ViewSonic VX2739wm-1 User manual

ViewSonic VX2739wm-1

VX2739wm-CN

Model No. VS12843

27” Color TFT LCD Display

(VX2739wm-1_VX2739wm-CN_SM Rev. 1a May. 2010)

ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA- (800) 888-8583

Service Manual

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.

Product disposal at end of product life

The lamp in this product contains mercury. Please dispose of in accordance with local, state

or federal laws.

Revision History

Revision SM Editing Date ECR Number Description of Changes Editor

1a 5/7/2010 Initial Release Eden Chang

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TABLE OF CONTENTS

1. Precautions and Safety Notices.......................................................................................4

2. Specification .....................................................................................................................8

3. Front Panel Function Control Description ...................................................................17

4. Circuit Description...........................................................................................................20

5. Adjusting Procedure .......................................................................................................22

6. Trouble Shooting Flow Chart..........................................................................................68

7. Block Diagrams ..............................................................................................................74

8. Schematic Diagrams ......................................................................................................75

9. PCB Layout Diagrams ...................................................................................................78

10. Exploded Diagram And Spare Parts List .....................................................................79

11. Recommended Spare Parts List .................................................................................80

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1. Precautions and Safety Notices

Safety Instructions

The symbol is intended to alert the user to presence of un-insulated

“Hazardous Voltage” within the product’s enclosure that may be of sufficient

magnitude to constitute a risk of electric shock to persons.

This symbol is intended to alert the user that improper use of the product

may result in product malfunction. The user should pay attention to avoid

accidents or unnecessary problems.

Wet Location

Apparatus shall not be exposed to dripping or splashing and that no objects filled

with liquids, such as vases, shall be placed on the apparatus.

Outdoor Use

WARNING: To reduce the risk of fire or electric shock, do not expose this

apparatus to rain or moisture.

Disconnect Device - The Mains Plug or An Appliance Coupler

The mains plug or an appliance coupler is used as the disconnect device for

disconnection from the mains, the disconnect device shall remain readily

operable.

Safety

Operate the Monitor on 100V and 120 V AC only.

Use the AC power cord specified by ViewSonic and suitable for the voltage where

you use it.

The plug is designed, for safety purposes, to fit into the wall outlet only one way.

If you are unable to insert the plug fully into the outlet, contact your dealer.

If any liquid or solid object should fall inside the cabinet, stop operating, unplug the

Monitor immediately and have it checked by qualified service technician.

If you will not be using the Monitor for a long time, disconnect the power by pulling

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the plug itself. Do not pull on the cord.

Carrying The LCD Monitor

To prevent dropping the Monitor and causing serious injury, you must follow these

guidelines:

Disconnect all cables before carrying the Monitor.

Carrying the large size Monitor requires at least two or three people.

When you carry the Monitor, place your hands as illustrated and hold it securely.

Do not put stress on the LCD panel and the frame around the screen.

When carrying the Monitor, do not subject it to shocks, vibration, or excessive

force.

When lifting or moving the Monitor, hold it securely from the bottom. Place your

palm directly under the panel.

Installed on the wall

Installed with stand

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Leave at least this space around the set. Do not install the Monitor set as follows:

Air circulation is blocked.

Broken pieces

Do not throw anything at the LCD.

Doing so may break the screen glass and cause serious injury.

If the surface of the LCD cracks, unplug the AC power cord before touching the

LCD. Otherwise electric shock may result.

Handling of broken glass and liquid crystal leakage

If the LCD panel gets damaged, crystalline liquid leakage may occur, or scattered

broken glass may result.

Do not touch broken glass or crystalline liquid which is toxic, with bare hands as

cuts, poisoning or skin irritation may occur.

Also do not glass fragments or leaked crystalline liquid get into your eyes or mouth.

Should either contacted your eyes or mouth, rinse the contacted area thoroughly

with water and consult your doctor.

Note

This television includes a QAM demodulator, which should allow you to receive

unscrambled digital cable television programming via subscription service to a

cable service provider.

The type of programming and signal provided by your cable service provider will

affect the availability of digital cable television programming in your area.

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2. Product Specification

2.1 Product definition

Product Name ViewSonic VX2739WM

Model Number VS12843

OSD Languages

English

French

German

Spanish

Italian

Finnish

Russian

Japanese

Korean

Traditional Chinese

Simplified Chinese

TFT LCD Panel and Model # 1st source : CMO M270H1-L01

Scalar TSUMO88GDI-LF-1

Input Signal D-Sub /DVI/HDMI

Sync Compatibility Separate Sync / Composite Sync / SOG

Adapter Internal Power Board

Power Cable (Refer to APPENDIX B) Yes

15 pin mini D-SUB Analog Cable (1.8 m,

black), with PC 2001.

(Detached cable; refer the Appendix A)

Yes

DVI-D Cable(1.8m, black) with PC 2001

(refer to Appendix A) Yes

Audio Cable(1.8m, black) with PC 2001 Yes

MIC Cable(1.8m, black) with PC 2001 No

USB Cable (V2.0)

(1.8m, black) with PC 2001 Yes

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2.2 Specification

Dimensions (with

stand)

Physical(W)x(H)x(D)

647 mm (W) x 490 mm (H) x 250 mm (D)

Weight 6.8 kg

LCD 27" Color active matrix TFT LCD

Pane CMO M270H1-L01

Contrast Ratio 1200 :1 (Typ.)

Display area 597.89 mm (H) x 336.31 mm (V)

Pixel Pitch 0.3114 mm (H) x 0.3114 mm (V) pixel

Native Resolution 1920 x 1080

Speaker Output 2W x 2

2.3 Front View and Rear View

o. Name Photo Materials Piece Texture Color Scheme

1 Front

ABS 1

POLISH #

8000 Viewsonic black

2 Back

ABS 1

Mold-Tech

MT-11020

(Logo is

POLISH #

8000)

Viewsonic black

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3 Power

button ring

ABS 1 electroplate silver

4 Neck

ABS 1

POLISH #

8000 Viewsonic black

5 Key button

ABS 1

Mold-Tech

MT-11010 Viewsonic black

6 base

ABS 1

POLISH #

8000 Viewsonic black

7 base_ring

ABS 1 electroplate silver

8 Power

button

Transluce

1 POLISH #

8000

1. Black by

painting at

core-side

surface.

2.Power icon by

Lacer-engravin

g and then

painting

pantone # 427C

3. Blue LED.

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** ViewSonic Black_matt

L* a* b*

27.47 -0.06 -0.8

*CIE1976; Polish level = 1200; Follow the Equipment in ViewSonic Lab

*1. The reference for the cabinet components is the color chip provided by ViewSonic.

*2. The color difference between any two panel head cabinet components shall be ∆E <0.8, in the 1976

CIE L*a*b Colorspace.

*3. The color difference between any two base cabinet components shall be ∆E <0.8, in the 1976 CIE

L*a*b Colorspace.

2.4 Audio Interface (Speaker Specification)

Line input signal 1.0 Vrms @1kHz

Line input impedance 10 Kohm

Maximum Amp power output (Watt) 2.4 W @ SPKVDD=5V 4OHM

Amp -THD < 10 % THD @1kHz

Speaker Power rating(Ω/Watt) 4Ω/ 2 W

Signal to Noise Ratio 50 db

Frequency response Fo – 20kHz

SPL. 91 dB (at 0.1w/0.1m)

FO 820 Hz

Line input connection

1. 3.5 mm stereo jack

2. HDMI

Vibration

There should be no audible vibration

resonance at volume=100% & any

Freq.

Screen image There should be no affect on the screen

image stability under any conditions

Connector PC99 requirement Audio in Lime Green pantone # 577C

Cable type / length 3.5mm stereo cable / 1.8m length

Audio DPMS Speakers stay off when the rest of the

monitor is in power saving

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