ViewSonic VS11425 User manual

ViewSonic VG2030wm-1

Model No. VS11425

20” Color TFT LCD Display

(VG2030wm-1_SM Rev. 1a Nov. 2006)

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA- (800) 888-8583

Service Manual

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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 ECR Number Description of Changes Editor

1a 11/28/2006 Initial Release Jamie Chang

ViewSonic Corporation Confidential - Do Not Copy VG2030wm-1

TABLE OF CONTENTS

1. Precautions and Safety Notices 1

2. Specification 3

3. Front Panel Function Control Description 11

4. Circuit Description 17

5. Adjustment Procedure 21

6. Troubleshooting Flow Chart 36

7. Block Diagram 39

8. Schematic Diagrams 40

9. PCB Layout Diagrams 50

10. Exploded Diagram and Exploded Parts List 58

11. Recommended Spare Parts List 62

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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 surface 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, waxes or solvents for your cleaning.

(9) Do not operate the product 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 display. 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 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 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 materials having no flammability grade 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.

(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.

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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”

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2. Specification

Product definition and specification

Product Name ViewSonic VG2030wm

Oracle P/N VG2030WM

Model Number VS11425

OSD Languages English, French, German, Italian, Spanish, Finnish, Japanese,

Traditional Chinese, Simplified Chinese

TFT LCD Panel and Model # 1st Source: AUO M201EW02 V.0

Scalar Realtek RTD2553V

Input Signal Analog x1 / Digital x1

Sync Compatibility Separate Sync / Composite Sync / SOG

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 AppendixA)

DVI-D Cable(1.8m, black) with PC 2001 Yes

(refer the Appendix A)

Audio Cable(1.8m, black) with PC 2001 Yes

MIC Cable(1.8m, black) with PC 2001 No

USB Cable (V2.0) No

ViewSonic CD Wizard

ViewSonic Quick Start Guide

Arabic, English, Finnish, Spanish, German, Italian, Japanese,

Swedish, Polish, Korean, Portuguese, Russian, Turkish , French,

Czech, Hungarian, Simplified Chinese, Traditional Chinese

PerfectSuite CD Yes

Screen Protector Mylar Yes

Foot Protector plastic Yes, for left-front and right-front foot

Service Insert For Region code = M units only

Warranty Sticker For Region code = G units only

Warranty Card For Region code = G units only

Carton Sticker For Region code = G units only

PE bag of Carton For Region code = G units only

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1 GENERAL specification

Test Resolution & Frequency 1680x1050 @ 60Hz

Test Image Size Full Size

Contrast and Brightness Controls Factory Default:

Contrast = 70%, Brightness = 100%

2 VIDEO INTERFACE

Input Connector (refer theAppendix A) Analog = DB-15

Digital = DVI-D

Default Input Connector Defaults to the first detected input

Video Cable Strain Relief Equal to twice the weight of the monitor for five minutes

Video Cable Connector Pin out Refer to AppendixA; Compliant DDC/2B

Video Signals

Video RGB (Analog)

Separate Sync / Composite Sync / SOG

TMDS (Digital)

Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)

Maximum PC Video Signal 950 mV with no damage to monitor

Maximum Mac Video Signal 1250 mV with no damage to monitor

Sync Signals TTL

DDC/2B Compliant with version 3

Sync Compatibility Separate Sync / Composite Sync / SOG

Video Compatibility Shall be compatible with all PC type computers, Macintosh computers,

and after market video cards

Resolution Compatibility Refer to Segment 5

Exclusions Not compatible with interlaced video

3 USB INTERFACE

No USB interface

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4 POWER SUPPLY

Internal Power Supply HJC H0AU032001

Input Voltage Range 90 to 264 VAC

Input Frequency Range 47 to 63 Hertz

Short Circuit Protection Output can be shorted without damage

Over Current Protection 5.0 A typical at 12.0 VDC

Leakage Current 3.5mA(Max) at 254VAC / 60Hz

Efficiency (at 115VAC Full Load) Typical: 80%

Minimum: 75%

Fuse Internal and not user replaceable

Power Output 38 Watts (typ)

Ripple and Noise Ripple: <3%

Noise: <1%

Max Input AC Current 1.5 Arms @ 90VAC, 0.75 Arms @180VAC

Inrush Current (Cold Start) 50 A (max) @ 115VAC

90 A (max) @ 230VAC

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 properly, 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 user. Audible shall defined to be in compliance with

ISO 7779 (DIN EN27779:1991) Noise measurements of machines

acoustics. Power Switch noise shall not be considered.

Power Saving Operation(Method) VESA DPMS Signaling

Power Consumption

Mode LED Power Consumption

On Blue

With Audio

50W (typ)

55W (max)

WithoutAudio

43W (typ)

48W (max)

Active off Amber <1W

Off Off <1W

Recovery Time On Mode = N/A, Active Off < 3 sec

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5 ELECTRICAL REQUIREMENT

Horizontal / Vertical Frequency

Horizontal Frequency 24 – 82 kHz

Vertical Refresh Rate 50 – 85 Hz

Maximum Pixel Clock 165 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 　　　　 For SOG sync, OSD will be 720x400@70Hz.

2 640 x 400 @ 60 Hz, 31.5 KHz

For SOG sync, switch 640x400@60Hz and

640x480@60Hz by [1]+[2] short cut key

(primary=640x480@60Hz)

3 640 x 400 @ 70 Hz, 31.5 KHz

For Analog sync, OSD will be

640x400@70Hz/720x400@70Hz.

