Service Manuals, User Guides, Schematic Diagrams or docs for : Viewsonic Мониторы LCD Мониторы LCD Viewsonic VG712 VG712 VG712s_SM_835
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Service Manual
ViewSonic VG712s-1
Model No. VLCDS23719-6W
17" Color TFT LCD Display
(VG712_SM_835 Rev. 1a June 2004)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright 2004 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 Date Description Of Changes Approval
1a 06/108/04 Initial Release DCN-4475 Angela Lu
ViewSonic Corporation Confidential - Do Not Copy VG712s
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TABLE OF CONTENTS
1. Precautions and Safety Notices 1
2. Specification 5
3. Front Panel Function Control Description 15
4. Circuit Description 22
5. Adjusting Procedure 25
6. Trouble Shooting Flow Chart 50
7. Recommended Spare Parts List 54
8. Exploded Diagram And Spare Parts List 57
9. Block Diagram 60
10. Schematic Diagrams 61
11. PCB Layout Diagrams 67
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1. Precautions and Safety Notices
1. Appropriate Operation
(1) Turn off the product before cleaning.
(2) Use only a dry soft cloth when cleaning the LCD panel surface.
(3) Use a soft cloth soaked with mild detergent to clean the display housing.
(4) Use only high quality and safety approved AC/DC power adapter.
(5) Disconnect the power plug from AC outlet if the product is not used for a long period of time.
(6) If smoke, abnormal noise, or strange odor is present, immediately switch the LCD display off.
(7) Do not touch the LCD panel surface with sharp or hard objects.
(8) Do not place heavy objects on the LCD display, video cable, or power cord.
(9) Do not use abrasive cleaners, waxes or solvents for your cleaning.
(10) Do not operate the product under the following conditions:
- Extremely hot, cold or humid environment.
- Areas susceptible to excessive dusts and dirt.
- Near any appliance generating a strong magnetic field.
- Place in direct sunlight.
2. Caution
No modification of any circuit should be attempted. Service work should only be performed after you are thoroughly
familiar with all of the following safety checks and servicing guidelines.
3. Safety Check
Care should be taken while servicing this LCD display. Because of the high voltage used in the inverter circuit, the voltage
is exposed in such areas as the associated transformer circuits.
4. Power Supply Requirements
The external power converter for this display utilizes AC and DC cords, AC cord is detachable, but DC cord is permanently
attached. Any attempt to replace another adapter could result in serious problems on the display.
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5. LCD Module Handling Precautions
5.1 Handling Precautions
(1) Since front polarizer is easily damaged, pay attention not to scratch it.
(2) Be sure to turn off power supply when inserting or disconnecting from input connector.
(3) Wipe off water drop immediately. Long contact with water may cause discoloration or spots.
(4) When the panel surface is soiled, wipe it with absorbent cotton or other soft cloth.
(5) Since the panel is made of glass, it may break or crack if dropped or bumped on hard surface.
(6) Since CMOS LSI is used in this module, take care of static electricity and insure human earth when
handling.
(7) Do not open nor modify the Module Assembly.
(8) Do not press the reflector sheet at the back of the module to any directions.
(9) In case if a Module has to be put back into the packing container slot after once it was taken out from the
container, do not press the center of the CCFL Reflector edge. Instead, press at the far ends of the CFL
Reflector edge softly. Otherwise the TFT Module may be damaged.
(10) At the insertion or removal of the Signal Interface Connector, be sure not to rotate nor tilt the Interface
Connector of the TFT Module.
(11) After installation of the TFT Module into an enclosure (LCD monitor housing, for example), do not twist
nor bend the TFT Module even momentary. At designing the enclosure, it should be taken into
consideration that no bending/twisting forces are applied to the TFT Module from outside. Otherwise the
TFT Module may be damaged.
(12) Cold cathode fluorescent lamp in LCD contains a small amount of mercury. Please follow local ordinances
or regulations for disposal.
(13) Small amount of materials having no flammability grade is used in the LCD module. The LCD module
should be supplied by power complied with requirements of Limited Power Source (IEC60950 or UL1950),
or be applied exemption.
(14) The LCD module is designed so that the CFL in it is supplied by Limited Current Circuit (IEC60950 or
UL1950). Do not connect the CFL in Hazardous Voltage Circuit.
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5.2 Handling and Placing Methods
Correct Methods: Incorrect Methods:
Only touch the metal frame of the LCD panel or the front Surface of the LCD panel is pressed by fingers and that
cover of the monitor. Do not touch the surface of the will probably cause "Mura."
polarizer.
Take out the monitor with cushions Take out the monitor by grasping the LCD panel. That
will probably cause "Mura."
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Place the monitor on a clean and soft foam pad. Place the monitor on foreign objects. That will probably
scratch the surface of the panel or cause "Mura."
The panel is placed facedown on the lap. That will
probably cause "Mura."
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2. Specification
1. General Requirements
General Specifications
Test Resolution & Frequency 1280x1024 @ 60Hz
Test Image Size Full Size
Factory Default:
Contrast and Brightness Controls
Contrast = 70%, Brightness = 100%
2. Signal Interface
Video Interface
Analog Input Connector DB-15 (Analog)
Digital Input Connector DVI-I (Digital)
Default Input Connector Defaults to the first detected input
Video Cable Connector DB-15 Pin out Compliant DDC 2B
Video Signals 1. Video RGB (Analog)
Separate
2. TMDS (Digital)
Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)
Exclusions Not compatible with interlaced video
3. Power
Power Supply
Power Supply (Adapter) Part Number: LSE 0107A1240
Input Voltage Range 90 to 264 VAC
Over Current Protection 12.7V ~ 18V full load
Power Dissipation 40 Watts (typ.)
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4. Electrical Requirements
Horizontal / Vertical Frequency
Horizontal Frequency 30 ◦ Jabse Service Manual Search 2026 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo