ViewSonic VP201b-1,VP201s-1,VLCDS26064-2W,VLCDS26064-4W Service manual

Service Manual

ViewSonic VP201b/s-1

Model No.

VLCDS26064-2W/-4W

20" Color TFT LCD Display

ViewSonic

(VP201b/s-1_SM_685 Rev. 1d May. 2005)



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.

Revision History

ECR Number

08/28/03

25/03/04

03/09/05

05/19/05

4923

5321

Initial Release

Panel Change LG U04 Panel 16ms DCN-3773

Scalar Change to GM1601

Panel change form: LG U04 Panel 16ms to AUO M201UN02 V3 16ms

Description of Changes

EditorRevision SM Editing Date

F. Fan

A. Lu

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TABLE OF CONTENTS

1. Precautions and Safety Notices

2. Specification

3. Front Panel Function Control Description

4. Circuit Description

5. Adjustment Procedure

6. Troubleshooting Flow Chart

7. Recommended Spare Parts List

8. Exploded Diagram and Spare Parts List

9. Block Diagram

10. Schematic Diagrams

11. PCB Layout Diagrams

40 58 60 61

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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

4.1 Handling Precautions

(1) Since front polarizer is easily damaged, pay attention not to scratch it. (2) Be sure to turn off power supply when 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. Specification

A. General specification:

1. General specification:

LCD panel suppliers: AUO: M201UN02 V.3 LCD panel specification:

Input signals: a. Analog R / G / B (0.7Vp-p/75 ohm) Positive.

Input connector: a. Analog D-sub 15pin x 1.

Output connector: a. USB down stream x 4.(VP201s/b only) Display data channel: DDC2B. Signal frequency range: a. Horizontal:

a. Panel size: 20.1-inch (viewable). b. Driver element: a - Si TFT active matrix. c. Effective display area: 408.0 (H) X 306.0 (V) mm. d. Pixel pitch: 0.255 (H) X 0.255 (V) mm. e. Max. resolution: UXGA (1600X1280 pixel). f. Display color: 16.7M colors (R, G, B 8-bit data).

g. Response time:

LG: 16 ms. (Typical)

AUO: 16 ms (Typical) h. Color filter arrangement: R/G/B vertical stripe. i. Black light: Edge – light type with 6CCFLs.

j. Contrast ratio:

LG: 400:1

AUO: 700:1 k. Luminance: 250cd/m2 (Typical). l. Luminance variation: 1.54 (MAX.). (Note.1) m. Viewing angle (CR >10): Horizontal: 170

b. Digital R /G / B DVI rev. 1.0 (TMDS single link) c. H & V separate Sync: TTL level; Polarity: Positive or Negative. d. H & V composite Sync: TTL level; Polarity: Positive or Negative. e. SOG (Sync level 0.3Vp-p).

b. Digital DVI-I 29 pin x 1. (Analog + Digital) c. USB up stream x1.(VP201s/b only)

a-1. Analog: 30KHz ~ 92KHz. a-2. Digital: 30KHz ~ 92KHz.

b. Vertical: 50Hz ~ 85*

Hz.

, Vertical: 170o.

*Note:

When the resolution is set to 1600x1200, the maximum vertical

refresh rate is: Analog input: 60 Hz. Digital input: 60 Hz. c. Pixel clock:

c-1. Analog: 165MHz. c-2. Digital: 165MHz.

d. Non-interlaced.

Resolution: 1600x1200. (UXGA)

Power supply: AC Input Range:

Less then 50Ap. For 115VAC. Inrush current Less then 100Ap. For 230V

Power Consumption:

Less then 73W. On mode. Less then 4W. Active off mode. Less then 2W. DC power off.

AC 90 to 264V, 50/60Hz ± 3Hz,

1.5A.

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2. Physical specification: Overall dimension:

Mechanical adjustment:

Packaging: a. Carton dimension:

Accessories: Power cable 1.8m.

