Viewsonic VA703B-4, VA703M-1, VA703M- 2, VA703M- 3, VA703M -4 Service Manual

Service Manual

ViewSonic VA703b-4

VA703m-4

Model No. VS11366

17” Color TFT LCD Display

(VA703b-4_VA703m-4_SM Rev. 1b Oct. 2006)

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

Copyright

Copyright © 2006 by ViewSonic Corporation. All rights reserved. No part of this publication
may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any
language or computer language, in any form or by any means, electronic, mechanical, magnetic,
optical, chemical, manual or otherwise, without the prior written permission of ViewSonic
Corporation.

Disclaimer

ViewSonic makes no representations or warranties, either expressed or implied, with respect to
the contents hereof and specifically disclaims any warranty of merchantability or fitness for any
particular purpose. Further, ViewSonic reserves the right to revise this publication and to make
changes from time to time in the contents hereof without obligation of ViewSonic to notify any
person of such revision or changes.

Trademarks

Optiquest is a registered trademark of ViewSonic Corporation.
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.

Revision History

Revision SM Editing Date ECR Number Description of Changes Editor

1a 7/24/2006 Initial Release J. Chang

1b 10/04/2006 Add COM / SVA panel source J. Chang

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TABLE OF CONTENTS

1. Precautions and Safety Notices 1

2. Specification 4

3. Front Panel Function Control Description 14

4. Circuit Description 18

5. Adjustment Procedure 25

6. Troubleshooting Flow Chart 48

7. Recommended Spare Parts List 56

8. Exploded Diagram and Exploded Parts List 65

9. Block Diagram 71

10. Schematic Diagrams 72

11. PCB Layout Diagrams 78

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1. Precautions and Safety Notices

1. Please carefully read this manual before operating the device and keep it available for future reference.

2. To avoid the danger of the monitor falling and thereby possibly causing injury and/or serious damage to the
monitor itself, do not place it on unstable cars or desks. Be careful to avoid placing any stress on the LCD screen
during handling.

3. Do not place this monitor in areas that are wet or where water or other liquids may come in contact with it, such
as bathrooms, kitchens, wet floors, near washing machines or by swimming pools.

4. Remove the power plug from the electrical socket before cleaning. No water-containing cleaning agent should be
used to clean the screen, but only cleaning agents formulated specifically for cleaning LCD screens. Do not put
any liquid cleaning agent directly on the screen, but put it on a soft cloth first and then gently apply the cloth to
the screen.

5. In order to guarantee reliable operation and adequate heat dissipation, do not cover or block vent holes on the
monitor. Do not put the monitor close to heat sources. Do not place the monitor on furniture such as a bookshelf,
unless sufficient ventilation is available.

6. A 3-pin grounding plug is provided for this monitor. In order to guarantee normal operation and safety of this unit,
this plug should be used with a matching grounded power socket.

7. Please follow all warnings and instructions that accompany the monitor.

8. Please pay special attention to power supply overloads, as electrical shock or fire may occur.

9. Do not place anything on the power cord. Do not hang the power cord over an area where people or objects may
pass.

10. In case the monitor is not be used for an extended period, turn off power to avoid the possibility of short circuits
caused by lightning.

11. In order to avoid electrical shock or fire risks, do not insert any object through any openings in the monitor’s
enclosure. Do not allow any liquid to come in contact with the monitor.

12. In case of any abnormal noise or odor caused by incorrect operation, turn off power immediately and contact a
professional technician. Do not attempt to repair this monitor by yourself, as electrical shock may occur when
opening the back cover or accessing internal components.

13. If any of the following conditions occurs, turn off power and contact a repair service provider:

1) the power cord is damaged or worn;

2) liquid has gotten into the monitor, or the monitor has experienced immersion or wetting;

3) the monitor has fallen;

4) the monitor’s performance shows obvious changes;

5) the monitor fails to work normally when correct procedures are followed. In that case, please make any

adjustments in accordance with instructions supplied with the monitor; do not attempt any changes to
established procedures, as further damage may occur, making successful repair of the monitor more difficult.

14. In case parts need to be replaced, you must use identical parts or those supplied by our certified manufacturers.

Any other parts used without our authorization may result in electrical shock or fire risk.

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Handing and Placing methods

Correct methods Incorrect methods

Only touch the metal frame of the LCD panel or
the front cover of the monitor, DO not touch the
surface of the POL

Surface of the LCD panel is pressed by fingers and
that may cause”mura”

Take out the monitor with cushions Taking out the monitor by grasping the LCD panel,

that May cause”mura”

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Place the monitor on a clean and soft foam pad

Placing the monitor on a foreign objects, that could scratch
The surface of the "Panel" or cause "mura"

The panel is placed facedown the lap,that may cause "mura"

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2. Specification

/ 10.5 lb

2),

R /

INTRODUCTION

FEATURES VA703b-4 / VA703m-4

Size 17 “
Luminance (Typ) 280 cd/㎡

1st TFT LCD panel
INNOLUX MT170EN01
V7

nd

2

TFT LCD panel

SVA 170SX01TB

rd

3

TFT LCD panel

CMO M170E5-L09

Input Signal

Sync Compatibility

Compatibility

Power Voltage AC 100-240V, 50/60Hz Yes
Power Consumption

Ergonomics

Contrast Ratio (Typ) 600 :1
Colors 16.2 M colors (6+2bit panel)
Response Time (Typ) 8 ms
Viewing Angle (H/V) 150 ° / 135°
Recommend resolution 1280 x 1024 @60Hz
Size 17 “
Luminance (Typ) 300 cd/㎡

Contrast Ratio (Typ) 600 :1
Colors 16.2 M colors (6+2bit panel)
Response Time (Typ) 8 ms
Viewing Angle (H/V) 130 ° / 110°
Recommend resolution 1280 x 1024 @60Hz
Size 17 “
Luminance (Typ) 300 cd/㎡

