ViewSonic VG700B User manual

Service Manual
Model No. VLCDS23719-3W
17” Color TFT LCD Display
ViewSonic VG700b
ViewSonic381 Brea Canyon Road, Walnut, California 91789 USA - [phone]
(VG700b-1_SM_604 - Rev. 1a – Oct 2002)

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 10/23/02 Initial Release DCN-2660 C.Shen
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This manual is prepared for the maintenance service for the VG700b series Flat
Panel Monitor. Maintenance procedures described in this manual are intended to isolate
faulty parts and replace them in the field. It also aims to serve as a guide in procuring
replacement parts for this product.
This manual is copyrighted and all rights are reserved. This product may not in
whole or in part be copied photocopied translated or reduced to any electronic or
machine readable form without prior written consent except for copies retained by the
purchaser for backup purpose.
This manual includes system overview major system assembly components
description and the Troubleshooting makes explanations on how to detect errors. It
also includes a flow chart for checking or correcting faults.
No Warranty or representation, either expressed or implied, is made with
respect to this documentation, its quality, performance, merchantability or fitness
for particular purpose.
No event will the vendor be liable for direct, indirect, special, incidental or
consequential damages arising out of the user or inability to use this product or
documentation.
Notice:
The information found in this manual is subject to change without prior notice. Any subsequent
changes made to the data herein will be incorporated in future edition.
Preface
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Table of Contents
Chapter 1 Introduction 1-1
1-1 The Appropriate Operation 1-1
1-2 Product ighlight 1-2
1-3 Technical Specification 1-2
Chapter 2 Mechanical Construction 2-1
2-1 Package Overview 2-1
2-2 Exploded Overview 2-3
Chapter 3 Procedure of Disassembly 3-1
3-1 Disassembly of Stand Unit and Main Body 3-1
3-2 Disassembly of Control Board, Cosmetic Cap and Front Cover 3-2
3-3 Disassembly of LCD Panel and Main Board 3-3
3-4 Disassembly of Support Bracket, Speakers and all wires 3-4
Chapter 4 Function of Boards 4-1
4-1 Main Board 4-1
4-2 Control Board 4-4
4-3 Inverter Board 4-5
Chapter 5 Troubleshooting Procedure 5-1
5-1 Equipment Needed 5-1
5-2 Main Procedure 5-1
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Chapter 6 Function Test and Alignment Procedure 6-1
6-1 Product and Test Equipment 6-1
6-2 ot Key (Service Function) 6-1
6-3 Test Condition 6-1
6-4 Test Display Modes & Pattern 6-2
6-5 Function Test and Alignment Procedure 6-5
6-6 Cleaning 6-7
6-7 Inspection Standard 6-7
Chapter 7 Firmware Upgrade Procedure 7-1
7-1 Equipment Needed 7-1
7-2 ardware Setup Procedure 7-2
7-3 Firmware Upgrade Procedure 7-2
Chapter 8 EDID Update Procedure 8-1
8-1 Equipment Needed 8-1
8-2 ardware Setup Procedure 8-2
8-3 DDC Keyin Procedure 8-2
Chapter 9 Panel Specification 9-1
9-1 LCD Panel [Model#M170EN04]
Chapter 10 Packing for Shipping 10-1
10-1 Package 10-1
Chapter 11 Appendix 11-1
11-1 The Serial Number System Definition 11-1
Chapter
Chapter
3
Complete parts list
PCB Layout
1
1
2Schematic Diagrams
4
Chapter112-1~12-
13-1~13-
14-1~14-5
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9-1
7
3

VG700b Series Service Manual
1-1
VG700b series
Chapter 1 Introduction
1-1 The Appropriate Operation
This manual provides an integral technical information you need to maintain the
LCD Monitor. And this manual is applied to the model of 1280 1024 pixels color TFT LCD
Monitor with a 17 flat panel screen.
This manual is for the technicians and people who have the electronic background.
Send the product back to the distributor for repairing and do not attempt to do anything
which is complex or not mentioned in the troubleshooting.
Turn off the Product before cleaning.
Use only a dry soft cloth when cleaning the LCD panel surface.
Use a soft cloth moistured with mild detergent to clean the display housing.
Use only high quality and safety approved AC/DC power Adapter.
Disconnect the Power Plug from AC outlet if the Product is not used for a long
period of time.
Do not touch the LCD panel surface with sharp or hard objects.
Do not use abrasive cleaners, waxes or solvents for your cleaning.
Do not operate the product under the following conditions:
Extremely hot, cold or humid environment.
Areas susceptible to excessive dusts and dirt
Near any applicance generating a strong magnetic field.
Place in direct sunlight.
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VG700b Series Service Manual
1-2
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1-2 Product Highlight
Analog signal input
Active matrix TFT LCD technology
1280 1024 addressable pixels, 60Hz
30-82kHz Horizontal Frequency
50-75Hz Vertical Refresh Rate
Auto Image Adjustment
Multifunction OSD user controls
VESA DPMS Power saving
Resolution Compatibility: 640 350, 640 480, 720 400, 800 600,
832 624, 1024 768, 1152 870, 1280 1024
1-3 Technical Specification
I.) AU Panel:(M170EN04)
Active matrix TN TFT color LCD
17 diagonal screen size
1280 1024 addressable pixels
0.264mm 0.264mm pixel pitch
Lamp number : 4 CCFLs edge-light (2 top/2 bottom)
Backlight Life: 50,000 hrs (Typical), 30,000 hrs (Min.)
Active Size 337.92mm(H) 270.34mm(V)
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2 0 cd/m2 (max),brightness,
8250 cd/m2(typ),
2 0 cd/m2(min)
0
40:1 (max) contrast ratio,
5
400:1(typ),
250:1(min)

VG700b Series Service Manual
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II.) Power Supply
Input Voltage Range: 90 to 265 VAC
Input Frequency Range: 47 to 63 Hz
Output V[email protected] Load: 12V DC +/- 5%
Over Current Protection 4A Typical at 12VDC
Power Dissipation 40 Watts(Max.)
III.) Audio
Line Input Connection 3.5mm Stereo Jack
Line Input Signal 1.0Vrms
Maximum Power Output 3W@ <8% Distortion
IV.) y Preset Modes
VGA 640 350@70Hz (25.176MHz)
VESA 640 480@60Hz (25.175MHz)
MAC 640 480@67Hz (31.500MHz)
VESA 640 480@72Hz (31.50MHz)
VESA 640 480@75Hz (31.50MHz)
VESA 720 400@70Hz (28.320MHz)
VESA 800 600@56Hz (36.00MHz)
VESA 800 6.00@60Hz (40.00MHz)
VESA 800 600@72Hz (50.00MHz)
VESA 800 600@75Hz (49.5MHz)
MAC 832 624@75Hz (57.272MHz)
VESA 1024 768@60Hz (65MHz)
VESA 1024 768@70Hz (75.000MHz)
VESA 1024 768@72Hz (78.000MHz)
MAC 1024 768@75Hz (80.000MHz)
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VG700b Series Service Manual
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VESA 1024 768@75Hz (78.750MHz)
MAC 1152 870@75Hz
VESA 1280 1024@60Hz
VESA 1280 1024@70Hz
VESA 1280 1024@75Hz
V.) Mechanical & Environmental Condition
Width Height Depth: 410.0mm 421.4mm 191.2mm
Monitor Weight: 5.2kgs/11.4lbs
Operating Temperature: 00C to +400C
Storage Temperature: -200C to +600C
Operating Relative Humidity: 10% to 95% Non-Condensing
Storage Relative Humidity: 10% to 95% Non-Condensing
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VG700b Series Service Manual
2-1
VG700b series
Chapter 2 Mechanical Construction
2- Package Overview
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