ViewSonic VG910s, VG910b, VLCDS27944-3W, VLCDS27944-4W Service manual

Service Manual

ViewSonic VG910s/b-1

Model No. VLCDS27944-3W/-4W

19” Color TFT LCD Display

ViewSonic

(VG910s/b_SM_721 Rev. 1a Mar. 2004)



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

Copyright 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 Date Description Of Changes Approval

1a 03/03/04 Initial Release DCN-3605 Angela Luh

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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

13 19

20 23

29 47 51 52

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1. Precautions and Safety Notices

Prior to using this manual, please ensure that you have carefully followed all the procedures outlined in the

user manual for this product.

• Read all of these instructions.

• Save these instructions for later use.

• Follow all warnings and instructions marked on the product.

• Do not use this product near water.

• This display should be installed on a solid horizontal base.

• When cleaning, use only a neutral detergent cleaner with a soft damp cloth. Do not spray with liquid or

aerosol cleaners.

• Do not expose this display to direct sunlight or heat. Hot air may cause damage to the cabinet and other

parts.

• Adequate ventilation must be maintained to ensure reliable and continued operation and to protect the

display from overheating. Do not block ventilation slots and openings with objects or install the display

in a place where ventilation may be hindered.

• Do not install this display near a motor or transformer where strong magnetism is generated. Images on

the display will become distorted and the color irregular.

• Do not allow metal pieces or objects of any kind fall into the display from ventilation holes.

Slots and openings in the cabinet and the back or bottom are provided for ventilation, to ensure reliable

operation of the product and to protect it from overheating, those openings must not be blocked or covered.

The openings should never be blocked by placing the product on a bed, sofa, rug, or other similar surface.

This product should never be placed near or over a radiator or heat register. This product should not be

placed in a built-in installation unless proper ventilation is provided.

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2. Specification

2.1 General Description

LCD Fujitsu FLC48SXC11V AU M190EN02V2

Active matrix thin-film-transistor (TFT) Type No: FLC48SXC11V/M190EN02V2 Active screen Size Effective Display Size Pixel Pitch Pixel Format Brightness Contrast Ratio Color (8 bits) Viewing Angle range

(CR≧10, at Ta=25°C)

19.0 inches diagonal

376.32mm (H) × 301.056mm (V)

0.294mm (H) × 0.294mm(V) 1280×1024 (SXGA ) 250cd/m

600:1 (Typ.) 16,777,216 colors Up 85° Down 85°(type) Left 85° Right 85°(type)

Backlight

4 CCFL

Input Signals

Analog RGB 0.7Vp-p / 75Ω

Digital RGB DVI Ver1.0 (TMDS Single Link)

H/V Separate sync. Sync 2.0~5.0Vp-p, Positive/Negative, 2.2KΩ

Input connector Analog D-sub 15 pin *1

Digital DVI-D 24pin *1

Synchronization Horizontal

Vertical Non-interlaced

30 kHz to 82 kHz

50 Hz to 85 Hz

Maximum Pixel Rated 135MHz

Resolution Horizontal

Vertical

Active Display Area Horizontal

Vertical Power Supply Voltage Rating AC Power Consumption

AC input

DC 12V

less than 60W

less than 1W

1280 dots 1024 lines

376.32 mm (typical, panel depends)

301.056 mm (typical, panel depends) AC 100V~240V / 2A, 47.5~63Hz 5A. On mode. Active OFF mode. DC Power OFF.

Current Rating AC input 2A @AC 100~240V.

Net Dimensions

Gross

Depth(head only) Weight

Environmental Conditions

Net

Gross

Operating Temperature

Operating Humidity

Storage Temperature

Storage Humidity Accessories AC cable

User Guide

CD Rom

Warranty Card

HD15 - HD15 cable

DVI(D) - DVI(D) cable

422.4(W) x 382.1(H) x62.0 (D) mm

422.4(W) x 438.48(H) x 180.56(D) mm (With stand base)

180.56mm

7.5 Kg

10.2 Kg

0 to 40°C 20 to 85%

-20 to 60°C 5 to 85% (non-condensation)

1.8m English 1 1 1 1

(Ty

p. )

(automatically) (automatically)

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Regulatory Standards UL, cUL, FCC-B, CB, CE, EPA, NOM, TUV/GS, TUV ERGO (covers ISO13406-2 &