3. Regulatory & Standard certification. Regulatory standards UL, cUL, FCC-B, CB, CE, ENERGY, NOM, TUV/GS, TUV ERGO (covers

a. Height: 480.55mm. b. Width: 448.00mm. c. Depth: 266.65mm. a. Net weight: 8.5kg. Weight: b. Gross weight: 11.2kg. a. Tilt: +25o ~ -5o. b. Swivel: c. Height adjust: 110mm. d. Pivot: 90

± 45

. a. Height: 494mm. b. Width: 345mm. c. Depth: 560mm.

User guide (English). CD ROM. Warranty card. HD15 - HD15 cable. DVI (D) – DVI (D) cable.

ISO13406-2 & MPRII), TCO’03(for VP201s/VP2000s), TCO99 (for VP201 NEMKO, SEMKO, DEMKO, FIMKO, GOST-R + 20 ORIGINAL COPIES HYGIENIC, (SASO), PCBC, VCCI, BSMI, CCC, (PSB), (C-TICK), TUV-S

Note.1: Luminance variation:

50%90%

L = 408mm / W = 306mm

FIG.1 Luminance test points

10%

50%

90%

BU =

MAX. Luminance in 9 point (1 ~ 9)

1.54

MIN. Luminance in 9 point (1 ~ 9)

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B. OSD Menu Functions

1. Interface board function test.

1.1 Function keys: Power, 1, ▲, ▼, 2.

1.2 Basic function check.

1.2.1 Input 1600x1200 / 60Hz, cross-hatch reverse pattern.

1.2.2 Push “1” & “2” key, select Auto image adjust, Contrast, Brightness, Input select, Color, Manual image adjust, Setup menu, Memory recall function.

1.2.3 Push “▲” or “▼” key check Contrast, Brightness, Input select, Color, H/V position, H size, Fine tune, Sharpness, Scaling Language Select, OSD Position OSD Timeout, OSD Background functions.

1.2.4 Push “2” to cycle among Analog / DVI-A / DVI-D signals.

1.2.5 When the OSD is not active, the “▲ ” and “▼” buttons increase/decrease Contrast or

Brightness.

2. Interface power test.

2.1 The test point:

2.1.1 TP251 = NA.

2.1.2 TP252 = 5V ± 5%.

2.1.3 TP253 = 18V ± 5%.

3. OSD function. Auto Image Adjust

Contrast/Brightness: Contrast, Brightness. Input Select: D-Sub, DVI-A, DVI-D. Color Adjust: SRBG, 9300K, 6500K (default), 5400K, 5000K, User Color (R, G, B). Information: Resolution, Horizontal Frequency, Vertical Frequency, Model Number, Serial Number,

Web Site.

Manual Image Adjust: H. / V. Position

Screen, Fill Aspect Ratio

(H. Position, V. Position), H. Size2, Fine Tune2, Scaling

, 1:1).

Setup Menu:

Language: English, French, German, Spanish, Italian, Finnish, Japanese, Traditional Chinese, Simplified Chinese. Resolution Notice: Enable, Disable. Input Priority: D-Sub, DVI-A, DVI-D, Auto Search. OSD Position: H. Position, V. Position. OSD Timeout: 5SEC, 15SEC, 30SEC, 60SEC OSD Background: On, Off.

Memory Recall

Notes:

These functions are not available in Digital mode; the item is faded out and can’t be

When auto tuning, the image should not go blank.

These functions are not available in 1600x1200 mode; the item is faded out and can’t be

When the input signal’s aspect ratio is 4:3, the “Fill Aspect ratio” function yields the same

result as “Fill Screen”.

(Fill

selected.

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C. Image Calibration

1. Video alignment.

Initial Settings

1.1 Set contrast to 70%

and brightness to 100%.

1.2 Input a 640x480 / 60Hz, 5-block (5-MOSAIC) pattern (input level 100IRE 0.7Vp-p), then activate the White Balance function.

Set SRBG/9300K / 6500K / 5400K / 5000K, R G B Gain as shown below:

sRGB 9300K 6500K 5400K 5000K

Analog DVI Analog DVI Analog DVI Analog DVI Analog DVI R Gain 255 255 255 255 255 255 255 255 255 255 G Gain 255 255 255 255 255 255 255 255 255 255 B Gain 255 255 255 255 255 255 255 255 255 255

2. 9300K alignment:

1.2.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.

