ViewSonic Vx2255wmb-2 Service Manual
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ViewSonic VX2255wmb-2 VX2255wmh-2 Model No. VS11661 22” wide Color TFT LCD Display (VX2255wmb-2_VX2255wmh-2_SM Rev. 1a Apr. 2007) ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583 Service Manual
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i ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2 Copyright Copyright © 2007 by ViewSonic Corporation. All rights reserved. No part of this publication may be reproduced, transmitted, tran scribed, 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 ot herwise, without the prior written permission of ViewSonic Corporation....
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ii ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2 TABLE OF CONTENTS 1. Precautions and Safety Notices 1 2. Specification 4 3. Front Panel Function Control Description 13 4. Circuit Description 19 5. Adjusting Procedure 41 6. Trouble Shooting Flow Chart 53 7. Block Diagrams 62 8. Schematic Diagrams 63 9. PCB Layout Diagrams 69 10. Exploded Diagram And Spare Parts List 73 11. Recommended Spare Parts List 78
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1 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2 1. Precautions and Safety Notices 1. SAFETY PRECAUTIONS This monitor is manufactured and tested on a ground principle that a user’s safety comes first. However, improper used or installation may cause damage to the monitor as well as to the user. WARNINGS: z This monitor should be operated only at th e correct power sources indicated on the label on the rear of the monito r. If you’re unsure of the power...
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2 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2 4 Handling and Placing Methods
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3 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2
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4 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2 2. Specification INTRODUCTION FEATURES VX2255wmb/wmh-2 Size 22 wide Luminance (Typ) 300 cd/㎡ Contrast Ratio (Typ) 1000:1 Colors 16.7 M (6 bits + 2 bits FRC) Response Time 5 ms(on/off) Viewing Angle (H/V) 170° / 160 ° TFTLCD PANEL 1st Recommend resolution 1680x1050@60Hz Analog Yes (75ohms, 0.7/1.0 Vp-p) Input Signal Digital Yes Separate Sync Yes Composite Sync Yes Sync Compatibility Sync on...
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5 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2 2-1 GENERAL specification Test Resolution & Frequency 1680x1050@ 60Hz Test Image Size Full Size Contrast and Brightness Controls Factory Default: Contrast = 70%, Brightness = 100% 2-2 VIDEO INTERFACE Analog Input Connector DB-15 (Analog), refer the appendix A Digital Input Connector DVI-D Audio input 1 3.5Mini Jack Headphone output 3.5Mini Jack Default Input Connector Defaults to the first detected...
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6 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2 2-3 POWER SUPPLY Internal Power Supply Part Number: 790961400600R INPUT VOLTAGE RANGE AC90~264 (Worldwide) Input Frequency Range 47 to 64 Hertz Short Circuit Protection Output can be shorted without damage Over Current Protection 3.3~4.5A typ. at 5 VDC ( Protect when short circuit ) Leakage Current 3.5mA (Max) at 264VAC / 50Hz EFFICIENCY 80 % typical at 115VAC Full Load Fuse Internal and not user...
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7 ViewSonic Corporation Confidential - Do Not Copy VX2255wmb-2 VX2255wmh-2 2-4 ELECTRICAL REQUIREMENT Horizontal / Vertical Frequency Horizontal Frequency 24 – 82 KHZ Vertical Refresh Rate 50 – 85* HZ Maximum Pixel Clock 165MHz, Sync Polarity Independent of sync polarity. Timing Table Analog Item Timing Separate Composite SOG Digital - TMDS Remark 1 640 x 350 @ 70 Hz, 32 kHz V V V V 2 640 x 400 @ 60 Hz, 32 kHz V V V V 3 640 x 400 @ 70 Hz, 32 kHz V V...