Text preview for : VG500b-1_SM_1c.pdf part of Viewsonic VG500b-1 SM 1c Viewsonic Мониторы LCD Мониторы LCD Viewsonic VG500 VG500 VG500b-1_SM_1c.pdf
Back to : VG500b-1_SM_1c.pdf | Home
Service Manual
ViewSonic VG500b-1-1
Model No. VLCDS24349-1
15" Color TFT LCD Display
(VG500b-1_SM_574 Rev. 1c Feb. 2004
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright 2003 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 10/01/02 Initial Release DCN-2350 K.Yang
1b 10/31/02 Revise DCN-2350 C.Shen
1c 02/10/04 Change Scaler to MRT MV2 DCN-4213 Angela Luh
ViewSonic Corporation Confidential - Do Not Copy VG500b
i
TABLE OF CONTENTS
1. Precautions and Safety Notices 1
2. Specification 2
3. Front Panel Function Control Description 3
4. Circuit Description 7
5. Adjusting Procedure 14
6. Trouble Shooting Flow Chart 18
7. Recommended Spare Parts List 22
8. Exploded Diagram And Spare Parts List 28
9. Block Diagram 31
10. Schematic Diagrams 34
11. PCB Layout Diagrams 43
ViewSonic Corporation Confidential - Do Not Copy VG500b
ii
1. Precautions and Safety Notices
This monitor is manufactured and tested on a ground principle that a user's safety comes first.
However, improper use or installation may cause damage to the monitor as well as to the user.
WARNINGS
l This monitor should be operated only at the correct power sources indicated on the label on
the rear of the monitor. If you're unsure of the power supply in your residence, consult your
local dealer or Power Company.
l Use only the special power adapter that comes with this monitor for power input.
l Do not try to repair the monitor by yourself, as it contains no user-serviceable parts. This
monitor should only be repaired by a qualified technician.
l Do not remove the monitor cabinet. There are high-voltage parts inside that may cause
electric shock to human bodies.
l Stop using the monitor if the clean is damaged. Have it checked by a service technician.
l Put your monitor only in a clean, cool, dry environment. If it gets wet, unplug the power cable
immediately and consult your local dealer.
l Always unplug the monitor local cleaning it. Clean the cabinet with a soft, dry cloth.
Apply non-ammonia based cleaner onto the cloth, not directly onto the glass screen.
l Do not place heavy objects on the monitor or power cord.
PRODUCT SAFETY NOTICE
Many electrical and mechanical parts in this chassis have special safety visual inspections and
the protection afforded by them cannot necessarily be obtained by using replacement
components rated for higher voltage, wattage, etc. Before replacing any of these components
read the parts list in this manual carefully. The use of substitute replacement parts, which do not
have the same safety characteristics as specified in the parts list, may create shock, fire, or other
hazards.
SERVICE NOTES
l When replacing parts or circuit boards, clamp the lead wires around terminals before
soldering.
l Keep wires away from high voltage, high temperature components and sharp edges.
l
Keep wires in their original position so as to reduce interference.
l Adjustment of this product please refer to the user' manual.
SERVICE TOOLS & EQUIPMENT REQUIRED
l SIGNAL GENERATOR: Chroma 2237 or equivalent
l MULTIMETER Fluke 45 or equivalent
l SCREW DRIVER
l OSCILLOSCOPE Tektronik TDS3054 digital oscilloscope or equivalent
l SOLDER IRON
ViewSonic Corporation Confidential