1.2.2 Adjust R, G, and B Gain to meet following chromaticity spec: 9300K → x = 0.283 ± 0.005, y = 0.298 ± 0.005, Y > 150cd/m

(Both analog & DVI).

3. 6500K alignment:

1.3.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.

1.3.2 Adjust R, G and B Gain to meet following chromaticity spec: 6500°K → x = 0.313 ±0.005, y = 0.329 ± 0.005, Y > 200cd/m

(Both analog & DVI).

4. 5400K alignment:

1.4.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.

1.4.2 Adjust R, G, and B Gain to meet following chromaticity spec: 5400K → x = 0.335 ± 0.005, y = 0.350 ± 0.005, Y > 180cd/m

(Both analog & DVI).

5. 5000K alignment:

1.5.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.

1.5.2 Adjust R, G and B Gain to meet following chromaticity spec:

6. sRGB alignment:

1.6.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.

1.6.2 Adjust R, G and B Gain to meet following chromaticity spec:

7. 64 grays and 16 grays pattern check:

sRGB → x = 0.313 ±0.005, y = 0.329 ± 0.005, Y > 200cd/m

(Both analog & DVI).

7.1 Input a 1600x1200 / 60Hz, 64 gray-level pattern at 100IRE, with brightness set to 100% and

contrast set to 70%.

7.2 Verify that under the 9300K / 6500K / 5400K / 5000K settings, no more than 2 of the 64

grays are saturated.

7.3 Input a 1600x1200 / 60Hz, 16 gray-level pattern at 100IRE, with brightness set to 100% and

contrast set to 100%.

7.4 Verify that under the 9300K / 6500K / 5400K / 5000K settings, no more than 4 of the 16

grays are saturated.

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D. Image test

1. Picture size & position.

1.1 Picture size. Input analog timing modes 1 ~28 and DVI timing modes 1 ~ 28: H-size: 408mm V-size: 306mm

± 1mm. ± 1mm.

(Extra 640x350)

1.2 Screen center. a. 1600x1200: H ± 1mm, V ± 1mm. b. Other modes: H ± 1.5mm, V ± 1mm.

1.3 Picture position (refer to FIG.2). H-position:

V-position:

︱g3-g4︱ ≦ 1.5mm. ︱g1-g2︱ ≦ 1.5mm.

408mm

FIG. 2

2. Luminance test.

2.1 Input a 1600x1200 / 60Hz full white pattern at 100IRE with brightness set to 100% and contrast set to

70%.

Color temperature x y

Y (Luminance)

Analog DVI sRGB 0.313 ± 0.01 0.329 ± 0.01 >200 nit >200 nit 9300K 0.283 ± 0.01 0.298 ± 0.01 >150 nit >150 nit 6500K 0.313 ± 0.01 0.329 ± 0.01 >200 nit >200 nit 5400K 0.335 ± 0.01 0.350 ± 0.01 >180 nit >180 nit 5000K 0.346 ± 0.01 0.359 ± 0.01 >180 nit >180 nit

2.2 Input a1600x1200 / 60Hz full white pattern at 100IRE with brightness set to 100% and contrast set to 100%.

Color temperature

Y (Luminance)

Analog DVI 9300K >220 nit >220 nit 6500K >220 nit >220 nit 5400K >220 nit >220 nit 5000K >220 nit >220 nit

3. Picture performance test.

3.1 Picture quality: Test pattern signal The following image faults shall not be conspicuous:

1 100IRE white raster pattern Seam, Noise, Beat, Flicker 2 Cross hatch pattern Ringing, Overshoot, Smear, V-jitter, H-jitter 3 Color bar Color distortion, Noise, Beat, Color tangent 4 Gray scale (16 steps) Noise, Beat, Gamma distortion 5 1 dot ON / 1 dot OFF pattern Noise, Flicker 6 40IRE gray raster Noise, Beat, Gamma distortion

3.2 DVI performance test.

3.2.1 Test equipment: a. VG828 digital pattern generator. b. “TTL” DVI-D single link cable.

3.2.2 Test conditions: a. Resolution: 1600x1200; refresh rate: 75KHz vertical / 60Hz horizontal.

306mm

b. 16, 32, 64, and 256-level horizontal gray scales..

c. 16, 32, 64, and 256-level vertical gray scales..

