Service Manual
ViewSonic VP930-2
VP930b-2
Model No. VS10725
19” Color TFT LCD Display
(VP930-2_VP930b-2_SM Rev. 1a Mar. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright ¤ 2006 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.
Revision History
Revision |
SM Editing Date |
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Description of Changes |
Editor |
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1a |
03/20/06 |
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Initail Release |
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Jamie Chang |
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Confidential - Do Not Copy VP930-2_VP930b-2 |
i
TABLE OF CONTENTS
1. Precautions and Safety Notices |
1 |
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2. |
Specification |
5 |
3. |
Front Panel Function Control Description |
10 |
4. |
Circuit Description |
17 |
5. |
Adjustment Procedure |
18 |
6. |
Troubleshooting Flow Chart |
30 |
7. Recommended Spare Parts List |
35 |
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8. |
Exploded Diagram and Exploded Parts List |
43 |
9. |
Block Diagram |
50 |
10. |
Schematic Diagrams |
51 |
11. |
PCB Layout Diagrams |
57 |
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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)Use only a high quality, safety approved AC/DC power cord.
(5)Disconnect the power plug from the AC outlet if the product will not be used for a long period of time.
(6)If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display off.
(7)Do not touch the LCD panel surface with sharp or hard objects.
(8)Do not place heavy objects on the LCD display, video cable, or power cord.
(9)Do not use abrasive cleaners, waxes or solvents for your cleaning.
(10)Do not operate the product under the following conditions:
-Extremely hot, cold or humid environment.
-Areas containing excessive dust and dirt.
-Near any appliance generating a strong magnetic field.
-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 display. Because of the high voltage used in the inverter circuit, the voltage is exposed in such areas as the associated transformer circuits.
4.LCD Module Handling Precautions
4.1Handling Precautions
(1)Since front polarizer is easily damaged, pay attention not to scratch it.
(2)Be sure to turn off power supply when connecting or disconnecting input connector.
(3)Wipe off water drops 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 ensure human earth when handling.
(7)Do not open or modify the Module Assembly.
(8)Do not press the reflector sheet at the back of the module in any direction.
(9)In the event that a Module must be put back into the packing container slot after it was taken out of the container, do not press the center of the CCFL Reflector edge. Instead, press at the far ends of the CFL 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 or tilt the Interface Connector of the TFT Module.
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(11)After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist or bend the TFT Module even momentarily. When designing the enclosure, it should be taken into consideration that no bending/twisting forces may be applied to the TFT Module from outside. Otherwise the TFT Module may be damaged.
(12)The cold cathode fluorescent lamp in the LCD contains a small amount of mercury. Please follow local ordinances or regulations for disposal.
(13)The LCD module contains a small amount of materials having no flammability grade. The LCD module should be supplied with power that complies with the requirements of Limited Power Source (IEC60950 or UL1950), or an exemption should be applied for.
(14)The LCD module is designed so that the CCFL in it is supplied by a Limited Current Circuit (IEC60950 or UL1950). Do not connect the CCFL to a Hazardous Voltage Circuit.
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2
Correct Methods: |
Incorrect Methods: |
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Only touch the metal frame of the LCD |
Surface of the LCD panel is pressed by |
panel or the front cover of the monitor.Do |
fingers and that will probably cause |
not touch the surface of the polarizer. |
“Mura”. |
Take out the monitor with cushions |
Taking out the monitor by grasping the |
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LCD panel.That will probably cause |
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“Mura”. |
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Place the monitor on a clean and soft foam pad.
Placing the monitor on foreign objects. That will probably scratch the surface of the panel or cause “Mura.”
The panel is placed facedown on the lap. That will probably cause “Mura.”
