ViewSonic Va1916w2 Service Manual

							 
 
ViewSonic VA1916w 
Model No.  VS11755 
19” Color TFT LCD Display 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(Manufacture date: Dec. 2008) 
 Service Manual  
						

							 1 Copyright 
Copyright © 2008 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. 
 
Product disposal at end of product life 
The lamp in this product contains mercury. Please dispose of in accordance with local, state or federal laws. 
 
Revision History 
Revision SM Editing Date ECR Number Description of Changes Editor  Initial Release T96MRYDBIWVSNNN T96MRYDDIWVWNND T96MRYDDIWVWNND A01 Dec 9, 08  
T96MRYDDIWVWNNN        
						

							 2 TABLE OF CONTENTS 
 
1. Precautions and Safety Notices..........................................................................................3 
2. Specification .......................................................................................................................5 
3. Front Panel Function Control Description .......................................................................7 
4. Circuit Description.............................................................................................................14 
5. Adjusting Procedure..........................................................................................................15 
6. Trouble Shooting Flow Chart............................................................................................22 
7. Block Diagrams .................................................................................................................23 
8. Schematic Diagrams ........................................................................................................25 
9. PCB Layout Diagrams ......................................................................................................32 
10. Exploded Diagram and Spare Parts List.........................................................................39 
11. Recommended Spare Parts List ....................................................................................44 
12. Different parts list ...........................................................................................................70 
						

							 3 1. Precautions and Safety Notices  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 the user. Carefully go over the following WARNINGS 
before installing and keep this guide handy. 
  
1.2  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 you local dealer or power company. ．Use only the special power adapter that comes with this monitor for power input.    Do not try to repair the monitor your self as it contains no user-serviceable parts. This monitor should only be repaired 
by a qualified technician.    Do not remove the monitor cabinet. There is high-voltage parts inside that may cause electric shock to human bodies, 
even when the power cord is unplugged.    Stop using the monitor if the cabinet is damaged. Have it checked by a service technician.    Put your monitor only in a clean, dry environment. If it gets wet, unplug the power cableimmediately and consult your 
service technician.    Always unplug the monitor before cleaning it .Clean the cabinet with a clean, dry cloth. Apply non-ammonia based 
cleaner onto the cloth, not directly onto the glass screen.    Keep the monitor away from magnetic objects, motors, TV sets, and transformer.    Do not place heavy objects on the monitor or power cord.  1.3 Product safety notice 
Many electrical and mechanical parts in this chassis have special safety visual inspections and the protection afforded 
by them cannot necessarily be obtained by using replacement components rated for higher voltages, wattage, etc. 
Before replacing any of these components read the parts list in this manual carefully. The use of substitute 
replacement parts which do not have the same safety characteristics as specified in the parts list may create shock, 
fire ,or other hazards.  1.4 Service notes 
When replacing parts or circuit boards, clamp the lead wires around terminals before soldering. 
When replacing a high wattage resistor(more than 1W of metal oxide film resistor) in circuit board, keep the resistor 
about 5mm away from circuit board. 
Keep wires away from high voltage, high temperature components and sharp edges. 
Keep wires in their original position so as to reduce interference. 
Usage of this product please refer to also user’s manual. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
						

							 4 Correct Methods  Incorrect Methods  Only touch the metal-frame of the panel or the 
front cover of the monitor. 
Do not touch the surface of the polarizer. Surface of the panel is pressed by fingers and that 
may cause “ MURA “  
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
 
 
 Take out the monitor from carton. Take out the monitor by grasping the LCD panel. 
That may cause “ MURA“.  
 
 
 
 
 
 
 
  Place the monitor on a clean & soft foam pad . Place the monitor on foreign objects and 
that could scratch the surface of panel.  
 
 
 
 
 
 
 
    
						

							 5 2. Specification 2.1 Product specifications 
Product Name VA1916w Oracle P/N VA1916W-10  Model Number VS11755 OSD Languages: 11  English, French, German, Italian, Spanish, 
Finnish, Japanese, Russian Simplified Chinese, 
Traditional Chinese, Korean TFT LCD Panel and Model # 1st
 panel: CMO A190A2 Scalar RTD 2554VH Input Signal Analog x1  Sync Compatibility Separate Sync  Adapter Internal Power Board Power Cable Yes, 
refer to APPENDIX B: Power Cable Analog Cable (1.8 m, black), with PC 2001 and Hot Plug Detect &DDC Yes  
(Detached cable; refer the Appendix A) DVI-D Cable(1.8m, black) with PC 2001 NO Audio Cable(1.8m, black) with PC 2001 NO MIC Cable(1.8m, black) with PC 2001 No USB Cable (V2.0) No ViewSonic CD Wizard Arabic, English, Finnish, Spanish, German, 
Italian, Japanese, Swedish, Polish, Korean, 
Portuguese, Russian, Turkish, French, Czech, 
Hungarian, Simplified Chinese, Traditional 
Chinese. Greek, Dutch, Bulgarian, Croatian, 
Romanian, Serbian, Slovak, Slovenian ViewSonic  Quick Start Guide One Page Perfect Suite CD 
No Screen Protector Mylar 
Yes Foot Protector plastic 
No Base assembly Procedure Card 
Yes Energy start sticker 
Yes Vista Install Card  
Yes DCR Sticker 
Yes Service Insert 
For Region code = M units only Warranty Card For Region code = G units only Carton Sticker For Region code = G units only PE bag of Carton NO Manufacture address sticker For Region code = G units only  
 
 
 
 
 
 
 
  
						

							 6 2.2 Interface description 15
6
10
1115
 
Video Connector Pin Assignment 
 
A -1.15 pin D-sub connector pin assignment 
Pin Number Pin Function 1 Red video input 2 Green video input 3 Blue video input 4 No Connection 5 Ground 6 Red video ground 7 Green video ground 8 Blue video ground 9 +5V 10 H/V sync ground 11 No connection 12 (SDA) 13 Horizontal sync (Composite sync) 14 Vertical sync 15 (SCL)  
  
						

							 7 3. Front Panel Function Control Description Use the buttons on the front control panel to display and adjust the OSD controls which display 
on the screen. The OSD controls are explained at the top of the next page and are defined in 
“Main Menu Controls” 
 
 
 
Main Menu 
with OSD controls 
 
 
 
 
Front Control Panel 
shown below in detail 
 
 
 
 
 
 
 
 
Displays the control screen 
for the highlighted control. 
Also toggles between two 
controls on some screens. 
Also a shortcut to Auto 
Image Adjust. 
 
 
 
 
 
 
Displays the 
Main Menu or 
exits the 
control screen 
and saves 
adjustments. 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
 
 
 
 
 
Power light 
Blue = ON 
Orange = Power Saving 
Standby Power  
On/Off 
 
 
 
Scrolls through 
menu options and  
adjusts the 
displayed control. 
Also a shortcut to 
display the 
Contrast 
adjustment control 
screen.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
						

							 8  
Do the following to adjust the display setting: 
1. To display the Main Menu, press button [1]. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
NOTE: All OSD menus and adjustment screens disappear automatically after about 15 
seconds. This is adjustable through the OSD timeout setting in the setup menu. 
2. To select a control to adjust, pressorto scroll up or down in the Main Menu.    
3. After the desired control is selected, press button [2]. A control screen like the one shown 
below appears. 
The line at the bottom of the screen shows 
the current functions of buttons 1 and 2: 
Exit or select the Brightness control. 
 
 
 
 
4. To adjust the control, press the up  or down  buttons.   
5. To save the adjustments and exit the menu, press button [1] twice. 
 
The following tips may help you optimize your display: 
• Adjust the computers graphics card so that it outputs a 1440 x 900 @ 60Hz video signal to 
the LCD display. (Look for instructions on “changing the refresh rate” in the graphics cards 
user guide.) 
• If necessary, make small adjustments using H. POSITION and V. POSITION until the 
screen image is completely visible. (The black border around the edge of the screen should 
barely touch the illuminated “active area” of the LCD display.) 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
  
 
  
						

							 9  
Main Menu Controls 
Adjust the menu items shown below by using the up  and down  buttons.   
 
Control Explanation 
 
Auto Image Adjust automatically sizes, centers, and fine tunes the video signal 
to eliminate waviness and distortion. Press the [2] button to obtain a sharper 
image. 
NOTE: Auto Image Adjust works with most common video cards. If this 
function does not work on your LCD display, then lower the video refresh rate 
to 60 Hz and set the resolution to its pre-set value. 
 
Contrast adjusts the difference between the image background (black level) 
and the foreground (white level). 
 
Brightness adjusts background black level of the screen image. 
 
Color Adjust provides several color adjustment modes, including preset color 
temperatures and a User Color mode which allows independent adjustment of 
red (R), green (G), and blue (B). The factory setting for this product is 6500K 
(6500 Kelvin). 
 
 
 
 
 
 
 
 
 
 
 
sRGB-This is quickly becoming the industry standard for color management, 
with support being included in many of the latest applications. Enabling this 
setting allows the LCD display to more accurately display colors the way they 
were originally intended. Enabling the sRGB setting will cause the Contrast and 
Brightness adjustments to be disabled. 
 
9300K-Adds blue to the screen image for cooler white (used in most office 
settings with fluorescent lighting). 
 
6500K-Adds red to the screen image for warmer white and richer red. 
 
5400K-Adds green to the screen image for a darker color. 
 
User Color Individual adjustments for red (R), green (G), and blue (B). 
1. To select color (R, G or B) press button [2]. 
2. To adjust selected color, pressand.    
Important: If you select RECALL from the Main Menu when the product is set 
to a Preset Timing Mode, colors return to the 6500K factory preset.