ViewSonic VG700B Manuale utente

Service Manual

Model No. VLCDS23719-3W

17” Color TFT LCD Display

ViewSonic VG700b

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

(VG700b-1_SM_604 - Rev. 1a – Oct 2002)

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

ViewSonic Corporation ii Confidential – Do Not Copy VG700b

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

ViewSonic Corporation iii Confidential – Do Not Copy VG700b

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

ViewSonic Corporation vConfidential – Do Not Copy VG700b

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

Complete parts list

PCB Layout

2Schematic Diagrams

Chapter112-1~12-

13-1~13-

14-1~14-5

ViewSonic Corporation vi Confidential – Do Not Copy VG700b

9-1

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.

ViewSonic Corporation Confidential – Do Not Copy VG700b

VG700b Series Service Manual

1-2

VG700b series

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)

ViewSonic Corporation Confidential – Do Not Copy VG700b

2 0 cd/m2 (max),brightness,

8250 cd/m2(typ),

2 0 cd/m2(min)

40:1 (max) contrast ratio,

400:1(typ),

250:1(min)

VG700b Series Service Manual

1-3

VG700b series

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)

ViewSonic Corporation Confidential – Do Not Copy VG700b

VG700b Series Service Manual

1-4

VG700b series

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

ViewSonic Corporation Confidential – Do Not Copy VG700b

VG700b Series Service Manual

2-1

VG700b series

Chapter 2 Mechanical Construction

2- Package Overview

ViewSonic Corporation Confidential – Do Not Copy VG700b

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