ViewSonic VA912-4, VS10867, VA912b-4 Service manual

Service Manual

ViewSonic VA912-4

VA912b-4

Model No. VS10867

19” Color TFT LCD Display

ViewSonic

(VA912/b-4_SM Rev. 1a Nov. 2005)



381 Brea Canyon Road, Walnut, California 91789 USA - [phone]

Copyright

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.

2005 by ViewSonic Corporation. All rights reserved. No part of this publication may be

¤

Revision History

ECR Number

1a

11/09/05

Initial Release

Description of Changes

EditorRevision SM Editing Date

G. Han

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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 Exploded Parts List

9. Block Diagram

10. Schematic Diagrams

11. PCB Layout Diagrams

1
3

11
13

24
34

37
43

47
48

53

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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

1 PRODUCT DEFINITION AND SPECIFICATION

VSA

VSAP

VSE

VSCN

Region

(M)

Product Name

(A)/(S)/(K)

(E)/(U)

VA912/b-4 / VA912-4U

(G)

Model Number VS10867

English, French, German, Italian, Spanish,

OSD Languages

Finnish, Japanese, Traditional Chinese,

Simplified Chinese

TFT LCD Panel and Model # Vendor : HSD, Model # : 190ME13 A02

Scalar Model # : RTD 2523

Input Signal Analog / Digital

Sync Compatibility Separate

Audio 1W x 2

a. Refer to Appendix D

Power Cable

b. U model: (2 power cables are required)

1. Schuko CEE7-7 Type Plug

2. Separate 3-prong BS 1363 Type Plug

Analog Cable (1.8 m, color : black), with PC

YES

2001 and Hot Plug Detect &DDC

Audio Cable (1.8m, Color: black) with PC

YES

2001

DVI Cable(1.8m, color: black) with PC 2001

ViewSonic CD Wizard

ViewSonic Quick Start Guide

Screen Protector Mylar

Warranty Sticker NO NO NO

Warranty Card NO NO NO

Carton Sticker NO NO NO

PE bag of Carton NO NO NO

YES YES No YES

Arabic, English, Finnish, Spanish, German,

Italian, Swedish, Polish, Korean, Portuguese,

Russian, French, Simplified Chinese, Traditional

Chinese, Hungary, Czech, Turkish

YES YES YES YES

YES

YES

YES

YES

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This product specification is divided into the following categories:

4-1 General Specification 4-11 Environmental

4-2 Video Interface 4-12 Manuals and Documents

4-3 Power Supply 4-13 Regulatory and Safety

4-4 Electrical Requirement 4-14 Video Communications

4-5 Front Panel Control and Indicators 4-15 Coding Assignment

4-6 Audio Interface 4-16 Reliability

4-7 TFT LCD Panel 4-17 Mass Production Release

4-8 Image Performance 4-18 ECR / ECN

4-9 Mechanical 4-19 Service

4-10 Packaging

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GENERAL specification

Test Resolution & Frequency 1280x1024 @ 60Hz

Test Image Size Full Size

Contrast and Brightness Controls

Factory Default:

Contrast = 70%, Brightness = 100%

VIDEO INTERFACE

Analog Input Connector DB-15 (Analog), refer the appendix A

Digital Input Connector DVI-I (digital)

Default Input Connector Defaults to the first detected input

Equal to twice the weight of the monitor for

Video Cable Strain Relief

five minutes

Video Cable Connector DB-15 Pin out Compliant DDC 2B

1. Video RGB (Analog)

Video Signals

2. DVI (Digital)

Separate

Video Impedance 75 Ohms (Analog)

Maximum PC Video Signal 950 mV with no damage to monitor

Maximum Mac Video Signal 1250 mV with no damage to monitor

Sync Signals LVDS

DDC 2B Compliant with Revision 1.3

Sync Compatibility Separate Sync

Shall be compatible with all PC type

Video Compatibility

computers, Macintosh computers, and after

market video cards

640 x 350*, 640 x 480, 720 x 400* (640 x

400*), 800 x 600, 832 x 624, 1024 x 768,

1152 x 870, 1280 x 720, 1280 x 960, 1280 x

Resolution Compatibility

1024

* The image vertical size might not be full screen.

But the image vertical position should be at the center.

Exclusions Not compatible with interlaced video

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POWER SUPPLY

Power Supply (Adapter) FSP043-2PI01

Input Voltage Range 90 TO 264 VAC

Input Frequency Range 47 TO 63 HERTZ

Short Circuit Protection Output can be shorted without damage

Over Current Protection 5.13 A typical at 18.1 VDC

Leakage Current 0.25mA (Max) at 264VAC / 50Hz

EFFICIENCY 80 % typical at 115VAC Full Load

Fuse Internal and not user replaceable

Power Dissipation 65 Watts

Max Input AC Current 1.8Arms @ 90VAC,

INRUSH CURRENT (COLD START) 100 A @ 240VAC , 50Hz

Shall start and function properly when under

Power Supply Cold Start

Power Supply Transient Immunity

Power Supply Line Surge Immunity

Power Supply Missing Cycle Immunity

Power Supply Acoustics

full load, with all combinations of input

voltage, input frequency, and operating

temperature

Shall be able to withstand an EN61000-4-4

±2KV transient test with no damage

Shall be able to withstand ±2KV (L-L) and

±2.3KV (L-PE) with no damage

Shall be able to function properly, without

reset or visible screen artifacts, when ½

cycle of AC power is randomly missing at

nominal input

The power supply shall not produce audible

noise that would be detectable by the user.

Audible shall defined to be in compliance

with ISO 7779 (DIN EN27779:1991) Noise

measurements of machines acoustics.

Power Switch noise shall not be considered

Separate 3-prong NEMA 5-15P type plug.

US Type Power Cable

Length = 1.8m. Connects to display.

Color = Black

Schuko CEE7-7 type plug.

European Type Power Cable

Length = 1.8m, Connects to display.

Color = Black

Separate 3-prong type plug.

CCC Type Power Cable

Length = 1.8m. Connects to display.

Color = Black

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Separate 2-prong NEMA 1-15P type plug.

PSE Type Power Cable

Length = 1.8m. Connects to display.

Color = Black

Power Saving Operation(Method) VESA DPMS Signaling

ON Mode < 40W (max) / 36 W (typ)

Power Consumption

ACTIVE OFF < 1 W

Recovery Time ON MODE = N/A, ACTIVE OFF < 5 SEC

ELECTRICAL REQUIREMENT

Horizontal / Vertical Frequency

Horizontal Frequency 30 – 82 KHZ

Vertical Refresh Rate 50 – 85* HZ.

Maximum Pixel Clock 135 MHz

Sync Polarity Independent of sync polarity.

Timing Table

Item Timing Analog Digital

1 640 x 350 @ 70Hz, 31.5kHz Yes Yes

2 640 x 400 @ 60Hz, 31.5kHz Yes Yes

3 640 x 400 @ 70Hz, 31.5kHz Yes Yes

4 640 x 480 @ 60Hz, 31.5kHz Yes Yes

5 640 x 480 @ 67Hz, 35.0kHz Yes Yes

6 640 x 480 @ 72Hz, 37.9kHz Yes Yes

7 640 x 480 @ 75Hz, 37.5kHz Yes Yes

8 640 x 480 @ 85Hz, 43.27kHz Yes Yes

9 720 x 400 @ 70Hz, 31.5kHz Yes Yes

10 800 x 600 @ 56Hz, 35.1kHz Yes Yes

11 800 x 600 @ 60Hz, 37.9kHz Yes Yes

12 800 x 600 @ 75Hz, 46.9kHz Yes Yes

13 800 x 600 @ 72Hz, 48.1kHz Yes Yes

14 800 x 600 @ 85Hz, 53.7kHz Yes Yes

15 832 x 624 @ 75Hz, 49.7kHz Yes Yes

16 1024 x 768 @ 60Hz, 48.4kHz Yes Yes

17 1024 x 768 @ 70Hz, 56.5kHz Yes Yes

18 1024 x 768 @ 72Hz, 58.1kHz Yes Yes

19 1024 x 768 @ 75Hz, 60.0kHz Yes Yes

20 1024 x 768 @ 85Hz, 68.67kHz Yes Yes

21 1152 x 870 @ 75Hz, 68.7kHz Yes Yes

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22 1280 x 1024 @ 60Hz, 63.4kHz Yes Yes

23 1280 x 1024 @ 75Hz, 79.97kHz Yes Yes

24 1280x 720 @ 60Hz, 45kHz (HDTV) Yes Yes

Primary Presets

1280x1024 @ 60Hz

User Presets

Number of User Presets (recognized timings) Available: 10 presets total in FIFO

configuration

Changing Modes

● Maximum Mode Change Blank Time for image stability : 3 seconds (Max), excluding

“Auto Adjust” time

● Under DOS mode (640 x 350, 720 x 400 & 640 x 400), there is no “Auto Adjust”

feature.

● The monitor needs to do “Auto Adjust” the first time a new mode is detected but except

the DOS mode 640 x 350, 720 x 400 & 640 x 400.(see section “0-Touch™ Function

Actions”)

● While running Change Mode, Auto Adjust or Memory Recall, the image shall blank

FRONT PANEL CONTROLS AND INDICATORS

Front Panel Hardware Controls

Power Switch (Front Head) Power Control, soft Power Switch.

Power LED (Front Head) Green – ON

Orange – Active Off

Dark = Soft Power Switch OFF

Front Panel Controls (Head)

[;X] [ 1 ] [▲] [▼] [ 2 ] [

]

] Power

[

[ 1 ] Button 1

[ 2 ] Button 2

[▲] Up arrow button

[▼] Down arrow button

[; X]

MUTE

Note: Power Button, Button 1 and Button 2

and Mute Button must be one-shot logic

operation. (i.e. there should be no cycling)

Reaction Time OSD must fully appear within 0.5s after

pushing Button 1

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Panel Source Identify

(1) ID label - The panel code “T” for HSD panel should be shown on the lower right side

of ID label. (See Figure 2)

(2) UPC label - The panel code “T” for HSD panel should be shown on the lower right

side of UPC label. (See Figure 3)

Panel Characteristics:

Model number HSD 190ME13-A02

Type TN type with LVDS interface

Active Size 376.32 (H) x 301.056 (V)

Pixel Arrangement RGB Vertical Stripe

Pixel Pitch 0.294 mm

GLASS TREATMENT Anti Glare (Hard coating 3H)

# OF BACKLIGHTS 4 CCFL direct light

BACKLIGHT LIFE 40,000 Hours (min)

Luminance (Center) –

Condition:

250 cd/m2 (Typ after 30 minute warm up)

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

CT = 6500K, Contrast = Max,

Brightness = Max

U = 80% (typ), 75% (Min).

Brightness Uniformity (9 Points)

U = Min Luminance in 5 points / Max

Luminance in 5 points

Contrast Ratio 600 (typ), 450 (min)

Color Depth 16 million colors (6 bit + 2 bit FRC)

Viewing Angle (Horizontal)

VIEWING ANGLE (VERTICAL)

Response Time

@ CR>10

Typical: 140

Minimum: 120

@ CR>10

Typical: 130

Minimum: 110

8ms (Tr= 2 ms, Tf = 6 ms) (typ)

@ CR>5

Typical: 160

Minimum: 140

@ CR>5

Typical: 150

Minimum: 130

10%-90% @ Ta=25°C

20 ms (Tr= 7 ms, Tf = 13 ms) (max)

Panel Defects Please see Panel Quality Specifications.

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MECHANICAL

Dimension (Desktop)

Width 437 mm (17.2 inch)

Height 419 mm (16.5 inch)

Depth 216 mm (8.5 inch)

Monitor Weight 4.7 Kg/ 10.4 lbs

Ergonomics

Tilt Up ≧ 20 º to 18°

Tilt Down ≦ -5 º to -3°

Vibration Test

● Vibration Frequency : 2 – 200 Hz

● Acceleration : 1.14 G RMS

● Sweep Time : 1 oct. / min

*Refer to Figure 1

● Test Time : 60 min per axis, total 3 axis / 6 main face

● Vibration Test Data shall be submitted for approval to ViewSonic before Mass

Production

Drop Test (100G)

● Weak Corner : 76.2 cm

● Six Faces : 76.2 cm

● 3 Edges Radiating From Weak Corner : 76.2 cm

● Drop Test Data shall be submitted for approval to ViewSonic before Mass Production

ENVIRONMENTAL

● Operating Temperature : 5°C to +35°C

● Storage Temperature : -20°C to +55°C

● Operating Relative Humidity : 20% to 80% RH Non-Condensing

● Storage Relative Humidity : 20% to 85% RH Non-Condensing

● Operating Altitude : 0 to +3,000 meters

● Storage Altitude : 0 to +12,000 meters

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3. Front Panel Function Control Description

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ViewSonic VA921-4/VA921b-4/VA912-4U

Main Menu Controls

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

A. 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.

B. Contrast adjusts the difference between the image background (black level) and the foreground (white level).

C. Brightness adjusts the lamps current to control the screen brightness.

D. Input adjusts the Analogue or the Digital input source

E. Audio Adjust the volume increase or decrease and mute function

F. Color Adjust

adjust red (R), green (G), and blue (B). 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).

5400K — Adds red to the screen image for warmer white and richer red.

Custom User Color — Individual adjustments for red, green, and blue.

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

2 To adjust selected color, press or .

3 When you are finished making all color adjustments, press button [1] twice.

G. 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). VESA 1280

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

H. Manual Image Adjust

H. Size (Horizontal Size) adjusts the width of the screen image.

NOTE: Vertical size is automatic with your LCD display.

H./V. Position adjusts horizontal and vertical position of the screen image. You can toggle between Horizontal and

Vertical by pressing button [2]. Horizontal moves the screen image to the left or to the right. Vertical moves the screen

image up and down.

Fine Tune sharpens focus by aligning the illuminated text and/or graphic characters.

Sharpness adjusts the clarity and focus of the screen image.

Setup Menu controls are explained below:

Language allows you to choose the language used in the menus and control screens.

Resolution Notice displays the recommended resolution for this LCD display.

Enable allows the Resolution Notice to appear on-screen.

Disable will not allow the Resolution Notice to appear on-screen.

OSD Timeout sets the length of time an on-screen display screen is displayed. For example, with a“15 second”

I. OSD Position allows you to move the on-screen display menus and control screens.

J. Memory Recall

Timing Mode listed in this user guide.

provides several color options: preset color temperatures and Custom User Color which allows you to

controls are explained below:

setting, if a control is not pushed within 15 seconds, the display OSD disappears.

returns adjustments to the original factory settings if the display is operating in a factory Preset

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4. Circuit Description

1. Outline

1.1 Power On/Off, up arrow- button, down arrow button, (1) MENU button, (2) Enter button, Mute button on

the front panel.

1.2 D-sub 15pin connector, DVI-D connector, audio line-in receptacle, and AC-IN are located on the back side

of the cabinet.

1.3 OSD menu includes the following function;

Auto Image Adjust (only active under analog input)

Contrast/Brightness

Input Select

Audio Adjust

Color Adjust

Information

Manual Image Adjust

Setup Menu

Memory Recall

1.4 Contrast and Brightness can be directly controlled with UP / DOWN key.

1.5 Audio volume can be controlled with up key and down key when Audio Adjust menu is active.

Pushing Mute key can disable audio output.

1.6

2. CONNECTORS

2.1 AC inlet : CEE22 typed connector

2.2 Audio : Line-in,

CN9

Line-in receptacle

(Line-in receptacle is green)

2.3 Video signal connector for analog input: 15P Mini D-Sub

16

1

11

1

5

4

3

2

6

2

7

3

8

4

9

12

13

14

5

15

10

CN6

DB15HD

17

PIN MNEMONI SIGNAL

1 RV Red Video

2 GV Green Video

3 BV Blue Video

4 NC None

5 GND Ground (DDC return)

6 RG Red GND

7 GG Green GND

8 BG Blue GND

9 +5V +5V (for DDC)

10 SG Sync GND

11 NC None

12 SDA DDC Data

13 HS Horizontal Sync

14 VS Vertical Sync

15 SCL DDC Clock

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Video signal connector for digital input: 24pin DVI-D connector

2.4

CN9

Pin No. Signal Name Description

1 RX2- TMDS negative differential input, channel 2

1

RX2-

RX2+

GND

RX4-

RX4+

SCL

SDA

VS

RX1-

RX1+

GND

RX3-

RX3+

5V

GND

HP

RX0-

RX0+

GND

RX5-

RX5+

GND

RXC+

RXC-

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

2 RX2+ TMDS positive differential input, channel 2

3 GND Logic Ground

4 RX4- Reserved. No connection

5 RX4+ Reserved. No connection

6 SCL DDC2B Clock

7 SDA DDC2B Data

8 VS Reserved. No connection

9 RX1- TMDS negative differential input, channel 1

10 RX1+ TMDS positive differential input, channel 1

11 GND Logic Ground

12 RX3- Reserved. No connection

13 RX3+ Reserved. No connection

14 +5V Power

15 GND Logic Ground

16 HP SENSE Pin, Pull High

17 RX0- TMDS negative differential input, channel 0

DVI-D

18 RX0+ TMDS positive differential input, channel 0

19 GND Logic Ground

20 RX5- Reserved. No connection

21 RX5+ Reserved. No connection

22 GND Logic Ground

23 RXC+ TMDS positive differential input, reference clock

24 RXC- TMDS negative differential input, reference clock

3. ELECTRICAL SPECIFICATIONS

3.1 Standard conditions

Display Area

Video Signal

Contrast

Brightness

Ambient

Input

Warming up

Display

376.32 x 301.056 mm

0.7Vpp

Default

Default

20 +/- 5 °C

AC

> 30 min

1280 x 1024

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3.2 POWER

3.2.1 Power supply

Input voltage 100~240Vac

Power frequency 50~60Hz

Input current

Inrush current

Power consumption 36W(typical);40Watts(Max)

3.2.2 Power Management

State Power Indicator

On 36Watts Blue

Standby < 1Watts Amber

<1.8Arms@90Vac

100A(Max) at 90Vac(cold start)

Off <1Watts Off

3.3 Acceptable timing

If the timing is within following specification, this LCD display can automatically function with a certain

position.

Horizontal: Sync frequency: 30~82 kHz

Vertical: Sync frequency: 50~85*Hz

3.4 Signal level and input impedance

3.4.1 Video Signal level: 0.7Vp-p Video signal.

3.4.2 Sync Signal level

H/V Separate: TTL level

3.4.3 Input impedance

Analog video input: 75 ohm

Digital video input: 100 ohm

Sync input: > 1 k ohm

Audio input: 10K ohm

4. SIGNAL CABLE: Signal cable with Mini D-Sub 15P connectors at both ends. Length: 1.8 meter.

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5. EDID data

5.1. Analog EDID: Analog EDID is stored in U8.

Time: 15:03:33

Date: Fri Aug 05, 2005

______________________________________________________________________

______________________________________________________________________

VIEWSONIC CORPORATION

EDID Version # 1, Revision # 3

DDCTest For: ViewSonic VA912-4SERIES

______________________________________________________________________

______________________________________________________________________

EDID Block 0, Bytes 0-127

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 | 1C 72 00 00 00 00 01 0F 01 03

20 | 08 26 1E 78 2E FD 56 A5 53 4A

30 | 9D 24 14 4F 54 BF EF 80 81 80

40 | 81 40 71 4F 61 59 45 59 31 59

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 50 57 38

80 | 30 35 30 31 30 30 30 30 31 0A

90 | 00 00 00 FD 00 32 55 1E 52 0E

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

110 | 00 FC 00 56 41 39 31 32 2D 34

120 | 53 45 52 49 45 53 00 18

______________________________________________________________________

(08-09) ID Manufacturer Name ________________ = VSC

(11-10) Product ID Code _____________________ = 721C

(12-15) Last 5 Digits of Serial Number ______ = Not Used

(16) Week of Manufacture _________________ = 01

(17) Year of Manufacture _________________ = 2005

(10-17) Complete Serial Number ______________ = See Descriptor Block

(18) EDID Version Number _________________ = 1

(19) EDID Revision Number ________________ = 3

(20) VIDEO INPUT DEFINITION:

Analog Signal

0.700, 0.300 (1.000 Vp-p)

Separate Syncs

(21) Maximum Horizontal Image Size ________________ = 380 mm

(22) Maximum Vertical Image Size __________________ = 300 mm

(23) Display Gamma ________________________________ = 2.20

(24) Power Management and Supported Feature(s):

Active Off/Very Low Power, Standard Default Color Space,

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Preferred Timing Mode

Display Type = R/G/B Color

(25-34) CHROMA INFO:

Red X - 0.647 Green X - 0.292 Blue X - 0.142 White X - 0.310

Red Y - 0.327 Green Y - 0.614 Blue Y - 0.079 White Y - 0.330

(35) ESTABLISHED TIMING I:

720 X 400 @ 70Hz (IBM,VGA)

640 X 480 @ 60Hz (IBM,VGA)

640 X 480 @ 67Hz (Apple,Mac II)

640 X 480 @ 72Hz (VESA)

640 X 480 @ 75Hz (VESA)

800 X 600 @ 56Hz (VESA)

800 X 600 @ 60Hz (VESA)

(36) ESTABLISHED TIMING II:

800 X 600 @ 72Hz (VESA)

800 X 600 @ 75Hz (VESA)

832 X 624 @ 75Hz (Apple,Mac II)

1024 X 768 @ 60Hz (VESA)

1024 X 768 @ 70Hz (VESA)

1024 X 768 @ 75Hz (VESA)

1280 X 1024 @ 75Hz (VESA)

(37) Manufacturer's Reserved Timing:

1152 X 870 @ 75Hz (Apple,Mac II)

(38-53) Standard Timing Identification:

1280 X 1024 @60Hz

1280 X 960 @60Hz

1152 X 864 @75Hz

1024 X 768 @85Hz

800 X 600 @85Hz

640 X 480 @85Hz

Not Used

Not Used

______________________________________________________________________

(54-71) Detailed Timing / Descriptor Block 1:

1280x1024 Pixel Clock: 108.00 MHz

______________________________________________________________________

Horizontal Image Size: 376 mm Vertical Image Size: 301 mm

Refreshed Mode: Non-Interlaced Normal Display - No Stereo

Horizontal:

Active Time: 1280 pixels Blanking Time: 408 pixels

Sync Offset: 48 pixels Sync Pulse Width: 112 pixels

Border: 0 pixels Frequency: 63.98 KHz

Ver t i c al:

Active Time: 1024 lines Blanking Time: 42 lines

Sync Offset: 1 lines Sync Pulse Width: 3 lines

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Border: 0 lines Frequency: 60.02 Hz

Digital Separate, Horizontal Polarity (+) Vertical Polarity (+)

______________________________________________________________________

(72-89) Detailed Timing / Descriptor Block 2:

Monitor Serial Number:

PW8050100001

______________________________________________________________________

(90-107) Detailed Timing / Descriptor Block 3:

Monitor Range Limits:

Min Vertical Freq - 50 Hz

Max Vertical Freq - 85 Hz

Min Horiz. Freq - 30 KHz

Max Horiz. Freq - 82 KHz

Pixel Clock - 140 MHz

Secondary GTF - Not Supported

______________________________________________________________________

(108-125) Detailed Timing / Descriptor Block 4:

Monitor Name:

VA912-4SERIES

(126) No Extension EDID Block(s)

(127) CheckSum OK

5.2. Digital EDID: Digital EDID is stored in U5.

Time: 15:02:23

Date: Fri Aug 05, 2005

______________________________________________________________________

______________________________________________________________________

VIEWSONIC CORPORATION

EDID Version # 1, Revision # 3

DDCTest For: ViewSonic VA912-4SERIES

______________________________________________________________________

______________________________________________________________________

EDID Block 0, Bytes 0-127

128 BYTES OF EDID CODE:

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0 1 2 3 4 5 6 7 8 9

________________________________________

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

10 | 1C 72 00 00 00 00 01 0F 01 03

20 | 80 26 1E 78 2E FD 56 A5 53 4A

30 | 9D 24 14 4F 54 BF EF 80 81 80

40 | 81 40 71 4F 61 59 45 59 31 59

50 | 31 0A 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 50 57 38

80 | 30 35 30 31 30 30 30 30 31 0A

90 | 00 00 00 FD 00 32 55 1E 52 0E

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

110 | 00 FC 00 56 41 39 31 32 2D 34

120 | 53 45 52 49 45 53 00 67

______________________________________________________________________

(08-09) ID Manufacturer Name ________________ = VSC

(11-10) Product ID Code _____________________ = 721C

(12-15) Last 5 Digits of Serial Number ______ = Not Used

(16) Week of Manufacture _________________ = 01

(17) Year of Manufacture _________________ = 2005

(10-17) Complete Serial Number ______________ = See Descriptor Block

(18) EDID Version Number _________________ = 1

(19) EDID Revision Number ________________ = 3

(20) VIDEO INPUT DEFINITION:

Digital Signal

Non - VESA DFP 1.x Compatible

(21) Maximum Horizontal Image Size ________________ = 380 mm

(22) Maximum Vertical Image Size __________________ = 300 mm

(23) Display Gamma ________________________________ = 2.20

(24) Power Management and Supported Feature(s):

Active Off/Very Low Power, Standard Default Color Space,

Preferred Timing Mode

Display Type = R/G/B Color

(25-34) CHROMA INFO:

Red X - 0.647 Green X - 0.292 Blue X - 0.142 White X - 0.310

Red Y - 0.327 Green Y - 0.614 Blue Y - 0.079 White Y - 0.330

(35) ESTABLISHED TIMING I:

720 X 400 @ 70Hz (IBM,VGA)

640 X 480 @ 60Hz (IBM,VGA)

640 X 480 @ 67Hz (Apple,Mac II)

640 X 480 @ 72Hz (VESA)

640 X 480 @ 75Hz (VESA)

800 X 600 @ 56Hz (VESA)

800 X 600 @ 60Hz (VESA)

(36) ESTABLISHED TIMING II:

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800 X 600 @ 72Hz (VESA)

800 X 600 @ 75Hz (VESA)

832 X 624 @ 75Hz (Apple,Mac II)

1024 X 768 @ 60Hz (VESA)

1024 X 768 @ 70Hz (VESA)

1024 X 768 @ 75Hz (VESA)

1280 X 1024 @ 75Hz (VESA)

(37) Manufacturer's Reserved Timing:

1152 X 870 @ 75Hz (Apple,Mac II)

(38-53) Standard Timing Identification:

1280 X 1024 @60Hz

1280 X 960 @60Hz

1152 X 864 @75Hz

1024 X 768 @85Hz

800 X 600 @85Hz

640 X 480 @85Hz

640 X 400 @70Hz

Not Used

______________________________________________________________________

(54-71) Detailed Timing / Descriptor Block 1:

1280x1024 Pixel Clock: 108.00 MHz

______________________________________________________________________

Horizontal Image Size: 376 mm Vertical Image Size: 301 mm

Refreshed Mode: Non-Interlaced Normal Display - No Stereo

Horizontal:

Active Time: 1280 pixels Blanking Time: 408 pixels

Sync Offset: 48 pixels Sync Pulse Width: 112 pixels

Border: 0 pixels Frequency: 63.98 KHz

Vertical:

Active Time: 1024 lines Blanking Time: 42 lines

Sync Offset: 1 lines Sync Pulse Width: 3 lines

Border: 0 lines Frequency: 60.02 Hz

Digital Separate, Horizontal Polarity (+) Vertical Polarity (+)

______________________________________________________________________

(72-89) Detailed Timing / Descriptor Block 2:

Monitor Serial Number:

PW8050100001

______________________________________________________________________

(90-107) Detailed Timing / Descriptor Block 3:

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Monitor Range Limits:

Min Vertical Freq - 50 Hz

Max Vertical Freq - 85 Hz

Min Horiz. Freq - 30 KHz

Max Horiz. Freq - 82 KHz

Pixel Clock - 140 MHz

Secondary GTF - Not Supported

______________________________________________________________________

(108-125) Detailed Timing / Descriptor Block 4:

Monitor Name:

VA912-4SERIES

(126) No Extension EDID Block(s)

(127) CheckSum OK

6. THEORY OF OPERATION

This section describes the function of the LCD monitor per functional block.