Contrast Ratio (Typ) 500 :1
Colors 16.2 M colors (6+2bit panel)
Response Time (Typ) 8 ms
Viewing Angle (H/V) 150 ° / 130°
Recommend resolution 1280 x 1024 @60Hz
Analog (75ohms, 0.7/1.0 Vp-p) Yes
Digital (DVI-D) No
Separate Sync Yes
Composite Sync No
Sync on Green No
PC Yes
Power Mac Yes
TV Box (NextVision 6) Yes

On Mode(Max / Typ) Under 36 W in max
Active Off Mode (Max)
Tilt ( -5 ° ~ +20 °)

Swivel No
Pivot No
Height Adjust No

Saving mode< 2W

Off mode <1 W

Yes

OSD Control [ 1 ] [ 2 ] [ ][?] [?] Yes
Dimension

Weight
Operating Condition
Storage Condition

Regulation

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Physical (W x H x D) 379x400x210 mm
Package (W x H x D)
Physical (Net Weight)
Package (Gross Weight)

3.6Kg/ 7.9 lb

4.8Kg

440x485x147 mm

Temperature ( / )℉ ℃ 32℉~104℉ / 0℃~40℃

Humidity (%) 20 % - 90 %
Temperature ( / )℉ ℃ -4℉~140℉ / -20℃~60℃
Humidity (%) 5 % - 90 %

UL/CUL, FCC-B, CB, CE, TUV/GS, TUV/ERGO (cover ISO13406­TCO03, BSMI, CCC, PSB, C-TICK, ENERGY STAR, SASO, GOST-

HYGIENIC, Argentina IRAM, WEEE, ROHS.

PRODUCT DEFINITION AND SPECIFICATION

Sync Compatibility

Separate

1

W @ <

15

% distortion

(

for VA703m

-

4 only

)

Adapter

No

2001

Product Name VA703b-4 / VA703m-4
Model Number VS11366

M model for America
E model for Europe
G model for China

Region

P model for Asia
A model for Australia
S model for Singapore
K model for Korea
U model for UK
English, French, German, Italian, Spanish,

OSD Languages

Finnish, Japanese, Traditional Chinese,

Simplified Chinese
TFT LCD Panel and Model #
TFT LCD Panel and Model #
TFT LCD Panel and Model #

1st TFT LCD panel INNOLUX MT170EN01

2nd TFT LCD panel SVA 170SX01TB

3rd TFT LCD panel CMO M170E5-L09

Scalar Realtek, Model # : RTD2023L
Input Signal Analog

Audio

Power Cable Refer to Appendix D

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

2001 and Hot Plug Detect &DDC

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

ViewSonic CD Wizard

Yes ( for VA703m-4 only)

Arabic, English, Finnish, Spanish, German,

Yes

Italian, Swedish, Polish, Korean, Portuguese,
ViewSonic Quick Start Guide

Screen Protector Mylar
Hi Pot label

Russian, French, Simplified Chinese,

Traditional Chinese, Hungary, Czech, Turkish

Yes
Yes

QA pass label For G model only
Hg Warnning label

Yes
Warranty Sticker For G model only
Warranty Card For G model only
Carton Sticker For G model only
PE bag of Carton

For G model only

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2-1 GENERAL specification

Test Resolution & Frequency 1280 x 1024 @ 60Hz
Test Image Size Full Size

Contrast and Brightness Controls

2-1 VIDEO INTERFACE
Analog Input Connector DB-15 (Analog), refer the appendix A
Default Input Connector Defaults to the first detected input
Video Cable Strain Relief Equal to twice the weight of the monitor for five minutes
Video Cable Connector DB-15 Pin out Compliant DDC 2B
Video Signals 1. Video RGB (Analog), 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

Video Compatibility

Factory Default:
Contrast = 70%, Brightness = 100%

Shall be compatible with all PC type computers, Macintosh
computers, and after market video cards

Resolution Compatibility

Exclusions Not compatible with interlaced video

640 x 350, 640 x 480, 720 x 400 (640 x 400), 800 x 600,
832 x 624, 1024 x 768, 1152 x 864, 1280 x 1024

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2-3 POWER SUPPLY

Internal Power Supply Part Number:PI-SB03/XXXXXXX
Input Voltage Range
Input Frequency Range
Short Circuit Protection
Over Current Protection
Leakage Current
Efficiency
Fuse
Power Dissipation
Max Input AC Current
Inrush Current (Cold Start)

100 to 240VAC
50 to 60 Hertz

OUTPUT CAN BE SHORTED WITHOUT DAMAGE

6 A TYPICAL AT 5 VDC

1.0 MA (MAX) AT 264VAC / 60HZ
80 % TYPICAL AT 115VAC FULL LOAD

INTERNAL AND NOT USER REPLACEABLE

32 WATTS (TYP)

1.2 ARMS @ 90VAC, 0.8 ARMS @180V AC
30 A @ 90 VAC, 60 A(MAX) @ 264 VAC

SHALL START AND F UNCTION PROPERLY WHEN

Power Supply Cold Start

UNDER FULL LOAD, WITH ALL COMBINATIONS OF
INPUT VOLTAGE, INPUT FREQUENCY, AND
OPERATING TEMPERA TURE
SHALL BE ABLE TO WITHST AND AN ANSI/IEEE

Power Supply Transient Immunity

C62.41-1980 6000V 200 AMPERE RING WAVE
TRANSIENT TEST WITH NO DAMAGE

Shall be able to withstand 1.5 times nominal line voltage

Power Supply Line Surge Immunity

for one cycle with no damage
Shall be able to function properly, without reset or visible

Power Supply Missing Cycle Immunity

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 define to

Power Supply Acoustics

be in compliance with ISO 7779 (DIN EN27779:1991)
Noise measurements of machines acoustics. Power Switch
noise shall not be considered

US Type Power Cable

Length = 1.8m. Connects to AC/DC Power Color = Black

Power Saving Operation(Method) VESA DPMS Signaling

On Mode <36 W (max)

Power Consumption

Saving Mode< 2W Off Mode <1 W

Recovery Time On Mode = N/A, Active Off < 3 sec

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2-4 ELECTRICAL REQUIREMENT

Horizontal / Vertical Frequency

Horizontal Frequency
Vertical Refresh Rate

30 – 82 kHz
50 – 85 Hz.

