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 - (800) 888-8583

Service Manual

ViewSonic Corporation Confidential - Do Not Copy VX1935wm-3

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

VX1935wm-3

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