ViewSonic VX500PLUS-1 User manual

Service Manual

ViewSonic VX500+-1

Model No. VLCDS23897-1W

15” Color TFT LCD Display

(VX500+-1_SM_576-Rev.1a-May 2002)

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

reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or

computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,

manual or otherwise, without the prior written permission of ViewSonic Corporation.

Disclaimer

ViewSonic makes no representations or warranties, either expressed or implied, with respect to the

contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular

purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from time

to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or

changes.

Trademarks

ViewSonic is a registered trademark of ViewSonic Corporation.

All other trademarks used within this document are the property of their respective owners.

Revision History

Revision Date Description Of Changes Approval

1a 7/31/02 Initial Reversion DCN-2352 K.Yang

ViewSonic Corporation Confidential –DoNotCopy VX500+-1

iii

TABLE OF CONTENTS

1. PRECAUTIONS AND NOTICES...............................................................................1

2. SPECIFICATIONS.....................................................................................................2

TIMING CHART........................................................................................................15

FRONT PANEL CONTROLFUNCTION DESCRIPTION........................................21

CIRCUIT DESCRIPTION ........................................................................................31

WAVEFORMS.........................................................................................................37

TROUBLE SHOOTING FLOW CHART...................................................................40

12.SCHEMATIC DIAGRAMS......................................................................................58

10.

EXPLODED PARTS VIEW......................................................................................51

ADJUSTING PROCEDURE....................................................................................46

SPARE PARTS LIST..............................................................................................49

11. BLOCK DIAGRAM..................................................................................................57

13.PCB LAYOUT DIAGRAMS.....................................................................................64

1. PRECAUTIONS AND NOTICES

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

outlined in the user manual for this product.

zRead all of these instructions.

zSave these instructions for later use.

zFollow all warnings and instructions marked on the product.

zDo not use this product near water.

zThis display should be installed on a solid horizontal base.

zWhen cleaning, use only a neutral detergent cleaner with a soft damp cloth. Do not spray

with liquid or aerosol cleaners.

zDo not expose this display to direct sunlight or heat. Hot air may cause damage to the cabinet

and other parts.

zAdequate ventilation must be maintained to ensure reliable and continued operation and to

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

install the display in a place where ventilation may be hindered.

zDo not install this display near a motor or transformer where strong magnetism is generated.

Images on the display will become distorted and the color irregular.

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

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

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

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

similar surface. This product should never be placed near or over a radiator or heat register. This

product should not be placed in a built-in installation unless proper ventilation is provided.

ViewSonic Corporation Confidential –DoNotCopy VX500+-1

1. Scope

The following specifications are applicable to model VX500+ 15 inch color LCD monitor.

2. General Description (Quick Reference)

Sanyo 15.0” XGA TFTLCD

Size

Effective Display Size

Pixel Pitch

Resolution

Brightness

Contrast Ratio

Color

Viewing Angle

Surface treatment

15.0 inches diagonal

304.1 mm X 228.1 mm (typical)

0.297 mm X 0.297 mm

1024 x 768 dot (XGA)

(300) cd / m² (typ.), 230 min.

(500): 1(typ.), 300 min.

16.7M

135° Horizontal (typ)

125° Vertical (typ)

CR>10:1

Anti-Glare

Input Signals RGB

Digital

Analog 0.7 Vp-p / 75Ө

Separate sync.

Composite sync

Sync-On-Green

TMDS.

Positive Polarity

TTL level

Input connector Analog mini D-sub 15 pin x 1

Digital DVI-D x 1

Audio mini-din 2 channel x 2

Micro-phone jack

Speaker2Wx2(Max)

Main IC GM5010

DisplayColors16.7 million colors

Preset Timings XGA/60Hz, 70Hz, 75Hz

SVGA/56Hz, 60Hz, 72Hz, 75Hz

VGA/60Hz, 72Hz, 75Hz

Dos-text/70Hz

Synchronization Horizontal

Vertical

Non-interlaced

30 kHz to 62 kHz

50 Hz to 75 Hz

Max Pixel Rate 85Mhz

(automatically)

ViewSonic Corporation Confidential –DoNotCopy VX500+-1

2.SPECIFICATIONS

Resolution Horizontal

Vertical

1024 dots

768 lines

Active Display

Area

Horizontal

Vertical

304.1 mm (typical)

228.1 mm (typical)

(Active display area is dependent upon signal timings)

Power Supply

Rating

AC adapter input

DC input

AC90V-264V 50 / 60 Hz

DC 12V

AC Power

Consumption

38W

less than 2W

On mode

Off mode (w/o audio cable connected )

Current Rating AC input

DC input

0.7A

4.0A

@AC 100-240V

@DC 12.0V

Dimensions Net

Gross

360 (W) x 342 (H) x 139.5 (D) mm

476 (W) x 414 (H) x 222 (D) mm

Weight Net

Gross

3.9Kg

5.9Kg

Environmental

Conditions

Operating Temperature

Operating Humidity

Storage Temperature

Storage Humidity

0 to 40°C (PANEL SURFACE)

10 to 95% (no condensation, < wetbulb 29 degree C)

-20 to 60°C (PANEL SURFACE)

10 to 95% (no condensation, < wetbulb 29 degree C)

Accessories AC power cord-UL

AC power cord-Schuko

Analog VGA cable

DVI-D cable

Audio cable

Micphone cable

Viewsonic CD-Wizard

1.8m

Regulatory

Standards

UL, CSA or cUL, CB Report, CE, FCC-B, DOC-B, TÜV/Ergo (which covers

ISO13406-2 and MPRIII), TUV/GS, PCT (GOST-R) with 20 Hygienic

certificates, PCBC (B Mark), SEMKO, DEMKO, FIMKO, NEMKO, BSMI,

VCCI, CCIB/EMC, CCC, PSB (Singapore Safety), TCO’99, NOM and

Argentina IRAM (thru TUV).