Maximum Pixel Clock
Sync Polarity Independent of sync polarity.

135 MHz

Timing Table

Item Timing Analog

1 640 x 350 @ 70Hz, 31.5kHz
2 640 x 480 @ 50Hz, 24.68KHZ
3 640 x 480 @ 60Hz, 31.5kHz
4 MAC 640 x 480 @ 67Hz, 35.0kHz
5 640 x 480 @ 72Hz, 37.9kHz
6 640 x 480 @ 75Hz, 37.5kHz
7 640 x 480 @ 85Hz, 43.27kHz
8 720 x 400 @ 70Hz, 31.5kHz

9 800 x 600 @ 56Hz, 35.1kHz
10 800 x 600 @ 60Hz, 37.9kHz
11 800 x 600 @ 72Hz, 48.1kHz

Ye s

Ye s

Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s

12 800 x 600 @ 75Hz, 46.9kHz
13 800 x 600 @ 85Hz, 53.7kHz
14 MAC 832 x 624 @ 75Hz, 49.7kHz
15 1024 x 768 @ 60Hz, 48.4kHz
16 1024 x 768 @ 70Hz, 56.5kHz
17 1024 x 768 @ 72Hz, 58.1kHz
18 1024 x 768 @ 75Hz, 60.0kHz
19 1024 x 768 @ 85Hz, 68.67KHZ
20 1152 x 864 @ 75Hz, 67.5KHZ
21 MAC 1152x870@75HZ, 68 .68K H Z
22 1280 x 960 @ 60Hz, 44.93KHZ
23 1280 x 960 @75Hz, 56.25KHZ
24 1280 x 1024 @ 60Hz, 63.98KHZ
25 1280 x 1024 @ 75Hz, 79.97KHZ

*1. Tolerance ≧ ± 2kHz.
*2. Any timing not in the list, it should display as normal or show on “OUT OF RANGE” OSD message without blanking.

Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s
Ye s

*3. The image quality of 85Hz mode might be worse than 75Hz.

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Primary Presets

1280 x 1024 @ 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 Image
Adjust” time

● Under DOS mode (640 x 350, 720 x 400 & 640 x 400), it should recall factory setting when
execute “Auto Adjust”

● The monitor needs to do “Auto Image Adjust” the first time a new mode is detected
(See section “0-Touch™ Function Actions”)

● The monitor needs to do “Auto Adjust” the first time a new mode is detected
(See section “0-Touch™ Function Actions”)

2-5 AUDIO INTERFACE (SPEAKER SPECIFICATION) ( for VA703m-4 only)

Line input connection

3.5 mm stereo jack

Line input signal 1.0Vrms
Line input impedance >10 kOhm
Maximum power output (Electric)

1 W @ < 15% DISTORTION

Signal to Noise Ratio 50 dB
Frequency response 200 Hz – 20 Khz

Distortion

<15 % THD (@1kHz)
There should be no audible vibration with volume at

Vibration

100%. (Input signal within 1.0 Vrms)
There should be no affect on the screen image stability

Screen image

under any conditions

Connector PC99 requirement Audio in

Lime Green pantone # 577C

Cable type / length 3.5mm stereo cable / 1.8m length

NOTE: THERE IS NO GUARANTEE <1 W POWER

Audio DPMS

CONSUMPTION IN ACTIVE OFF MODE, WHEN THE
AUDIO CABLE IS CONNECTED

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2-6 TFT LCD PANEL

st

Panel Source

1

Type TN, LVDS
Active Size 337.9mm (H) x 270.3mm (V)
Pixel Arrangement RGB Vertical Stripe
Pixel Pitch 0.264 mm
Glass Treatment Anti Glare (Hard coating 3H)
# of Backlights 4 CCFL edge-light
Backlight Life 50,000 Hours (Typ)
Luminance –Condition: CT = 6500 K
Contrast = Max, Brightness = Max
Brightness Uniformity 75 % (Min)
Contrast Ratio 600 :1 (Typ), 500 :1 (Min)
Color Depth Vertical) 16.2 million colors (6+2 bit panel)

Viewing Angle (Horizontal)

Viewing Angle (Vertical)
Response Time

10%-90% @ Ta=25°C
Panel Defects Please see Panel Quality Specifications.

INNOLUX MT170EN01 V.7

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

150 deg (Typ)@ CR>10
170 deg (Typ)@ CR>5
130 deg (Typ) @ CR>10
155deg (Typ)@ CR>5
8 ms (Tr= 2 ms, Tf = 6 ms) (Typ)
16ms (Tr= 4 ms, Tf = 12 ms) (max)

nd

Panel Source

2

SVA 170SX01 TB
Type TN, LVDS
Active Size 337.9mm (H) x 270.3mm (V)
Pixel Arrangement RGB Vertical Stripe
Pixel Pitch 0.264 mm
Glass Treatment Anti Glare (Hard coating 3H)
# of Backlights 4 CCFL edge-light
Backlight Life 50,000 Hours (Typ)
Luminance –Condition: CT = 6500 K
Contrast = Max, Brightness = Max

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

240 cd/m2 (Min after 30 minute warm up)
Brightness Uniformity 1.3 (Min)

Contrast Ratio 600 :1 (Typ), 400 :1 (Min)
Color Depth Vertical) 16.2 million colors (6+2 bit panel)
Viewing Angle (Horizontal) 130 deg (Typ)@ CR>10
Viewing Angle (Vertical) 110 deg (Typ) @ CR>10
Response Time
10%-90% @ Ta=25°C

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

20ms (Tr= 6 ms, Tf = 14 ms) (max)

Panel Defects Please see Panel Quality Specifications.