This monitor includes MB board, power/inverter board and button board.

6.1 MB BOARD

The MB board is a two-layer, single-landed. 5V and 12V DC power from the power adapter enters the board

through connector CN1. Other connectors on the board are for audio and button board .The VGA cable is a signal

cable that contains video signal, sync signal and DDC signal from PC VGA adapter. This system board consists of

4 functional areas: flat panel controller, flash ROM, power regulator and Audio amplifier

6.1.1 Flat panel controller… RTD2523 (U6)

The heart of the system board is the scalar chip of RTD2523. The RTD2523 is a high performance, dual input

graphics processing IC for LCD monitors with resolutions up to SXGA. It provides all key IC functions required

for LCD panel. On-chip functions include an 8-bit triple ADC, PLL, DVI receiver, high scaling engine, OSD

controller and dual LVDS transmitter.

a) Clock Generation:

Crystal Input Clock (XIN and XOUT): This is the input pair to an internal crystal oscillator and

corresponding logic. A 24.576 MHz crystal is recommended.

b) Hardware Reset (Pin 56):

Hardware Reset signal is provided to MCU (I1). It is active high.

c) Analog to Digital Converter:

The RTD2523 chip has three ADC's (analog-to-digital converters), one for each color (red, green and

blue) .The analog RGB and synchronous signals are connected to RTD2523 as described below:

Pin Name Pin Number

Red + 37

Red - 38

Green + 34

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Green - 35

Blue + 30

Blue - 31

H sync 42

V sync 43

d) Embedded OSD: Embedded 11.25K SRAM dynamically stores OSD command and fonts.

e) On chip TMDS receiver: The RTD2523 integrated TMDS receiver, which operates up to 165MHz and can

directly connect to all DVI compliant TMDS transmitters. The TMDS signals are connected to RTD2523 as

described bellow:

Pin Name Pin NO.

TX0+ 20

TX0- 21

TX1+ 18

TX1- 17

TX2+ 15

TX2- 14

TXC+ 23

TXC- 24

f) PWM controlling function (Pin 112, Pin 113): The RTD2523 has two dedicated PWM outputs of PWM0

and PWM1 to control audio volume and back light brightness.

g) Serial interface ports (pin 70 and pin 71): This serial interface ports communicate with MCU and support

up to 400Kbit per second transmit rate.

h) Panel interface (Pin 85~94, Pin 73~82,) : The RTD2523 driver interface is highly programmable. It

supports dual /Single LVDS interface output.

6.1.2 Power Regulator AIC1117 (U1, U3): The AIC1117 is a low dropout positive adjustable regulator with

minimum of 800mA output current capability.

So it is well suited for 3.3 V and 2.5 V Regulator.

U3 as a 2.5V regulator, Desired output voltage are determined by the equation

Volt=1.25 x (1 + R17/R15)= 2.5

U1 as a 3.3V regulator, Desired output voltage are determined by the equation

Volt=1.255 x (1+ R6/R3)= 3.3

6.2 Audio Amplifier UTC TDA7496L(U9)

The TDA7496L is a stereo 2W+2W class AB power amplifier; Features of the TDA7496L include linear volume

control, Stand-by and mute functions.

6.3 Power/Inverter Board

This is a specific power/inverter for VA912 monitor 45W 5V + 12V power and backlight which converters

12Vdc to drive four cold cathode fluorescence tubes. Electrical specification described as below.

6.3.1 Inverter Electrical specification described as below.

INPUT

Rated Input Voltage 12Vdc

Input Voltage Range 11.4~12.6Vdc

Input Current <1.96A

Off state Input Power <0.1W

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On / off control Voltage 2~5.25 for on, 0~0.13 for off

OUTPUT

Rated Output Strike-on Voltage 1500~2000Vrms

Rated Output Voltage 710Vrms at 6mA

Rated Output Frequency 40~50KHz

Rated Output Current 6~7mA

6.3.2 Power Electrical specification described as below.

INPUT

Rated Input Voltage 90~264Vac, 47~63Hz

Operation Input Voltage 100~240Vac, 50~60Hz

Input Current <1.8A@90Vac

Inrush Current <100A @ 90Vac(Cold start)

Efficiency 80 % TYPICAL AT 115VAC FULL LOAD

OUTPUT

Output Voltage Regulation +/-5%

Output Ripple and Noise 120 mVp-p

Rated Output Current <4.16A

Turn-on Delay <3 seconds

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5. Adjustment Procedure

1. Function test

(1) Test equipment

Color video signal and pattern generator (or PC with SXGV resolution)

(2) Test condition

Before function testing and alignment, the unit must warm up for at least 30 minutes under the
following conditions:

1. Room temperature

2. With full-white screen , RGB , black pattern

3. with cycled display modes.

2. Test display modes

Item Timing Analog Digital

1 640 x 350 @ 70Hz, 31.5kHz Yes Yes
2 640 x 400 @ 60Hz, 31.5kHz Yes Yes
3 640 x 400 @ 70Hz, 31.5kHz Yes Yes
4 640 x 480 @ 60Hz, 31.5kHz Yes Yes
5 640 x 480 @ 67Hz, 35.0kHz Yes Yes
6 640 x 480 @ 72Hz, 37.9kHz Yes Yes
7 640 x 480 @ 75Hz, 37.5kHz Yes Yes
8 640 x 480 @ 85Hz, 43.27kHz Yes Yes

9 720 x 400 @ 70Hz, 31.5kHz Yes Yes
10 800 x 600 @ 56Hz, 35.1kHz Yes Yes
11 800 x 600 @ 60Hz, 37.9kHz Yes Yes
12 800 x 600 @ 75Hz, 46.9kHz Yes Yes
13 800 x 600 @ 72Hz, 48.1kHz Yes Yes
14 800 x 600 @ 85Hz, 53.7kHz Yes Yes
15 832 x 624 @ 75Hz, 49.7kHz Yes Yes
16 1024 x 768 @ 60Hz, 48.4kHz Yes Yes
17 1024 x 768 @ 70Hz, 56.5kHz Yes Yes
18 1024 x 768 @ 72Hz, 58.1kHz Yes Yes
19 1024 x 768 @ 75Hz, 60.0kHz Yes Yes
20 1024 x 768 @ 85Hz, 68.67kHz Yes Yes
21 1152 x 870 @ 75Hz, 68.7kHz Yes Yes
22 1280 x 1024 @ 60Hz, 63.4kHz Yes Yes
23 1280 x 1024 @ 75Hz, 79.97kHz Yes Yes
24 1280x 720 @ 60Hz, 45kHz (HDTV) Yes Yes

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3. Test pattern

Item Test condition Pattern Specification Remark

1 Frequency & performance Cross-hatch pattern No noise is allowed, all colors must

be clear

2 Monitor saturation 16-gray scale pattern 3 to 4 levels must be saturated when

brightness and contrast are set to
100%

3 RGB color performance RGB color Check the color temperature of

RGB signal color

4 Sub-pixel defect RGB color Check the sub-pixel defect Pattern 3,

5 Full white Full white Check the brightness and contrast

ratio, and check for bright pixel
defects

6 Full black Full black Pattern 7

7. 5-cycle pattern 5-cycle pattern Check the BU Pattern 8

8. 1-dot pattern 1-dot pattern Check the flicker Pattern 9

Pattern 1

Pattern 2

Pattern 3,
4, 5

4 , 5
Pattern 6

Pattern 1 Pattern2

Pattern 3 Pattern4

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Pattern 5 Pattern6

Pattern 7 Pattern 8

Pattern 9

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OSD Function Menu

A. When in Analog Input Mode

1. Main Menu

Press the [1] (Menu) button to enter the Main Menu:
Press the [▲] button to highlight the previous item or the [▼] button to highlight
the next item.
Press the [1] (Menu) button to exit the Main Menu.

(1) Auto Image Adjust Page:

Press the [2] button to execute the auto image adjust function.

Press the [1] button to exit the page.

(2) Contrast/Brightness Page:

Press the [2] button to enter the contrast adjustment page.

Press the [1] button to exit the page.

1) Contrast Item

Press the [▲] button to increase the contrast.
Press the [▼] button to decrease the contrast.
Press the [2] button to enter the brightness adjustment page.
Press the [1] button to exit the page.

2) Brightness Item

Press the [▲] button to increase the brightness.
Press the [▼] button to decrease the brightness.
Press the [2] button to enter the contrast adjustment page.

Press the [1] button to exit the page.

(3) Input Select Page:

Press the [2] button to switch to digital input mode.

(4) Audio Adjust Page:

Press the [▲] button to increase the volume.
Press the [▼] button to decrease the volume.
Press the [2] button to enable or disable mute function .

Press the [1] button to exit the page.

(5) Color Adjust Page:

Press the [2] button to enter the color adjustment page.
Press the [1] button to exit the page.
Press the [▲] button to highlight the previous item or the [▼] button to

highlight the next item.

1) sRGB Item

2) 9300K Item

3) 6500K Item

4) 5400K Item

5) 5000K Item

Press the [2] button to select the currently highlighted item.

Press the [1] button to exit the currently highlighted item.

6) User Color Item
Press the [2] button to enter the user color page.

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Press the [1] button to exit the page.

Red, Green, Blue Options:

Press the [2] button to cycle among the colors.
Press the [1] button to exit the page.
Press the [▲] button to increase the selected color level.

Press the [▼] button to decrease the selected color level.

(6) Information Page:

Press the [2] button to enter the information page.
Press the [1] button to exit the information page.

(7) Manual Image Adjust Page:

Press the [2] button to enter the manual image adjustment page.
Press the [1] button to exit the page.
Press the [▲] button to highlight the previous item or the [▼] button to

highlight the next item.

1) H./V. Position Item

Press the [2] button to enter the horizontal/vertical postion adjustment page.
Press the [1] button to exit the page.

a) Horizontal Position:

Press the [2] button to enter the vertical position adjustment page.

Press the [1] button to exit the page.

Press the [▲] button to shift the image to the right.

Press the [▼] button to shift the image to the left.

b) Vertical Position:

Press the [2] button to return to the horizontal position adjustment page.

Press the [1] button to exit the page.

Press the [▲] button to shift the image upward.

Press the [▼] button to shift the image downward.

2) Horizontal Size Item

Press the [2] button to enter the horizontal size adjustment page.
Press the [1] button to exit the page.
Press the [▲] button to make the image wider.
Press the [▼] button to make the image narrower.

3) Fine tune Item

Press the [2] button to enter the fine tuning page.
Press the [1] button to exit the page.
Press “[▲]” Button to adjust character position in one direction.
Press “[▼]“Button to adjust character position in the other direction.

4) Sharpness Item

Press the [2] button to enter the sharpness adjustment page.
Press the [1] button to exit the page.
Press “[▲]” Button to increase image sharpness.
Press “[▼]“ Button to decrease image sharpness.

(8) Setup Menu Page:

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Press the [2] button to enter the setup menu page.
Press the [1] button to exit the page.
Press the [▲] button to highlight the previous item or the [▼] button to

highlight the next item.

1) Language Select Item

Press the [2] button to enter the language selection page.

Press the [1] button to exit the page.
Press the [▲] button to highlight the previous item or the [▼] button to
highlight the next item.

English, French… Option

Press the [2] button to select the language.
Press the [1] button to exit the page.

2) Resolution Notice Item

Press the [2] button to enter the resolution notice page.

Press the [1] button to exit the page.

Enable, Disable Option

Press the [2] button to select the highlighted option.
Press the [1] button to exit the page.

Press the [▲] button to highlight the previous option or the [▼] button
to highlight the next option.

3) OSD Position Item

Press the [2] button to enter the OSD position adjustment page.

Press the [1] button to exit the page.

a) Horizontal Position Option

Press the [2] button to enter the vertical position adjustment page.

Press the [1] button to exit the page.

Press the [▲] button to shift the menu to the right.

Press the [▼] button to shift the menu to the left.

b) Vertical Position Option:

Press the [2] button to enter the horizontal position adjustment page.

Press the [1] button to exit the page.

Press the [▲] button to shift the menu upward.

Press the [▼] button to shift the menu downward.

4) OSD Time Out Item

Press the [2] button to enter the OSD time out adjustment page.

Press the [1] button to exit the page.

Press the [▲] button to increase the OSD time out.

Press the [▼] button to decrease the OSD time out.

5) OSD Background Item

Press the [2] button to enter the OSD background selection page.

Press the [1] button to exit the page.

Enable, Disable Option

Press the [▲] button to highlight the previous option or the [▼] button
to highlight the next option.

Press the [2] button to select the highlighted option.

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Press the [1] button to exit the page.

(9) Memory Recall Page

Press the [2] button to execute the memory recall function.
Press the [1] button to exit the page.

2. Other Menu:

This “shortcut” menu is directly accessible without bringing up the OSD.

(1) Contrast Dialog

Press the [▲] or [▼] button to enter the Contrast Dialog.

Press the [1] button to exit the Contrast Dialog.

Press the [2] button to enter the Brightness Dialog.
Press the [▲] button to increase the contrast.

Press the [▼] button to decrease the contrast.

(2) Brightness Dialog

Press the [▲] or [▼] button to enter the Brightness Dialog.

Press the [1] button to exit the Brightness Dialog.

Press the [2] button to enter the Contrast Dialog.
Press the [▲] button to increase the brightness.

Press the [▼] button to decrease the brightness.

(3) Analog/Digital Dialog

Press the [2] button to toggle between analog and digital modes.

B. When in Digital Input Mode

1. Main Menu

Press the [1] (Menu) button to enter the Main Menu:
Press the [▲] button to highlight the previous item or the [▼] button to highlight
the next item.
Press the [1] (Menu) button to exit the Main Menu.

(1) Auto Image Adjust Page:

Press the [2] button to execute the auto image adjust function.
Press the [1] button to exit the page.

(2) Contrast/Brightness Page:

Press the [2] button to enter the contrast adjustment page.
Press the [1] button to exit the page.

1) Contrast Item

Press the [▲] button to increase the contrast.
Press the [▼] button to decrease the contrast.
Press the [2] button to enter the brightness adjustment page.
Press the [1] button to exit the page.

2) Brightness Item

Press the [▲] button to increase the brightness.
Press the [▼] button to decrease the brightness.
Press the [2] button to enter the contrast adjustment page.

Press the [1] button to exit the page.

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(3) Input Select Page:

Press the [2] button to switch to analog input mode.

(4) Audio Adjust Page:

Press the [▲] button to increase the volume.
Press the [▼] button to decrease the volume.
Press the [2] button to enable or disable mute function .

Press the [1] button to exit the page.

(4) Color Adjust Page:

Press the [2] button to enter the color adjustment page.
Press the [1] button to exit the page.
Press the [▲] button to highlight the previous item or the [▼] button to

highlight the next item.

1) sRGB Item

2) 9300K Item

3) 6500K Item

4) 5400K Item

5) 5000K Item

Press the [2] button to select the currently highlighted item.

Press the [1] button to exit the currently highlighted item.

6) User Color Item
Press the [2] button to enter the user color page.
Press the [1] button to exit the page.

Red, Green, Blue Options:

Press the [2] button to cycle among the colors.
Press the [1] button to exit the page.
Press the [▲] button to increase the selected color level.

Press the [▼] button to decrease the selected color level.

(5) Information Page:

Press the [2] button to enter the information page.
Press the [1] button to exit the information page.

(6) Manual Image Adjust Page:

Press the [2] button to enter the manual image adjustment page.
Press the [1] button to exit the page.
Press the [▲] button to highlight the previous item or the [▼] button to

highlight the next item.

1) Sharpness Item

Press the [2] button to enter the sharpness adjustment page.
Press the [1] button to exit the page.
Press “[▲]” Button to increase image sharpness.
Press “[▼]“ Button to decrease image sharpness.

(7) Setup Menu Page:

Press the [2] button to enter the setup menu page.
Press the [1] button to exit the page.

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Press the [▲] button to highlight the previous item or the [▼] button to

highlight the next item.

1) Language Select Item

Press the [2] button to enter the language selection page.

Press the [1] button to exit the page.
Press the [▲] button to highlight the previous item or the [▼] button to
highlight the next item.

English, French… Option

Press the [2] button to select the language.
Press the [1] button to exit the page.

2) Resolution Notice Item

Press the [2] button to enter the resolution notice page.

Press the [1] button to exit the page.

Enable, Disable Option

Press the [2] button to select the highlighted option.
Press the [1] button to exit the page.

Press the [▲] button to highlight the previous option or the [▼] button
to highlight the next option.

3) OSD Position Item

Press the [2] button to enter the OSD position adjustment page.

Press the [1] button to exit the page.

a) Horizontal Position Option

Press the [2] button to enter the vertical position adjustment page.

Press the [1] button to exit the page.

Press the [▲] button to shift the menu to the right.

Press the [▼] button to shift the menu to the left.

b) Vertical Position Option:

Press the [2] button to enter the horizontal position adjustment page.

Press the [1] button to exit the page.

Press the [▲] button to shift the menu upward.

Press the [▼] button to shift the menu downward.

4) OSD Time Out Item

Press the [2] button to enter the OSD time out adjustment page.

Press the [1] button to exit the page.

Press the [▲] button to increase the OSD time out.

Press the [▼] button to decrease the OSD time out.

5) OSD Background Item

Press the [2] button to enter the OSD background selection page.

Press the [1] button to exit the page.

Enable, Disable Option

Press the [▲] button to highlight the previous option or the [▼] button
to highlight the next option.

Press the [2] button to select the highlighted option.

Press the [1] button to exit the page.

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(8) Memory Recall Page

Press the [2] button to execute the memory recall function.
Press the [1] button to exit the page.

2. Other Menu:

This “shortcut” menu is directly accessible without bringing up the OSD.

(1) Contrast Dialog

Press the [▲] or [▼] button to enter the Contrast Dialog.

Press the [1] button to exit the Contrast Dialog.

Press the [2] button to enter the Brightness Dialog.
Press the [▲] button to increase the contrast.

Press the [▼] button to decrease the contrast.

(2) Brightness Dialog

Press the [▲] or [▼] button to enter the Brightness Dialog.

Press the [1] button to exit the Brightness Dialog.

Press the [2] button to enter the Contrast Dialog.
Press the [▲] button to increase the brightness.

Press the [▼] button to decrease the brightness.

(3) Analog/Digital Dialog

Press the [2] button to toggle between analog and digital modes.

C. Other Information

When the “No Signal” or “Out of Range” messages appear:

If no input signal is detected, the “No Signal” message will appear in the center of
the screen.
If the V-Sync signal rate is greater than than 85Hz or its resolution is greater than
SXGA, the “Out of Range” message will appear in the center of the screen.

Activating Factory Mode and Burn Mode:

While the device is in standby, press the [2] button, then press the power button to
enter Factory Mode. While Factory Mode is active, an additional menu page titled
“Factory Menu” will be accessible. Press the [2] button to enter the Factory Menu
page, then press the [2] button to enter Burn Mode.

When Installing a New Main Board

1. Enter Factory Mode.

2. Use a PC or chrom to send a 32-tone gray scale signal to the monitor.

3. Select “Auto Color”

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6. Troubleshooting

No power

No Power

Check CN1 pin 5,6

5V correct?

OK

Check U1 pin2

Output 3.3V?

OK

Check U3 pin 2

Output 2.5V?

OK

Check X’tal Y1=24.576MHz?

And Y2=11.092MHz?

No

No

No

No

Change power

board module

Change U1.

Change U3

Change Y1 or Y2

OK

Check button cable

No

& button board?

Change cable or

button board

OK

Change M/B

ViewSonic Corporation Confidential

34

-

Do Not Copy VA912/b-4

y

)

Q

No Audio

No Audio Output

Check Input

Signal J3 OK?

No

Check Input source
or Change J3

OK

Check JP2 to

Speaker OK?

No

Change Speaker or

JP2(Cable)

OK

Check CN1 pin

1,2=12V?

No

Change power
board module

OK

Check U9(pin6)

Volume and

15

No

Change Q15

OK

Check U9

pin12(Mute),pin11(

Stb

No

Change U9

OK

Change M/B

ViewSonic Corporation Confidential

35

-

Do Not Copy VA912/b-4

p

Display color abnormal:

Display color abnormal

Check panel

cable?

No

Change panel cable

OK

Check open/short

of U6

No

Repair open/short

OK

Check panel

ower supplyof

No

Change Q8

OK

Check panel

No

Change panel

OK

Change M/B

ViewSonic Corporation Confidential

36

-

Do Not Copy VA912/b-4

front bezel ass'y

1

C-00004172

back cover

1

CB-00004149

Audio cable

1

CB-00002602

VGA cable

1

Screw

6

M-MS-0808-9682

JXL9V001010

LCD FILM

1

cushion

1

cushion

1

RECOMMENDED SPARE PARTS LIST (VA912-4)

ViewSonic Model Number: VS10867-1W

7. Recommended Spare Parts List

Rev: 1a

Serial No. Prefix: PW7

Item ECR/ECN ViewSonic P/N Ref. P/N Location Universal number# Q'ty

Accessories:

1

Board Assembly:

2 Power board B-00003993 AS05B312D00 Power board 1
3 Main Board B-00004169 21L9TAMB090 Main board 1
4 Button board B-00004170 23L9VABB003 Button board 1

Cabinets:

5 Front bezel assy C-00004171
6 Base Assembly C-00004147 38W0VABS010 base assy 1
7

Cables:

8 Cable MB-LCD CB-00002525 DD0L9VLC015 Cable MB-LCD 1

9
10
11 Cable MB-BB CB-00004173 DDL9VABU001 Cable MB-BB 1

Documentation:

12

Electronic

13 19" HSD TFT LCD panel E-00004175 AA90ME13006 LCD panel (2nd source) 1

Components:

14 19" HSD TFT LCD panel E-00004176 AA90ME13014 LCD panel 1
15 Speaker assy E-00004177 DN0TE200F00 speaker assy 1

Hardware:

16 Screw M3.0*4.0-I(NI) GP M-SCW-0824-6802 MM30040IBJ9 Screw 8
17 Screw M3.0*6, B(NI) GP M-SCW-0824-0814
18 Screw F4.0*14-I(BNI) GP HW-00004157 MF40140IJ29 Screw 7

Miscellaneous:

19

Packing Material:

20 EPE bags M-MS-0808-9158 HAL7V002019 EPE bags 1
21 Carton P-00004178 HFL9VA02013 carton 1
22 End cap (L) P-00004179
23 End cap (R) P-00004180

Plastics:

24

Description

Power cable A-00003642 DM33T181004 Power cable 1

24L9VALB012

Back Cover Assembly

Audio cable
VGA cable

User manual + CD wizard DC-00004174 HFL9VA02013 User manual 1

LCD film

Stand assy PL-00004163 26W0VASA016 Stand ASSY 1

25L9VALC010

DD0L0TPC007

DDL7VDPC005

MM30060BBJ3

HBL9VA01013
HBL9VA02010

ViewSonic Corporation Confidential

37

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Do Not Copy VA912/b-4

Rev: 1a

Serial No. Prefix: PW8

RECOMMENDED SPARE PARTS LIST (VA912b-4)

ViewSonic Model Number: VS10867-1W

Item ECR/ECN ViewSonic P/N Ref. P/N Location Universal number# Q'ty

Accessories:

1

Board Assembly:

2 Power board B-00003993 AS05B312D00 Power board 1
3 Main Board B-00004169 21L9TAMB090 Main board 1
4 Button board B-00004170 23L9VABB003 Button board 1

Cabinets:

5 Front bezel assy C-00004181
6 Base Assy C-00004165 38W0VABS001 base assy 1
7

Cables:

8 Cable MB-LCD CB-00002525 DD0L9VLC015 Cable MB-LCD 1
9 Audio cable CB-00004149 DD0L0TPC007 Audio cable 1

10 VGA cable CB-00002602 DDL7VDPC005 VGA cable 1
11 Cable MB-BB CB-00004173 DDL9VABU001 Cable MB-BB 1

Documentation:

12

Electronic

13 19" HSD TFT LCD panel E-00004175 AA90ME13006

Components:

14 19" HSD TFT LCD panel E-00004176 AA90ME13014 LCD panel 1
15 Speaker assy E-00004177 DN0TE200F00 speaker assy 1

Hardware:

16 Screw M3.0*4.0-I(NI) GP M-SCW-0824-6802 MM30040IBJ9 Screw 8
17 Screw M3.0*6, B(NI) GP M-SCW-0824-0814
18 Screw F4.0*14-I(BNI) GP HW-00004157 MF40140IJ29 Screw 7

Miscellaneous:

19

Packing Material:

