ViewSonic Va703m4 Service Manual

 
 
ViewSonic VA703b-4  VA703m-4 
Model No. VS11366 
17” Color TFT LCD  Display 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(VA703b-4_VA703m-4_SM Rev. 1b Oct. 2006) 
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583 
Service Manual  

ViewSonic Corporation i Confidential - Do Not Copy   VA703b-4_VA703m-4 
Copyright 
Copyright © 2006 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 
ViewSonic...

ViewSonic Corporation ii Confidential - Do Not Copy   VA703b-4_VA703m-4 
TABLE OF CONTENTS 
 
 
1.  Precautions and Safety Notices    1
2. Specification   4
3.  Front Panel Function Control Description  14
4. Circuit Description  18
5. Adjustment Procedure  25
6.  Troubleshooting Flow Chart 48
7.  Recommended Spare Parts List 56
8. Exploded Diagram and Exploded Parts List  65
9. Block Diagram  71
10. Schematic Diagrams 72
11.  PCB Layout Diagrams 78
 
  

ViewSonic Corporation 1  Confidential - Do Not Copy   VA703b-4_VA703m-4 
1. Precautions and Safety Notices 
 
 
1.   Please carefully read this  manual before operating the device and keep it available for future reference. 
2.   To avoid the danger of the monitor falling and thereby possibly causing injury and/or    serious damage to the 
monitor itself, do not place it on unstable cars or desks. Be careful to avoid placing any stress on the LCD screen 
during handling. 
3.   Do not place this monitor...

ViewSonic Corporation 2  Confidential - Do Not Copy   VA703b-4_VA703m-4 
Handing and Placing methods  
Correct methods Incorrect methods 
Only touch the metal frame of the LCD panel or 
the front cover of the monitor, DO not touch the 
surface of the POL 
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” 
   

ViewSonic Corporation 3  Confidential - Do Not Copy   VA703b-4_VA703m-4 
 
Place the monitor on a clean and soft foam pad Placing the monitor on a foreign objects, that could    scratch 
The surface of the Panel or cause mura 
 
 The panel is placed facedown th e lap,that may cause mura
 
 
  

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2. Specification 
INTRODUCTION 
FEATURES VA703b-4 / VA703m-4 
Size 17 “  
Luminance (Typ) 280 cd/¢T 
Contrast Ratio (Typ) 600 :1 
Colors  16.2 M colors (6+2bit panel)  
Response Time (Typ) 8 ms 
Viewing Angle (H/V) 150 ° / 135° 
  1st TFT LCD panel 
INNOLUX MT170EN01 
V7 
Recommend resolution 1280 x 1024 @60Hz 
Size 17 “  
Luminance (Typ) 300 cd/¢T 
Contrast Ratio (Typ) 600 :1 
Colors  16.2 M colors (6+2bit panel)  
Response Time...

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PRODUCT DEFINITION AND SPECIFICATION 
Product Name VA703b-4 / VA703m-4 
Model Number VS11366 
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 # 1st TFT LCD panel INNOLUX...

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

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2-3 POWER SUPPLY 
Internal Power Supply  Part Number:PI-SB03/XXXXXXX  
Input Voltage Range 100 to 240VA C  
Input Frequency Range 50 to 60 Hertz 
Short Circuit Protection OUTPUT CAN BE SHORTED WITHOUT DAMAGE 
Over Current Protection 6 A T Y P I C A L AT 5 VDC 
Leakage Current 1.0 MA (MAX) AT 264VAC / 60HZ 
Efficiency 80 % TYPICAL AT 115VAC FULL LOAD 
Fuse  INTERNAL AND NOT USER REPLACEABLE 
Power Dissipation 32 WATTS (TYP) 
Max...