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Lv (Max) = The Luminance requirement of

rd

Panel Source

3

CMO M170E5-L09
Type TN, LVDS
Active Size 337.9mm (H) x 270.3mm (V)
Pixel Arrangement RGB Vertical Stripe
Pixel Pitch 0.264 mm
Glass Treatment Anti Glare (Hard coating 3H)
# of Backlights 4 CCFL edge-light
Backlight Life 50,000 Hours (Typ) @ 6.5mA
Luminance –Condition: CT = 6500 K
Contrast = Max, Brightness = Max

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

230 cd/m2 (Min after 30 minute warm up)
Brightness Uniformity 1.7 (Max)
Contrast Ratio 500 :1 (Typ), 400 :1 (Min)
Color Depth Vertical) 16.2 million colors (6+2 bit panel)
Viewing Angle (Horizontal) 150 deg (Typ)@ CR>10
Viewing Angle (Vertical) 130 deg (Typ) @ CR>10
Response Time
10%-90% @ Ta=25°C

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

18 ms (Tr=7 ms, Tf = 11 ms) (max)

Panel Defects Please see Panel Quality Specifications.

2-7 IMAGE PERFORMANCE

Display Size

Horizontal Display Size, Primary Preset Full Screen
Vertical Display Size, Primary Preset Full Screen

Luminance

(Max) –Condition:

Lv

Brightness / Contrast = 100%
CCT = USER COLOR (R/G/B=100%)

section 4-6 “TFT LCD PANEL”

Lv (Def) –Condition:

Brightness / Contrast = default
Color Temperature = 6500K

Lv (6500K) / Lv (Max) x 100% > 85%

Lv (sRGB/6500K) –Condition:

Brightness / Contrast = Default
CCT =sRGB

Lv (sRGB) / Lv (Max) x 100% > 85%

Lv (9300K) –Condition:

Brightness / Contrast = Default
CCT = 9300K

Lv (9300K) / Lv (Max) x 100% > 70%

Lv (5400K) –Condition:

Brightness / Contrast = Default
CCT = 5400K

Lv (Brightness) –Condition:

Contrast = 100%

Lv (Contrast) –Condition:

Brightness = 100%

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Lv (5400K) / Lv (Max) x 100% > 75%

Lv(Brightness=0%) / Lv(Brightness=100%) x 100% ≤ 55%

Lv(Contrast=0%) / Lv(Contrast=100%) x 100% ≤ 30%

Contrast Ratio

(Max) –Condition:

CR

Contrast / Brightness = 100%
CCT = USER COLOR (R/G/B=100%)

CR(6500K) –Condition:

Same as the Contrast Ratio in section 4-6 “TFT LCD
PANEL”

Contrast / Brightness = 100%

CCT = 6500K

Saturation

Contrast = Default
Brightness = Default

Test pattern = 64-gray
Contrast = 100%

Brightness = 100%
Test pattern = 64-gray
Contrast = 100%
Brightness = 100%
Input signal level = 720mV
Test pattern = 64-gray

Preset Color Temperatures

sRGB

CR(6500K) / CR(Max) ≧ 93%

NO VISIBLE SATURATION

8~10 VISIBLE SATURA TION

8~10 VISIBLE SATURA TION

It should meet IEC 61966-2-1 (1999-10) standard.

CCT (typ) = 9300K (u’CCT=0.1888; v’ CCT=0.4457)

Preset 1

CCT (max) = 10250K, CCT (min) = 8500K
Δu’v’<0.01 (@ Full White pattern)
CCT (typ) = 6500K (u’CCT=0.1978; v’ CCT=0.4684)

Preset 2 (Primary)

CCT (max) = 6950K, CCT (min) = 6100K
Δu’v’<0.01 (@ Full White pattern)
CCT (typ) = 5400K (u’CCT=0.2044; v’ CCT=0.4808)

Preset 3

CCT (max) = 6185K, CCT (min) = 4935K
Δu’v’<0.01 (@ Full White pattern)
Each color preset shall be adjustable. Red, Green, and Blue shall be

Preset Color Temperature

individually controlled.

Video Cards Compatibility

Peaking Performance: Peaking is not adjustable

Raster Artifacts

● Video Artifacts : No visible streaking, sag, or smearing artifacts when driven by the specified video
cards in the primary mode and after user adjustment to best condition

● Power Supply, and Grounding Artifacts : No visible artifacts in any specified video mode within the
horizontal or vertical frequency range of the monitor

● Temperature Drift : Image shall not drift or lose fine-tune adjustment

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2-8 MECHANICAL

Dimension

Dimension (Desktop)
Width
Height (Height adjust to the bottom)
Depth
Monitor Weight
*Refer to Figure 1
Dimension (Head Only / Wall Mount)
Width
Height
Depth
Monitor Weight
*Refer to Figure 1

Ergonomics

Tilt Up step 1

Tilt Down

379mm

400mm

210mm

3.6kg/7.9Ib

379mm

338mm

68mm

3.3kg/7.3Ib

From 0º to +20º±3°

From 0° DOWN TO -5°±3°

Swivel Right N/A
Swivel Left N/A
Height Adjust N/A
Pivot N/A

Cabinet Material

Display Head Plastic Material
Neck/Base Plastic Material

Internal Plastic Cabinet Components

Front Bezel Color

Neck, Base, and Rear Cover Color

ABS-HB
ABS-HB

All internal plastic cabinet components shall be in compliance with the
requirements of TCO03
The reference for the bezel is the silver color (VA703m) and the
midnight gray color (VA703b) chip provided by ViewSonic
The reference for the bezel is the black color (VA703m) and the
midnight gray color (VA703b) chip provided by ViewSonic.

The color difference between any two cabinet components shall be less than 0.80
“Delta E”, in the 1976 CIE L*a*b Colorspace.

