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 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 
 
 
Revision History 
Revision  SM Editing Date  ECR Number  Description of Changes  Editor 
1a  7/24 /2006      Initial Release  J. Chang 
       
       
       
       
       
       
  Optiquest is a registered trademark of ViewSonic Corporation. 
ViewSonic is a registered trademar k of ViewSonic Corporation. 
All other trademarks used within this document ar e the property of their respective owners. 
 
1b  10/04/2006               Add COM / SVA panel source                                  \
 J. Chang  
						

							
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 in areas that  are wet or where water or other liquids may come in contact with it, such 
as bathrooms, kitchens, wet floors, near washing machines or by swimming pools. 
4.   Remove the power plug from the electrical socket before cl eaning. No water-containing cleaning agent should be 
used to clean the screen, but only cleaning agents formul ated specifically for cleaning LCD screens. Do not put 
any liquid cleaning agent directly on the screen, but put it on a soft cloth first and then gently apply the cloth to 
the screen. 
5.   In order to guarantee reliable operation and adequate heat dissipation, do not cover or block vent holes on the 
monitor. Do not put the monitor close to heat sources. Do not place the monitor on furniture such as a bookshelf, 
unless sufficient ventilation is available. 
6.   A 3-pin grounding plug is provided for this monitor. In orde r to guarantee normal operation and safety of this unit, 
this plug should be used with a matching grounded power socket. 
7.   Please follow all warnings and instru ctions that accompany the monitor. 
8.   Please pay special attention to power supply overloads, as electrical shock or fire may occur. 
9.   Do not place anything on the power cord. Do not hang the power cord over an area where people or objects may 
pass. 
10.  In case the monitor is not be used for an extended period, turn off power to avoid the possibility of short circuits 
caused by lightning.   
11.  In order to avoid electrical shock or fire risks, do not insert any object through any openings in the monitor’s 
enclosure. Do not allow any liquid to come in contact with the monitor. 
12.  In case of any abnormal noise or odor caused by incorr ect operation, turn off power immediately and contact a 
professional technician. Do not attempt to repair this monitor by yourself, as electrical shock may occur when 
opening the back cover or accessing internal components. 
13.  If any of the following conditions occurs, turn off power and contact a repair service provider:   
1)  the power cord is damaged or worn; 
2)   liquid has gotten into the monitor, or the monitor has experienced immersion or wetting; 
3)   the monitor has fallen; 
4)   the monitor’s performance shows obvious changes; 
5)   the monitor fails to work normally when correct proced ures are followed. In that case, please make any 
adjustments in accordance with instructions supplied with the monitor; do not attempt any changes to 
established procedures, as further damage may occur, making successful repair of the monitor more difficult.   
14.      In case parts need to be replaced, you must use identical parts or those supplied by our certified manufacturers.  Any other parts used without our authorization may result in electrical shock or fire risk.   
						

							
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
 
 
  
						

							
ViewSonic Corporation 4  Confidential - Do Not Copy   VA703b-4_VA703m-4 
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 (Typ) 8 ms 
Viewing Angle (H/V) 130 ° / 110° 
  2nd  TFT LCD panel 
SVA 170SX01TB 
Recommend resolution 1280 x 1024 @60Hz 
Size 17 “  
Luminance (Typ) 300 cd/¢T 
Contrast Ratio (Typ) 500 :1 
Colors  16.2 M colors (6+2bit panel)  
Response Time (Typ) 8 ms 
Viewing Angle (H/V) 150 ° / 130° 
3rd   TFT LCD panel 
CMO M170E5-L09 
Recommend resolution 1280 x 1024 @60Hz 
Analog (75ohms, 0.7/1.0 Vp-p) Yes   Input Signal Digital (DVI-D) No 
Separate Sync Yes   
Composite Sync No Sync Compatibility 
Sync on Green No 
PC Yes 
Power Mac Yes Compatibility 
TV Box (NextVision 6) Yes 
Power Voltage AC 100-240V, 50/60Hz Yes 
On Mode(Max / Typ) Under 36 W in max 
Power Consumption Active Off Mode (Max) Saving mode< 2W 
Off mode 
						

							
ViewSonic Corporation 5  Confidential - Do Not Copy   VA703b-4_VA703m-4 
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 MT170EN01 
TFT LCD Panel and Model # 2nd  TFT LCD panel SVA 170SX01TB 
TFT LCD Panel and Model # 3rd   TFT LCD panel CMO M170E5-L09 
Scalar Realtek, Model # : RTD2023L 
Input Signal Analog 
Sync Compatibility Separate  
 Audio 1 W @ 
						

							
ViewSonic Corporation 6  Confidential - Do Not Copy   VA703b-4_VA703m-4 
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 
Video Cable Connector DB-15 Pin out  Compliant DDC 2B 
Video Signals  1. Video RGB (Analog), Separate 
Video Impedance  75 Ohms (Analog) 
Maximum PC Video Signal  950 mV with no damage to monitor 
Maximum Mac Video Signal  1250 mV with no damage to monitor 
Sync Signals  LVDS 
DDC 2B  Compliant with Revision 1.3 
Sync Compatibility  Separate Sync 
Video Compatibility  Shall be compatible with all PC type computers, Macintosh 
computers, and after market    video cards 
Resolution Compatibility 640 x 350, 640 x 480, 720 x 400 (640 x 400), 800 x 600, 
832 x 624, 1024 x 768, 1152 x 864, 1280 x 1024 
Exclusions  Not compatible with interlaced video  
						

							
ViewSonic Corporation 7  Confidential - Do Not Copy   VA703b-4_VA703m-4 
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 Input AC Current 1.2 ARMS @ 90VAC, 0.8 ARMS  @180VAC 
Inrush Current (Cold Start) 30 A  @  90 VA C ,  60 A(MAX)  @ 264 VA C  
Power Supply Cold Start SHALL START AND FUNCTION PROPERLY WHEN 
UNDER FULL LOAD, WITH ALL COMBINATIONS OF 
INPUT VOLTAGE, INPUT FREQUENCY, AND 
OPERATING TEMPERATURE 
Power Supply Transient Immunity 
SHALL  BE ABLE TO WITHSTAND AN ANSI/IEEE 
C62.41-1980 6000V 200 AMPERE RING WAVE 
TRANSIENT TEST WITH NO DAMAGE 
Power Supply Line Surge Immunity 
Shall be able to withstand 1.5 times nominal line voltage 
for one cycle with no damage 
Power Supply Missing Cycle Immunity   Shall be able to function prope
rly, without reset or visible 
screen artifacts, when ½ cycle of AC power is randomly 
missing at nominal input 
Power Supply Acoustics  The power supply shall not produce audible noise that 
would be detectable by the us
er.    Audible shall define to 
be in compliance with  ISO 7779 (DIN EN27779:1991) 
Noise measurements of machines acoustics. Power Switch 
noise shall not be considered 
US Type Power Cable    Length = 1.8m. Connects to AC/DC Power Color = Black 
Power Saving Operation(Met hod) VESA DPMS Signaling 
Power Consumption    On Mode