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4
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2.SPECIFICATIONS |
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GENERAL specification |
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Test Resolution & Frequency |
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1280x1024 @ 60Hz |
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Test Image Size |
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Full Size |
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Contrast and Brightness Controls |
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Factory Default: |
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Contrast = 70%, Brightness = 100% |
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VIDEO INTERFACE |
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Input Connector (refer the appendix A) |
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D-Sub1 = DB-15 (Analog) |
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D-Sub2 = DB-15 (Analog) |
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DVI-D = DVI-I (Digital) |
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Default Input Connector |
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Defaults to the first detected input |
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Video Cable Strain Relief |
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Equal to twice the weight of the monitor for |
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five minutes |
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Video Cable Connector DB-15 Pin out |
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Compliant DDC/CI |
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Video RGB (Analog) |
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Video Signals |
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Separate Sync / Composite Sync / SOG |
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TMDS (Digital) |
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Video Impedance |
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75 Ohms (Analog), 100 Ohms (Digital) |
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Maximum PC Video Signal |
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950 mV with no damage to monitor |
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Maximum Mac Video Signal |
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1250 mV with no damage to monitor |
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Sync Signals |
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TTL |
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DDC/CI |
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Compliant with Revision 1.0 |
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Sync Compatibility |
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Separate Sync / Composite Sync / SOG |
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Shall be compatible with all PC type |
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Video Compatibility |
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computers, Macintosh computers, and after |
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market video cards |
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640 x 350, 640 x 400, 640 x 480, 640 x 870, |
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720 x 400, 720 x 480, 720 x 576, 800 x 600, |
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832 x 624, 1024 x 768, 1152 x 864, 1152 x |
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870, 1280 x 720, 1280 x 768, 1280 x 960, |
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Resolution Compatibility |
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1280 x 1024 |
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Exclusions |
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Not compatible with interlaced video |
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Horizontal / Vertical Frequency |
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Horizontal Frequency |
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24 – 82 KHZ |
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Vertical Refresh Rate |
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50 – 85 HZ |
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Maximum Pixel Clock |
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135 MHz |
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Sync Polarity |
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Independent of sync polarity |
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Confidential - Do Not Copy VP930-2_VP930b-2 |
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5 |
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Table : 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 |
Ground |
11 |
No connection |
12 |
(SDA) |
13 |
Horizontal sync (Composite sync) |
14 |
Vertical sync |
15 |
(SCL) |
Timing Table
Item |
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Timing |
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Analog |
Digital |
Remark |
1 |
640 x 350 |
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70 Hz, |
31.5 |
KHz |
Yes |
Yes |
DMT; |
2 |
640 x 400 |
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60 Hz, |
31.5 |
KHz |
Yes |
Yes |
DMT |
3 |
640 x 400 |
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70 Hz, |
31.5 |
KHz |
Yes |
Yes |
DMT |
4 |
640 x 480 |
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50 Hz, |
24.7 |
KHz |
Yes |
Yes |
DMT |
5 |
640 x 480 |
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60 Hz, |
31.5 |
KHz |
Yes |
Yes |
DMT; |
6 |
640 x 480 |
@ |
67 Hz, |
35.0 |
KHz |
Yes |
Yes |
For MAC |
7 |
640 x 480 |
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72 Hz, |
37.9 |
KHz |
Yes |
Yes |
DMT |
8 |
640 x 480 |
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75 Hz, |
37.5 |
KHz |
Yes |
Yes |
DMT |
9 |
640 x 480 |
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85 Hz, |
43.3 |
KHz |
Yes |
Yes |
DMT |
10 |
640 x 870 |
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75 Hz, |
68.9 |
KHz |
Yes |
Yes |
MAC |
11 |
720 x 400 |
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70 Hz, |
31.5 |
KHz |
Separate |
Yes |
DMT |
Only |
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12 |
720 x 480 |
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60 Hz, |
31.5 |
KHz |
Yes |
Yes |
DMT |
13 |
720 x 576 |
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50 Hz, |
31.3 |
KHz |
Yes |
Yes |
DMT” |
14 |
800 x 600 |
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56 Hz, |
35.1 |
KHz |
Yes |
Yes |
DMT |
15 |
800 x 600 |
@ |
60 Hz, |
37.9 |
KHz |
Yes |
Yes |
DMT |
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16 |
800 x 600 |
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72 Hz, |
48.1 |
KHz |
Yes |
Yes |
DMT |
17 |
800 x 600 |
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75 Hz, |
46.9 |
KHz |
Yes |
Yes |
DMT |
18 |
800 x 600 |
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85 Hz, |
53.7 |
KHz |
Yes |
Yes |
DMT |
19 |
832 x 624 |
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75 Hz, |
49.7 |
KHz |
Yes |
Yes |
MAC |
20 |
1024 x 768 |
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50 Hz, |
39.6 |
KHz |
Yes |
Yes |
DMT; |
21 |
1024 x 768 |
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60 Hz, |
48.4 |
KHz |
Yes |
Yes |
DMT |
22 |
1024 x 768 |
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70 Hz, |
56.5 |
KHz |
Yes |
Yes |
DMT |
23 |
1024 x 768 |
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72 Hz, |
58.1 |
KHz |
Yes |
Yes |
DMT |
24 |
1024 x 768 |
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75 Hz, |
60.0 |
KHz |
Yes |