Rear logo color Mold type

The color drift due to UV-Light shall be less than 3.0 “Delta E” in the

Cabinet Color Drift Due To UV-Light

Cabinet Texture Mold-Tech # 11010 used on all external textured surfaces.

Samples

1976 CIE L*a*b colorspace. Testing shall be performed according to
the requirements of ASTM Test Method D4459-93.

The supplier shall submit textured color chips, plastic material
specifications, and Material Safety Data Sheets for approval.

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3. FRONT PANEL CONTROLS AND INDICATORS

Short Cuts Function from the button(s)

[1] Main Menu
[2] Auto Image Adjust

[▼] or [▲]

[▼]+ [▲] Recall both of Contrast and Brightness to default

[1] + [2]

[1] + [▼] + [▲]

(keep pushing 5 sec)

[1] + [▼] Power Lock
[1] + [▲] OSD Lock

Remark : All the short cuts function are only available while OSD off

Front Panel Hardware Controls

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

Power LED (Front Head)

Front Panel Controls (Head)
[ 1 ] [ 2 ] [ ][▼] [▲]

To immediately activate Contrast menu. It should be change to
Brightness OSD by push button [2]

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

White Balance (Not shown on user’s guide)

Green – On / Orange – Active Off
Dark = Soft Power Switch OFF
[ ] Power

[ 1 ] BUTTON 1
[ 2 ] Button 2
[▲] UP AR ROW BUTTON

[▼] DOWN ARROW BUTTON
Note: Power Button, Button 1 and Button 2 must be one-shot logic

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

Reaction Time OSD must fully appear within 0.5s after pushing [ 1 ]

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Main Menu Controls

Auto Image Adjust

Contrast/Brightness*
Audio Adjust ( for VA703m-4 only)

1

Volume*3, Mute*3

Color Adjust

sRGB, 9300K, 6500K(default), 5400, User Color [R, G, B]
Information
H Frequency, V Frequency, Pixel Clock, Resolution, Serial Number, Model Number,

“www.ViewSonic.com”

Manual Image Adjust

H. Size, H/V Position, Fine Tune, Sharpness*2

Setup Menu

Language [English, French, German, Italian, Spanish, Finnish, Simplified Chinese

Traditional Chinese, Japanese], Resolution Notice, OSD Position*1, OSD Timeout, OSD Background

Memory Recall

*1 These functions can be recalled to default by [▼]+ [▲]

2

*

These functions are not available under Native Resolution Mode

3

*

These functions setting can be recalled to default by [▼]+[▲] under audio mode
[Remark] Please refer to the detail in the Appendix C

Function descriptions

OSD Lock short cuts function for the buttons

The OSD lock will be activated by pressing the front panel control buttons "(1), & (▲)" for 10 seconds. If
the user then tries to access the OSD by pressing any of the buttons "1", "▼", "▲", "2" a message will
appear on the screen for 3 seconds showing "OSD Locked". The OSD lock will be deactivated by
pressing the front panel control buttons "(1), & (▲)" again for 10 seconds.
Note1: When the OSD is locked will lock all functions, including “Volume” and “Mute”
Note 2: Status bar indicating OSD Lock or Unlock is in progress and when complete it will indicate
“OSD Locked”
Note 3: OSD Lock should not lock Power Button and Power Lock function

Power Lock short cuts function for the buttons
The power button lock will be activated by pressing the front panel control buttons "(1), & (▼)" for 10
seconds. Locking the power button means that the user won't be able to turn off the LCD while the power
button is locked. If the user presses the power button while it is locked, a message will appear on the
screen for 3 seconds showing "Power Button Locked". It also means that with the power button locked,
the LCD would automatically turn back "On" when power is restored after a power failure. If the power
button is not in the locked mode, then power should return to it's previous state when power is restored
after a power failure. The power button lock will be deactivated by pressing the front panel control

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buttons "(1), & (▼)" again for 10 seconds
Note 1: Status bar indicating Power Button lock or unlock is in progress and when complete it will
indicate “Power Button Locked”

Note 2: Power should only be lockable in the “On State”

Memory Recall Actions

Memory Recall action on the analog and digital mode as below

1. Set the factory defaults as shown in Section 4-7

2. Clean all the mode setting buffer

3. Execute Auto Image Adjust

Note: Memory Recall should have no effect for Language, Power Lock, User Color Settings

Resolution Notice Actions

1. Resolution Notice OSD should show on screen after changing to non-native mode for 30 sec

2. The OSD should disappear after 10 sec or by pushing button [1] or [2]
Resolution Notice function should be disabled when push button [2] under Resolution Notice OSD

0-Touch™ Function Actions

1. Execute Auto Image Adjust when new mode detected, and save the settings to buffer for further use

2. It should be reset by Memory Recall function
(Should not reset by power off, power unplug and others)
OSD Auto Save
The OSD shall save new settings when it is turned off by the user or when it times out. There shall not
be a separate save

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Factory Defaults

Item Defaults Item Defaults

Contrast 70% Volume

50%

( for VA703m-4 only)

Brightness 100% Balance N/A

Color T em perature 6500K Treble N/A

Sharpness 0% Bass N/A

OSD H. Position 50% 720x400/640x400 720x400

640x480@60Hz

OSD V. Position 50%

640x480@60Hz

720x480@60Hz

In SOG and Composite,

OSD Time Out 15 Sec

720x480@60Hz

N/A

640x480@60Hz

In SOG and Composite,

OSD Background Enabled

1152x864@75Hz

N/A

1152x870@75Hz

In SOG and Composite,

Resolution Notice Enabled

1280x768@60/75/85Hz

N/A

1024x768@60/75/85Hz

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4. Circuit Description

A. AC-DC CONVERTER

The power supply with a high-integrated green-mode PWM controller provides several features to
enhance the performance of power flyback converters.

U801 is a PWM controller and provides many protection functions.