20 PE bags P-00004159 HAL0T002019 PE bags 1
21 Carton P-00004183 HFL9VA01017 carton 1
22 End cap (L) P-00004179
23 End cap (R) P-00004180

Plastics:

24

Description

Power cable A-00003642 DM33T181004 Power cable 1

24L9VALB004

Back Cover Assy

User manual + CD wizard DC-00004174 HFL9VA02013 User manual 1

LCD film M-MS-0808-9682 JXL9V001010 LCD FILM 1

Stand assy PL-00004168 26W0VASA008 Stand ASSY 1

C-00004182

25L9VALC001

MM30060BBJ3

HBL9VA01013
HBL9VA02010

front bezel ass'y 1

back cover 1

Screw 6

cushion 1
cushion 1

1

ViewSonic Corporation Confidential

38

-

Do Not Copy VA912/b-4

ViewSonic Model Number: VS10867-1W

Item

ViewSonic P/N

Ref. P/N

Description

Location

Universal number#

Q'ty

1

#N/A

1L9VAZXVS09

L9VA LCD MONITOR(USA) GP

2

B-00004169

21L9TAMB090

L9TA M/B ASSY(RTD2523-LF) GP

13#N/A

31L9TASS079

L9TA M/B S/S ASSY(RTD2523-LF) GP

1

,EC3,EC5,EC6

5

#N/A

CC71004MD68

CAP EC 100U 25V(+-20%,105C,6*11,LESR) GP

C70

1

7,C99,EC1

7

#N/A

BG611059327

XTAL DIP 11.0592MHZ(+-30PPM,49/US) GP

Y218

#N/A

BG624576104

XTAL DIP 24.576MHZ(+-30PPM,49/S) GP

Y119

#N/A

AL007496D29

IC(20P) UTC TDA7496LK(DIP) GP

U9110

#N/A

DFPJ05FR153

CONN DIP PHONE JACK 5P FR(H10)248C GP

J3111

#N/A

DFHD04MR132

CONN DIP HEADER 4P 1R MR(P2.0,H4.1) GP

JP2112

#N/A

DFHD10MR324

CONN DIP HEADER 10P 1R MR(P2.0,H4.1) GP

CN6113

#N/A

DFHD30MR267

CONN DIP HEADER 30P 2R MR(P2.0,H4.0) GP

CN5114

#N/A

DFHD08FR102

CONN DIP HEADER 8P 2R FR(P2.54,H5.0) GP

CN1115

#N/A

DFDS15FR076

CONN D-SUB 15P 3R FR(P1.15,H12.55) GP

CN2116

#N/A

DFDI24FR108

CONN DIP DVI 24P 3R FR(P1.905,H10.04) GP

CN4117

B-00004170

23L9VABB003

L9VA BUTTON/B ASSY GP

118#N/A

DAL9VATB115

PCB(BUTTON)L9VA TB(1L,204*16,REVA) GP

119#N/A

BEYG0014DA0

LED(DIP) YELLOW/GREEN(L-3WYGW-F01) GP

LED1120

#N/A

DFHD10MR324

CONN DIP HEADER 10P 1R MR(P2.0,H4.1) GP

CN1

1

SW4,SW5,SW6

22

B-00003993

AS05B312D00

ADP/INV,FSP043-2PI01 90~264V GP

123C-00004181

24L9VALB004

L9VA LCD BEZEL ASSY GP

124#N/A

34L9VALB004

L9VA LCD BEZEL SUB ASSY GP

125#N/A

36L9VAPS001

L9VA PCB SHIELDING ASSY GP

126#N/A

FAL9VA01012

LCD BKT-L L9VA(FAL9VA01,REV3A) GP

127#N/A

FAL9VA02019

LCD BKT-R L9VA(FAL9VA02,REV3A) GP

128#N/A

FCL7B001018

POWER BOARD MYLAR

129#N/A

FCM7T004014

AL FOIL M7T(FCM7T004,REV3A) GP

330M-SCW-0824-6802

MM30040IBJ9

SCREW M3.0*4.0-I(NI) GP

831M-SCW-0824-0814

MM30060BBJ3

SCREW M3.0*6,B(NI) GP

632M-MS-0808-8986

MBLI1004018

IO NUT LI1(MBLI1004,REV3A)

433#N/A

MS35080B456

SCREW F3.5*8-B(NI)(WASHER)GP

134CB-00002525

DD0L9VLC015

CABLE MB-LCD(30P,140MM)L9V-5 GP

135CB-00004152

DD0L9VLC023

CABLE LVDS(30P,140MM,LINKTEC,AU)L9VA GP

136CB-00004173

DDL9VABU001

CABLE MB-BUTTON(10P/10P,280MM)L9VA GP

137E-00004177

DN0TE200F00

SPEAK ASSY L9VA FG-TE200 1.5W*2 GP

138#N/A

FCL5M005011

AL FOIL(PANEL) L5M(FCL5M005,REV 3A)

239M-MS-0808-9247

EBL70023013

WIRE MOUNTS L70L-E(EBL70023,REV3A) GP

140#N/A

GAL7TA01016

RUBBER FOOT L7TA(GAL7TA01,REV3A)

241#N/A

25L9VALC001

L9VA LCD COVER ASSY GP

142#N/A

EAL9VA02019

LCD COVER L9VA(EAL9VA02,REV3A) GP

143#N/A

FBL9VA01013

HINGE-PLATE L9VA(FBL9VA01,REV3A) GP

144M-MS-0808-9411

FBL70008014

LOCK METAL L70B(FBL70008,REV3A) GP

145PL-00004168

26W0VASA008

W0VA STAND ASSY GP

146#N/A

EAW0VA03011

STAND-FRONT W0VA(EAW0VA03,REV3A)GP

147#N/A

EAW0VA05013

STAND-BACK W0VA(EAW0VA05,REV4A)GP

148#N/A

FAW0VA04017

HINGE ASSY W0VA(FAW0VA04,REV3A)GP

149#N/A

FBW0VA02015

CONTACT-PLATE W0VA(FBW0VA02,REV3A)GP

150HW-00004157

MF40140IJ29

SCREW F4.0*14-I(BNI) GP

751#N/A

DDL9TATH107

CABLE STAND-HINGE(1P,150MM) GP

152M-SCW-0824-6895

MF40080IBJ1

SCREW F4.0*8-I(NI)GP

153#N/A

27L9VACS001

L9VA CHASSIS ASSY GP

154#N/A

EBL9VA02010

HINGE COVER L9VA(EBL9VA02,REV3A) GP

155#N/A

GAW0VA02014

RUBBER PLUG VESA (GAW0VA02,R3A)GRAY GP

456M-SCW-0824-6797

MF40080BJ29

SCREW F4.0*8-B(BNI) GP

257#N/A

MM40100BL61

SCREW M4*10.0-B(BNI,NYLOK) GP

658#N/A

2AL9VAPTU02

L9VA PANEL KIT ASSY(HSD 8MS) GP

159E-00004175

AA90ME13006

LCD(TFT) HSD190ME13-A02(8MS)GP

160E-00004176

AA90ME13014

LCD(TFT)19" HSD190ME13-A03 GP

161#N/A

AZL9VA0U001

L9VA SW BIOS IMAGE (W/AUDIO) FOR HSD

162#N/A

28L9VAPK008

L9VA PACKING ASSY GP

163C-00004165

38W0VABS001

W0VA BASE SUB ASSY GP

164CB-00002602

DDL7VDPC005

CABLE MB-VGA (15/15P,1.8M)L7VD GP

165CB-00003440

DD0L0TTH108

CABLE ASSY L0T MB-DVI(24P,REV2A) GP

166CB-00004149

DD0L0TPC007

CABLE AUDIO(ST,1.8M)BLACK L0T GP

167P-00004179

HBL9VA01013

END CAP-L L9VA(HBL9VA01,REV3A) GP

168P-00004180

HBL9VA02010

END CAP-R L9VA(HBL9VA02,REV3A) GP

169M-LB-0813-0747

HCL7V004013

CORE LABEL(HCL7V004,REV3A)

1

Rev: 1a

Serial No. Prefix: PW7

BOM LIST (VA912-4)

4 #N/A CC62204MD23 CAP EC 22U 25V(+-20%,105C,5*11,2KHR)GP

6 #N/A CC73303MD51 CAP EC 330U 16V(+-20%,105C,8*11,2KH)GP

21 PL-BT-0706-0127 DHP0002B108 SWITCH PUSH BUTTON(PT-002-B1,50MA,12V)GP

C34,C46,C50,C
53,C59,C84,EC2

C6,C91,C93,C9

SW1,SW2,SW3,

10

6

6

ViewSonic Corporation Confidential

39

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Do Not Copy VA912/b-4

Item

ViewSonic P/N

Ref. P/N

Description

Location

Universal number#

Q'ty

70

#N/A

HCL9VA01014

ID LABEL L9VA(HCL9VA01,REV3A) GP

171M-LB-0813-0745

HCL7V002011

SERIAL LEBAL L7V(HCL7V002,REV3A) GP

172#N/A

HCL9VA02011

CARTON LABEL(4) L9VA(HCL9VA02,R3A) GP

173P-00004183

HFL9VA01017

CARTON L9VA(HFL9VA01,REV3A) GP

174#N/A

HGL9VA01018

CD+QSG L9VA(HGL9VA01,REV3A) GP

175#N/A

JXLM5003011

HANDLE LM5S(JXLM5003,REV 3B) GP

176M-MS-0808-9682

JXL9V001010

LCD FILM L9V(JXL9V001,REV3A) GP

177M-LB-0813-1043

HCL70021011

HI-POT LABEL L70L(HCL70021,REV3A)

178#N/A

HFL9T002018

SPACE PLATE L9T(HFL9T002,REV3A)

0.02779P-00004159

HAL0T002019

PE BAG L0T(HAL0T002,REV3A)

180#N/A

HDL7VC01019

SERVICR PAPER L7VC(HDL7VC01,REV3A) GP

181DC-00003536

HCL9V009011

HG LABEL L9VD(HCL9V009,REV3A)

182A-PC-0106-0224

DM333181G97

POWER CORD 3P 1.8M(USA)V04VS350012180 GP

1

ViewSonic Corporation Confidential

40

-

Do Not Copy VA912/b-4

Item

ViewSonic P/N

Ref. P/N

Description

Location

Universal number#

Q'ty

C34,C46,C50,C53,C59,

CONN D-SUB 15P 3R FR(P1.15,H12.55) GP

16

#N/A

DFDI24FR108

CONN DIP DVI 24P 3R FR(P1.905,H10.04) GP

CN4117

B-00004170

23L9VABB003

L9VA BUTTON/B ASSY GP

118#N/A

DAL9VATB115

PCB(BUTTON)L9VA TB(1L,204*16,REVA) GP

119#N/A

BEYG0014DA0

LED(DIP) YELLOW/GREEN(L-3WYGW-F01) GP

LED1120

#N/A

DFHD10MR324

CONN DIP HEADER 10P 1R MR(P2.0,H4.1) GP

CN1

1

B1,50MA,12V)GP

W5,SW6

29

M-MS-0808-9243

FEL7V003019

LOGO FRONT-VSC-38MM

1

35

#N/A

FCL7B001018

POWER BOARD MYLAR

1

IO NUT LI1(MBLI1004,REV3A)

SCREW F3.5*8-B(NI)(WASHER)GP

42

CB-00004152

DD0L9VLC023

CABLE LVDS(30P,140MM,LINKTEC,AU)L9VA

1

RUBBER FOOT L7TA(GAL7TA01,REV3A)

LCD COVER L9VA B(EAL9VA02,R3A) GP

LOCK METAL L70B(FBL70008,REV3A) GP

W0VA STAND ASSY (S/B) GP

STAND FRONT W0VA(EAW0VA03,R3A)BK GP

STAND-BACK W0VA(EAW0VA05,R3A)BK GP

BOM LIST (VA912b-4)

ViewSonic Model Number: VS10867-1W

Rev: 1a

Serial No. Prefix: PW8

1 #N/A 1L9VAZXVS92 L9VA LCD MONITOR(TWN)S/B GP
2 B-00004169 21L9TAMB090 L9TA M/B ASSY(RTD2523-LF) GP 1
3 #N/A 31L9TASS079 L9TA M/B S/S ASSY(RTD2523-LF) GP 1

4 #N/A CC62204MD23 CAP EC 22U 25V(+-20%,105C,5*11,2KHR)GP

5 #N/A CC71004MD68 CAP EC 100U 25V(+-20%,105C,6*11,LESR) GP C70 1
6 #N/A CC73303MD51 CAP EC 330U 16V(+-20%,105C,8*11,2KH)GP C6,C91,C93,C97,C99,E 6
7 #N/A BG611059327 XTAL DIP 11.0592MHZ(+-30PPM,49/US) GP Y2 1
8 #N/A BG624576104 XTAL DIP 24.576MHZ(+-30PPM,49/S) GP Y1 1
9 #N/A AL007496D29 IC(20P) UTC TDA7496LK(DIP) GP U9 1