Yes |
DMT |
25 |
1024 x 768 |
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75 Hz, |
60.2 |
KHz |
Yes |
Yes |
For MAC |
26 |
1024 x 768 |
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85 Hz, |
68.7 |
KHz |
Yes |
Yes |
DMT |
27 |
1152 x 864 |
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75 Hz, |
67.5 |
KHz |
Yes |
Yes |
DMT |
28 |
1152 x 870 |
@ |
75 Hz, |
68.7 |
KHz |
Yes |
Yes |
For MAC |
29 |
1280 x 720 |
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50 Hz, |
37.5 |
KHz |
Yes |
Yes |
720p |
30 |
1280 x 720 |
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60 Hz, |
45.0 |
KHz |
Yes |
Yes |
720p |
31 |
1280 x 768 |
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50 Hz, |
39.6 |
KHz |
Yes |
Yes |
DMT |
32 |
1280 x 768 |
@ |
60 Hz, |
47.8 |
KHz |
Separate |
Yes |
DMT; |
Only |
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33 |
1280 x 768 |
@ |
75 Hz, |
60.3 |
KHz |
Separate |
Yes |
DMT; |
Only |
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34 |
1280 x 768 |
@ |
85 Hz, |
68.6 |
KHz |
Separate |
Yes |
DMT;” |
Only |
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35 |
1280 x 960 |
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50 Hz, |
49.4 |
KHz |
Yes |
Yes |
DMT |
36 |
1280 x 960 |
@ |
60 Hz, |
59.7 |
KHz |
Yes |
Yes |
DMT |
37 |
1280 x 960 |
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75 Hz, |
75.2 |
KHz |
Yes |
Yes |
DMT |
38 |
1280 x 1024 @ |
50 Hz, |
52.7 |
KHz |
Yes |
Yes |
DMT |
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39 |
1280 x 1024 @ |
60 Hz, |
64.0 |
KHz |
Yes |
Yes |
DMT |
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40 |
1280 x 1024 @ |
75 Hz, |
80.0 |
KHz |
Yes |
Yes |
DMT |
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*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.
Primary Presets
1280x1024 @ 60Hz
User Presets
Number of User Presets (recognized timings) Available: 10 presets total in FIFO configuration
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Panel Characteristics
1st Source Panel
Model number |
AUO M190EN03 V.2 |
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Type |
Active Matrix TFT, TN technology |
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Active Size |
19” |
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Pixel Arrangement |
RGB Vertical Stripe |
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Pixel Pitch |
0.294 mm |
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Glass Treatment |
Anti-Glare |
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# of Backlights |
4 CCFL |
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Backlight Life |
50000 Hrs (Typ) |
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30000 Hrs (Min) |
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Luminance (Center) – |
250 cd/m2 (Typ after 30 minute warm up) |
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CT = 6500K, |
200 cd/m2 (Min after 30 minute warm up) |
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Contrast/ Brightness = Max |
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Brightness Uniformity |
80 % (Typ) / 75 % (Min) |
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Contrast Ratio |
1000 :1 (Typ) |
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750 : 1 (Min) |
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Color Depth |
16.7 million colors (8 bit panel) |
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Horizontal Viewing Angle |
170 degrees (Typ) / 150 degrees (Min) @ CR>10 |
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Vertical Viewing Angle |
130 degrees (Typ) / 110 degrees (Min) @ CR>10 |
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Response Time |
GTG |
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10%-90% @ Ta=25°C |
8ms (Avg) / 16ms (Max) |
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Mercury |
3.0 mg per lamp |
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Panel Defects |
Please see Panel Quality Specifications. |
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8
IMAGE PERFORMANCE
Factory Defaults
Item |
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Defaults |
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Item |
Defaults |
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Contrast |
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70% |
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Input Priority |
Auto Search |
Brightness |
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100% |
Resolution Notice |
Enabled |
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Color Temperature |
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6500K |
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Volume |
N/A |
Sharpness |
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100% |
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Balance |
N/A |
OSD H. Position |
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50% |
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Treble |
N/A |
OSD V. Position |
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50% |
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Bass |
N/A |
OSD Time Out |
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15 Sec |
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OSD Background |
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Enabled |
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Dimension (Desktop) |
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Width |
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412mm (16.2" |
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Height (Height adjust to the bottom) |
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356mm (14") / 491mm (19.3") |
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Depth |
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289mm (11.4" |
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Monitor Weight |
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6.8 Kg (15 lbs) |
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*Refer to Figure 1 |
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Dimension (Head Only / Wall Mount) |
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Width |
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412mm (16.2" |
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Height |
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336mm (13.2" |
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Depth |
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61mm (2.4 |
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Monitor Weight |
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4.2 Kg (9.3 lbs) |
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*Refer to Figure 1 |
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Ergonomics |
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Tilt Up |
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20º |
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Tilt Down |
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From 0º down to -3º ~ -5º |
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Swivel Right |
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135º |
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Swivel Left |
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135º |
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Height Adjust |
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0 ~ 135 mm |
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Pivot |
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0~90 degrees (Clockwise) |
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3.Front Panel Function Control Description
3.1Location of Controls
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