(Promary=720x400@70Hz)

4 640 x 480 @ 50 Hz, 24.7 KHz 　　　　

5 640 x 480 @ 60 Hz, 31.5 KHz

For SOG sync, switch 640x400@60Hz and

640x480@60Hz by [1]+[2] short cut key

(primary=640x480@60Hz)

6 640 x 480 @ 67 Hz, 35 KHz 　　　　

7 640 x 480 @ 72 Hz, 37.9 KHz 　　　　

8 640 x 480 @ 75 Hz, 37.5 KHz 　　　　

9 640 x 480 @ 85 Hz, 43.3 KHz 　　　　

10 720 x 400 @ 70 Hz, 31.5 KHz

For Analog sync, OSD will be

640x400@70Hz/720x400@70Hz.

(Promary=720x400@70Hz)

11 720 x 480 @ 60 Hz, 31.5 KHz 　

12 720 x 576 @ 50 Hz, 31.3 KHz 　

13 800 x 600 @ 50 Hz, 24.7 KHz 　　　　

14 800 x 600 @ 56 Hz, 35.1 KHz 　　　　

15 800 x 600 @ 60 Hz, 37.9 KHz 　　　　

16 800 x 600 @ 70 Hz, 43 KHz 　　　　

17 800 x 600 @ 72 Hz, 48.1 KHz 　　　　

18 800 x 600 @ 75 Hz, 46.9 KHz 　　　　

19 800 x 600 @ 85 Hz, 53.7 KHz 　　　　

20 832 x 624 @ 75 Hz, 49.7 KHz 　　　　

21 1024 x 768 @ 50 Hz, 39.6 KHz

For SOG sync, the Information OSD will be

1024x768@50Hz, the OSD content also can be changed

to 1280x768@50Hz by [1]+[2] short cut key.

22 1024 x 768 @ 60 Hz, 48.4 KHz

For SOG sync, the Information OSD will be

1024x768@60Hz, the OSD content also can be changed

to 1280x768@60Hz by [1]+[2] short cut key.

23 1024 x 768 @ 70 Hz, 56.5 KHz 　　　　

24 1024 x 768 @ 72 Hz, 58.1 KHz 　　　　

25 1024 x 768 @ 75 Hz, 60 KHz

For SOG sync, the Information OSD will be

1024x768@75Hz, the OSD content also can be changed

to 1280x768@75Hz by [1]+[2] short cut key.

26 1024 x 768 @ 85 Hz, 68.7 KHz 　　　　

27 1152 x 864 @ 75 Hz, 67.5 KHz 　　　　

28 1152 x 870 @ 75 Hz, 68.7 KHz 　　　　

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29 1280 x 720 @ 50 Hz, 37.5 KHz 　　

30 1280 x 720 @ 60 Hz, 45 KHz 　　

31 1280 x 768 @ 50 Hz, 39.6 KHz

For SOG sync, the Information OSD will be

1024x768@50Hz, the OSD content also can be changed

to 1280x768@50Hz by [1]+[2] short cut key.

32 1280 x 768 @ 60 Hz, 47.8 KHz

For SOG sync, the Information OSD will be

1024x768@60Hz, the OSD content also can be changed

to 1280x768@60Hz by [1]+[2] short cut key.

33 1280 x 768 @ 75 Hz, 60.3 KHz

For SOG sync, the Information OSD will be

1024x768@75Hz, the OSD content also can be changed

to 1280x768@75Hz by [1]+[2] short cut key.

34 1280 x 960 @ 50 Hz, 49.4 KHz 　　　　

35 1280 x 960 @ 60 Hz, 59.7 KHz 　　　　

36 1280 x 960 @ 75 Hz, 75.2 KHz 　　　　

37 1280 x 1024 @ 60 Hz, 64 KHz 　　　　

38 1280 x 1024 @ 75 Hz, 80 KHz 　　　　

39 1400 x 1050 @ 60 Hz, 65.3 KHz

For Analog sync, switch 1680x1050@60Hz and

1400x1050@60Hz by [1]+[2] short cut key

(primary=1680x1050@60Hz)

40 1440 x 900 @ 60 Hz, 55.5 KHz 　　　　

41 1440 x 900 @ 75 Hz, 75 KHz 　　　　

42 1600 x 1200 @ 60 Hz, 75 KHz 　　　　

43 1680 x 1050 @ 60 Hz, 64.7 KHz

For Analog sync, switch 1680x1050@60Hz and

1400x1050@60Hz by [1]+[2] short cut key

(primary=1680x1050@60Hz)

*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.

7 AUDIO INTERFACE (SPEAKER SPECIFICATION)

SPEAKER SPECIFICATION

LINE INPUT CONNECTION 3.5 MM STEREO JACK

LINE INPUT SIGNAL 1.0 VRMS

LINE INPUT IMPEDANCE 10 KOHM

MAXIMUM POWER OUTPUT (ELECTRIC) 2 W / CH

SIGNAL TO NOISE RATIO 50 DB

FREQUENCY RESPONSE 100 HZ – 20 KHZ

DISTORTION < 10 % THD (@1KHZ)

VIBRATION THERE SHOULD BE NO AUDIBLE VIBRATION

WITH VOLUME AT 100%AND TREBLE / BASS

AT DEFAULT.

SCREEN IMAGE THERE SHOULD BE NO AFFECT ON THE

SCREEN IMAGE STABILITY UNDERANY

CONDITIONS.

CONNECTOR PC99 REQUIREMENTAUDIO IN LIME GREEN PANTONE # 577C

CABLE TYPE / LENGTH 3.5MM STEREO CABLE / 1.8M LENGTH

AUDIO DPMS SPEAKERS SHOULD BE OFF WHEN THE REST

OF THE MONITOR IS IN POWER SAVING.

* No any sympathetic or abnormal noise allowed.

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