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4. Shortcut keys and factory presets

4.1 Shortcut keys: Press the following keys to adjust settings directly, when the OSD is not active. [

1]. Main Menu.

[2].

Select next input. (Sequence: D-SUB

→ DVI-A → DVI-D)

[UP] or [DOWN] arrow. Directly activate the Contrast menu. Switch to Brightness menu by

pushing button [

2].

[UP] + [DOWN] arrows. Recall either Contrast or Brightness settings while the Contrast or

Brightness adjustment OSD is active, or recall both Contrast and Brightness settings when the OSD is not active.

[1] + [2].

Toggle 720x400 and 640x400 mode when input 720x400 or 640x400

mode. [1] + [UP] + [DOWN]. White Balance (press and hold for 5 seconds). [2] + [UP] + [DOWN]. Video Mirror Function [1] + [DOWN]. Power Lock / Power Unlock (press and hold for 10 seconds). [1] + [UP]. OSD Lock / OSD Unlock (press and hold for 10 seconds).

DC-Power + [2] + [UP]. Copy EDID to E

PROM.

DC-Power + [1]. Factory mode. (Burn in mode on) DC-Power + [2] + [DOWN]. Burn in mode on. DC-Power + [UP] + [DOWN]. Burn in mode off. DC-Power + [2]. All mode recall. AC-Power on. Enter ISP mode.

4.2 All mode recall settings: Contrast 70%. Brightness 100%. Color Temperature 6500K. Scaling Full Screen. Input Priority Auto Search. OSD H. Position 50%. OSD V. Position 50%. OSD Time Out 15 Sec OSD Background On Resolution Notice Enabled 720x400/640x400 720x400 User color. 50%. Language. English. Clear burn in mode. Clear user mode table.

4.3 Factory shipment settings:

4.3.1 Main power switch: Off.

4.3.2 AC power button: Off.

4.3.3 Others settings same as “All mode recall” settings.

5. Power management tests.

5.1 Power consumption test table:

Monitor status LED color Video signal Power consumption Recover time Normal / Unstable / Warning Green Active <73W Power save Amber Blank <4W 5sec Aging

Note

NA <73W DC power off Off NA <2W AC power off Off NA -

See note:

Amber (0.5sec) → Green (0.5sec) → Amber (0.5sec) → Green (0.5sec)… continuously.

6. DDC test.

6.1 DDC / EDID specification compliance requirement.

The data that is transmitted shall be stored in the monitor in non-volatile memory, which is a

requirement of the VESA EDID version 3.0 standard.

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6.2 IC954 EEPROM data see Appendix-B item a.6.3 For the EDID data see Appendix B. VP2000s

analog & DVI-A are the same as item h. For the DVI-D input 1 see item i.

7. USB test (VP201s/b only)

7.1 Use a USB test hub such as “UPT2 USB2.0 8-port tester” to test USB up stream and down stream

transfers. Each port must pass the test.

7.2 Use a PC to check the USB VID, which should be

0543, and the PID, which should be 1169.

7.3 For USB test settings see Appendix E.

8. For auto alignment, it is necessary to execute the auto image adjust command for 3 DOS modes (640x350,

720x400, 640x400).

