Viewsonic VG710bs Service Manual 1b

Service Manual

ViewSonic VG710b/s1

Model No. VLCDS23719-4W/-5W

17” Color TFT LCD Display

ViewSonic

(VG710s/b-1_SM_718 Rev. 1b Aug. 2004)



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

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.

DCN Number ECR Number

26/02/04

12/08/04

Revision History

Documents Number

3601

4645

4499

Initial Release

ECR Change Genesis-gm5120 Scalar Add CMO Panel Sources

Description of Changes EditorRevision SM Editing Date

A. Lu

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

TABLE OF CONTENTS

1. Precautions and Safety Notices

2. Specification

3. Front Panel Function Control Description

4. Circuit Description

5. Adjusting Procedure

6. Trouble Shooting Flow Chart

7. Recommended Spare Parts List

8. Exploded Diagram And Spare Parts List

9. Block Diagram

10. Schematic Diagrams

11. PCB Layout Diagrams

5 8

39 43

53 64 65

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

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 high quality and safety approved AC/DC power adapter. (5) Disconnect the power plug from AC outlet if the product is not 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 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 power converter for this display utilizes AC and DC cords, AC cord is detachable, but DC cord is permanently

attached. Any attempt to replace another adapter could result in serious problem on the display.

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.

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

(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.

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

5.2 Handling and Placing Methods

Correct 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.

Incorrect Methods:

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 Confidential

Do Not Copy VG710b/s-1

Place the monitor on a clean and soft foam pad.

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.”

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

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 = 50%, Brightness = 100%

2. Signal Interface

Video Interface

Analog Input Connector DB-15 (Analog) Digital Input Connector DVI-D (Digital) Default Input Connector Defaults to the first detected input Video Cable Connector DB-15 Pin out Compliant DDC 1/2B. Video Signals

Video Impedance 75 Ohms (Analog), 100 Ohms (Digital) Exclusions Not compatible with interlaced video.

3. Power

Power Supply

External Power Supply Part Number: LSE 0107A1240

Input Voltage Range 90 to 264 VAC Over Voltage Protection 12.7~18V FULL LOAD

Power Dissipation 36 WATTS (TYP)

4. Electrical Requirements

1. Video RGB (Analog)

2. TMDS (Digital)

Separate Sync

Horizontal / Vertical Frequency

Horizontal Frequency 30 – 82 kHz Vertical Refresh Rate 50 – 85 HZ Maximum Pixel Clock 135 MHz Primary Preset “1280 x 1024” @ 60Hz Look up table timing <<Analog>>

1. 640 x 350 @ 70Hz, 31.5kHz

2. 640 x 480 @ 60Hz, 31.5kHz

3. 640 x 480 @ 67Hz, 35.0kHz

4. 640 x 480 @ 75Hz, 37.5kHz

5. 640 x 480 @ 72Hz, 37.9kHz

6. 640 x 480 @ 85Hz, 43.27kHz

7. 720 x 400 @ 70Hz, 31.5kHz

8. 800 x 600 @ 56Hz, 35.1kHz

9. 800 x 600 @ 60Hz, 37.9kHz

10. 800 x 600 @ 75Hz, 46.9kHz

11. 800 x 600 @ 72Hz, 48.1kHz

12. 800 x 600 @ 85Hz, 53.7kHz

13. 832 x 624 @ 75Hz, 49.7kHz

14. 1024 x 768 @ 60Hz, 48.4kHz

15. 1024 x 768 @ 70Hz, 56.5kHz

16. 1024 x 768 @ 72Hz, 58.1kHz

17. 1024 x 768 @ 75Hz, 60.0kHz

18. 1024 x 768 @ 85Hz, 68.67kHz

19. 1280 x 1024 @ 60Hz, 63.4kHz

20. 1280 x 1024 @ 75Hz, 79.97kHz

<<Digital>> 640 x 350 @ 70Hz, 31.5kHz 640 x 400 @ 60Hz, 31.5kHz 640 x 480 @ 60Hz, 31.5kHz 640 x 480 @ 75Hz, 37.5kHz 640 x 480 @ 72Hz, 37.9kHz 640 x 480 @ 85Hz, 43.27kHz 720 x 400 @ 70Hz, 31.5kHz 800 x 600 @ 56Hz, 35.1kHz 800 x 600 @ 60Hz, 37.9kHz 800 x 600 @ 75Hz, 46.9kHz 800 x 600 @ 72Hz, 48.1kHz 800 x 600 @ 85Hz, 53.7kHz 1024 x 768 @ 60Hz, 48.4kHz 1024 x 768 @ 70Hz, 56.5kHz 1024 x 768 @ 72Hz, 58.1kHz 1024 x 768 @ 75Hz, 60.0kHz 1024 x 768 @ 85Hz, 68.67kHz 1280 x 1024 @ 60Hz, 63.4kHz

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

Changing Modes

Maximum Mode Change Blank Time for image stability. Note:

1) Excluding “Auto Adjust” time

2) Under DOS mode (640 x 350, 720 x 400 & 640 x

Under 5 seconds (Maximum)

1 seconds (Typ.) for recognized timings 1-2 seconds (Typ.) for unrecognized timing .

400), there is no “Auto Adjust” feature.

3) The monitor needs to do “Auto Adjust” the first time a new mode is detected.

5. Audio

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) 3 W @ < 5 % DISTORTION Signal to Noise Ratio 72 dB

Frequency response 400 Hz – 20 kHz

Distortion < 5 % THD (@1kHz),

6. LCD Panel

Panel Characteristics

Panel Type “LG LM170E01-A5” Type “TFT ACTIVE MATRIX Active Size 337.9 (H) x 270.3 (V) Pixel Arrangement RGB Vertical Stripe Pixel Pitch 0.264 mm Glass Treatment Anti Glare (Hard coating 3H) # of Backlights 4 CCFL edge-light (2 top / 2 bottom) Backlight Life 50,000 Hours (minimum) Panel Performance Luminance – Condition:

250 cd/m 200 cd/m2 (minimum after 30-minute warm-up)

(typ. after 30-minute warm-up)

CT = 6500K, Contrast = Max, Brightness = Max Brightness Uniformity ∆L5=Max 1.3 ∆L5= Maximum Luminance/

Minimum Luminance Contrast Ratio 450:1 (typ.), 300:1 (minimum) Color Depth 16 Million colors (8 bit panel) Viewing Angle (Horizontal) 140 degrees @ CR>10, 160 degrees @ CR>5 Viewing Angle (Vertical) 120 degrees @ CR>10, 140 degrees @ CR>5 Response Time 10%-90% @ Ta=25°C

16 ms (Tr= 2 ms, Tf = 14 ms) (typ.)

30 ms (Tr= 6 ms, Tf = 24 ms) (maximum)

Note: The 2nd source of LCD panel is “AU M170EN05.”

7. Mechanical

Dimensions

Width 378 mm Height 405 mm Depth 177 mm Depth (Head Only) 50 mm Monitor Weight 5.3 kg / 11.66 lbs

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

Ergonomics

Tilt Up

20 DEGREES MINIMUM

Tilt Down -5 degrees

8. Environmental

Environmental Conditions

Operating Temperature 0°C to +40°C Storage Temperature -20°C to +60°C Operating Relative Humidity 20% to 80% 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

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

3. Front Panel Function Control Description

Adjusting the Screen Image

Use the buttons on the front control panel to display and adjust the OnView

controls which display on the screen. The OnView controls are explained at the top of the next page and are defined in “Main Menu Controls” on page10.

MAIN

AUTO IMAGE ADJUST CONTRAST/BRIGHTNESS INPUT SELECT AUDIO MENU COLOR ADJUST INFORMATION MANUAL IMAGE ADJUST SETUP MENU MEMORY RECALL

：EXIT ：SELECT

Speaker Speaker

Main Menu with OnView controls

Front Control Panel shown below

Scrolls through menu options and adjusts the displayed control.

Also a shortcut to display the Contrast adjustment control screen.

Displays the Main Menu or exits the control screen and saves adjustments

Decreases or increases volume

Audio Mute button turns the sound off.

Displays the control screen for the highlighted control.

Also toggles between two controls on some screens.

Also a shortcut to toggle between analog and digital connections.

Power light Green = ON Orange = Power

Saving

Power On/Off

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

Do the following to adjust the screen image:

To display the Main Menu, press button [1].

NOTE:

All OnView menus and adjustment screens disappear automatically after about 15 seconds. This is adjustable through the OSD timeout setting in the setup menu.

To select a control you want to adjust, press ▲ or ▼ to scroll up or down the Main Menu.

After the control is selected, press button [2]. A control screen like the one shown below appears.

The command line at the bottom of the control screen tells what to do next from this screen. You can toggle between control screens, adjust the selected option, or exit the screen.

To adjust the control, press the up ▲ or down ▼ buttons.

To save the adjustments and exit the menu, press button [1]

twice

The following tips may help you optimize your display:

• Adjust your computer's graphic card so that it outputs a video signal 1280 x

1024 @ 60Hz to the LCD display. (Look for instructions on "changing the refresh rate" in your graphic card's 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.)

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

Main Menu Controls

Adjust the menu items shown below by using the up ▲ and down ▼ buttons.

Control Explanation

Auto Image Adjust

sizes and centers the screen image

automatically.

Contrast

adjusts the difference between the image background

(black level) and the foreground (white level).

Brightness

Input Select

adjusts background black level of the screen image.

toggles between inputs if you have more than one

computer.

Audio Adjust

Volume

increases the volume, decreases the volume, and

mutes the audio.

temporarily silences audio output.

Mute

Color Adjust

color temperatures and green (G), and blue (B) separately. The factory setting for this product is 6500K (6500 Kelvin).

provides several color adjustment modes: preset

RGB

which allows you to adjust red (R),

Color Adjust

sRGB

9300K

˙6500K

5400K 5000K

User Color

1:EXIT 2:SELECT

sRGB

— sRGB 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

in most office settings with fluorescent lighting).

6500K

richer red.

5400K

ViewSonic Corporation Confidential

5000K

color.

— Adds blue to the screen image for cooler white (used

— Adds red to the screen image for warmer white and

— Adds green to the screen image for a darker color. — Adds blue and green to the screen image for a darker

Do Not Copy VG710b/s-1

Control Explanation

User Color

and blue (B)

To select color (R, G or B) press button [2].

To adjust selected color, press ▲ or ▼.

Important

— Individual adjustments for red (R), green (G),

: 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.

Information

displays the timing mode (video signal input) coming from the graphics card in your computer, the LCD model number, the serial number, and the ViewSonic website URL. See your graphic card’s user guide for instructions on changing the resolution and refresh rate (vertical frequency).

NOTE:

VESA 1280 x 1024 @ 60Hz (recommended) means that the resolution is 1280 x 1024 and the refresh rate is 60 Hertz.

Information: H. Frequency: XX kHz V. Frequency: XX Hz Resolution XXXXXXXXX Pixel Clock: XXX MHz

Serial Number: XXXXXXXXXXX Model Number: XXXXXXXXXXX www.ViewSonic.com 1: Exit

Manual Image Adjust Sub-menu

H. Size (Horizontal Size)

H./V. Position (Horizontal/Vertical Position)

adjusts the width of the screen image.

image left or right and up or down.

moves the screen

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

Control Explanation

Fine Tune

sharpens the focus by aligning the text and/or graphic

characters.

NOTE:

Sharpness

Try Auto Image Adjust first.

adjusts the clarity and focus of the screen image.

Setup menu displays the menu shown below:

Setup Menu

Language Select

Resolution Notice

OSD Position

OSD Time Out

OSD Background On/Off

1: Exit 2: Select

Language

allows you to choose the language used in the menus

and control screens.

Resolution Notice

˙On ˙Off

1: Exit

allows you to enable or disable this notice.

If you enable the Resolution Notice shown above and your computer is set at a resolution other than 1280 x 1024, the following screen appears.

Resolution Notice

For best picture quality, change the resolution to 1280 x 1024

Press "1" to Clear Message. Press "2" to Disable Message.

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

Control Explanation

OSD Position

and control screens.

OSD Timeout

screen is displayed. For example, with a “30 second” setting, if a control is not pushed within 30 seconds, the display screen disappears.

OSD Background

background On or Off.

Memory Recall

if the display is operating in a factory Preset Timing Mode listed in the Specifications of this manual.

Hot Keys for Function Controls

Buttons: Functions:

[Up] + [Down] arrows recall Contrast or Brightness while in the Contrast

[Volume-] + [Volume+] recall volume to 50% while in volume adjustment,

[1] + [2] toggle 720x400 and 640x400 mode when input

[1] + [Up] + [Down] White Balance. White Balance should set the screen

[1] + [Down] (hold for 10 seconds) Power Lock (Unlock). User won’t be able to turn off

[1] + [Up] (hold for 10 seconds) OSD Lock (Unlock). It will lock all functions,

[Up] + [Down] + [Power On] with signal

(hold for 3 seconds)

[Up] + [Down] + [Power On]

without signal

(hold for 3 seconds)

allows you to move the on-screen display menus

sets the length of time the on-screen display

On/Off

allows you to turn the On-Screen Display

returns the adjustments back to factory settings

or Brightness adjustment, or recall both of Contrast and Brightness when the OSD is not on.

or when OSD is not on.

720x400 or 640x400 mode.

on the pure black and white pattern with 640*480@60Hz resolution.

the monitor.

including “Volume” and “Mute”. All Mode Reset. It will erase all end users’ settings and restore the factory defaults. Burn in Mode. After entering Burn in Mode, press

[1] button, you can find the information about this monitor.

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

4. Circuit Description

1. Power s»(D C/DC Converter)

The AP1501 is monolithic IC designed for M/B DC/DC converter, with the ability of driving a 3A load without any

additional transistor component.

The AP1501 operates at a switching frequency of 150 kHz and thus allows smaller-sized filter components than

would be needed with lower frequency switch regulator.

2. Flash Memory

The Pm39LV010R is a 1 Megabit, 3.3 Volt-only Flash Memory organized as 131,072 bytes of 8 bits each. This device is

designed to use a 3.0 Volt to 3.6 Volt power supply to perform in-system programming.

The 1 Megabit memory array is divided into thirty-two uniform blocks of 4 Kbytes each for data and/or code storage.

The block architecture allows users to flexibly make chip erase or block erase operation. The block erase feature allows a

particular block to be erased and reprogrammed without affecting the data in other blocks. After the device performs chip

erase or block erase operation, it can be reprogrammed on a byte-by-byte basis.

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

3. GM5120

The gm5110/20 is a graphic processing IC for Liquid Crystal Display (LCD) monitors at XGA/SXGA resolution. It

provides all key IC functions required for the highest quality LCD monitors. On-chip functions include a high-speed

triple-ADC and PLL, Ultra-Reliable DVI

receiver, a high quality zoom and shrink scaling engine, an on-screen display

(OSD) controller, digital color controls and an on-chip microcontroller (OCM). With this level of integration, the

gm5110/20 devices simplify and reduce the cost of LCD monitors while maintaining a high-degree of flexibility and

quality.

gm5110/5120 System Design Example

4. LVDS (THC63LVDM83A)

The THC63LVDM83A transmitter converts 28 bits of CMOS/TTL data into LVDS (Low Voltage Differential Signaling)

data stream. A phase-locked transmit clock is transmitted in parallel with the data streams over a fifth LVDS link. The

HC63LVDM83A can be programmed for rising edge or falling edge clocks through a dedicated pin. The THC63LVDF84A

receiver converts the LVDS data streams back into 28 bits of CMOS/TTL data with falling edge clock. At a transmit clock

frequency of 85MHz, 24 bits of RGB data and 4 bits of LCD timing and control data (HSYNC, VSYNC, CNTL1, CNTL2)

are transmitted at a rate of 595 Mbps per LVDS data channel.

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

5. Adjusting Procedure

1. Function Test

1.1 Product



- 17” LCD Monitor

1.2 Test Equipment

- Color Video Signal & Pattern (or PC with SXGA resolution and a sound card)

1.3 Test Condition

Before function test and alignment, each LCD Monitor should be warmed up for at least 30 minutes with the

following conditions:

(a) In room temperature,

(b) With full-white screen, RGB, and Black

640*480 (H=43.27kHz, V=85Hz)

800*600 (H=53.7kHz, V=85Hz)

1024*768 (H=68.67kHz, V=85Hz)

1280*1024 (H=79.97kHz, V=75Hz)

1.4 Test Display Modes & Pattern

1.4.1 Compatible Modes

Analog Digital

1. 640 x 350 @ 70Hz, 31.5kHz

2. 640 x 480 @ 60Hz, 31.5kHz

3. 640 x 480 @ 67Hz, 35.0kHz

4. 640 x 480 @ 75Hz, 37.5kHz

5. 640 x 480 @ 72Hz, 37.9kHz

6. 640 x 480 @ 85Hz, 43.27kHz

7. 720 x 400 @ 70Hz, 31.5kHz

8. 800 x 600 @ 56Hz, 35.1kHz

9. 800 x 600 @ 60Hz, 37.9kHz

10. 800 x 600 @ 75Hz, 46.9kHz

11. 800 x 600 @ 72Hz, 48.1kHz

12. 800 x 600 @ 85Hz, 53.7kHz

13. 832 x 624 @ 75Hz, 49.7kHz

14. 1024 x 768 @ 60Hz, 48.4kHz

15. 1024 x 768 @ 70Hz, 56.5kHz

16. 1024 x 768 @ 72Hz, 58.1kHz

17. 1024 x 768 @ 75Hz, 60.0kHz

18. 1024 x 768 @ 85Hz, 68.67kHz

19. 1280 x 1024 @ 60Hz, 63.4kHz

20. 1280 x 1024 @ 75Hz, 79.97kHz

640 x 350 @ 70Hz, 31.5kHz 640 x 400 @ 60Hz, 31.5kHz 640 x 480 @ 60Hz, 31.5kHz 640 x 480 @ 75Hz, 37.5kHz 640 x 480 @ 72Hz, 37.9kHz 640 x 480 @ 85Hz, 43.27kHz 720 x 400 @ 70Hz, 31.5kHz 800 x 600 @ 56Hz, 35.1kHz 800 x 600 @ 60Hz, 37.9kHz 800 x 600 @ 75Hz, 46.9kHz 800 x 600 @ 72Hz, 48.1kHz 800 x 600 @ 85Hz, 53.7kHz 1024 x 768 @ 60Hz, 48.4kHz 1024 x 768 @ 70Hz, 56.5kHz 1024 x 768 @ 72Hz, 58.1kHz 1024 x 768 @ 75Hz, 60.0kHz 1024 x 768 @ 85Hz, 68.67kHz 1280 x 1024 @ 60Hz, 63.4kHz

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

1.4.2 Function Test Display Pattern

Item Test Content Pattern Specification Remark

1 Frequency & Tracking Fine Line Moire Eliminate visual wavy noise. Figure 1 2 Contrast/Brightness 16 Gray Scale 16 gray levels should be

Figure 2

distinguishable.

3 Boundary Horizontal & Vertical

Thickness

Horizontal and Vertical position of video should be adjustable to be

Figure 3

within the screen frame.

4 RGB Color Performance RGB Color Intensities Contrast of each R, G, B, color

Figure 4, 5, 6

should be normal. 5 Screen Uniformity & Flicker Full White Should be compliant with the spec. Figure 7 6 Dead Pixel/Line White Screen & Dark Screen The numbers of dead pixels should

Figure 7, 8

be compliant with the spec. 7 White Balance White & Black Pattern The screen must have the pure white

Figure 9

and black pattern, no other color.

Fine Line Morie Pattern (Figure1) Gray Scale Pattern (Figure2)

Horizontal & Vertical Thickness Pattern (Figure 3) R. Color Pattern (Figure 4)

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

G. Color Pattern (Figure5) B. Color Pattern (Figure 6)

Full White Pattern (Figure 7) Dark Screen Pattern (Figure 8)

Black-White Pattern (Figure 9)

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

1.5 Function Test and Alignment Procedure

1.5.1 All Modes Reset

You should do “All Mode Reset” (Refer to Chapter III-3. Hot Keys for Function Controls) first. This action will allow you

to erase all end-user’s settings and restore the factory defaults.

1.5.2 Auto Image Adjust

Please select and enter “Auto Image Adjust” function on Main Menu to see if it is workable. The “Auto Image Ad just”

function is aimed to offer a better screen quality by built-in ASIC. For optimum screen quality, the user has to adjust each

function manually.

1.5.3 Firmware

Test Pattern: Burn In Mode (Refer to Chapter III-3. Hot Keys for Function Controls)

- Make sure the F/W is the latest version.

1.5.4 DDC

Test Pattern: EDID program

- Make sure it can pass test program.

1.5.5 Fine Tune and Sharpness

Test Signal: 1280*1024@60Hz

Test Pattern: Line Moire Pattern

- Check and see if the image has noise and focus performs well. Eliminate visual line bar.

- If not, readjust by the following steps:

(a) Select and enter “Fine Tune” function on “Manual Image Adjust” to adjust the image to eliminate visual wavy noise. (b) Then, select and enter “Sharpness” function to adjust the clarity and focus of the screen image.

1.5.6 Boundary

Test Signal: 1280*1024@60Hz

Test Pattern: Horizontal & Vertical Line Thickness Pattern

- Check and see if the image boundary is within the screen frame.

- If not, readjust by the following steps:

(a) Select and enter “Manual Image Adjust” function on OSD Main Menu. (b) Then, select and enter “Horizontal Size” or “Horizontal/Vertical Position” function to adjust the video boundary to

be full scanned and within screen frame.

1.5.7 White Balance

Test Signal: 640*480@60Hz

Test Pattern: White and Black Pattern

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

1.5.8 R, G, B, Colors Contrast

Test Signal: 1280*1024@60Hz

Test Pattern: R, G, B, Color Intensities Pattern and 16 Gray Scale Pattern

- Check and see if each color is normal and distinguishable.

- If not, please return the unit to repair area.

1.5.9 Screen Uniformity and Flicker

Test Signal: 1280*1024@60Hz

Test Pattern: Full White Pattern

- Check and see if it is in normal condition.

1.5.10 Dead Pixel and Line

Test Signal: 1280*1024@60Hz

Test Pattern: Dark and White Screen Pattern

- Check and see if there are dead pixels on LCD panel with shadow gauge and filter film.

- The total numbers and distance of dead pixels should be compliant with the spec.

1.5.11 Mura

Test Pattern: White, RGB, Black, & Grey

Test Tool: 10% ND Filter

- Check if the Mura can pass 10% ND Filter.

1.5.12 Audio

Test Signal: Voice signal (optional, depend on model)

Test Pattern: liberty

- Make sure there is audio output.

- Make sure that audio function (volume 80%) is working without noise and resonance.≦

- Make sure that the sound of right and left speakers are in balance.

1.5.13 Check for Secondary Display Modes

Test Signal:

Analog: 640*350@70Hz; 640*480@60/67/72/75/85Hz;

720*400@70Hz; 800*600@56/60/72/75/85Hz;

832*624@75Hz, 1024*768@60/70/72/75/85Hz;

1280*1024@60/75Hz

Digital: 640*350@70Hz; 640*480@60/72/75/85Hz;

720*400@70Hz; 800*600@56/60/72/75/85Hz;

1024*768@60/70/72/75/85Hz; 1152*870@75Hz,

1280*720@60Hz, 1280*1024@60Hz

- Normally when the primary mode 1280*1024@60Hz is well adjusted and compliant with the specification, the

secondary display modes will also be compliant with the spec. But we still have to check with the general test pattern

to make sure every secondary is compliant with the specification.

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

1.5.14 All Modes Reset

After final QC step, we have to erase all saved changes again and restore the factory defaults. You should do “All Mode

Reset” again.

1.5.15 Power Off Monitor

Turn off the monitor by pressing “Power” button.

2. Firmware Upgrade Procedure

When you receive the returned monitor, please check whether the firmware version is the latest. If not, please do the following procedures to upgrade it to the latest version.

2.1 Equipment Needed

- VG710 Monitor

- Fixture for Firmware Upgrade

- Power Adapter (P/N: 47.58201.001) *1 for Fixture

- VGA Cable (P/N: 42.59901.003) *1(Pin 4, 11 should be connected to GND)

- PC (Personal Computer)

- LPT Cable (P/N: 42.59906.001) *1

- Firmware Upgrade Program

- One additional monitor for checking the program execution

Printer Port

PC VG710

Fixture

ViewSonic Corporation Confidential

Do Not Copy VG710b/s-1

+ 53 hidden pages

Viewsonic VG710bs Service Manual 1b

Specifications and Main Features

Frequently Asked Questions

User Manual