U802 is a photo couple to transfer the feedback signal from the second side which U803 detected both of
the output DC voltage on 5V and 24V.

Z802 detected the working voltage on U801 and Q802 would pull down the voltage on U801 pin5 to
shut down U801 if feedback loop was failed.

R828 would be a dynamic load which was active while backlight was turned off and system still
working on, this kept 24V output voltage under 32V to protect the panel. After system went to
power saving mode, the R828 would no loaded. This was detected by Z803 active the R828 to load or
not.

B，Scaling Controller

Overview

Realtek RTD2523B series products are all-in-one LCD monitor controllers support up to
SXGA/XGA(optional), and integrate Realtek high performance ADC, TMDS Rx(optional), scaling engine,
OSD engine, LVDS TX, RSDS TX and so on. Moreover, all products are pin compatible in low pin count
package to save cost and make the design easier

General

z Embedded dual DDC support DDC1, DDC2B, DDC/CI
z Zoom scaling up and down
z Embedded Pattern Generator
z No external memory required.
z Require only one crystal to generate all timing
z Embedded reset control output
z Embedded crystal output to MICROP
z 3 channels 8 bits PWM output, and selectable PWM clock frequency.

Pin Description
(I/O Legend: A = Analog, I = Input, O = Output, P = Power, G = Ground)

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 ADC: 15 pins

Name

ADC_GND AG 27 ADC ground
ADC_REFIO AP 28 ADC band-gap voltage de-coupling 1.20V
ADC_VDD AP 29 Analog power (3.3V)
BLUE+ AI 30 Analog input from BLUE channel
BLUE- AI 31 Analog input ground from BLUE channel
ADC_GND AG 32 ADC ground
SOG/ADC_TEST AIO 33 SOG in/ADC test pin
GREEN+ AI 34 Analog input from GREEN channel
GREEN- AI 35 Analog input ground from GREEN

ADCB_VDD AP 36 Analog power (3.3V)
RED+ AI 37 Analog input from RED channel
RED- AI 38 Analog input ground from RED channel
ADC_GND AG 39 Analog ground
ADC_GND AG 40 Analog ground
ADC_VDD AP 41 Analog power (3.3V)
AHS AI 42 Analog HS input (10), (4), (5)

AVS AI 43 Analog VS input (2), (4), (5)



PLL: 8 pins

Name

XO AI 1 Reference clock output
XI AO 2 Reference clock input
DPLL_GND AG 3 Ground for digital PLL
DPLL_VDD AP 4 Power for digital PLL (3.3V)
APLL_VDD AP 5 Power for multi-phase PLL (3.3V)
PLL_TEST1 AIO 6 Test Pin 1 / IRQ#
PLL_TEST2 AIO 7 Test Pin 2/Power-on-latch for crystal out

APLL_GND AG 8 Ground for multi-phase PLL

I/O

I/O

Pin No Description Note

channel

Pin No Description Note

Frequency

 Control Interface: 7 pins

Name I/O Pin No Description Note

SDIO [0] IO 54 Serial control I/F data in / Parallel port

data [0]
SDIO [1] / TCON [4] /
BBLU [0]
SDIO [2] / TCON [3] /
BBLU [1]
SDIO [3] / PWM2 /
TCON [2]
SCLK I 50 Serial control I/F clock (2), (3), (5)
SCSB I 111 Serial control I/F chip select (2), (3), (5)
RESET O 56 RESET output for Micron (2), (5), (6) / 2mA

IO 53 Parallel port data [1] / TCON [4] / TTL

BBLU [0]

IO 52 Parallel port data [2] / TCON [3] / TTL

BBLU [1]

IO 51 Parallel port data [1] / TCON [4] / PWM2 (1), (2), (3), / 2mA

(2), (3), / 2mA

(1), (2), (3), / 2mA

(1), (2), (3), / 2mA

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 Display & TCON/VIDEO-8 Port: 54 pins

■:LVDS+RSDS+TTLO ■:RSDS+TTLO ■:RSDS+TTLIO■:TTLO ■:TTLIO

Pin

NO.

51 S[3] /

52 S[2] /

53 S[1] /

55 PWM2 /

59 BB3P BB3P NC BBLU [7] BBLU [7]
60 BB3N BB3N NC BBLU [6] BBLU [6]

6-bits

Dual RSDS

TCON[2] /
PWM2

TCON[3]

TCON[4]

COUT /
TCON[13]

6 bits

Single RSDS

S[3] /
TCON[2] /
PWM2
S[2] /
TCON[3]

S[1] /
TCON[4]
PWM2 /
COUT /
TCON[13]

8/6 bits

Dual/Single

LV DS

S[3] /
TCON[2] /
PWM2
S[2] /
TCON[3]

S[1] /
TCON[4]
PWM2 /
COUT /
TCON[13]

8 bits

Dual/Single

TTL

S[3] /
TCON[2] /
PWM2

S[2]

/BBLU[1] /
TCON[3]
S[1]/ BBLU[0]
/ TCON[4]
PWM2 /
COUT /
TCON[13]

6 bits

Dual/Single

TTL

S[3] /
TCON[2] /
PWM2
S[2] /
TCON[3]

S[1] /
TCON[4]
PWM2 /
COUT /
TCON[13]

