surface of the  panel or cause Mura. 
  
The panel is placed facedown on the lap. That may 
cause Mura. 
 
  

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ViewSonic Corporation
  Confidential - Do Not Copy  VA703b-3_VA703m-3 
2. Specification 
PRODUCT DEFINITION AND SPECIFICATION 
Product Name  VA703b-3 / VA703m-3 
Model Number  VS11359 
Region M model for America 
E model for Europe 
G model for China 
P model for Asia 
A model for Australia 
S model for Singapore 
K model for Korea 
U model for UK 
OSD Languages 
English, French, German, Italian, Spanish,  
Finnish, Japanese, Traditional Chinese, 
Simplified Chinese 
TFT LCD Panel and Model # 
INN,...

 
ViewSonic Corporation
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4 
1 GENERAL specification 
Test Resolution & Frequency  1280 x 1024 @ 60Hz 
Test Image Size  Full Size 
Contrast and Brightness Controls  Factory Default:   
Contrast = 70%, Brightness = 100% 
 
2 VIDEO INTERFACE
 
Analog Input Connector  DB-15 (Analog), refer the appendix A 
Default Input Connector  Defaults to the first detected input 
Video Cable Strain Relief  Equal to twice the weight of the monitor for five 
minutes 
Video...

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ViewSonic Corporation
  Confidential - Do Not Copy  VA703b-3_VA703m-3 
 
5 ELECTRICAL REQUIREMENT 
 
 
Horizontal / Vertical Frequency 
Horizontal Frequency  30 – 82 KHZ  
Vertical Refresh Rate  50 – 85 HZ. 
Maximum Pixel Clock 
135 MHz 
Sync Polarity  Independent of sync polarity. 
 
Timing Table 
Item Timing  Analog 
1  640 x 350 @ 70Hz, 31.5kHz 
Yes 
2  640 x 400 @ 70Hz 
Yes 
3  640 x 480 @ 50Hz Yes 
4  640 x 480 @ 60Hz, 31.5kHz 
Yes 
5  640 x 480 @ 67Hz, 35.0kHz 
Yes 
6  640 x 480 @ 72Hz,...

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ViewSonic Corporation
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6  FRONT PANEL CONTROLS AND INDICATORS 
Front Panel Hardware Controls 
Power Switch (Front Head)  Power Control, soft Power Switch. 
Power LED (Front Head)  Green – ON 
Orange – Active Off 
Dark = Soft Power Switch OFF 
Front Panel Controls (Head) 
[ 1 ] [ 2 ] [
] [
▲ ] [▼ ]  [ 1 ] BUTTON 1   
[ 2 ] Button 2 
[
] Power 
[ ▲ ] UP ARROW BUTTON 
[ ▼ ] DOWN ARROW BUTTON 
 
Note: Power Button, Button 1 and Button 2 must be 
one-shot...