ViewSonic VLCDS25973-2W Manuale utente

Service Manual

Model No. VLCDS25973-2W/3W

19” Color TFT LCD Display

ViewSonic VP191b/s-1/-2-1

ViewSonic

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

(VP191b/s_SM_678 Rev. 1dApr.2005)

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 02/11/04 Initial Release DCN-4207 Angela Luh

DCN Number ECR Number

Documents Number Description of Changes EditorRevision SM Editing Date

1a 06/28/03 3379 Initial Release F. Fellen

1c 10/18/04 4775

1b 04/23/04 4290 A. Lu

Cost Down Chassis change

4801 Change Panel From FJ FLC48SXC8V-11A SXGA 25ms

To FJ FLC48SXC8V-11AA 16ms A. Lu

4226

1d 04/12/05

5241

5056 Change Panel From FJ FLC48SXC8V-11AA 16ms

To AUO M190EN03 V0 8ms and Change scalar to gm5321 A. Lu

TABLE OF CONTENTS

2. Specification

3. Front Panel Function Control Description

4. Circuit Description

6. Troubleshooting Flow Chart

9. Block Diagram

10. Schematic Diagrams

7. Recommended Spare Parts List

1. Precautions and Safety Notices

5. Adjustment Procedure

8. Exploded Diagram and Exploded 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 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. LCDModule 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 CMOSLSI isusedinthis 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.

1. Precautions and Safety Notices

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(11) After installation of theTFT Module intoan enclosure(LCDmonitor 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 theTFT 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 fordisposal.

(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 theCCFL to a HazardousVoltage Circuit.

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LCD Technology

Model number AUO M190EN03 V.0

Type MVA type with LVDS interface

Active Size 376.32 (H) x 301.06 (V)

Pixel Arrangement RGB Vertical Stripe

Pixel Pitch 0.294 mm

Glass Treatment Anti Glare (Hard coating 3H)

# of Backlights 4CCFL edge-light (2top / 2bottom)

Backlight Life 40,000 Hours (Typ)

50,000 Hours (Min)

Luminance (Center) –CT = 6500K,

Contrast/ Brightness = Max 250 cd/m2 (Typ after 30 minute warm up)

200 cd/m2 (Min after 30 minute warm up)

Brightness Uniformity 80% (typ) / 75% (Min) Entire Area

Contrast Ratio 800:1 (typ), 500:1 (min)

Color Depth 16 million colors (8bit)

Viewing Angle (Horizontal, CR>10)Typical: 170º

Viewing Angle (Vertical, @ CR>10)Typical: 170º

Response Time

10%-90% @ Ta=25°C

Black to White

20 ms (Tr= 15 ms, Tf = 5 ms) (typ)

40 ms (Tr= 25 ms, Tf = 15 ms) (max)

Gray to Gray

8 ms (typ)

Mercury 3.0 mg (Max) per lamp

Panel Defects Please see Panel Quality Specifications.

Displayable Color -16.7M Colors

Max. Pixel Clock -135MHz

Re-Scaling -Yes

I/O Connectors -AC power in

-VGA in D-Sub 15 pin x 2

-DVI-D Connector x1

Power Saving -VESA DPMS Standard

Power Consumption -On Mode: 40Watt (typ.); 50 Watt (Max)

-Active Off Mode: ≦2W (Max)

Ergonomics

Tilt Up ≧25º

Tilt Down From 0ºdown to -3º~ -5 º

Swivel Right 45 degrees

Swivel Left 45 degrees

Height Adjust 0~110 mm

Pivot 0~90 degrees (Clockwise)

Environmental -Operating Temperature: 0o ~ 40oC/32o ~ 104oF

-Operating Related Humidity: 20% ~ 90% RH Non-condensing

-Storage Temperature: -20o ~ 60oC/ -4o ~ 140oF

2. Specification

-Storage Related Humidity: 5% ~ 90% RH Non-condensing

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Mounting Interface -VESA Flat Panel Monitor Physical Mounting Interface

Power Supply -Internal Power Supply

-Power Dissipation: 50 Watts (typ.)

Dimension (W*H*D) -416.0mm x460.0mm x238.0mm

Weight -7.5 kgs/16.5 lbs

Agency Approval -UL, cUL, FCC-B, CB, CE, NOM, TUV/GS, TUV ERGO

(covers ISO13406-2 & MPRII), TCO’03 (VP191s-2), TCO’99

(VP191b-2 / VP191b-2H), GOST-R + 20 ORIGINAL COPIES

HYGIENIC, SASO, VCCI, BSMI, CCC, (PSB), (C-TICK), Green

Mark, Energy Star

Compatible Modes

Item Timing Analog Digital

1640 x 350 @ 70Hz, 31.5kHz Yes Yes

2640 x 400 @ 60Hz, 31.5kHz Yes Yes

3640 x 400 @ 70Hz, 31.5kHz Yes Yes

4640 x 480 @ 50Hz, 24.7kHz Yes Yes

5640 x 480 @ 60Hz, 31.5kHz Yes Yes

6640 x 480 @ 67Hz, 35.0kHz Yes Yes

7640 x 480 @ 72Hz, 37.9kHz Yes Yes

8640 x 480 @ 75Hz, 37.5kHz Yes Yes

9640 x 480 @ 85Hz, 43.27kHz Yes Yes

10 720 x 400 @ 70Hz, 31.5kHz Yes Yes

11 800 x 600 @ 56Hz, 35.1kHz Yes Yes

12 800 x 600 @ 60Hz, 37.9kHz Yes Yes

13 800 x 600 @ 75Hz, 46.9kHz Yes Yes

14 800 x 600 @ 72Hz, 48.1kHz Yes Yes

15 800 x 600 @ 85Hz, 53.7kHz Yes Yes

16 832 x 624 @ 75Hz, 49.7kHz Yes Yes

17 1024 x 768 @ 60Hz, 48.4kHz Yes Yes

18 1024 x 768 @ 70Hz, 56.5kHz Yes Yes

19 1024 x 768 @ 72Hz, 58.1kHz Yes Yes

20 1024 x 768 @ 75Hz, 60.0kHz Yes Yes

21 1024 x 768 @ 85Hz, 68.67kHz Yes Yes

22 1152 x 864 @ 75Hz, 67.5kHz Yes Yes

23 1152 x 870 @ 75Hz, 68.7kHz Yes Yes

24 1280 x 1024 @ 60Hz, 63.4kHz Yes Yes

25 1280 x 1024 @ 75Hz, 79.97kHz Yes Yes

26 1280x 720 @ 60Hz, 45kHz (HDTV) Yes Yes

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AdjustingtheScreen 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.

Front Control Panel

shown below in detail

Main Menu

with OnView controls

Scrolls through menu options and

adjusts the displayed control.

Also a shortcut to display the

Contrast adjustment control

screen.

Power

On/Off

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

Displays the Main Menu

or exits the control screen

and saves adjustments.

3. Front Panel Function Control Description

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Do the following to adjust the screen image:

1To 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.

2To select a control you want to adjust, press ▲or ▼to scroll up or down the

Main Menu.

3After the control is selected, press button [2]. A control screen like the one

shown below appears.

4To adjust the control, press the up ▲or down ▼buttons.

5To 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.)

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.

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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 adjusts background black level of the screen image.

Input Select toggles between inputs if you have more than one

computer connected to the VP191/VP191b/VP191s.

Color Adjust provides several color adjustment modes: preset

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

5000K — Adds blue and green to the screen image for a darker

color.

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