E. Analog and Digital timing chart.

Mode No. 1 2 3 4 5 6 7 8 9 10

TEXT

Mode Name

640 x

350

Horizontal Freq. 31.468 31.468 24.688 31.469 35.000 37.861 37.500 43.269 31.469

VGA

640 x

400

VESA

640 x

480

VESA

640 x

480

MAC 640 x

480

VESA

640 x

480

VESA

640 x

480

VESA

640 x

480

TEXT

720 x

400

VESA

800 x

600

35.156

Video clock Freq. 25.175 25.175 19.75 25.175 30.240 31.500 31.500 36.000 28.322 36.000

Sync. Polarity

＋－－－－－－－－＋

H. total (Dots) 800 800 800 800 864 832 840 832 900 1024

H. sync. (Dots) 96 96 64 96 64 40 64 56 108 72

H. back porch (Dots) 48 48 80 48 96 128 120 80 54 128

H. active (Dots) 640 640 640 640 640 640 640 640 720 800

H. front porch (Dots) 16 16 16 16 64 24 16 56 18 24

Vertical Freq. (Hz) 70.087 70.087 49.673 59.940 66.667 72.809 75.000 85.008 70.087 56.250

Sync. Polarity

－＋＋－－－－－＋＋

V. total (Lines) 449 449 497 525 525 520 500 509 449 625

V. sync. (Lines) 2 2 4 2 3 3 3 3 2 2

V. back porch (Lines) 60 35 10 33 39 28 16 25 35 22

V. active (Lines)

350 400 480 480 480 480 480 480 400 600

V. front porch (Lines) 37 12 3 10 3 9 1 1 12 1

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Mode No.

Mode Name

Horizontal Freq. (KHz) 37.879 48.077 46.875 53.674

Video clock Freq. 40.000 50.000 49.500 56.250 57.285 65.000 75.000 78.084 78.750 94.500

Sync. Polarity

H. total (Dots) 1056 1040 1056 1048 1152 1344 1328 1344 1312 1376

H. sync. (Dots) 128 120 80 64 64 136 136 136 96 96

H. back porch (Dots) 88 64 160 152 224 160 144 160 176 208

H. active (Dots) 800 800 800 800 832 1024 1024 1024 1024 1024

H. front porch (Dots) 40 56 16 32 32 24 24 24 16 48

Vertical Freq. (Hz) 60.317 72.188 75.000 85.061 74.553 60.004 70.069 72.082 75.029 84.997

Sync. Polarity

V. total (Lines) 628 666 625 631 667 807 806 806 800 808

V. sync. (Lines) 4 6 3 3 3 6 6 6 3 3

V. back porch (Lines) 23 23 21 27 37 29 29 29 28 38

V. active (Lines)

V. front porch (Lines) 1 37 1 1 3 3 3 3 1 1

11 12 13 14 15 16 17 18 19 20

VESA

800 x

600

＋＋＋＋－－－－＋＋

600 600 600 600 624 768 768 768 768 768

VESA

800 x

600

VESA

800 x

600

VESA

800 x

600

MAC 832 x

624

49.727

VESA

1024 x

768

48.363

VESA

1024 x

768

56.476 58.099

XGA

1024 x

768

VESA

1024 x

768

60.023 68.677

VESA

1024 x

768

Mode No.

Mode Name

Horizontal Freq. (KHz) 68.681 60.000 75.231 63.981 79.976 91.146

Video clock Freq. 100.00 108.00 130.00 108.00 135.00 157.50 74.250 162.00

Sync. Polarity

H. total (Dots) 1456 1800 1728 1688 1688 1728 1650 2160

H. sync. (Dots) 128 112 136 112 144 160 40 192

H. back porch (Dots) 144 312 224 248 248 224 270 304

H. active (Dots) 1152 1280 1280 1280 1280 1280 1280 1600

H. front porch (Dots) 32 96 88 48 16 64 60 64

Vertical Freq. (Hz) 75.062 60.000 74.857 60.020 75.025 85.024 60.000 60.000

Sync. Polarity

V. total (Lines) 915 1000 1005 1066 1066 1072 750 1250

V. sync. (Lines) 3 3 4 3 3 3 5 3

V. back porch (Lines) 39 36 38 38 38 44 20 46

V. active (Lines)

V. front porch (Lines) 3 1 3 1 1 1 5 1

21 22 23 24 25 26 27 28 29 30

APPLE

1152x

870

－＋－＋＋＋－＋

－＋＋＋＋＋－＋

870 960 960 1024 1024 1024 720 1200

VESA

1280 x

960

VESA

1280 x

960

VESA

1280 x

1024

VESA

1280 x

1024

VESA

1280 x

1024

HDTV 1280 x

720

45.000

VESA

1600 x

1200

75.000

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Appendix B: DDC contents.

a. 128 bytes of EDID code for VP201s analog.

b. 128 bytes of EDID code for VP201s digital.