(1), (2), (3)/

(1), (2), (3)/

(1), (2), (3)/

(1), (2), (3)/

Note

2mA

2mA

2mA

2mA

61 BB2P BB2P NC BBLU [5] BBLU [5]
62 BB2N BB2N NC BBLU [4] BBLU [4]
63 BB1P BB1P NC BBLU [3]/T0 BBLU [3]
64 BB1N BB1N NC BBLU [2]/T1 BBLU [2]
65 BCLKP BCLKP NC BGRN [1]/T2 TCON [6]
66 BCLKN BCLKN NC BGRN [0]/T3 TCON [5]
67 BG3P BG3P NC BGRN [7] BGRN [7]
68 BG3N BG3N NC BGRN [6] BGRN [6]
73 BG2P BG2P TODP BGRN [5]/T4 BGRN [5]
74 BG2N BG2N TODN BGRN [4]/T5 BGRN [4]
75 BG1P BG1P TOCLKP BGRN [3]/T6 BGRN [3]
76 BG1N BG1N TOCLKN BGRN [2]/T7 BGRN [2]
77 BR3P BR3P TOCP BRED [7]/T8 BRED [7]
78 BR3N BR3N TOCN BRED [6]/T9 BRED [6]
79 BR2P BR2P TOBP BRED [5]/T10 BRED [5]
80 BR2N BR2N TOBP BRED [4]/T11 BRED [4]
81 BR1P BR1P TOAP BRED [3]/T12 BRED [3]
82 BR1N BR1N TOAP BRED [2]/T13 BRED [2]
85 AB3P NC TEDP ABLU [7]/T14 ABLU [7]
86 AB3N NC TEDN ABLU [6]/T15 ABLU [6]
87 AB2P NC TECLKP ABLU [5]/T16 ABLU [5]
88 AB2N NC TECLKN ABLU [4]/T17 ABLU [4]

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89 AB1P NC TECP ABLU [3]/T18 ABLU [3]
90 AB1N NC TECN ABLU [2]/T19 ABLU [2]
91 ACLKP NC TEBP ABLU [1]/T20 TCON [1]
92 ACLKN NC TEBN ABLU [0]/T21 TCON [0]
93 AG3P NC TEAP AGRN [7]/T22 AGRN [7]
94 AG3N NC TEAN AGRN [6]/T23 AGRN [6]

99 AG2P TCON [11] NC AGRN [5]/T24 AGRN [5]
100 AG2N TCON [10] NC AGRN [4]/T25 AGRN [4]
101 AG1P TCON [9] NC AGRN [3]/T26 AGRN [3]
102 AG1N TCON [8] NC AGRN [2]/T27 AGRN [2]
103 AR3P TCON [7] NC ARED [7]/T28 ARED [7]
104 AR3N TCON [6] NC ARED [6]/T29 ARED [6]
105 AR2P TCON [5] NC ARED [5]/TH ARED [5]
106 AR2N TCON [1] NC ARED [4]/TV ARED [4]
107 AR1P TCON [0] NC ARED [3]/TE ARED [3]
108 AR1N NC NC ARED [2 ]/TK ARED [2]
113 PWM2 /

COUT /
TCON[12]

114 TCON [11]

/V[0]

115 TCON [10]

/V[1]

116 TCON [9] /

V[2]

117 TCON [8] /

V[3]

118 TCON [7] /

V[4]

119 TCON [6] /

V[5]

122 TCON [5] /

PWM2 /
COUT /
TCON[12]
V [0] V [0] ARED [0] TCON [11] (1), (7), (8)

V [1] V [1] BRED [1] TCON [10] (1), (7), (8)

V [2] V [2] BRED [0] TCON [9] (1), (7), (8)

V [3] V [3] AGRN [1] TCON [8] (1), (7), (8)

V [4] V [4] AGRN [0] TCON [7] (1), (7), (8)

V [5] V [5] DHS DHS (1), (7), (8)

V [6] V [6] DVS DVS (1), (7), (8)

PWM2 /
COUT /
TCON[12]

ARED [1] PWM2 /

COUT /
TCON[12]

(9)

V[6]

123 TCON [1] /

V[7]

124 TCON [0] /

VCLK

V [7] V [7] DENA DENA (1 ), (7), (8)

VCLK VCLK DCLK / TCLK DCLK / TCLK (1), (7), (8)

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 TMDS: 18 pins

Name I/O Pin No

Description

Note

TMDS_TST/ PWM1 AIO 9 TMDS_TEST Pin / PWM1 /

Power-on-latch for serial / parallel port

TMDS_GND G 10
TMDS_VDD P 11 (3.3V)
EXT_RES A 12 Impedance Match Reference.
TMDS_VDD P 13 (3.3V)
RX2P I 14 Differential Data Input
RX2N I 15 Differential Data Input
TMDS_GND G 16
RX1P I 17 Differential Data Input
RX1N I 18 Differential Data Input
TMDS_VDD P 19 (3.3V)
RX0P I 20 Differential Data Input
RX0N I 21 Differential Data Input
TMDS_GND G 22
RXCP I 23 Differential Data Input
RXCN I 24 Differential Data Input
TMDS_GND G 25
TMDS_VDD P 26 (3.3V)

 PWM Interface: 3-2=1 pin (PWM1, PWM2 can be selected from 1 of 3 possible pins.)

Name

PWM2 / TCON [2] / S [3] O 51 PWM2 / TCON [2] / SDIO [3] (1), (2), (3), (5), (8),
PWM2 / TCON [13] / COUT O 55 PWM2 / TCON [13] / Crystal out (2), (8), (9)
PWM2 / TCON [12] / COUT O 113 PWM2 / TCON [12] / Crystal out (2), (8), (9)

PWM1 / TMDS_TST AIO 9

PWM1 / DDCSDA / TCON [1] /

BBLU [0]

PWM1 / DDCSDA2 (HDCP) /

TCON [7]

PWM0 / REFCLK IO 112

I/O

IO 47

IO 125

Pin No Description Note

PWM1/ TMDS_TEST Pin /

Power-on-latch for serial / parallel port

PWM1 / DDC serial control I/F data input

/ output / TCON [4]

PWM1 / DDC serial control I/F data input

/ output / TCON [7]

PWM0 / (In / out) test pin for DCLK /

Video8 even-odd signal

(2), (7), (8)

(1), (2), (3), (5), (8),

(1), (2), (3), (5), (8),

(2), (9)

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 DDC Channel: 4 pins

Name I/O Pin No Description Note
DDCSCL / TCON [0] /
BBLU [1]
DDCSDA / TCON [1] /
PWM1 / BBLU [0]
DDCSCL2 (HDCP) /
TCON [5]
DDCSDA2 (HDCP) /
TCON [7] /PWM1

I 46 DDC serial control I/F clock / TCON [0] /

IO 47 DDC serial control I/F data input / output

I 126 DDC serial control I/F clock / TCON [5] (2), (3), (5)

IO 125 DDC serial control I/F data input / output

 Power & Ground: 22 pins

Name

3.3V Power P 49,121 VCCIO: 2

3.3V Ground G 48,120 GNDIO: 2

3.3V Power P 58,71,83,95,110 PVCC: 5

3.3V Ground G 57,72,84,96,109 PGND: 5

2.5V Power P 45,69,98,127 VCCK: 4

I/O

TTL BBLU [1]

/ TCON [1] / PWM1 / TTL BBLU [0]

/ TCON [7] / PWM1

Pin No Description

(2), (3), (5)

(1), (2), (3), (5), (6),
(8)/ 8mA /no slew

(1), (2), (3), (5), (6),
(8)/ 8mA /no slew

2.5V Ground G 44,70,97,128 GNDIK: 4

Note: (1) TTL compatible CMOS Input (Vt=1.7V); VCC=3.3V;

(2) 5V tolerance pad;
(3) Internal 75K Ohms pull high resistor.
(4) Internal 75K Ohms pull low resistor.
(5) Schmitt trigger CMOS Input (Vt=1.4-~2.2V);
(6) Open-Drain, Output Drive low & Pull-high.
(7) Bi-directional input/output
(8) Programmable driving current (2~10mA)
(9) TTL output 5V & 3.3V
(10) 4V tolerance pad

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C, MTV512M

The MTV512M micro-controller is an 8051 CPU core
embedded device especially tailored for flat panel
display applications. It includes an 8051 CPU core,
768-byte SRAM, 4 channels of 6-bit ADC, 3 external
counters/timers, 6 channels of PWM DAC, VESA
DDC interface, and a 64K-byte internal program
Flash-ROM memory in 44-pin PLCC package

FEATURES

• 8051 core, 12MHz operating frequency with
single/double CPU clock option

• 0.35um process; 3.3V power supply

• 768-byte RAM; 64K-byte program Flash memory

• Maximum 6 channels of PWM DAC

• Compliant with VESA DDC1/2B/2Bi/2B+ standard

• Dual slave IIC addresses; two H/W auto transfer
DDC1/DDC2x data for both D-sub and DVI
interfaces

• Watchdog timer with programmable interval

• Support external counters/timers, 1 & 2

• Single/double frequency clock output

• Two external interrupts, INT1 is shared with Slave
IIC interrupt source.

• Maximum 4 channels of 6-bit ADC

• Flash-ROM code protection selection

• 44-pin PLCC package

D. INVERTER

In order to drive the CCFLs embedded in the panel module, there is a push-pull inverter to convert by the controller. from
input 24V up to hundreds of AC voltage output peak to peak.
The inverter is formed by symmetric in order to drive the separate lamp modules.
The input stage consists of a PWM controller, push-pull inverter, and switching MOSFET to conv ert DC input into AC output.
The output stage consists of a tuning capacitor, transformer, and push-pull MOSFET pair to boost AC output up to hundreds of
voltage peak to peak.
And one resister is serial to lamp for output volt a ge feedback.
There are two signals which control the inverter come from system to turn on the inverter and control brightness. Logic “low”
level which send to U901 is turn on the inverter.
BL-ADJ signal control brightness by DC level which was integral from PWM signal.

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5. Adjustment Procedure

1. Function test

1.1 products

17” LCD Monitor

1.2 test equipment

Color video Signal& pattern (Or PC with SXGA resolution and a sound card)

1.3 Test Condition

Before function test and alignment ,each LCD Monitor should be warmed up at least

30 minutes with the following conditions:

A: in roon temperature

B with full white screen ,RGB ,and black

C. with cycled display model:

1280 x 1024 @ 60Hz

1.4 Test display& Pattern

1.4.1 Compatible model

Item Timing Analog

1 640 x 350 @ 70Hz, 31.5kHz
2 640 x 480 @ 50Hz, 24.68KHZ
3 640 x 480 @ 60Hz, 31.5kHz
4 MAC 640 x 480 @ 67Hz, 35.0kHz
5 640 x 480 @ 72Hz, 37.9kHz
6 640 x 480 @ 75Hz, 37.5kHz
7 640 x 480 @ 85Hz, 43.27kHz
8 720 x 400 @ 70Hz, 31.5kHz

9 800 x 600 @ 56Hz, 35.1kHz
10 800 x 600 @ 60Hz, 37.9kHz
11 800 x 600 @ 72Hz, 48.1kHz
12 800 x 600 @ 75Hz, 46.9kHz
13 800 x 600 @ 85Hz, 53.7kHz
14 MAC 832 x 624 @ 75Hz, 49.7kHz
15 1024 x 768 @ 60Hz, 48.4kHz
16 1024 x 768 @ 70Hz, 56.5kHz
17 1024 x 768 @ 72Hz, 58.1kHz
18 1024 x 768 @ 75Hz, 60.0kHz
19 1024 x 768 @ 85Hz, 68.67KHZ
20 1152 x 864 @ 75Hz, 67.5KHZ
21 MAC 1152x870@75HZ, 68.68KHZ
22 1280 x 960 @ 60Hz, 44.93KHZ
23 1280 x 960 @75Hz, 56.25KHZ
24 1280 x 1024 @ 60Hz, 63.98KHZ
25 1280 x 1024 @ 75Hz, 79.97KHZ

*1. Tolerance ≧ ± 2kHz.

Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes

*2. Any timing not in the list, it should display as normal or show o n “OUT OF RANGE” OSD message without

blanking.

*3. The image quality of 85Hz mode might be worse than 75Hz.

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