MPRII), NEMKO, SEMKO, DEMKO, FIMKO, GOST-R + 20 ORIGINAL COPIES

HYGIENIC, PCBC, VCCI, BSMI, CCEE, PSB,C-TICK, TUV-S, TCO'99(VG910b),

TCO'03(VG910s), Energy, Energy Star, PCT, Taiwan Green Mark

Others Tilt Angle 20° up / 5° down

VESA DDC 2B compatible

2.2 Electrical Characteristics

2.2.1 Power Supply

AC Input Voltage AC 100~240V / 47.5~63Hz

Power Consumption：

Less than 60W On mode

Less than 1W Active Off mode

Less than 1W DC power Off

Current Rating 2A @ AC 100~240V

Inrush Current

Less than 50 Amp(peak) for 120 VAC

Less than 100 Amp(peak) for 220 VAC

Power cord：detachable, 3P, 1.8m

2.2.2 LCD

LCD Active matrix thin-film-transistor (TFT)

Active screen size 19.0 inches (376.32mm × 301.056mm) diagonal

Pixel Format 1280 x 1024 (SXGA )

R.G.B. stripe arrangement

Display method TFT, normally Black

Pixel pitch 0.294 (H) x 0.294 (V) mm

Dot number 1280 x 1024 x 3 dots

Backlight Edge-lighting type with 4 CCFL

(Cold Cathode Fluorescent Lamp)

Brightness 250 cd/m

Contrast ratio 600:1 (Typ.

(Typ.)

)

Display color 16,777,216 colors

viewing angle typical Up 85° / down 85° / right 85° / left 85°

(Contrast ratio≧10 at Ta=25°C / 77°F)

Response time Rise time 15mS, Fall time 10mS (Typ. at Ta=25°C)

2.2.3 Power Management

VG910 will enter power saving mode under the following conditions:

Power Management condition and status in AC 240V

State

Signals

Horizontal Vertical Video

Power

Supply

On Pulses Pulses Active <60W Green

Active off

Pulse No Pulse

No Pulse Pulse

Blank

<1W

No Pulses No Pulses

Out off scan range

<30KHz ,

>82KHz

<50Hz ,

>85Hz

<60W

LED

Amber

Green

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AC power Off - - - Off Off

DC power Off - - - <1W Off

2.3 Video alignment

2.3.1 COLOR TEMPERATURE ALLIGMENT

a. APPLY VESA 1280x1024 / 60Hz , FULL WHITE PATTERN.( INPUT SIGNAL LEVEL

=0.7Vp-p )

b. AUTO WHITE BANLANCE MUST BE FINISH AT 32 GRAY PATTERN BEFORE AUTO

ALIGNMENT,

c. SET DEFAULT Æ CONTRAST TO 70% , BRIGHTNESS TO 100%

9300°K, 6500°K,：R G B SUB-BRIGHTNESS SET AS BELOW

R SUB-BRIGHTNESS 128 128 128 128

G SUB-BRIGHTNESS 128 128 128 128

B SUB-BRIGHTNESS 128 128 128 128

SET BRIGHTNESS = 255, BLACKLEVEL = 255 AT FACTORY DEFAULT.

2.3.2 DIGITAL ALIGNMENT

2.3.2.1 APPLY VESA 1280x1024 / 60Hz , FULL WHITE PATTERN ,

2.3.2.2 ADJUST R, G, B SUB-CONTRAST TO MEET FOLLOWING CHROMATICITY

SPEC.

x = 0.313 ±0.003 , y = 0.329 ±0.003

2.3.3 ANALOG ALIGNMENT

2.3.3.1 9300°K HIGH LUMINANCE ALIGNMENT

2.3.3.1.1 APPLY VESA 1280x1024 / 60Hz , FULL WHITE PATTERN.

2.3.3.1.2 ADJUST R, G, B SUB-CONTRAST TO MEET FOLLOWING

2.3.3.2 6500°K HIGH LUMINANCE ALIGNMENT

2.3.3.2.1 APPLY VESA 1280x1024 / 60Hz , FULL WHITE PATTERN.

2.3.3.2.2 ADJUST R, G, B SUB-CONTRAST TO MEET FOLLOWING

2.3.3.3 5400°K HIGH LUMINANCE ALIGNMENT

2.3.3.3.1 APPLY VESA 1280x1024 / 60Hz , FULL WHITE PATTERN.

2.3.3.3.2 ADJUST R, G, B SUB-CONTRAST TO MEET FOLLOWING

9300°K 6500°K 5400°K 5000°K

CHROMATICITY SPEC.

9300°K → x = 0.283 ±0.003, y = 0.298 ±0.003 , Y > 155 cd/m

CHROMATICITY SPEC.

6500°K → x = 0.313±0.003, y = 0.329 ±0.003 , Y > 190 cd/m

CHROMATICITY SPEC.

5400°K → x = 0.335 ±0.003, y = 0.350 ± 0.003 , Y > 180cd/m

2.3.3.4 5000°K HIGH LUMINANCE ALIGNMENT

2.3.3.4.1 APPLY VESA 1280x1024 / 60Hz , FULL WHITE PATTERN.

2.3.3.4.2 ADJUST R, G, B SUB-CONTRAST TO MEET FOLLOWING

CHROMATICITY SPEC.

5000°K → x = 0.346 ±0.003, y = 0.359 ±0.003 , Y > 180cd/m

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2.3.4 LUMINANCE TEST

2.3.4.1 SET COLOR Temperature TO 9300°K

APPLY VESA 1280x1024/60Hz , APPLY FULL WHITE PATTERN, ADJUST

OSD BRIGHTNESS = 100%, CONTRAST = 70%.

1. THE LUMINANCE MEASURE SHOULD BE OVER 155cd/m

2.3.4.2 SET COLOR Temperature TO 6500°K

APPLY VESA 1280x1024 / 60Hz , APPLY FULL WHITE PATTERN, ADJUST

OSD BRIGHTNESS = 100%, CONTRAST = 70%

1. THE BRIGHTNESS MEASURE SHOULD BE OVER 190cd/m

2. SET BRIGHTNESS =100% , CONTRAST=100% ,THE LUMINANCE

2.3.4.3 SET COLOR Temperature TO 5400°K

APPLY VESA 1280x1024 / 60Hz , APPLY FULL WHITE PATTERN, ADJUST

OSD BRIGHTNESS = 100%, CONTRAST = 70%

1. THE BRIGHTNESS MEASURE SHOULD BE OVER 180cd/m

2.3.4.4 SET COLOR Temperature TO5000°K

APPLY VESA 1280x1024 / 60Hz , APPLY FULL WHITE PATTERN, ADJUST

OSD BRIGHTNESS = 100%, CONTRAST = 70%

1. THE BRIGHTNESS MEASURE SHOULD BE OVER 180 cd/m

2.3.4.5 APPLY VESA 1280x1024/60Hz , APPLY FULL WHITE PATTERN, ADJUST

OSD BRIGHTNESS 100%, CONTRAST 70% ,

MEASURE SHOULD BE OVER 220cd/m

MEASUREMENT AT CENTER OF SCREEN

MODE X y Y

9300°K 0.283±0.010 0.298 ±0.010 6500°K 0.313 ±0.010 0.329 ±0.010 5400°K 0.335 ±0.010 0.350 ±0.010 5000°K 0.346 ±0.010 0.359 ±0.010

OVER 155 cd/m

OVER190 cd/m

OVER 180 cd/m

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2.4 Key function define

Key

“Vol -”

○

Key

“Vol +”

○ ○

Key “1”

○

○ ○

○

○ ○

Key

“DOWN

”

○

Key

“UP”

○ ○ ○

○

Key “2” power functions

○ ○

○

Factory mode

Burn in off

Burn in on

All mode recall

Lock(Unlock)

Power Key

Lock(Unlock)