0 1 2 3 4 5 6 7 8 9 0 00 FF FF FF FF FF FF 00 5A 63 10 18 0C 01 01 01 01 01 0F 01 03 20 0E 29 1F 78 2E 30 85 A6 56 4A 30 99 24 14 50 54 BF EF 80 A9 40 40 81 80 81 40 71 4F 01 01 01 01 50 01 01 01 01 48 3F 40 30 62 B0 60 32 40 40 C0 13 00 98 32 11 00 70 00 1E 00 00 00 FF 00 41 32 55 80 30 35 30 31 30 30 30 30 31 0A 90 00 00 00 FD 00 32 4B 1E 5C 11 100 00 0A 20 20 20 20 20 20 00 00 110 00 FC 00 56 50 32 30 31 73 0A 120 20 20 20 20 20 20 00 B0

0 1 2 3 4 5 6 7 8 9 0 00 FF FF FF FF FF FF 00 5A 63 10 18 0C 01 01 01 01 01 0F 01 03 20 80 29 1F 78 2E 30 85 A6 56 4A 30 99 24 14 50 54 BF EF 80 A9 40 40 81 80 81 40 71 4F 31 0A 01 01 50 01 01 01 01 48 3F 40 30 62 B0 60 32 40 40 C0 13 00 98 32 11 00 70 00 1E 00 00 00 FF 00 41 32 55 80 30 35 30 31 30 30 30 30 31 0A 90 00 00 00 FD 00 32 4B 1E 5C 11 100 00 0A 20 20 20 20 20 20 00 00 110 00 FC 00 56 50 32 30 31 73 0A 120 20 20 20 20 20 20 00 05

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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

of the next page.

top

Main Menu with OnView controls

Front Control Panel shown below in detail

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

Scrolls through menu options and adjusts the displayed control.

Also a shortcut to display the Contrast adjustment control screen.

Displays the control screen for the highlighted control.

Also toggles between two controls on some screens.

Also a shortcut to toggle analog and digital connection.

Power light Green = ON Orange = Power

Saving

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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].

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 1600 x 1200 @ 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.

Control Explanation

automatically sizes, centers, and fine tunes

Auto Image Adjust

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

Input Select

adjusts background black level of the screen image.

allows you to toggle between an analog and a

digital signal.

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).

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 ▼.

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

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Control Explanation

Important

: 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. See your graphic card’s user guide for instructions on changing the resolution and refresh rate (vertical frequency).

NOTE:

VESA 1600 x 1200 @ 60 Hz (recommended) means that the resolution is 1600 x 1200 and the refresh rate is 60 Hertz.

Manual Image Adjust

displays the Manual Image Adjust menu.

The

Manual Image Adjust

Horizontal Position

moves the screen image up or down.

Vertical Position

Horizontal Size

sharpens focus by aligning the illuminated text and/

Fine Tune

adjusts the width of the screen image.

moves the screen image left or right.

controls are explained below:

or graphic characters.

adjusts the clarity and focus of the screen image.

Sharpness

Scaling

adjusts the video input signal to the screen size other

than 1600 x 1200 using the following options.

adjusts the video signal so that the height and width of the

1:1

picture are the same.

adjusts the video signal to fill the screen.

Fill all

maintains the correct video signal proportions

Fill Aspect Ratio

for different resolutions.

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Control Explanation

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

Input Priority

advises the optimal resolution to use.

If multiple computers will be connected to the display, this function can be used to select which computer has priority Depending on the selected Input Priority, the display will do a one time detection for available inputs when first powered on.

allows you to move the on-screen display menus

OSD Position

and control screens.

sets the length of time an on-screen display

OSD Timeout

screen is displayed. For example, with a “15 second” setting, if a control is not pushed within 15 seconds, the display screen disappears.

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Control Explanation

OSD Background

allows you to turn the On-Screen-Display

background on or off.

OSD Pivot

This function is used to rotate the OSD menu,

when the display is changed from Landscape to Portrait mode.

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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4. Circuit Description

4.1 Power supply (DC/DC Converter):

4.1.1 IC251 BA9741 is a switching regulator controller that uses a PWM method. It is used for DC to

DC step-down conversion. It converts 24V DC into regulated and stable output voltages of 18V

and 5V.

4.1.2 Regulator:

IC252 converts 5V into regulated and stable O/P 3.3V.

IC253 converts 5V into regulated and stable O/P 1.8V

IC255 converts 5V into regulated and stable O/P 3.3V.

IC256 converts 5V into regulated and stable O/P 2.5V.

4.2 DDC data select:

4.2.1 IC601 (AT24C02) saves D-SUB DDC data.

4.2.2 IC604 (AT24C02) saves DVI-D, DDC data.

4.2.3 IC605 (AT24C02) saves DVI-A, DDC data.

4.3 D-sub and DVI-A signal select

The VP201s is equipped with two analog signal inputs: D-sub and DVI-A. The user may only choose to

display the signal from one of these ports: D-sub or DVI-A.

IC607 (AD8186) is a R, G, B signal switch IC. If the control signal (RGBSEL) is high, the device will

display the DVI-A signal. If the control signal (RGBSEL) is low, the device will display the D-sub.

4.4 Scalar

The gm1601H is a dual channel graphics and video processing IC for Liquid Crystal Display (LCD) monitors and

televisions incorporating Picture in Picture, up to WUXGA output resolutions. The gm1601H provides all key IC

functions required for image capture, processing and display timing control. On-chip functions include a high speed

triple-ADC and PLL, Ultra-Reliable DVI receiver, high quality zoom, and shrink scaling engines, Motion Adaptive

De-interlacing (MADI), Low Angle Diagonal Interpolation (LADI), an on-screen display (OSD) controller, a 100MHz

on-chip X186 micro-controller (OCM), and a selectable double side TTL or dual channel LVDS transmitter for

interface to displays.

4.5 USB(VP201s/b only)

IC951(USB20H04) is a 4-Port USB 2.0 Hub controller. It is compliant with the USB 2.0 specification,

enables bus-powered Hi-Speed hub design, and is compatible with On-The-Go (OTG) USB devices. It is

equipped with a serial interface for configuration from EEPROM or micro-controller when the default

settings are not used. Includes integrated termination and pull-up/pull-down resistors, as well as internal

short circuit protection of DP and DM lines. Supports individual or ganged

over-current protection and power control.

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5. Adjustment Procedure

5.1 General.

1. All specif ications must be met over line voltage range of 90VAC to 264V

50Hz / 60Hz, unless otherwise

specified.

2. Operating temperature range is 0

C to 40oC with a relative humidity of 10% or less to 80%.

3. The monitor must be operational in a usable state within 30 minutes after turn-on.

4. All signal levels are measured assuming termination at the monitor’s input jacks or in its characteristic impedance.

5. All controls must have excess range (no control may be left at an end stop when proper alignment is completed).

6. The monitor is not required to meet specs under the following circumstances, but must tolerate without

damage to the LCD or circuits any sequence or combination of: Power on and off, signal on and off,

erratic or incorrect frequency, noisy inputs, any possible combination of unplugging of power or signal

cables, or any setting of user accessible controls. Likewise, the monitor should survive extended

periods of operation with line voltage reduced below the specified minimum.

7. An isolation transformer should be used when performing alignment and tests. Portions of the power

supply board are hot ground. The remaining boards are cold ground.

8. Ambient condition:

8.1 Illumination: In usual inspection of electric performance and mechanical performance, it shall be 150 ~

260lux.

8.2 Environmental noise: Less than 60dB.

8.3 Interference of EMI: The inspection shall be carried out in a place where the set is not disturbed by

excessive external electric waves or magnetic fields.