10 #N/A DFPJ05FR153 CONN DIP PHONE JACK 5P FR(H10)248C GP J3 1

11 #N/A DFHD04MR132 CONN DIP HEADER 4P 1R MR(P2.0,H4.1) GP JP2 1

12 #N/A DFHD10MR324 CONN DIP HEADER 10P 1R MR(P2.0,H4.1) GP CN6 1

13 #N/A DFHD30MR267

14 #N/A DFHD08FR102 CONN DIP HEADER 8P 2R FR(P2.54,H5.0) GP CN1 1
15 #N/A DFDS15FR076

21 PL-BT-0706-0127 DHP0002B108
22 B-00003993 AS05B312D00 ADP/INV,FSP043-2PI01 90~264V GP 1

23 C-00004171 24L9VALB012 L9VA-U LCD BEZEL ASSY (S/B) GP 1
24 #N/A 34L9VALB012 L9VA-U LCD BEZEL SUB ASSY (S/B) GP 1
25 #N/A EAL9VA01021 LCD BEZEL L9VA S(EAL9VA01,R3A) GP 1
26 #N/A EBL9VA01013 FUNCTION BUTTON L9VA(EBL9VA01,REV3A) 1
27 #N/A EBW0VA02015 LENS W0VA(EBW0VA02,REV3A)GP 1
28 M-MS-0808-9244 FEL7V004015 BIRD LOGO-10MM L7VC(FEL7V004,REV3A) 1

CONN DIP HEADER 30P 2R MR(P2.0,H4.0) GP

SWITCH PUSH BUTTON(PT-002-

C84,EC2,EC3,EC5,EC6 10

CN5 1

CN2 1

SW1,SW2,SW3,SW4,S

6

30 #N/A 36L9VAPS001 L9VA PCB SHIELDING ASSY GP 1
31 #N/A FCL7TA01018 SHIELDING MYLAR L7TA(FCL7TA01,R3A)GP 1
32 #N/A FAL7TA08011 SHIELDING L9VA(FAL7TA08,REV3A)DUAL GP 1
33 #N/A FAL9VA01012 LCD BKT-L L9VA(FAL9VA01,REV3A) GP 1
34 #N/A FAL9VA02019 LCD BKT-R L9VA(FAL9VA02,REV3A) GP 1

36 #N/A FCM7T004014 AL FOIL M7T(FCM7T004,REV3A) GP 3
37 M-SCW-0824-6802 MM30040IBJ9 SCREW M3.0*4.0-I(NI) GP 8
38 M-SCW-0824-0814 MM30060BBJ3 SCREW M3.0*6,B(NI) GP 6
39 M-MS-0808-8986 MBLI1004018
40 #N/A MS35080B456
41 CB-00002525 DD0L9VLC015 CABLE MB-LCD(30P,140MM)L9V-5 GP 1

43 CB-00004173 DDL9VABU001 CABLE MB-BUTTON(10P/10P,280MM)L9VA GP 1
44 E-00004177 DN0TE200F00 SPEAK ASSY L9VA FG-TE200 1.5W*2 GP 1
45 #N/A FCL5M005011 AL FOIL(PANEL) L5M(FCL5M005,REV 3A) 2
46 M-MS-0808-9247 EBL70023013 WIRE MOUNTS L70L-E(EBL70023,REV3A) GP 1
47 #N/A GAL7TA01016
48 C-00004172 25L9VALC010 L9VA-U LCD COVER ASSY (S/B) GP 1
49 #N/A EAL9VA02027
50 #N/A FBL9VA01013 HINGE-PLATE L9VA(FBL9VA01,REV3A) GP 1
51 M-MS-0808-9411 FBL70008014
52 PL-00004163 26W0VASA016
53 #N/A EAW0VA03029
54 #N/A EAW0VA05021
55 #N/A FAW0VA04017 HINGE ASSY W0VA(FAW0VA04,REV3A)GP 1
56 #N/A FBW0VA02015 CONTACT-PLATE W0VA(FBW0VA02,REV3A)GP 1
57 HW-00004157 MF40140IJ29 SCREW F4.0*14-I(BNI) GP 7
58 #N/A DDL9TATH107 CABLE STAND-HINGE(1P,150MM) GP 1
59 #N/A 27L9VACS019 L9VA-U CHASSIS ASSY (S/B) GP 1
60 #N/A EBL9VA02028 HINGE COVER L9VA B(EBL9VA02,R3A) GP 1
61 M-MS-0808-9815 GAL9V002014 RUBBER PLUG VESA L9V(GAL9V002,REV3A) 4
62 M-SCW-0824-6797 MF40080BJ29 SCREW F4.0*8-B(BNI) GP 2
63 #N/A MM40100BL61 SCREW M4*10.0-B(BNI,NYLOK) GP 6
64 #N/A 2AL9VAPTU02 L9VA PANEL KIT ASSY(HSD 8MS) GP 1
65 E-00004175 AA90ME13006 LCD(TFT) HSD190ME13-A02(8MS)GP 1

ViewSonic Corporation Confidential

41

-

Do Not Copy VA912/b-4

4
1

2

1

1
1
1
1

Item

ViewSonic P/N

Ref. P/N

Description

Location

Universal number#

Q'ty

66 E-00004176 AA90ME13014 LCD(TFT)19" HSD190ME13-A03 GP 1

L9VA SW BIOS IMAGE (W/AUDIO) FOR HSD

L9VA-U PACKING ASSY (S/B) GP

EPE BAG L7VX(HAL7V002,REV3A) GP

67 #N/A AZL9VA0U001
68 #N/A 28L9VAPK016
69 C-00004147 38W0VABS010 W0VA BASE SUB ASSY (S/B) GP 1
70 M-MS-0808-9158 HAL7V002019
71 P-00004179 HBL9VA01013 END CAP-L L9VA(HBL9VA01,REV3A) GP 1
72 P-00004180 HBL9VA02010 END CAP-R L9VA(HBL9VA02,REV3A) GP 1
73 M-LB-0813-0747 HCL7V004013 CORE LABEL(HCL7V004,REV3A) 1
74 #N/A HCL9VA03017 ID LABEL(S) L9VA(HCL9VA03,REV3A) GP 1
75 M-LB-0813-0745 HCL7V002011 SERIAL LEBAL L7V(HCL7V002,REV3A) GP 1
76 DC-00004174 HFL9VA02013 CARTON(S) L9VA(HFL9VA02,REV3A) GP 1
77 #N/A HGL9VA01018 CD+QSG L9VA(HGL9VA01,REV3A) GP 1
78 #N/A JXLM5003011 HANDLE LM5S(JXLM5003,REV 3B) GP 1
79 M-MS-0808-9682 JXL9V001010 LCD FILM L9V(JXL9V001,REV3A) GP 1
80 M-LB-0813-1043 HCL70021011 HI-POT LABEL L70L(HCL70021,REV3A) 1
81 #N/A HFL9T002018 SPACE PLATE L9T(HFL9T002,REV3A) 0.027
82 M-00002264 HCL7V028010 8MS STICKER L7VC(HCL7V028,REV3A) 1
83 CB-00002602 DDL7VDPC005 CABLE MB-VGA (15/15P,1.8M)L7VD GP 1
84 CB-00004149 DD0L0TPC007 CABLE AUDIO(ST,1.8M)BLACK L0T GP 1
85 #N/A HCL9VA02011 CARTON LABEL(4) L9VA(HCL9VA02,R3A) GP 1
86 A-00003642 DM33T181004 POWER CORD SP-305+IS-14 3P 1.8M(TWN)B GP 1

1
1

1

ViewSonic Corporation Confidential

42

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Do Not Copy VA912/b-4

8. Exploded Diagram and Exploded Parts List

ViewSonic Corporation Confidential

43

-

Do Not Copy VA912/b-4

ViewSonic Corporation

Model

Title
Date Rev:

Rev: 1a

EXPLODED PARTS LIST (VA912-4)

ViewSonic Model Number: VS10867-1W

Serial No. Prefix: PW7

Item ViewSonic P/N Ref. P/N Description Q'ty

1 B-00004169 21L9TAMB090 L9TA M/B ASSY(RTD2523-LF) GP 1
2 B-00003993 AS05B312D00 ADP/INV,FSP043-2PI01 90~264V GP 1
3 B-00004170 23L9VABB003 L9VA BUTTON/B ASSY GP 1
4 #N/A EAL9VA01012 LCD BEZEL L9VA GP 1
5 #N/A EBL9VA01013 FUNCTION BUTTON L9VA GP 1
6 #N/A EBW0VA02015 LENS W0VA GP 1
7 M-MS-0808-9244 FEL7V004015 BIRD LOGO-10MM L7VC 1
8 M-MS-0808-9243 FEL7V003019 LOGO FRONT-VSC-38MM L7VC 1

9 #N/A FCL7TA01018 SHIELDING MYLAR L7TAGP 1
10 #N/A FAL7TA08011 SHIELDING L9VA DUAL GP 1
11 #N/A FAL9VA01012 LCD BKT-L L9VA GP 1
12 #N/A FAL9VA02019 LCD BKT-R L9VA GP 1
13 #N/A FCL7B001018 POWER BOARD MYLAR L7B GP 1
14 #N/A FCM7T004014 AL FOIL M7T GP 3
15 M-SCW-0824-6802 MM30040IBJ9 SCREW M3.0*4.0-I(NI) GP 8
16 M-SCW-0824-0814 MM30060BBJ3 SCREW M3.0*6,B(NI) GP 6
17 M-MS-0808-8986 MBLI1004018 IO NUT LI1 GP 4
18 #N/A MS35080B456 SCREW F3.5*8-B(NI)(WASHER) 1
19 CB-00002525 DD0L9VLC015 CABLE MB-LCD(30P,140MM)L9V-5 GP 1
20 CB-00004173 DDL9VABU001 CABLE MB-BUTTON(10P/10P,280MM)L9VA GP 1
21 E-00004177 DN0TE200F00 SPEAK ASSY L9VA FG-TE200 1.5W*2 GP 1
22 #N/A FCL5M005011 AL FOIL(PANEL) L5M 2
23 M-MS-0808-9247 EBL70023013 WIRE MOUNTS L70L-E GP 1
24 #N/A GAL7TA01016 RUBBER FOOT L7TA 2
25 #N/A EAL9VA02019 LCD COVER L9VA GP 1
26 #N/A FBL9VA01013 HINGE-PLATE L9VA GP 1
27 M-MS-0808-9411 FBL70008014 LOCK METAL L70B GP 1
28 #N/A EAW0VA03011 STAND-FRONT W0VA GP 1
29 #N/A EAW0VA05013 STAND-BACK W0VA GP 1
30 #N/A FAW0VA04017 HINGE ASSY W0VA GP 1
31 #N/A FBW0VA02015 CONTACT-PLATE W0VA GP 1
32 HW-00004157 MF40140IJ29 SCREW F4.0*14-I(BNI) GP 7
33 #N/A DDL9TATH107 CABLE STAND-HINGE(1P,150MM) GP 1
34 M-SCW-0824-6895 MF40080IBJ1 SCREW F4.0*8-I(NI) GP 1
35 #N/A EBL9VA02010 HINGE COVER L9VA GP 1
36 #N/A GAW0VA02014 RUBBER PLUG VESA W0VA GRAY GP 4
37 M-SCW-0824-6797 MF40080BJ29 SCREW F4.0*8-B(BNI)GP 2
38 #N/A MM40100BL61 SCREW M4*10.0-B(BNI,NYLOK) GP 6
39 #N/A EAW0VA04017 BASE W0VA GP 1
40 E-00004175 AA90ME13006 LCD(TFT)HSD 190ME13-A02(8MS) A GP 1
41 #N/A FBW0VA03011 BASE-PLATE W0VA GP 1
42 #N/A GAW0VA03011 RUBBER FOOT-C W0VA GP 2
43 #N/A GAW0VA01018 RUBBER FOOT W0VA GP 2
44 #N/A HCL9VA01014 ID LABEL L9VA GP 1
45 M-LB-0813-0745 HCL7V002011 SERIAL LABAL L7V GP 1
46 M-MS-0808-9682 JXL9V001010 LCD FILM L9V GP 1

ViewSonic Corporation Confidential

44

-

Do Not Copy VA912/b-4

ViewSonic Model Number: VS10867-1W

EXPLODED PARTS LIST (VA912b-4)

Rev: 1a

Serial No. Prefix: PW8

Item ViewSonic P/N Ref. P/N Description Q'ty

1 B-00004169 21L9TAMB090 L9TA M/B ASSY(RTD2523-LF) GP 1

2 B-00003993 AS05B312D00 ADP/INV,FSP043-2PI01 90~264V GP 1

3 B-00004170 23L9VABB003 L9VA BUTTON/B ASSY GP 1

4 #N/A EAL9VA01021 LCD BEZEL L9VA S(EAL9VA01,R3A) GP 1

5 #N/A EBL9VA01013 FUNCTION BUTTON L9VA GP 1

6 #N/A EBW0VA02015 LENS W0VA GP 1

7 M-MS-0808-9244 FEL7V004015 BIRD LOGO-10MM L7VC 1

8 M-MS-0808-9243 FEL7V003019 LOGO FRONT-VSC-38MM L7VC 1

9 #N/A FCL7TA01018 SHIELDING MYLAR L7TAGP 1
10 #N/A FAL7TA08011 SHIELDING L9VA DUAL GP 1
11 #N/A FAL9VA01012 LCD BKT-L L9VA GP 1
12 #N/A FAL9VA02019 LCD BKT-R L9VA GP 1
13 #N/A FCL7B001018 POWER BOARD MYLAR L7B GP 1
14 #N/A FCM7T004014 AL FOIL M7T GP 3
15 M-SCW-0824-6802 MM30040IBJ9 SCREW M3.0*4.0-I(NI) GP 8
16 M-SCW-0824-0814 MM30060BBJ3 SCREW M3.0*6,B(NI) GP 6
17 M-MS-0808-8986 MBLI1004018 IO NUT LI1 GP 4
18 #N/A MS35080B456 SCREW F3.5*8-B(NI)(WASHER) 1
19 CB-00002525 DD0L9VLC015 CABLE MB-LCD(30P,140MM)L9V-5 GP 1
20 CB-00004173 DDL9VABU001 CABLE MB-BUTTON(10P/10P,280MM)L9VA GP 1
21 E-00004177 DN0TE200F00 SPEAK ASSY L9VA FG-TE200 1.5W*2 GP 1
22 #N/A FCL5M005011 AL FOIL(PANEL) L5M 2
23 M-MS-0808-9247 EBL70023013 WIRE MOUNTS L70L-E GP 1
24 #N/A GAL7TA01016 RUBBER FOOT L7TA 2
25 #N/A EAL9VA02027 LCD COVER L9VA B(EAL9VA02,R3A) GP 1
26 #N/A FBL9VA01013 HINGE-PLATE L9VA GP 1
27 M-MS-0808-9411 FBL70008014 LOCK METAL L70B GP 1
28 #N/A EAW0VA03029 STAND FRONT W0VA(EAW0VA03,R3A)BK GP 1
29 #N/A EAW0VA05021 STAND-BACK W0VA(EAW0VA05,R3A)BK GP 1
30 #N/A FAW0VA04017 HINGE ASSY W0VA GP 1
31 #N/A FBW0VA02015 CONTACT-PLATE W0VA GP 1
32 HW-00004157 MF40140IJ29 SCREW F4.0*14-I(BNI) GP 7
33 #N/A DDL9TATH107 CABLE STAND-HINGE(1P,150MM) GP 1
34 M-SCW-0824-6895 MF40080IBJ1 SCREW F4.0*8-I(NI) GP 1
35 #N/A EBL9VA02028 HINGE COVER L9VA B(EBL9VA02,R3A) GP 1
36 M-MS-0808-9815 GAL9V002014 RUBBER PLUG VESA L9V(GAL9V002,REV3A) 4
37 M-SCW-0824-6797 MF40080BJ29 SCREW F4.0*8-B(BNI)GP 2
38 #N/A MM40100BL61 SCREW M4*10.0-B(BNI,NYLOK) GP 6
39 #N/A EAW0VA04025 BASE W0VA(EAW0VA04,REV3A)BK GP 1
40 E-00004175 AA90ME13006 LCD(TFT)HSD 190ME13-A02(8MS) A GP 1
41 #N/A FBW0VA03011 BASE-PLATE W0VA GP 1
42 #N/A GAW0VA03011 RUBBER FOOT-C W0VA GP 2
43 #N/A GAW0VA01018 RUBBER FOOT W0VA GP 2
44 #N/A HCL9VA01014 ID LABEL L9VA GP 1
45 M-LB-0813-0745 HCL7V002011 SERIAL LABAL L7V GP 1
46 M-MS-0808-9682 JXL9V001010 LCD FILM L9V GP 1

ViewSonic Corporation Confidential

45

-

Do Not Copy VA912/b-4

Item

ViewSonic P/N

Ref. P/N

Description

Q'ty

PACKING PARTS LIST (VA912b-4)

Item

ViewSonic P/N

Ref. P/N

Description

Q'ty

Packing for Shipping

ViewSonic Corporation Confidential

46

-

Do Not Copy VA912/b-4

ViewSonic Model Number: VS10867-1W
Rev: 1a

Serial No. Prefix: PW8

1 #N/A 1L9VAZXVS92 VA912 monitor 1
2 #N/A HBL9VA010013 END CAP (L) 1
3 P-00004180 HBL9VA02010 END CAP (R) 1
4 #N/A HGL9VA010018 USER'S MANUAL & CD 1
5 A-00003642 DM33T181004 POWER CORD 3P 1.8M 1
6 #N/A HCL9VA02013 CARTON 1
7 M-LB-0813-1042 HCL7V019011 CARTON LABEL 1
8 M-MS-0808-9158 HAL7V002019 EPE BAG 1

9 CB-00002602 DDL7VDPC005 VGA CABLE 1
10 CB-00004149 DD0L0TPC007 AUDIO CABLE 1
11 C-00004147 38W0VABS010 Base assy 1

1 #N/A 1L9VAZXVS09 VA912 monitor 1
2 #N/A HBL9VA010013 END CAP (L) 1
3 P-00004180 HBL9VA02010 END CAP (R) 1
4 #N/A HGL9VA010018 USER'S MANUAL & CD 1
5 A-PC-0106-0224 DM333181G97 POWER CORD 3P 1.8M 1
6 #N/A HCL9VA01017 CARTON 1
7 M-LB-0813-1042 HCL7V019011 CARTON LABEL 1
8 P-00004159 HAL0T002019 PE BAG 1

9 CB-00002602 DDL7VDPC005 VGA CABLE 1
10 CB-00004149 DD0L0TPC007 AUDIO CABLE 1
11 C-00004165 38W0VABS001 Base assy 1

9. Block Diagram

+3.3V

+2.5V

POWER

AIC117ADJ

AIC117ADJ

+5V

+5V

TX0+ / TX0-

Backlight

TX1+ / TX1-

TX2+ / TX2-

19"

Panel

TX3+ / TX3-

Switch

AO3415

Clock + / Clock-

BRIGHTNESS

DDC

EEPROM

+3.3V +2.5V

24LC02

Triple ADC

Interface

Digital

HSYNC , VSYNC

AR AG AB

+12V

Panel

RTD2523

Volu

24.576MHz

Mute

Audio

TDA7496L

STBY

Interface

Clock

Gen.

RST

Host

Interface

IRQ

+5V

CSZ

CPU

MTV312V64

VBRI

Keypad

INV

ON/OFF

+12V

+5V

Power Board

And Backlight

Control

Inverter

AC IN

Crystal

DVI IN

VGA IN

11.0592MHZ

EEPROM

24LC16

ViewSonic Corporation Confidential

47

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Do Not Copy VA912/b-4

10. Schematic Diagrams

CN1 CONN 4x2-R

1

2

3

4

6

5

7

8

2

C102

12V

L3

1U/6

FUSE1
0

1

10K/6

1

2

C4

0.1u/6

3DVCC

MMST3906

C11

R8

0/6

Q3

0.1U/6

3DVCC

R10

10K/6

R14

10K/6/NC

R1,L1

C5

0.1u/6

R13 1K/6

3DVCC

VCC12

C6

220u/16V

VRMT

L32

FEB_0805

TO252 package

U1 AIC1117CY

3

VIN

+

EC2

10uF/16V

U2 AIC1117CY

2

VIN

VOUT

GND

1

VOUT

GND

1

5DVCC

3EC

C1

0.1u/6

EC1

330u/16V

5DVCC

12

3DVCC_1

10uF/16V

EC3

R175 0/6

0.1u/6

C3

共同

layout

2

4

VO

200/6 1%

R3

+

R6

330/6 1%

3

U1與U'

3DVCC

3DVCC

3AVCC1

3PVCC

3AVCC2

RTD 3DVCC

ADC_ 3AVCC
RTD 3PVCC

LVDS_3AVCC

DSUB_5V

D30

1N4148

3DVCC

D31

1N4148

4.7K/6

R143

R18 4.7K/6

C13
1U/8

Modify

Q18
MMBT3906

3

1

2

2

MMBT3906

R144

4.7K/6

3

1

3DVCC

3

Q19

1

R16
1K/6

Q4

SN7002E

2

NC/CX201209805/8
L27

CX201209805/8

L28

C100

0.1u/6

VCPU

VBRI

C101
NC/6

SOT223 package

D1

1N4148

DEL R173,R174; ADD D1

U3 AIC1117CY

3

VIN

+

10uF/16V

EC5

VOUT

GND

1

2.5DVCC_1

+

EC6

10uF/16V

R176 0/6

0.1u/6

C12

2

4

VO

R15

200/6 1%

R17

200/6 1%

2.5DVCC

2.5DVCC

RTD 2.5DVCC

ViewSonic Corporation Confidential

48

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Do Not Copy VA912/b-4

3

34

2

2

1

1

9

9

8

1

34
2

5

1

678

9

8

9

7

6

3

34

2

2

1

1

9

9

8

1

4

5

5

678

7

6

1

4

5

5

678

7

6

3

34

2

2

1

1

9

9

8

1

4

3

5

2

5

1

678

7

6

For layout

4

5

ViewSonic Corporation

Model

POWER

Title
Date Rev:

DDC_SDA
IN-H
IN-V
DDC_SCL

VGA/NC

CN2

PAGE1 VGA
INPUT

DDC_SDA

16

11

12

13

14

15

1

6

2

7

3

8

4

9

5

10

17

RED+IN
RED-IN
GREEN+IN
GREEN-IN
BLUE+IN
BLUE-IN

DSUB_5V

PIN 10 VGA_CON

DSUB_5V

DDC_SCL

L8 FCB1608C-190T03/6

RED+IN

RED-IN

L9 FCB1608C-190T03/6

GREEN+IN

GREEN-IN

R24

75/6/F

R27

75/6/F

C17
10pF

C20
10pF

R23 100/6

R25 100/6

R26 100/6

R28 100/6

R29 100/6

C16 0.047u/6

C18 0.047u/6

C19 0.047u/6

C21 0.047u/6

C22 0.047u/6

R30
1M/6

RED+

RED-

GREEN+

GREEN-

SOGIN

DAN217K

RED+IN

IN-H

GND

IN-H
DDC_SCL

D7

3

RED-IN
GREEN-IN
BLUE-IN

ADC_VCC

2

1

2

D10

1

GREEN+IN

IN-V

Z5.6

25

26

DVI-D/NC

11

13

DAN217K

CN4

RX2-

RX2+

GND
RX4-

RX4+

RX1-

RX1+

GND
RX3-

RX3+

GND

RX0-

RX0+

GND
RX5-

RX5+

GND

RXC+

RXC-

CN3

1

+

+

3

+

+

5

+

+

7

+

+

9

+

+

+

+

+

+

NC/VGA INPUT

D8

3

1

2

3

4

5

6

SCL

7

SDA

8

VS

9

10

11

12

13

14

5V

15

16

HP

17

18

19

20

21

22

23

24

2

1

2

4

6

8

10

12

14

2

1

D11

DDC_SDA

Z5.6

RED+IN
GREEN+IN
BLUE+IN
GND
IN-V
DDC_SDA
DSUB_5V

DAN217K

BLUE+IN

R48 10K/6

C31
1U/6NC

2

1

D9

3

D12

Z5.6

DDC2_SCL
DDC2_SDA

2

1

2

1

DDC_SCL

D24

Z5.6

2

D13

Z5.6

1

Bus_Power

C30

0.1U/6

L10 FCB1608C-190T03

BLUE+IN

BLUE-IN

R32

75/6/F

IN-H

C24

10pF

L31 FCM1608C-300T06/6

IN-V

R37
2K/6

R155 0

R156 0

R157 0

R158 0

R159 0

R160 0

R161 0

R162 0

D18

D20

D25

Z5.6

Z5.6

Z5.6

2

D19

Z5.6

1

2

D21

Z5.6

1

2

D26

Z5.6

1

2

D27

1

Z5.6

2

D28

Z5.6

1

2

1

2

1

2

1

R31 100/6

R33 100/6

R34 100/6

R35
2K/6

R36 100/6

TX2­TX2+

TX1­TX1+

TX0­TX0+

TXC+
TXC-

C26
22P/6

VGAVS

C28
22P/6

C23 0.047u/6

C25 0.047u/6

VGAHS

BLUE+

BLUE-

2

D34

Z3.3V

1

2

D35

Z3.3V

1

AHS

AVS

C29 0.1U/6

U5

1

NC

2

NC

3

NC

4

VSS SDA

M24LC02

Bus_Power

VCC

VCLK

SCK

3DVCC

D17
BAT54C-GS08

R44

8

7

6

5

2K/6

2

D22

Z5.6/NC

1

R45
2K/6

R46 100/6

R47 100/6

2

D23

Z5.6/NC

1

3DVCC

DDC2_SCL
DDC2_SDA

ViewSonic Corporation

Model

VGA AND DVI INPUT

Title

ViewSonic Corporation Confidential

49

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Do Not Copy VA912/b-4

Date Rev:

