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 - [phone]

Copyright
Copyright ¤2002 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
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
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TABLE OF CONTENTS
1. PRECAUTIONS AND NOTICES...............................................................................1
2. SPECIFICATIONS.....................................................................................................2
3.
TIMING CHART........................................................................................................15
4.
FRONT PANEL CONTROLFUNCTION DESCRIPTION........................................21
5.
CIRCUIT DESCRIPTION ........................................................................................31
6.
WAVEFORMS.........................................................................................................37
7.
TROUBLE SHOOTING FLOW CHART...................................................................40
12.SCHEMATIC DIAGRAMS......................................................................................58
10.
EXPLODED PARTS VIEW......................................................................................51
8.
ADJUSTING PROCEDURE....................................................................................46
9.
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.
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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)
(automatically)
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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
1.8m
1.8m
1.8m
1
1
1
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
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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)
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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
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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
15
10
5 1
6
11
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
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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
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