Osd Language English, French, German, Spanish, Italian, Finnish

ViewSonic Corporation Confidential –DoNotCopy VX500+-1

Others Tilt Angle 20° up / 5° down

Power Saving System

User Control by touch sensor keypad with On Screen Display-

VESA DDC1/2B compatible (digital port DDC2B only)

3. Electrical Characteristics

3.1 Power Supply

3.1.1 AC Input (AC Adapter)

Input Voltage AC90-264V

Frequency 47 / 63Hz

Power Consumption:

38 W (typ) on mode

less than 2W power save mode ( audio cable not

connected )

Current Rating 0.7A @ AC100-240V

3.1.2 DC Input

Input Voltage DC 12 V

CurrentRating 4.0A

3.2 LCD

LCD Torisan (TM150XG-26L06A)

Effective display size 304.1mm (H) x 228.1 mm (V)

15.0” / 38 cm diagonal

Pixel number 1024 x 768 pixels

Color filter arrangement R.G.B. vertical stripe

Display method TFT, normally white

Drive method Active matrix (TFT)

Dot pitch 0.099 (H) x 0.297 (V) mm

Pixel pitch 0.297 (H) x 0.297 (V) mm

Dot number 1024 x 768 x 3 dots

Backlight Edge-lighting type with 4 CCFLs

(Cold Cathode Fluorescent Tube)

Brightness 230 cd / m2

(min)

Contrast ratio 300:1 (min)

Display color 16.7 million

Minimum viewing angle 110° Horizontal (min) 100° Vertical (min)

(Contrast ratio>10 at Ta=25°C, 77°F)

Response time 25 msec (Typical at 25 degree C)

ViewSonic Corporation Confidential –DoNotCopy VX500+-1

3.3 Interface Signals

3.3.1 RGB Video Signals

3.3.1.1 Separate Sync. Signals

Analog R, G, B 0 - 0.7 Vp-p

Signal Level 75Ө± 5%

Sync Level TTL level

Sync Polarity independent

3.3.1.2 Sync On Green, Composite Sync

3.3.2 TMDS digital Signals

3.3.2.1 Video type

DVI 1.0 compliant

3.3.3 Audio spec.

3.3.3.1 Line input connection

3.5 mm stereo jack x 1

3.3.3.2 Line input signal & impedance

1.0 Vrms, 10 kOhm

3.3.3.3 OUTPUT SIGNAL AT SPEAKER TERMINAL

Vp-p(out) >= 5 Vp-p @ < 10 % distortion

3.3.3.4 Frequency Response

300 Hz – 20 Khz

3.3.3.5 Connector PC99 requirement Audio in

Lime Green pantone # 577C

3.3.3.6 Cable length

1.8 m

3.3.3.7 Audio DPMS

Speakers stay on when the rest of the monitor is in power saving.

3.3.3.8 Speakers

Impedance 4 Ohm

Output Wattage 2W (max.) x 2

3.3.4 Input Signal Connectors

3.3.4.1 Analog RGB Video Input : 15 pin mini D-sub

PIN NO. Separate Sync

ViewSonic Corporation Confidential –DoNotCopy VX500+-1

1 RED

2 GREEN

3 BLUE

4 GROUND

5 GROUND

6 GROUND

7 GROUND

8 GROUND

9 +5V

10 GROUND

11 N.C

12 SDA

13 H.SYNC

14 V.SYNC

15 SCL

5 1

3.3.4.2 Digital TMDS DVI-D Connector

24 PIN DVI-D CONNECTOR PIN ASSIGNMENT

Pin No. Signal Name Description

1 RX2- TMDS negative differential input, channel 2

2 RX2+ TMDS positive differential input, channel 2

3 GND Logic Ground

4 Reserved 4 Reserved. No connection

5 Reserved 5 Reserved. No connection

6 DDC-CLK DDC2B Clock

7 DDC-DAT DDC2B Data

ViewSonic Corporation Confidential –DoNotCopy VX500+-1

8 Reserved 8 Reserved. No connection

9 RX1- TMDS negative differential input, channel 1

10 RX1+ TMDS positive differential input, channel 1

11 GND Logic Ground

12 Reserved 12 Reserved. No connection

13 Reserved 13 Reserved. No connection

14 VCCX Power

15 GND Logic Ground

16 SENS SENSE Pin, Pull High

17 RX0- TMDS negative differential input, channel 0

18 RX0+ TMDS positive differential input, channel 0

19 GND Logic Ground

20 Reserved 20 Reserved. No connection

21 Reserved 21 Reserved. No connection

22 GND Logic Ground

23 RXC+ TMDS positive differential input, reference clock

24 RXC- TMDS negative differential input, reference clock

3.3.4.3 Audio Connector

3.5 mm Stereo jack x 1,

3.5mm Microphone jack x 1

3.3.5 Signal Timing

3.3.5.1 User Timing Mode memory

always do auto image adjust after timing mode change

3.3.5.2 Timing mode Change

maximum time for mode Change with auto image adjust 7 sec.

3.3.5.3 Signal Timing Table

The factory test input video signal is defined as the following table:

Preset H.sync V.sync SYNC POL. Video Mode Description

No. Frequency Frequency H-SYNC V-SYNC

MOD [1] 31.468 1.0KHz 70.0 1.0Hz + - 640X350(70) Text mode

MOD [2] 31.468 1.0KHz 70.0 1.0Hz - + 720X400(70) Dos text

ViewSonic Corporation Confidential –DoNotCopy VX500+-1

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