Osd Key

Read EDID

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2.5 EDID SERIAL NO. FORMAT

2.5.1 EDID for VG910s

2.5.1.1 Analog EDID

128 BYTES OF EDID CODE:

0 1 2 3 4 5 6 7 8 9

0 00 FF FF FF FF FF FF 00 5A 63

10 18 DA 01 01 01 01 01 0D 01 03

20 0E 26 1E 78 2E 5E 35 A4 59 4A

30 98 25 10 50 54 BF EF 80 81 80

40 81 40 71 4F 01 01 01 01 01 01

50 01 01 01 01 30 2A 00 98 51 00

60 2A 40 30 70 13 00 78 2D 11 00

70 00 1E 00 00 00 FF 00 41 33 31

80 30 33 30 31 30 30 30 30 31 0A

90 00 00 00 FD 00 32 4B 1E 52 0E

100 00 0A 20 20 20 20 20 20 00 00

110 00 FC 00 56 47 39 31 30 73 0A

120 20 20 20 20 20 20 00 7B

2.5.1.2 Digital EDID

128 BYTES OF EDID CODE:

0 1 2 3 4 5 6 7 8 9

0 00 FF FF FF FF FF FF 00 5A 63

10 18 DA 01 01 01 01 01 0D 01 03

20 80 26 1E 78 2E 5E 35 A4 59 4A

30 98 25 10 50 54 BF EF 80 81 80

40 81 40 71 4F 31 0A 01 01 01 01

50 01 01 01 01 30 2A 00 98 51 00

60 2A 40 30 70 13 00 78 2D 11 00

70 00 1E 00 00 00 FF 00 41 33 31

80 30 33 30 31 30 30 30 30 31 0A

90 00 00 00 FD 00 32 4B 1E 52 0E

100 00 0A 20 20 20 20 20 20 00 00

110 00 FC 00 56 47 39 31 30 73 0A

120 20 20 20 20 20 20 00 D0

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2.5.2 EDID for VG910b

2.5.2.1 Analog EDID

128 BYTES OF EDID CODE:

2.5.2.2 Digital EDID

128 BYTES OF EDID CODE:

0 1 2 3 4 5 6 7 8 9

0 00 FF FF FF FF FF FF 00 5A 63

10 18 DB 01 01 01 01 01 0D 01 03

20 0E 26 1E 78 2E 5E 35 A4 59 4A

30 98 25 10 50 54 BF EF 80 81 80

40 81 40 71 4F 01 01 01 01 01 01

50 01 01 01 01 30 2A 00 98 51 00

60 2A 40 30 70 13 00 78 2D 11 00

70 00 1E 00 00 00 FF 00 41 33 32

80 30 33 30 31 30 30 30 30 31 0A

90 00 00 00 FD 00 32 4B 1E 52 0E

100 00 0A 20 20 20 20 20 20 00 00

110 00 FC 00 56 47 39 31 30 62 0A

120 20 20 20 20 20 20 00 8A

0 1 2 3 4 5 6 7 8 9

0 00 FF FF FF FF FF FF 00 5A 63

10 18 DB 01 01 01 01 01 0D 01 03

20 80 26 1E 78 2E 5E 35 A4 59 4A

30 98 25 10 50 54 BF EF 80 81 80

40 81 40 71 4F 31 0A 01 01 01 01

50 01 01 01 01 30 2A 00 98 51 00

60 2A 40 30 70 13 00 78 2D 11 00

70 00 1E 00 00 00 FF 00 41 33 32

80 30 33 30 31 30 30 30 30 31 0A

90 00 00 00 FD 00 32 4B 1E 52 0E

100 00 0A 20 20 20 20 20 20 00 00

110 00 FC 00 56 47 39 31 30 62 0A

120 20 20 20 20 20 20 00 DF

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APPENDIX A : PRESET TIMING CHART

Analog Mode

1 2 3 4 5 6 7

Signal name

H-frequency (kHz) 31.468 31.469 31.468 35.001 37.5 37.862 43.269

V-frequency (Hz)

Pixel rate (MHz)

H-sync Ths

H-back porch Thb

Count num (H-total) Thd

H- front porch Thf

V-sync Tvs

V-back porch Tvb

Count num (V-total) Tvd

V-front porch Tvf

H-sync. Polarity

V-sync Polarity

H-resolution (dots)

V-resolution (lines)

8 9 10 11 12 13 14

Signal name Symbol

H-frequency (kHz) 35.156 37.879 48.077 46.875 53.674 49.725 48.363

V-frequency (Hz) 56.250 60.317 72.188 75.000 85.061 74.5 60.004

Pixel rate (MHz) 36.000 40.000 50.000 49.500 56.250 57.283 65.000

H-sync Ths 72 128 120 80 64 64 136

H-back porch Thb 128 88 64 160 152 224 160

Count num (H-total) Thd 1024 1056 1040 1056 1048 1152 1344

H- front porch Thf 24 40 56 16 32 32 24

V-sync Tvs 2 4 6 3 3 3 6

V-back porch Tvb 22 23 23 21 27 39 29

Count num (V-total) Tvd 625 628 666 625 631 667 806

V-front porch Tvf 1 1 37 1 1 1 3

H-sync. Polarity Negative Positive Positive Positive Positive Negative Negative

V-sync Polarity Negative Positive Positive Positive Positive Negative Negative

H-resolution (dots) 800 800 800 800 800 832 1024

V-resolution (lines) 600 600 600 600 600 624 768

symbol

TEXT

mode

70.087 70.087 59.941 66.667 75 72.807 85.005

25.175 28.322 25.175 30.240 31.5 31.501 36.000

96 108 96 64 64 40 56

48 54 48 96 120 128 80

800 900 800 864 840 832 832

16 18 16 64 16 24 56

2 2 2 3 3 3 3

60 35 33 39 16 28 25

449 449 525 525 500 520 509

37 12 10 3 1 9 1

Positive Negative Negative Negative Negative Negative Negative

Negative Positive Negative Negative Negative Negative Negative

640 720 640 640 640 640 640

350 400 480 480 480 480 480

IBM-8514

TEXT

mode

SVGA SVGA SVGA SVGA MAC 16" XGA

VGA MAC-II VESA-VGA VESA-VGA VESA-VGA

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15 16 17 18 19 20 21

Signal name Symbol XGA XGA XGA XGA SXGA 720P SXGA

H-frequency (kHz) 56.476 58.099 60.023 68.677 63.981 45.000 79.976

V-frequency (Hz) 70.069 72.082 75.029 84.997 60.02 60.00 75.025

Pixel rate (MHz) 75.000 78.084 78.750 94.500 108 74.250 135

H-sync Ths 136 136 96 96 112 40 144

H-back porch Thb 144 160 176 208 248 270 248

Count num

(H-total)

H- front porch Thf 24 24 16 48 48 60 16

V-sync Tvs 6 6 3 3 3 5 3

V-back porch Tvb 29 29 28 36 38 20 38

Count num

(V-total)

V-front porch Tvf 3 3 1 1 1 5 1

H-sync. Polarity Negative Negative Positive Positive Positive Negative Positive

V-sync Polarity Negative Negative Positive Positive Positive Negative Positive

H-resolution (dots) 1024 1024 1024 1024 1280 1280 1280

V-resolution (lines) 768 768 768 768 1024 720 1024

Notes: Because this model no support FRC and in order to meet the panel spec of vertical frequency,

some timing can not full screen in vertical size.

Ex:640x400/70Hz;640x350/70Hz ;720x400/70Hz ;640x480/85Hz;800x600/85Hz;

1024x768/85Hz.

Thd 1328 1344 1312 1376 1688 1658 1688

Tvd 806 806 800 808 1066 750 1066

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Digital Mode

1 2 3 4 5 6 7

Signal name symbol TEXT

mode

H-frequency (kHz) 31.468 31.469 31.468 31.468 37.5 37.862 43.269

V-frequency (Hz) 70.087 70.087 70.000 59.941 75 72.807 85.005

Pixel rate (MHz) 25.175 28.322 25.175 25.175 31.5 31.501 36.000

H-sync Ths 96 108 96 96 64 40 56

H-back porch Thb 48 54 48 48 120 128 80

Count num (H-total) Thd 800 900 800 800 840 832 832

H- front porch Thf 16 18 16 16 16 24 56

V-sync Tvs 2 2 2 2 3 3 3

V-back porch Tvb 60 35 35 33 16 28 25

Count num (V-total) Tvd 449 449 449 525 500 520 509

V-front porch Tvf 37 12 10 6 1 9 1

H-sync. Polarity Positive Negative Negative Negative Negative Negative Negative

V-sync Polarity Negative Positive Negative Negative Negative Negative Negative

H-resolution (dots) 640 720 640 640 640 640 640

V-resolution (lines) 350 400 400 480 480 480 480

8 9 10 11 12 13 14

Signal name Symbol IBM-8514A SVGA SVGA SVGA SVGA XGA XGA

TEXT

mode

VGA VGA VESA-VGA VESA-VGA VESA-VGA

H-frequency (kHz) 35.156 37.879 48.077 46.875 53.674 48.363 56.476

V-frequency (Hz) 56.250 60.317 72.188 75.000 85.061 60.004 70.069

Pixel rate (MHz) 36.000 40.000 50.000 49.500 56.250 65.000 75.000

H-sync Ths 72 128 120 80 64 136 136

H-back porch Thb 128 88 64 160 152 160 144

Count num (H-total) Thd 1024 1056 1040 1056 1048 1344 1328

H- front porch Thf 24 40 56 16 32 24 24

V-sync Tvs 2 4 6 3 3 6 6

V-back porch Tvb 22 23 23 21 27 29 29

Count num (V-total) Tvd 625 628 666 625 631 806 806

V-front porch Tvf 1 1 37 1 1 3 3

H-sync. Polarity Negative Positive Positive Positive Positive Negative Negative

V-sync Polarity Negative Positive Positive Positive Positive Negative Negative

H-resolution (dots) 800 800 800 800 800 1024 1024

V-resolution (lines) 600 600 600 600 600 768 768

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15 16 17 18 19

Signal name Symbol XGA XGA XGA SXGA HD-720P

H-frequency (kHz) 58.099 60.023 68.677 63.981 45.000

V-frequency (Hz) 72.082 75.029 84.997 60.02 60.00

Pixel rate (MHz) 78.084 78.750 94.500 108 74.250

H-sync Ths 136 96 96 112 40

H-back porch Thb 160 176 208 248 270

Count num (H-total) Thd 1344 1312 1376 1688 1658

H- front porch Thf 24 16 48 48 60

V-sync Tvs 6 3 3 3 5

V-back porch Tvb 29 28 36 38 20

Count num (V-total) Tvd 806 800 808 1066 750

V-front porch Tvf 3 1 1 1 5

H-sync. Polarity Negative Positive Positive Positive Negative

V-sync Polarity Negative Positive Positive Positive Negative

H-resolution (dots) 1024 1024 1024 1280 1280

V-resolution (lines) 768 768 768 1024 720

Notes: Because this model no support FRC and in order to meet the panel spec of vertical frequency,

some timing can not full screen in vertical size.

Ex:640x400/70Hz;640x350/70Hz ;720x400/70Hz ;640x480/85Hz;800x600/85Hz;

1024x768/85Hz.

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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 page 9.

Main Menu with OnView controls

Front Control Panel shown below

Speaker Speaker

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

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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 30 seconds.

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 ▼down arrow decreases,

▲

up arrow

increases

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

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

The following tips may help you optimize your display:

The line at the bottom of the screen tells you what you can do next: Exit or select the Brightness control.

twice

• Adjust your computer's graphic card so that it outputs a video signal 1280 x 1024 @ 60 Hz 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.)

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Main Menu Controls

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

ControlExplanation

Auto Image Adjust

automatically sizes, centers, and fine tunes

the video signal to eliminate waviness and distortion. Press the [2] button to obtain a sharper image. NOTE: Auto Image Adjust works with most common video

cards. If this function does not work on your LCD display, then lower the video refresh rate to 60 Hz and set the resolution to its pre-set value.

Contrast

adjusts the difference between the image background

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

Brightness

Audio Adjust

adjusts background black level of the screen image.

Volume

increases the volume, decreases the volume, and mutes

the audio.

Balance

speaker.

Bass

Tre bl e

Mute

adjusts the low (bass) frequency audio output.

adjusts the high (treble) frequency audio output.

temporarily silences audio output.

adjusts the proportion of sound coming from each

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ControlExplanation

Color Adjust

color temperatures and

provides several color adjustment modes: preset

RGB

which allows you to adjust red (R), green (G), and blue (B) separately. The factory setting for this product is 6500K (6500 Kelvin).

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

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

in most office settings with fluorescent lighting).

6500K

— Adds red to the screen image for warmer white and

richer red.

5400K

5000K

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

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

color.

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.

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ControlExplanation

Information

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

NOTE:

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

Manual Image Adjust

displays the Manual Image Adjust menu.

The

Manual Image Adjust

Horizontal Position

Vertical Position

Horizontal Size

Fine Tune

sharpens focus by aligning the illuminated text and/

moves the screen image left or right.

moves the screen image up or down.

adjusts the width of the screen image.

or graphic characters.

Sharpness

adjusts the clarity and focus of the screen image.

controls are explained below:

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ControlExplanation

Setup Menu

The

Setup Menu

Language

displays the menu shown below.

controls are explained below:

allows you to choose the language used in the menus

and control screens.

Resolution Notice

below.

displays the Resolution Notice menu shown

Resolution Notice

OSD Position

advises the optimal resolution to use.

allows you to move the on-screen display menus

and control screens.

OSD Timeout

sets the length of time an on-screen display screen is displayed. For example, with a “15 second” setting, if a control is not pushed within 15 seconds, the display screen disappears.

OSD Background

allows you to turn the On-Screen-Display

background on or off.

Memory Recall

returns adjustments to the original factory settings if the display is operating in a factory Preset Timing Mode listed in this user guide.

Exception:

This control does not affect changes made with the

User Color control.

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+ 48 hidden pages

ViewSonic VG910s, VG910b, VLCDS27944-3W, VLCDS27944-4W Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual