ViewSonic VX1935wm-3 User manual

ViewSonic VX1935wm-3
Model No. VS11444
19” Color TFT LCD Display
(VX1935wm-3_SM Rev. 1a Oct. 2006)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - [phone]
Service Manual

ViewSonic Corporation Confidential - Do Not Copy VX1935wm-3
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Copyright
Copyright © 2006 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 SM Editing Date ECR Number Description of Changes Editor
1a 10/26/2006 Initial Release Jamie Chang

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TABLE OF CONTENTS
1. Precautions and Safety Notices 1
2. Specification 4
3. Front Panel Function Control Description 13
4. Circuit Description 21
5. Adjustment Procedure 33
6. Troubleshooting Flow Chart 45
7. Recommended Spare Parts List 53
8. Exploded Diagram and Exploded Parts List 56
9. Block Diagram 60
10. Schematic Diagrams 61
11. PCB Layout Diagrams 68
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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:
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 you residence, consult your local
dealer or Power Company.
Use only the special power adapter that comes with this monitor for power input.
Do not try to repair the monitor by yourself, as it contains no user-serviceable parts. Only the
qualified technician can repair it.
Do not remove the monitor cabinet. There are high-voltage parts inside that may cause electric
shock to human bodies.
Stop using the monitor if the cabinet is damaged. Have it checked by a service technician.
Put your monitor only in a lean, cool, dry environment. If it gets wet, unplug the power cable
immediately and consult your closed dealer.
Always unplug the monitor before cleaning it. Clean the cabinet with a clean, dry cloth. Apply
non-ammonia based cleaner onto the cloth, not directly onto the glass screen.
Do not place heavy objects on the monitor or power cord.
2. 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.
3. SERVICE NOTES
When replacing parts or circuit boards, clamp the lead wires around terminals before soldering.
Keep wires away from high voltage, high temperature components and sharp edges.
Keep wires in their original position so as to reduce interference.
Adjustment of this product please refers to the user’ manual.
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Handling and Placing Methods
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2. Specification
1. INTRODUCTION
FEATURES VX1935wm-3
Size 19 " wide
Luminance (Typ) 300 cd/㎡
Contrast Ratio (Typ) 700:1
Colors 16.2 M (6 bits + 2 bits FRC)
Response Time 5 ms(on/off)
Viewing Angle (H/V) 160 ° / 160 °
TFTLCD PANEL
1st
Innolux
MT190AW01 V.0
Recommend resolution 1440x900@60Hz
Analog Yes (75ohms, 0.7/1.0 Vp-p)
Input Signal
Digital Yes
Separate Sync Yes
Composite Sync Yes
Sync Compatibility
Sync on Green Yes
PC Yes
Power Mac Yes
Compatibility
TV Box (NextVision 6) Yes
Power Voltage AC 100-240V, 50/60Hz Yes
On Mode(Max / Typ) 42 W / 35 W
Power Consumption
Off Mode (Max) ≦1 W
Audio 2W / THD 10% (Max) Yes
Tilt ( 20 ° - -5 °) Yes
Swivel No
Pivot No
Ergonomics
Height Adjust No
OSD Control [ 1 ] [ 2 ] [ ][▼] [▲] Yes
Physical (W x H x D) 450 x 434 x 209mm
Dimension
Package (W x H x D) 545*515*162mm
Physical (Net Weight) 5.2 Kg / 11.5 lbs
Weight
Package (Gross Weight) 6.7 Kg / 14.8 lbs
Temperature (℉/℃) 32℉-104℉/ 0℃-40℃
Operating Condition
Humidity (%) 20 % - 80 %
Temperature (℉/℃) -4℉-140℉/ -20℃-60℃
Storage Condition
Humidity (%) 10% - 90 %
Regulation
Global: CB, MPR II, WEEE,ROHS , ISO13406-2
VSA:UL, cUL, FCC-B, TUV-S, NOM, Energy Star
VSE:TUV/ERGO,CE ,GOST-R+Hygienic ,SASO , ENERGY
VSI: BSMI, CCC, PSB, C-TICK, MIC
VSCN:CCC
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2. GENERAL specification
Test Resolution & Frequency 1440x900 @ 60Hz
Test Image Size Full Size
Contrast and Brightness Controls Factory Default:
Contrast = 70%, Brightness = 100%
3. VIDEO INTERFACE
Analog Input Connector DB-15 (Analog),
Digital Input Connector DVI-D (Digital),
Default Input Connector Defaults to the first detected input
Video Cable Strain Relief Equal to twice the weight of the monitor for five minutes
Video Cable Connector DB-15 Pin out Compliant DDC 1/2B
Video Signals
1. Video RGB (Analog)
Separate, Composite, and Sync on Green
2. TMDS (Digital)
Video Impedance 75 Ohms (Analog), 100 Ohms (Digital)
Maximum PC Video Signal 950 mV with no damage to monitor
Maximum Mac Video Signal 1250 mV with no damage to monitor
Sync Signals TTL
DDC 1/2B Compliant with Revision 1.3
Sync Compatibility Separate Sync, Composite Sync, SOG
Video Compatibility Shall be compatible with all PC type computers, Macintosh
computers, and after market video cards
Resolution Compatibility
640 x 350*, 640 x 480, 720 x 400* (640 x 400*), 800 x 600, 832 x
624, 1024 x 768, 1152 x 864, 1152 x 870, 1280 x 720, 1280 x
960, 1280 x 1024 , 1400 x 1050 , 1440 x 900
* The image vertical size might not be full screen.
But the image vertical position should be at the center.
Exclusions Not compatible with interlaced video
4. POWER SUPPLY
Internal Power Supply Part Number:ILPI-024
Input Voltage Range 90 to 264 VAC (100~240VAC ±10%)
Input Frequency Range 47 to 63 Hertz
Short Circuit Protection Output can be shorted without damage
Over Current Protection 5.0 A typical at 14.0 VDC
Leakage Current 3.5mA (Max) at 254VAC / 60Hz
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Efficiency (at 115VAC Full Load) Typical: 80%
Minimum: 75%
Fuse Internal and not user replaceable
Power Output 35 Watts (typ)
Ripple and Noise Ripple: <3%
Max Input AC Current 1.2 Arms @ 100VAC, 0.6 Arms @240VAC
Inrush Current (Cold Start) 40 A (max) @ 120VAC
60 A (max) @ 220VAC
Power Supply Cold Start
Shall start and function properly when under full load, with all
combinations of input voltage, input frequency, and operating
temperature.
Power Supply Transient Immunity
Shall be able to withstand an ANSI/IEEE C62.41-1980 6000V 200
ampere ring wave transient test with no damage.
Power Supply Line Surge Immunity
Shall be able to withstand 1.5 times nominal line voltage for one
cycle with no damage.
Power Supply Missing Cycle Immunity
Shall be able to function properly, without reset or visible screen
artifacts, when ½ cycle of AC power is randomly missing at
nominal input.
Power Supply Acoustics
The power supply shall not produce audible noise that would be
detectable by the user. Audible shall defined to be in
compliance with ISO 7779 (DIN EN27779:1991) Noise
measurements of machines acoustics. Power Switch noise shall
not be considered.
Power Saving Operation(Method) VESA DPMS Signaling
Power Consumption
Mode LED Power Consumption
On Green 35 W (Typ)
42 W (max)
Stand By Amber < 2 W
Active Off Off < 1 W
Recovery Time On Mode = N/A, Active Off < 3 sec
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5. ELECTRICAL REQUIREMENT
Horizontal / Vertical Frequency
Horizontal Frequency 30 – 82 kHz
Vertical Refresh Rate 56 – 75 Hz
Maximum Pixel Clock 135 MHz
Sync Polarity Independent of sync polarity
Timing Table
Analog
Item
Timing
Separated
Composite
SOG
Digital - TMDS
Remark
1 640 x 350 @ 70 Hz, 31.5 KHz 



For Analog sync, the image vertical size image
will be not full screen (Still at the center)
2 640 x 400 @ 60 Hz, 31.5 KHz 



For Analog sync, the OSD will be
640x480@60Hz
3 640 x 400 @ 70 Hz, 31.5 KHz




For Analog sync, the image vertical size image
will be not full screen (Still at the center), And the
OSD will be 640x400/720x400 (primary=
720x400).
4 640 x 480 @ 50 Hz, 24.7 KHz 


5 640 x 480 @ 60 Hz, 31.5 KHz 



6 640 x 480 @ 67 Hz, 35 KHz 



7 640 x 480 @ 72 Hz, 37.9 KHz 



8 640 x 480 @ 75 Hz, 37.5 KHz 



9 640 x 480 @ 85 Hz, 43.3 KHz 



10 720 x 400 @ 70 Hz, 31.5 KHz




For Analog sync, the image vertical size image
will be not full screen (Still at the center), And the
OSD will be 640x400/720x400 (primary=
720x400).
11 720 x 480 @ 60 Hz, 31.5 KHz 



For Analog sync, the information OSD shows
640x480
12 720 x 576 @ 50 Hz, 31.3 KHz 



13 800 x 600 @ 56 Hz, 35.1 KHz 



14 800 x 600 @ 60 Hz, 37.9 KHz 



15 800 x 600 @ 72 Hz, 48.1 KHz 



16 800 x 600 @ 75 Hz, 46.9 KHz 



17 800 x 600 @ 85 Hz, 53.7 KHz 



18 832 x 624 @ 75 Hz, 49.7 KHz 



19 1024 x 768 @ 50 Hz, 39.6 KHz 



For Analog sync, Switch 1024x768@50Hz and
1280x768@50Hz by [1]+[2] short cut key
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