3DVCC

3DVCC

L12

FEB_0805

C34

10uF/16V

C35

0.1u/6

C36

0.1u/6

C37

0.1u/6

C38

0.1u/6

C39

0.1u/6

C40

0.1u/6

C41

0.1u/6

C42

0.1u/6

C43

0.1u/6

C44

0.1u/6

C45

0.1u/6

C46

10uF/16V

L13 FEB_0805

R2.5DVCCR3DVCC

2.5DVCC

C47

0.1u/6

2.5DVCC

TMDS_AVCC

R57
NC

R58

4.7K/6

3AVCC1

3PVCC

3AVCC2

3PVCC

R54

4.7K/6

R55

4.7K/6/NC

3AVCC2 TMDS_AVCC

L15 FEB_0805

C54

C60

0.1u/6

0.1u/6

22uF/16V

L19 FEB_0805

C33 22pF/6

C48 22pF/6

L14 FEB_0805

C50

0.1u/6

10uF/16V

C49

PLL_GND

+

C53

ADC_VCC3AVCC1

+

C59

22uF/16V

ADC_GND

C43.C44.C45

XO

R53
NC

C61

Y1

24.576MHz

XI

+

0.1u/6

C51

0.1u/6

C52

R56 1K/6 R68

TX2+
TX2­TX1+
TX1­TX0+
TX0­TXC+
TXC-

RX2P
RX2N
RX1P
RX1N
RX0P
RX0N
RXCP
RXCN

Near to Chip

C55

0.1u/6

0.1u/6

BLUE+
BLUE-

SOGIN
GREEN+
GREEN-

RED+

RED-

0.1u/6

C62

盡量靠近

C56

0.1u/6

C63

0.1u/6

C57

C64 0.1u/6

0.1u/6

IC

AHS
AVS

0.1u/6

C58

B+
B­SOG
G+
G­R+
R-

AHS
AVS

RTD_SCLK

RTD_SDO/SDI

RTD_SCSB

DDC_SDA

DDC_SCL

XO
XI

SDIO1
SDIO2
SDIO3

RESET

U6

1

XO

2

XI

4

DPLL_VDD

5

APLL_VDD

3

DPLL_GND

8

APLL_GND

6

PLL_TEST1

7

PLL_TEST2

9

TMDS_TST/PWM1

12

EXT_RES

14

RX2P

15

RX2N

17

RX1P

18

RX1N

20

RX0P

21

RX0N

23

RXCP

24

RXCN

11

TMDS_VDD

13

TMDS_VDD

19

TMDS_VDD

26

TMDS_VDD
TMDS_GND

10

16

TMDS_GND

22

TMDS_GND

25

TMDS_GND
B+

30

B-

31

SOG/ADC_TEST

33

34

G+
G-

35

R+

37

R-

38

ADC_VDD

29

36

ADC_VDD
ADC_VDD

41

ADC_REFIO

28

ADC_GND

27

ADC_GND

32

ADC_GND

39

ADC_GND

40

AHS

42

AVS

43

R66 100/6

120

3.3V Ground

96

109

3.3V Ground

SCLK

50

3.3V Ground

SDIO[0]

54

84

53

3.3V Ground

TCON[4]/SDIO[1]

72

3.3V Ground

TCON[3]/SDIO2]

52

57

51

NCR71

48

3.3V Ground

TCON[2]/SDIO[3]/PWM2

3.3V Ground

SCSB

RESET#

56

111

NCR72

110

95

83

121

3.3V Power

3.3V Power

3.3V Power

3.3V Power

RTD2523

DDCSDA

47

58

71

3.3V Power

3.3V Power

DDCSDA2

DDCSCL

46

125

49

3.3V Power

DDCSCL2

126

127

2.5V Power

98

45

69

2.5V Power

2.5V Power

TCON[11]/V[0]

TCON[10]/V[1]

115

114

2.5V Power

TCON[9]/V[2]

TCON[8]/V[3]

117

116

70

44

97

128

TCON[12]/COUT/PWM2
TCON[13]/COUT/PWM2

2.5V Ground

2.5V Ground

2.5V Ground

2.5V Ground

TCON[0]/VCLK

TCON[1]/V[7]

TCON[7]/V[4]

TCON[6]/V[5]

TCON[5]/V[6]

122

119

118

123

124

PWM0/REFCLK

AR1N
AR1P/TCON[0]
AR2N/TCON[1]
AR2P/TCON[5]
AR3N/TCON[6]
AR3P/TCON[7]

AG1N/TCON[8]

AG1P/TCON[9]

AG2N/TCON[10]
AG2P/TCON[11]

BG3N

BG3P

BCLKN
BCLKP

BB1N

BB1P

BB2N

BB2P

BB3N

BB3P

AG3N/TEAN

AG3P/TEAP
ACLKN/TEBN
ACLKP/TEBP

AB1N/TECN

AB1P/TECP

AB2N/TECLKN
AB2P/TECLKP

AB3N/TEDN

AB3P/TEDP

BR1N/TOAN

BR1P/TOAP

BR2N/TOBN

BR2P/TOBP

BR3N/TOCN

BR3P/TOCP

BG1N/TOCLKN
BG1P/TOCLKP

BG2N/TODN
BG2P/TODP

55

107

106

105

104

103

102

101

100

99

68

67

66

65

64

63

62

61

60

59

94

93

92

91

90

89

88

77

76

75

74

73

113

112

87

86

85

82

81

80

79

78

108

RXEIN0­RXEIN0+
RXEIN1­RXEIN1+
RXEIN2-

RXEIN2+
RXECKIN­RXECKIN+

RXEIN3-

RXEIN3+

RXOIN0-

RXOIN0+

RXOIN1-

RXOIN1+

RXOIN2-

RXOIN2+
RXOCKIN­RXOCKIN+

RXOIN3-

RXOIN3+

VBRI
VOLUME

5DVCC

5DVCC

L22

FEB_1206

DGND

VCC12

L21

NC

R67

82K/6

R70

82K/6

3

1

GND

PANEL_5_12VCC

Q9

DTC144EUA

2

RXEIN0­RXEIN2-

DGND
RXECKIN­RXEIN3­RXOIN0­DGND
RXOIN1­RXOIN2­RXOCKIN­RXOIN3-

0/6R177

Q8 SI2301DS

1

C67
2200P/6

1

3

5

7

9

11

13

15

17

19

21

23

25

27

29

2

PANEL_PW12

CN5

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

1841 30P

3

C68

2200P/6

RXEIN0+

2

RXEIN1+RXEIN1-

4

RXEIN2+

6

DGND

8

RXECKIN+

10

RXEIN3+

12

RXOIN0+

14

DGND

16

RXOIN1+

18

RXOIN2+

20

RXOCKIN+

22

RXOIN3+

24

26

PANEL_5_12VCC

28

PANEL_5_12VCC

30

G

0/6R178

PANEL_5_12VCC

10K/6

D

3

DGND

C69

0.1U/6

S12

PANEL_5_12VCC

C70
100U/16V

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Do Not Copy VA912/b-4

ViewSonic Corporation

Model

Title
Date Rev:

RTD2523

3AVCC1

RESET

NC/ 1N4148

3AVCC1

D32

R147

4.7K/6

R165

NC/100K/6

C103

NC/1U/16V

2

2N3906

Q13

3DVCC

1

3

1

Q12

2N3906

2

3

VCPU

1

Q20

2

3

R166
0/6

NC/2N3906

2

Reset circuit

1

D33

NC/DAN202U

3

VCPU

C86

NC/1U/16V

R106
NC/82K/6

R78

10K/6

LED_G

LED_R

C84

+

22uF/16V

3DVCC

R79

10K/6

R82 4.7K/6

R93 4.7K/6

VCPU

C85

0.1u/6

C

B

3DVCC

MENU
SEL
PWR
DOWN
UP
RIGHT
LEFT

Junction from
A change to B

VCPU

E

33K/6

33K/6

R87

R88

0.1U/6

0.1U/6

C76

C77

33K/6

33K/6

R90

R89

0.1U/6

0.1U/6

C78

C79

33K/6

33K/6

R91

0.1U/6

C80

33K/6

R84

R85

0.1U/6

0.1U/6

C82

C81

less R94 to CN6 pin 11

R95 1K/6

R96 1K/6

R97 1K/6

R98 1K/6
R99 1K/6

R100 1K/6

R101 1K/6

R102 220/6

R103 220/6

R101,R103 net swap

CN6

10
9
8
7
6
5
4
3
2
1

4501-10-10P-R

TO BUTTON BOARD

90° E&T
4607-11Pin

VCPU

1

2

C75

0.1U/6

4.7K/6

R170

U8

1

A0

2

A1

3

A2

4

VSS SI

24LC16

PARAMETER
EEPROM

R171

4.7K/6

VCC

WP

SCK

R172

4.7K/6

8

7

6

5

VCPU

R180

NC

KEY1

KEY2

KEY3

R80

2K/6

R81

2K/6

R83 100/6

R92 100/6

PANEL_PW12

R179

2K/6

WP_EE

MUTE

STBY

C87 10pF/6

C88 10pF/6

VCPU

R142 NC

IICSCL

IICSDA

LED_R

LED_G

KEY1

KEY2
KEY3

Y2

11.0592MHz

PWR_SEL

R41

6.8K/6

R38

2K/6

VCC12

I1

12

X1

11

X2

7

RESET

19

INT0/P3.2

14

ISCL/P3.5/T1

13

ISDA/P3.4/T0

27

P6.0/AD0

26

P6.1/AD1

16

P6.2

9

P6.3

30

P6.4

31

P6.5

32

P6.6

33

P6.7

MTV312M64

6

NC

5

4

NC

VDD3

44

43

8

VCCVSS

VSYNC

HSYNC

DA8/HLFHO

DA9/HALFV

P3.1/TXD

P3.0/RXD

10

P5.0
P5.1
P5.2
P5.3
P5.4
P5.5
P5.6

P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
DA7
P4.0
P4.1
P4.2

R163

4.7K/6

R164 22

3

2

1

42

41

40

34

39

38

17

18

20

21

22

23

24

25

35

36

37

15

28

29

KEY1
KEY2
KEY3

R181 22

2
1

R39 4.7K/6

R40 4.7K/6

4
3

R124 100/6

R125 100/6

JP3

56

MENU
SEL
PWR
UP
DOWN
RIGHT
LEFT

WP_EE

VCPU

AVS

VRMT

R109 4.7K/6

R108 4.7K/6

R110

4.7K/6

VCPU

R111

4.7K/6

TxD
RxD

R112
NC

R113
NC

VCPU

R114

4.7K/6

DDC_SDA
DDC_SCL

R115

4.7K/6

5DVCC

SDIO1
SDIO2
SDIO3

RTD_SCLK
RTD_SCSB

JP1

1
2
3
4

HEADER 4

2004/12/28

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Do Not Copy VA912/b-4

2004/12/28

ViewSonic Corporation

Model

Title
Date Rev:

MCU & BUTTON

VCC12

R128
1K/6

PC AUDIO-IN

J3

ZD005D100

1

5

4

3

2

Z0412

AGND

L_LINE

R_LINE

VOLUME

L25 600/CX601T02001

1

1

L26 600/CX601T02001

220P/6

220P/6

C96

C95

2

2

3BC

R133 100/6

Z0416

VCC12

2

12

E

R132 100/6

MUTE

R140 10K/6

MUTE

3

1

R135
20K/6

AGND

R141 10K/6

R129 10K/6

SN7002E

Q15

LIN_PCZ0415

RIN_PC

20K/6

R136

2

R130 10K/6

1U/8

C89

AGND

C92 0.47U/8

C94 0.47U/8

VCC12

R138
10K/6

R139 10K/6

3

Q16

0.1U/8

DTC144EUA

1

AGND AGND

C98

C99

330U/16V

R131 3.9K/6

VCC12

VOL

L24

4

9

11

12

10

TDA7496L

BEAD/1206

U9

INL

INR VAROUT_L

STBY

SVR

GND

1

AGND

GND

2

15

VS

GND

3

16

VS

OUTL

VOLUME

VAROUR_R

OUTRMUTE

GND

GND

GND

18

20

19

13

GND

C90

0.1U/6

AGND

17

5

6

7

14

L23 BEAD/1206

C93

C97

VOL

C91

330U/16V

330U/16V

330U/16V

SPKOUTL

SPKOUTR

R134 CX201209805/8

R137 CX201209805/8

AGND

JP2

1
2
3
4

4606-04-04P-R

SPEAKER OUT

STBY

STBY

2

ViewSonic Corporation Confidential

52

3

Q17

DTC144EUA

1

AGND

-

Do Not Copy VA912/b-4

ViewSonic Corporation

Model

Title
Date Rev:

AUDIO

11. PCB Layout Diagrams

MB TOP

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Do Not Copy VA912/b-4

*Readers Response*

Dear Readers:

Thank you in advance for your feedback on our Service Manual, which allows continuous improvement

of our products. We would appreciate your completion of the Assessment Matrix below, for return to

ViewSonic Corporation.

A. What do you think about the content of this Service Manual?

Assessment

1.

Precautions and Safety Notices

2. Specification

Front Panel Function Control Description

3.

4. Circuit Description

5.

Adjustment Procedure

6. Troubleshooting Flow Chart

7. Recommended Spare Parts List

8. Exploded Diagram and Exploded Parts List

9. Block Diagram

10. Schematic Diagrams

11. PCB Layout Diagrams

tinU riaF daB

dooGtnellecxE

B. Are you satisfied with this Service Manual?

metI tnellecxE dooG riaF daB

.1

Service Manual Content

.2

Service Manual Layout

.3

The form and listing

C. Do you have any other opinions or suggestions regarding this service manual?

Readers basic data:

Name: Title:

Company:
Add.:

Tel:
E-mail:

After completing this form, please return it to ViewSonic Quality Assurance

1-909-839-7943.
([e-mail])

You may also e-mail any suggestions to the Director, Quality Systems & Processes

Fax:

in the USA at facsimile

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Do Not Copy VA912/b-4