ViewSonic Vp9303 Service Manual

							
 
 
ViewSonic VP930-3  VP930b-3 
Model No. VS10725 
19” Color TFT LCD  Display 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(VP930-3_VP930b-3 _SM Rev. 1a Oct. 2006) 
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583 
Service Manual  
						

							
ViewSonic Corporation Confidential - Do Not Copy  VP930-3_VP930b-3 
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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 
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. 
 
 
 
Revision History 
Revision  SM Editing Date  ECR Number  Description of Changes  Editor 
1a               10/26/2006      Initial Release  J. Chang 
       
       
       
       
       
       
  
						

							
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TABLE OF CONTENTS 
 
 
1.  Precautions and Safety Notices    1
2. Specification   4
3.  Front Panel Function Control Description   7
4. Circuit Description  13
5. Adjustment Procedure  20
6.  Troubleshooting Flow Chart  39
7.  Recommended Spare Parts List 43
8. Exploded Diagram and Exploded Parts List  57
9. Block Diagram  62
10. Schematic Diagrams 63
11.  PCB Layout Diagrams 70
 
  
						

							
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1. Precautions and Safety Notices 
 
  1. Appropriate Operation  
 
(1)  Turn off the product before cleaning. 
(2)  Use only a dry soft cloth when  cleaning the LCD panel surface. 
(3)  Use a soft cloth soaked with mild detergent to clean the display housing. 
(4)  Disconnect the power plug from AC outlet if the product is not used for a long period of  time. 
(5)  If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display 
off. 
(6)  Do not touch the LCD panel su rface with sharp or hard objects. 
(7)  Do not place heavy objects on the LCD  display, video cable, or power cord. 
(8)  Do not use abrasive cleaners, wa xes or solvents for your cleaning. 
(9)  Do not operate the produc t under the following conditions: 
- Extremely hot, cold or humid environment. 
- Areas susceptible to excessive dust and dirt. 
- Near any appliance generating a strong magnetic field. 
- Place in direct sunlight. 
 
2. Caution  No modification of any circuit should be attempted. Service work should  only be performed after 
you are thoroughly familiar 
with all of the following safety checks and servicing guidelines. 
 
3. Safety Check  Care should be taken while servicing this LCD disp lay. Because of the high voltage used in the 
inverter circuit, the voltage is exposed in such  areas as the associated transformer circuits. 
 
4.  Power Supply Requirements  The external AC power operating range shall be from 90 to 264Vac 
 
5.  LCD Module Handling Precautions  5.1. Handling Precautions  
(1)  Since front polarizer is easily damaged, pay attention not to scratch it. 
(2)  Be sure to turn off power supply when inserting or disconnecting from input connector. 
(3)  Wipe off water drop immediately. Long contact with water may cause discoloration or 
spots. 
(4)  When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth. 
(5)  Since the panel is made of glass, it may break or crack if dropped or bumped on hard  surface. 
(6)  Since CMOS LSI is used in this module, take care of static electricity and insure human 
earth when handling. 
(7)  Do not open nor modify the Module Assembly. 
(8)  Do not press the reflector sheet at the back of the module to any directions. 
(9)  In case if a Module has to be put back into the packing container slot after once it was 
taken out from the container, do not press the center of the CCFL Reflector edge. 
Instead, press at the far ends of the CF L Reflector edge softly. Otherwise the TFT 
Module may be damaged. 
(10)  At the insertion or removal of the Signal  Interface Connector, be sure not to rotate nor 
tilt the Interface Connector of the TFT Module. 
(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for 
example), do not twist nor bend the TFT Module even momentary. At designing the 
enclosure, it should be taken into consideration that no bending/twisting forces are 
applied to the TFT Module from outside. Otherwise the TFT Module may be damaged. 
(12) Cold cathode fluorescent lamp in LCD contains a small amount of mercury. Please 
follow local ordinances or regulations for disposal. 
(13)  Small amount of ma terials having no flammability gr ade is used in the LCD module. 
The LCD module should be supplied by power complied with requirements of Limited 
Power Source (IEC60950 or UL1950), or be applied exemption.  
						

							
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(14) The LCD module is designed so that the CFL in it is supplied by Limited Current Circuit (IEC60950 or UL1950). Do  not connect the CFL in Hazardous Voltage Circuit. 
  5.2.  Handling 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 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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Place the monitor on a clean and soft foam pa d. Placing the monitor on foreign 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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2. Specification 
 
 1. General Requirements
 
General Specifications 
Test Resolution & Frequency  “1280 x 1024” @ 60Hz 
Test Image Size Full Size 
Contrast and Brightness Controls  Factory Default: 
Contrast = 70%, Brightness = 100% 
 
2. Signal Interface 
Video Interface 
Analog Input Connector  D-Sub1 = DB-15 (Analog) 
D-Sub2 = DB-15 (Analog) 
DVI-D = DVI-I (Digital) 
Default Input Connector  Defaults to the first detected input 
Video Cable Connector    Pin out Refer to Appendix A; Compliant DDC/CI.  
Video Signals  Video RGB (Analog) 
Separate Sync / Composite Sync / SOG  
TMDS (Digital)  
Video Impedance   75 Ohms (Analog), 100 Ohms (Digital)  
Exclusions Not  compatible with interlaced video. 
 
3. Power 
Power Supply 
Input Voltage Range   90 to 264 VAC 
Power Dissipation  38 Watts (Typ.) 
 
4.  AUDIO INTERFACE (SPEAKER SPECIFICATION) 
 
No Audio  function 
 
5. lectrical Requirements  
Horizontal Frequency  24 – 82 kHz   
Vertical Refresh Rate  50 – 85 Hz. 
Maximum Pixel Clock 135 MHz 
Sync Polarity  Independent of sync polarity. 
 
Timing Table 
Analog 
Item Timing 
Separated 
Composite  SOG 
Digital - TMDS 
Remark 
1  640 x 350  @  70  Hz, 31.5 KHz
　 　 　 　DMT; 
The vertical 
image size might 
be not full screen
2  640 x 400  @  60  Hz, 31.5 KHz 　 　 　 　DMT 
3  640 x 400  @  70  Hz, 31.5 KHz 　 　 　 　DMT 
4  640 x 480  @  50  Hz, 24.7 KHz 　 　 　 　DMT 
5  640 x 480  @  60  Hz, 31.5 KHz 　 　 　 　DMT; 
6  640 x 480  @  67  Hz, 35  KHz 　 　 　 　For MAC 
7  640 x 480  @  72  Hz, 37.9 KHz 　 　 　 　DMT  
						

							
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8  640 x 480  @  75  Hz, 37.5 KHz 　 　 　 　DMT 
9  640 x 480  @  85  Hz, 43.3 KHz 　 　 　 　DMT 
10  640 x 870  @  75  Hz, 68.9 KHz 　 　 　 　MAC 
11  720 x 400  @  70  Hz, 31.5 KHz 　   　 DMT 
12  720 x 480  @  60  Hz, 31.5 KHz 　 　 　 　DMT 
13  720 x 576  @  50  Hz, 31.3 KHz 　 　 　 　DMT” 
14  800 x 600  @  56  Hz, 35.1 KHz 　 　 　 　DMT 
15  800 x 600  @  60  Hz, 37.9 KHz 　 　 　 　DMT 
16  800 x 600  @  72  Hz, 48.1 KHz 　 　 　 　DMT 
17  800 x 600  @  75  Hz, 46.9 KHz 　 　 　 　DMT 
18  800 x 600  @  85  Hz, 53.7 KHz 　 　 　 　DMT 
19  832 x 624  @  75  Hz, 49.7 KHz 　 　 　 　MAC 
20  1024 x 768  @  50  Hz, 39.6 KHz 　 　 　 　DMT; 
21  1024 x 768  @  60  Hz, 48.4 KHz 　 　 　 　DMT 
22  1024 x 768  @  70  Hz, 56.5 KHz 　 　 　 　DMT 
23  1024 x 768  @  72  Hz, 58.1 KHz 　 　 　 　DMT 
24  1024 x 768  @  75  Hz, 60  KHz 　 　 　 　DMT 
25  1024 x 768  @  75  Hz, 60.2 KHz 　 　 　 　For MAC 
26  1024 x 768  @  85  Hz, 68.7 KHz 　 　 　 　DMT 
27  1152 x 864  @  75  Hz, 67.5 KHz 　 　 　 　DMT 
28  1152 x 870  @  75  Hz, 68.7 KHz 　 　 　 　For MAC 
29  1280 x 720  @  50  Hz, 37.5 KHz 　 　 　 　720p 
30  1280 x 720  @  60  Hz, 45  KHz 　 　 　 　720p 
31  1280 x 768  @  50  Hz, 39.6 KHz 　 　 　 　DMT 
32  1280 x 768  @  60  Hz, 47.8 KHz 　   　 DMT; 
33  1280 x 768  @  75  Hz, 60.3 KHz 　   　 DMT; 
34  1280 x 768  @  85  Hz, 68.6 KHz 　   　 DMT;” 
35  1280 x 960  @  50  Hz, 49.4 KHz 　 　 　 　DMT 
36  1280 x 960  @  60  Hz, 59.7 KHz 　 　 　 　DMT 
37  1280 x 960  @  75  Hz, 75.2 KHz 　 　 　 　DMT 
38  1280 x 1024  @  50  Hz, 52.7 KHz 　 　 　 　DMT 
39  1280 x 1024  @  60  Hz, 64  KHz 　 　 　 　DMT 
40  1280 x 1024  @  75  Hz, 80  KHz 　 　 　 　DMT 
*1. Tolerance ≥ ±2KHz. 
*2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD  message without blanking. 
*3. The image quality of 85Hz mode might be worse than 75Hz. 
  6. Mechanical 
Dimension (Desktop)   
Width  412 mm (16.2 inch) 
Height (Height adjust to the bottom)  356mm (14 inch)/491mm (19.32 inch)
Depth 289mm (11.4 inch) 
Monitor Weight 6.8 Kg (15 lbs) 
  
Dimension (Head Only / Wall Mount)   
Width  412 mm (16.2 inch) 
Height  336mm (13.2 inch)  
						

							
 
 Depth  61mm (2.4 inch) 
Monitor Weight  4.2 Kg (9.3 lbs) 
*Refer to Figure 1   
  
Ergonomics  
Tilt Up 
≥ 20º 
Tilt Down  From 0º down to -3º 
Swivel Right  ≥135º 
Swivel Left  ≥135º 
Height Adjust  0  ~  ≥ 135 mm 
Pivot 0~ 90º(clockwise) 
 
Package Specifications 
ViewSonic Packaging Spec  The “Top Level Assembly” shall 
meet the ViewSonic Corporation 
Packaging Spec, VSCPACSPEC003 
ViewSonic Pallet Spec  Refer to ViewS onic Pallet Load Specification REV.1.I 
Ink  The ink shall not rub off after a suitable drying time. 
Multiple Trips The carton shall withstand 10 trips by any combination of air, rail, 
land, or sea transportation.     
 
One Unit Packing (Standard) 
Shipping Carton Type  One piece constr
uction with single wall, 0.6 Kg 
Shipping Carton Handholds  No 
Plastic handle  PE-LD, 12 g 
Poly form  EPS, 128 g, 2 pices 
Accessory plastic bags  PE-LD, 2g 
PE bag (covers monitor)  PE-LD, 3g 
Pallet (for Europe)  Poplar, 10 Kg 
Pallet (for others)  Fumigation wood, 10 Kg 
Width / Height / Depth  476 mm (18.7 ) x 470 mm (18.5 ) x 214 mm (8.4) 
Gross Weight  8.3 Kg (18.26 lbs) 
# units per Pallet  48 units 
40’ Container Loading 960 pieces 
20’ Container Loading 480 pieces 
 
7. Environmental 
Operating Temperature  0°C to +40°C 
Storage Temperature  -20°C to +60°C 
Operating Relative Humidity  20% to 90% RH Non-Condensing 
Storage Relative Humidity  5% to 90% RH Non-Condensing 
Operating Altitude  0 to +3,000 meters 
Storage Altitude  0 to +12,000 meters 
 
 
 
 
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3. Front Panel Function Control Description 
 
Main Menu
with OSD controls
Front Control Panel
shown below in detail
Scrolls through menu options and adjusts the 
displayed control.
Also a shortcut to display the Contrast adjustment 
control screen.
Displays the control screen for the 
highlighted control.
Also toggles between two controls on 
some screens.
Also a shortcut to toggle analog and 
digital connection.
Power light
Green = ON
Orange = Power Saving
Standby Power 
On/Off
Displays the Main
Menu or exits the
control screen and
saves adjustments.