8.4 Temperature: 24 ± 2

8.5 Humidity: 65 ± 20%.

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5.2 Instrument alignment.

5.2.1 Adjustment procedure.

Input

D-SUB

Input

640x480 / 60Hz

Chross-hatch

Into Burn-in mode

Push “Down + 2 + DC power”

3 second

Into Factory mode

“1 + DC power”

3 second

Input

640x480 / 60Hz

5-Mosaic pattern

Push “up” key into factory mode

OSD Select “Auto BI” function

Select “S-RGB, 9300K, 6500K,

5400K, 5000K to adjust” RGB

gain and “save color”

Select “Copy TODS”, “Copy

TODA”, and “Copy TODD”

Function

ISP new program (option)

Push key

Exit adjust OSD

ISP new program to LCD

Do initial function push

“1 + up + down + AC on/ff ”

3 second

Do “All mode recall” function

push “2 key + DC power”

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5.2.2 Video alignment.

5.2.2.1 Initial Conditions

5.2.2.1.1 Set the contrast to 70%

and set brightness to 100%..

5.2.2.1.2 Input a 640x480 / 60Hz 5-block (5-MOSAIC) pattern (input level 100IRE

0.7Vp-p), then adjust the white balance. SRBG/9300K / 6500K / 5400K / 5000K, R G B Gain preset as below:

sRGB 9300K 6500K 5400K 5000K

Analog DVI Analog DVI Analog DVI Analog DVI Analog DVI R Gain 255 255 255 255 255 255 255 255 255 255 G Gain 255 255 255 255 255 255 255 255 255 255 B Gain 255 255 255 255 255 255 255 255 255 255

5.2.2.2 9300K alignment:

5.2.2.2.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.

5.2.2.2.2 Adjust R, G, and B Gain to meet following chromaticity spec: 9300K → x = 0.283 ± 0.005, y = 0.298 ± 0.005, Y > 150cd/m

(Both analog & DVI).

5.2.2.3 6500K alignment:

5.2.2.3.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.

5.2.2.3.2 Adjust R, G and B Gain to meet following chromaticity spec: 6500°K → x = 0.313 ±0.005, y = 0.329 ± 0.005, Y > 200cd/m

(Both analog & DVI).

5.2.2.4 5400K alignment:

5.2.2.4.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.

5.2.2.4.2 Adjust R, G, and B Gain to meet following chromaticity spec: 5400K → x = 0.335 ± 0.005, y = 0.350 ± 0.005, Y > 180cd/m

(Both analog & DVI).

5.2.2.5 5000K alignment:

5.2.2.5.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.

5.2.2.5.2 Adjust R, G and B Gain to meet following chromaticity spec: 5000°K → x = 0.346 ±0.005, y = 0.359 ± 0.005, Y > 180cd/m

(Both analog & DVI).

5.2.2.6 sRGB alignment:

5.2.2.6.1 Input 1600x1200 / 60Hz & full white pattern at 100IRE.

5.2.2.6.2 Adjust R, G and B Gain to meet following chromaticity spec: sRGB → x = 0.313 ±0.005, y = 0.329 ± 0.005, Y > 200cd/m

(Both analog & DVI).

5.2.2.7 64 grays and 16 grays pattern check:

5.2.2.7.1 Input a 1600x1200 / 60Hz, 64 gray-level pattern at 100IRE, with brightness set to 100%

and contrast set to 70%.

5.2.2.7.2 Verify that under the 9300K / 6500K / 5400K / 5000K settings, no more than 2 of the 64

grays are saturated.

5.2.2.7.3 Input a 1600x1200 / 60Hz, 16 gray-level pattern at 100IRE, with brightness set to 100%

and contrast set to 100%

5.2.2.7.4 Verify that under the 9300K / 6500K / 5400K / 5000K settings, no more than 4 of the 16

grays are saturated.

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+ 53 hidden pages

ViewSonic VP201b-1,VP201s-1,VLCDS26064-2W,VLCDS26064-4W Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual