ViewSonic VG710B - 17" LCD Monitor Bedienungsanleitung

Model No. VLCDS23719-4W

17” Color TFT LCD Display

Service Manual

ViewSonic VG710b/s1

ViewSonic

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

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

Model No. VLCDS23719-5W

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

ViewSonic is a registered trademark of ViewSonic Corporation.

All other trademarks used within this document are the property of their respective owners.

Optiquest is a registered trademark of ViewSonic Corporation.

Revision History

Revision Date Description Of Changes Approval

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1a 02/26/04 Initial Release DCN-3601 Angela Luh

TABLE OF CONTENTS

2. Specification

3. Front Panel Function Control Description

4. Circuit Description

6. Trouble Shooting Flow Chart

9. Block Diagram

10. Schematic Diagrams

7. Recommended Spare Parts List

1. Precautions and Safety Notices

5. Adjusting Procedure

8. Exploded Diagram And Spare Parts List

11. PCB Layout Diagrams

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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 dustand 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.

1. Precautions and Safety Notices

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(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.”

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 pad.

Placingthe 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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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 1. Video RGB (Analog) Separate Sync

2. TMDS (Digital)

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

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

2. Specification

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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

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

3) The monitor needs to do “Auto Adjust” the first

time a new mode is detected.

Under 5 seconds (Maximum)

1 seconds (Typ.) for recognized timings

1-2 seconds (Typ.) for unrecognized timing

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:

CT = 6500K, Contrast = Max,

Brightness = Max

250 cd/m2(typ. after 30-minute warm-up)

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

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

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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

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